Low voltage switchgear
Compact Merlin Gerin
Exploitation guide
d
pe
trip
t
se
re
O F
OF
ex
4
sh
pu
to
trip
RIN
GE
LIN S
ER t N
M pac
Io
1
m
co
250N
2 Nm
1
P93083
MERLIN GERIN
compact
NS250 N
OFF
Ui 750V. Uimp 8kV.
Icu
Ue
(kA)
(V)
85
220/240
36
380/415
35
440
30
500
8
660/690
50
250
cat A
Ics=100% Icu
M
IEC947-2
UNE NEMA
UTE VDE BS CEI
push
to
trip
.95
3
.98
2
8
Im
E
E/G
5
ON
R
ST
22
Ir
.93
64/
h
pus
to
trip
.98
R
ST
Io
A
.63
.8 xIo
.9
1
.8
4
T
t
s
t
c
3
te
le
s
1
.85
co
co nn
S nn
T1 ec
ec
08 tio
tin
... g n
41 to
8
G
it
k
Im
s
t
E
R
L
IN
xIr
co
co nn
S nn
TR ec
ec
22 tintio
... g n
58 to
A
60
=1
11
t
tes
10
2
.98
In
9
8
3
te
bs
at
t
4
7
5
4
.95
M
.93
.9
e
6
1
.85
.5 xIn
Im
4
3 E
3
6 R
(T 2 IN
) /36
7
0
1
/2
Im
1
.7
Ir
Ih
SE
.88
.9
.8
60
=1
.5 xIn
)
r
%I
rm 905
10
ala
22
Ir
t
tes
xIr
.88
Io
A
1,5
7
10
2
(S
R
6
8
3
1
0A
16
64/
h
pus
to
trip
ST
Im
5
4
.95
te
OFF
.93
.98
1
.8 xIo
.7
.63
SE
8
.85
In
1
r
%I
rm 905
10
ala
22
Ir
.9
2
.9 1
0A
16
.95
.88
.8
3
2
SE
.9
Io
ed
tripp
S
22 S
STR
Ir
xIr
xIn
T
alarm
6
10
1.5
1
.63
STR 22 SE
90 %Ir
105
5
4
.9
.85
.8
.7
TES
160/250A
Im
Ir
In=250A
.8 xIo
cat
.7
.63
Ir
.5 xIn
3
928
no 2
Im
62
433
A
160
M5
6x
2 in
6x.
A
144
.9 = 136.8A
In x
=
Io = o x .95 820.8A
I
Ir =GERIN Ir x 6 =
MERLIN
Im =
MERLIN GERIN
compact
NS400 H
compact
C 1001 H
Ui 750V. Uimp 8kV.
Icu
Ue
(kA)
(V)
OFF
100
70
65
40
35
220/240
380/415
440
500/525
660/690
3
cat B
Icw 8kA / 0,25s.
Ics = 100% Icu
IEC 947-2
UTE VDE BS
UNE NEMA
Ui 750V.
Ue
(V)
Uimp 8kV.
Icu
(kA)
220/240
380/415
440
500/525
660/690
100
70
65
40
35
8
In
ex:
m
8m
in
.31
cat B
Icw 6kA / 0,25s
Ics = 100% Icu
IEC 947-2
UTE VDE BS
UNE NEMA
CEI
In = 400A
CEI
PUSH TO TRIP
push
to
trip
60 70 80 90
STR 55UE
fault
Ir
test
Im
I
OFF
Ih
t
Io
STR 53 UE
Ir
Io
.8
.63
.9
.93
.95
.8
1
.88
tr
T
tm
test
120
60
240
ON
I
th
tm
15
Ir
Im I
4
5
1.5
10
2
240
(s) at 1.5 Ir
6
3
8
2
.3
0
6
12
0
2
I t off
fault
test
µP
8
10
>Ir
Ic
.88
.93
.95
.85
.98
.9
.1
on
4
1.5
.3
.2
.2
R
x In
x Ir
tm
(s)
.1
30
E
E/G
22 S
STR
105 %Ir
90
I
3
.98
x Io
x In
tr
T
TES
75
60
Im
.85
1
.5
tr
xIn
i
400
105 %Ir
.8
>Im
1
TFR
1
d
pe
trip
OFF
t
se
re
O F
OF
1
64/
h
pus
to
trip
R
ST
a
22
Ir
SE
.93
.95
.9
.98
Io
sh
pu
to
trip
RIN
GE
LIN S
ER t N
M pac
m
co
.88
.9
1
1
.85
.8
60
=1
In
.8 xIo
.7
.63
Ir
2
.5 xIn
Im
1
Nm
■ Merlin Gerin ■ Square D ■ Telemecanique
4
A
ex:
60A
In 1
discovering your circuit breaker
the toggle operated circuit breaker ..................................... 4
the motor mechanisms .................................................................... 5
the circuit breaker with rotary handle ....................................... 7
electrical auxiliaries .......................................................................... 8
Merlin Gerin
3
the toggle operated circuit breaker
rating
plate
MERLIN
GERIN
posative contact indication
range
E32507
compact
NS160 H
Compact NS circuit breakers are
suitable for isolation as defined by IEC
947-1 et 947-2.
model (rating and breaking capacity)
standardised characteristics:
v Ui = rated insulation voltage
v Uimp = impulse withstand voltage
v Ue = rated operational voltage
v Icu = ultimate breaking capacity
v Ics = service breaking capacity
Ui 750V. Uimp 8kV.
Ue
(V)
220/240
380/415
440
500/525
660/690
250
Icu
(kA)
100
70
65
50
10
85
When the toggle is in the "OFF"
position, the main contacts are
ALWAYS open.
It is therefore possible to carry out
maintenance on the downstream
circuits. When doing so, it is advised to
lock the circuit breaker in the OFF
position and to comply with applicable
servicing regulations for low voltage
circuits.
colour indicating the type of device:
v yellow = E
v silver = N
v pink = H
v blue = L
v green = switch
Ics = 100% Icu
cat A
symbol indicating suitability for isolation
as defined by IEC 947.2
IEC 947.2
main standards with which
device conforms
UTE VDE BS CEI UNE NEMA
Resetting following a trip
When the circuit breaker is in the
"tripped" position it must first be reset
by moving the toggle to the OFF
position before reclosing is possible.
E32505
circuit breaker with toggle
upstream connections
rating plate (see above)
MERLIN GERIN
compact
NS160 H
E32506
fixing hole
indication of closed
(I/ON) position
I
ON "I" closing
Ui 750V. Uimp 8kV.
Ue
(V)
220/240
380/415
440
500/525
660/690
250
Icu
(kA)
100
70
65
50
10
85
tripped
toggle
(shown in tripped position)
push
to
trip
Ics = 100% Icu
cat A
indication of open
(O/OFF) position
O
OFF "O"
reset
circuit identification
IEC 947.2
UTE VDE BS CEI UNE NEMA
push
to
trip
In=100A
.8
Io
Im
x In
.88
.93
.95
.85
.98
.9
1
.5
Ir
Ir
.9
.7
.63
.8
x Io
1
trip unit rating
"push to trip"
button
40/100
STR 22 SE
alarm
%Ir
90
105
STR 22 SE
Im
6
5
4
7
3
+
-
trip unit (see page 11)
8
10
2
x Ir
test
fixing hole
downstream connections
4
Merlin Gerin
the motor mechanisms
The motor mechanism module can
be used to open and close the circuit
breaker and charge the operating
mechanism spring via electrical
signals.
Its position and small dimensions leave
trip unit settings visible and accessible.
It can be tipped forward for access to
connections ans auxiliaries (voltage
releases, indication switches).
E32508
NS100 to 630 motor mechanisms
upstream connection
lock for access to
electrical auxiliaries
circuit identification
"off" position keylock
(option available on
NS400/630 only)
MERLIN GERIN
compact
2
NS400 H
Ui 750V. Uimp 8kV.
Ue
Icu
(V)
(kA)
spring-charging lever
(stored-energy mechanism)
rating plate (see page 4)
main contacts position
indicator (1)
cat B
Icw 6kA / 0,25s.
Ics = 100% Icu
I ON
charged
IEC 947-2
UTE VDE BS
UNE NEMA
(1) main contacts position indicator
E32509
100
70
65
40
35
CEI
In = 400A
manu
O
I
push OFF
push ON
auto
STR 53 UE
Io
.8
1
.5
+
-
.93
.95
.85
x Io
tr 120
60
Im
75
4
tm .3
(s)
2
I
6
3
6
T
> 105 %Ir
90
5
2
8
1.5 x Ir 10
1
240
60
4
3
.98
.8
x In
tr
Ir
.9
.88
.5
8
.4
2
10
1.5 x In 12
.3
test
.3
2
manual/automatic operation
selector (3)
.4
.3
> Ih
open/isolated
charged
spring charged
spring discharged
(3) manual/automatic operation
selector :
c in manual mode, electrical control
signals are inhibited,
c in automatic mode, only electrical
control signals are executed.
push button to open contacts
> Im
OFF
discharged
fault
> Ir
.8
.2 x In 1
O
(2) mechanism status indicator
µP
.6
.7
th (s) .4
.3
Ih
closed
mechanism "charged/
discharged" indicator (2)
push button to close contacts
.63
ON
Isolation is guaranteed when the
indicator signals OFF.
operations counter
(option available on
NS400/630 only)
1
I
"off" position locking with a
padlock (see page 40)
E32510
220/240
380/415
440
500/525
600/690
E32511
operation cycle in manual mode
O
OFF
I
O
push ON
push OFF
I
charged
(locking in position is possible)
ON
fault
or
discharged
O
OFF
discharged
(locking in position is possible)
manual spring charging
operating cycle in automatic mode
automatic spring charging
ON
OFF
fault
O
OFF
I
charged
ON
discharged
O
OFF
discharged
manual spring charging
manual spring charging
manu/auto
determine
cause of
fault
manu/auto
to
u/au
man
O
push
OFF
I
push
ON
(9 times)
O
Merlin Gerin
OFF
discharged
O
OFF
charged
5
the motor mechanisms
The motor mechanism module can be
used to open and close the circuit
breaker via electrical signals.
Its position and small dimensions leave
trip unit settings visible and accessible.
It can be tipped forward for access to
connections ans auxiliaries (voltage
releases, indication switches).
E33379
C801 to C1251 type T motor mechanism
upstream connections
keylock to block handle
Manual operation is possible by
opening the transparent front cover :
c breaks the electrical circuit.
c gives access to the operating handle
(open - close).
c allows the device to be locked by up
to 3 padlocks.
I
front cover giving access
to the manual control
MERLIN GERIN
compact
C801
Ui 750V. Uimp 8kV.
Ue
Icu
(V)
(kA)
220/240
380/415
440
500/525
660/690
rating plate
100
70
65
50
20
I
cat B
Icw 6kA / 0,25s.
Ics = 100% Icu
lock position open
IEC 947-2
UTE VDE BS
UNE NEMA
CEI
In = 400A
O
manual operating
handle
O
STR 55UE
60 70 80 90
105 % Ir
trip unit
(see page 11)
fault
Io
.63
.8
t
Ir
test
Ir
Ic1
.5
tr
1
.85
.8
Im
Ih
th
+
tm
S
–
B
C 801 N•H L
C 1001 N•H L
10
8
15
8
C 1251N•H
10
12
i
–
4
I
5
1
2
1.5
240
xIr
.3
Ih
6
.1 .85
.8
0
0
I2t
off
.4
.3
A
xIn
.5
.2
B
xIn
.4
.9
.2
.1
480
8
8 3
10
2
.3
.2
xIr
.6
.4
.95 .3
.3
.2
.2
1
.1
on
I2t
.1
off
Ic1
at 1.5Ir
tr
5
6 4
on
+
T
xIo
120
60
30
15
I
A
.9
.95 3
xIn
TFR
Im
tm
th
downstream connections
Position "ON" closed
E33382
E33381
E33380
Locking by 3 padlocks
Position "OFF" open
I
I
I
O
O
O
60 70 80 90
O
105 % Ir
fault
6
Merlin Gerin
the circuit breaker with rotary handle
E32512
circuit breaker with rotary handle
The direct and extended rotary
handles do not inhibit:
c visibility of and access to trip unit
settings,
c positive contact indication (suitability
for isolation),
c indication of the three positions:
O, I, "tripped",
c access to the trip test buttton marked
"push to trip".
upstream connection
keylock to block handle
(option)
ON
on-position indicator
I
handle locking using a padlock
circuit identification
tripped
Compact NS100 to 630 optional
handles:
the following accessories are available :
c MCC version
(motor control and command),
c machine tool version.
tripped-position indicator
MERLIN GERIN
compact
rotary handle
reset
STR 22 SE
.8
Io
.7
x In
alarm
%Ir
90
105
trip button marked
"push to trip"
Im
.88
.93
.95
4
7
.85
.98
3
8
.9
1
.5
Im
Ir
.9
.63
Ir
OFF
1
.8
x Io
6
5
10
2
x Ir
+
-
E32513
In=100A
off-position indicator
O
push
to
trip
I/ON
(closed)
trip unit (see page 11)
test
ON
downstream connection
I
tripped
rating plate (see page 4)
closing
tripped
reset
reset
O
OFF
O/OFF
(open
isolated)
circuit breaker equipped
with an extended rotary
handle
The extended rotary handle
comprises :
c a case mounted on the Compact NS
in place of the front cover (1),
c an extension shaft (2),
c an assembly fixed to the door (handle
and front) (3).
E32514
1
2
ON
I
3
O
OFF
ON
I
Options :
Telescopic shaft for devices mounted
on a withdrawable chassis.
With the exception of the rating plate
and the "push to trip" button, the
extended rotary handle provides the
same information as the direct rotary
handle, and is achieved in the same
manner.
Access to the trip unit settings and
the "push to trip" test button is
possible when the door is open.
Compact C801 to C1251 option :
includes the same components as the
door interlocking version, but is only
available with a short extension shaft.
CAM (early make/break contacts)
c a single early break changeover
contact, used to operate pre-tripping
mechanisms.
c a double early make contact.
Both these contacts are mounted in the
'handle front box' for both the direct and
extended versions.
O
OFF
Merlin Gerin
7
OF1 SD
E32518
E32517
E32516
E32515
electrical auxiliaires
SDE OF2
SD
OF
(2)
OF1 OF2 OF3
MN/MX
MN/MX
SD
SDE
(1)
SD
Compact NS80
MN/MX
OF2
MITOP
SDV
MN/MX
OF1
SDV
OF3
SDE
Compact NS100/160/250
+ Vigi (optional)
(1) slot for:
c a MITOP release if the circuit breaker is fitted
with an electronic trip unit;
c an adapter required if the circuit breaker is fitted
with a thermal-magnetic trip unit and an SDE
contact.
(2) slot for auxiliary connections for STR53UE trip
unit options.
All auxiliaries are located behind the
circuit breaker front plate, the motor
mechanism module or the rotary
handle, in a compartment insulated
from the power circuits.
Function and terminal markings are
embossed on the circuit breaker frame
for each slot.
Auxiliary contacts and releases are
physically identical for all ratings.
8
Compact NS400/630
+ Vigi (optional)
Compact C801/1001/1251
A single type of auxiliary contact is
used for all indication functions (OF,
SD, SDE, SDV).
The contact function is determined
by the slot it occupies in the circuit
breaker.
Auxiliary contacts snap easily into
position.
Connections are made via integrated
screw terminals.
Merlin Gerin
electrical auxiliaries
E18608
auxiliaries switches
Auxiliary contacts remotely indicate
circuit breaker positions.
Contact OF
NC and NO changeover contact.
This auxiliary contact indicates the
position of the circuit breaker contacts
(open or closed).
E23839
For NS100 to NS630
For C801 to C1251
E18609
voltage releases
Contact SDE
fault trip indication.
This auxiliary contact indicates that the
circuit breaker has tripped due to an
electrical fault:
c overload,
c short-circuit,
c insulation fault detected by the Vigi
module.
Switch SD
trip indication.
This auxiliary contact indicates that the
circuit breaker has tripped due to one of
the following:
c overload,
c short-circuit,
Voltage releases are used to trip the
circuit breaker voluntarily by means of
an electric signal (e.g. emergency off
button).
c earth fault,
c an MX or MN release,
c pressing of the "Push to trip" button,
c racking in or out,
c manual opening on the front of the
motor mechanism module.
Contact SDV
insulation fault indication.
This auxiliary contact indicates that the
circuit breaker has tripped due to an
earth fault.
Contact CAM
early make/break contact which mounts
in the rotary handle.
Option COM (communication).
For transmission of data using the
Dialpact protocol.
Release MX
This shunt release trips the Compact
NS as soon as the voltage across its
terminals reaches 70% of the rated
voltage.
Release MN
This undervoltage release trips the
Compact NS when the voltage in its
control circuit drops below 70% of the
rated voltage.
The circuit breaker can be reclosed as
soon as the voltage has reached 85%
of the rated value.
Merlin Gerin
9
10
Merlin Gerin
how to setup your trip unit
trip unit settings - general comments
introduction ............................................................................................. 12
Compact NS100-160-250 A ................................................................... 14
Compact NS400-630 A ........................................................................... 15
Compact C801-1001-1251 A .................................................................. 16
trip unit settings - details
thermal - magnetic :
TM16D to TM250D ................................................................................. 17
electronic :
STR22SE - STR22GE ............................................................................ 18
STR23SE ................................................................................................ 20
STR53UE ............................................................................................... 21
STR25DE and STR25DE (*) (fine adjustment) ....................................... 24
STR35SE/GE ......................................................................................... 26
STR45AE ................................................................................................ 27
STR45BE ................................................................................................ 28
STR55UE ............................................................................................... 29
increased setting range with 150 and 250 A CTs ................ 22
remote indication and electronic trip unit options
STR22SE, STR23SE, STR53UE ........................................................... 23
STR45AE/BE, STR55UE ........................................................................ 30
testing of electronic trip units
STR22SE, STR23SE, STR53UE ........................................................... 31
STR25DE, STR35DE/GE ....................................................................... 31
STR45AE/BE, STR55UE ........................................................................ 31
electronic trip unit settings for motor protection
STR22ME ............................................................................................... 32
STR43ME ............................................................................................... 33
STR35ME ............................................................................................... 34
Merlin Gerin
11
trip unit settings - general comments
overload protection
Tripping time depends on the level of
the fault:
c the circuit breaker will trip within
2 hours for a current equal to :
v 120% of Ir for electronic trip units,
v 130% of Ir for thermal-magnetic trip
units.
c the circuit breaker must not trip for a
load under 105% of Ir.
c Compact circuit breakers can also be
fitted with a Vigi earth-fault protection
module that trips the circuit breaker in
the event of an insulation fault (risk of
electrocution or fire due to earth
leakage current).
All Compact trip units (NS100 to
NS630) incorporate the reflex-tripping
system, an exclusive Merlin Gerin
feature that ensures discrimination,
even for very high short-circuit currents.
E32521
The trip unit is the component that
monitors the electrical current flowing
through the circuit breaker and opens
the circuit breaker in the event of a
fault.
c thermal-magnetic and electronic trip
units detect overloads and shortcircuits;
STR 53 UE
Ir
Io
.63
.8
.88
.93
.95
.85
.98
.9
60
75
STR 53 UE
Ir
5 Io
4
.63
.8
3
6
1
.5
x In
1
.5
x In
+
-
2
1.5
+
tr
test
tm
1
.8
x Io
tr 120
60
240
Ir Im I
m .3
s)
.2
x Ir
-8
.9
.88
60
4Im
.93
.95
4
2
1.5
.98
1
.8
x Io
240
60
15
tm .3
2
1.5
(s)
x Ir
75
8
2
1.5
10
.2
.1
.1
0
on
I
0
2
I t off
x In
6
4
3
.3
T
Ih
> 105 %Ir
90
6
6
.2
240
(s) at 1.5 Ir
I
5
3
3
.85
tr 120
30
10
> 105 %I
90
Im
8
x In
.5
.8
.2
th
(s)
x In
.4
1
> Ir
> Im
.4
.3
.3
.2
.2
on
fault
µP
.7
.3
10
11
10
11
test
.6
.4
8
> Ih
.1
.1
2
I t off
.3
.2
short circuit protection
The tripping is :
c time delayed as soon as the
current exceeds the Im threshold.
c instantaneous as soon as the current
exceeds the I threshold.
The ME trip units conform to
IEC 947-4.1 (motor protection).
12
Merlin Gerin
E31303
terminology of the overload and short-circuit protection settings
1
Io x Ir
2
tr
Ic2
Ic1
6
6
adjustable for all modeles
fixed for : TM16D to 250D
STR22SE / 22GE / 22ME, STR23SE, STR25DE, STR35SE / GE / ME
adjustable for : STR43ME, STR53UE, STR45AE / BE, STR55UE
Im
3
fixed for : TM16D ≤ 160 / TM16G to TM63G, STR22ME
adjustable for all other models
fixed for: TM16D to 250D
STR22SE / GE / ME, STR23SE, STR25DE / GE
ON
tm
4
adjustable for : STR45AE / BE
STR35SE / GE, STR43ME, STR53UE, STR55UE
OFF
7
Ih
5
ON
th
OFF
I
adjustable for : STR53UE, STR55UE
8
Long time protection against
overloads
1 Io = coarse adjustment
(function of In)
Ir = fine adjustment
2
tr = long time delay
fixed or adjustable depending
on the trip unit
Short circuit protection
3 Im = short circuit threshold,
I2t curve in position ON or
OFF (depending on the trip
unit)
Merlin Gerin
fixed for : STR22SE / GE / ME,
STR23SE / GE,
STR35SE / GE / ME,
STR43ME
4
tm = short circuit time delay
fixed or adjustable,
Instantaneous protection
5 I = instantaneous threshold,
fixed or adjustable depending
on the trip unit
Earth fault protection
fault threshold,
7 Ih = insulation
I2t curve in position ON or
OFF
8
6
th = earth fault time delay
Ic1 = adjustable load shedding
threshold for STR45, STR53
and STR55
Ic2 = adjustable load shedding
threshold for STR45 and
STR55
13
trip unit settings - general comments
Compact NS100-160-250A
2 interchangeable families
E32522
thermal-magnetic trip unit
440
500/525
660/690
250
Trip unit identification
TM 250 D
65
50
10
85
Ics = 100% Icu
cat A
mini/maxi value of thermal
protection
O
trip unit identification
IEC 947.2
UTE VDE BS CEI UNE NEMA
push
to
trip
Ir Ir
In=160A
Im Im
.85 .9
.95
.8
.7
1 .98
.63 1 .9
4
5
200/250A
69
3
8
.82
1.5 10
x In x 250A
x Ir
90 %Ir
5
105
10
rating
STR 22 SE TM 250 D
alarm
50/60Hz
250A / 40°C
6
test
trip unit rating and reference
temperature
7
8
x 250A
type
D : standard trip unit
G : low magnetic-threshold trip unit
IrIr
magnetic setting (or value
if fixed) for short-circuit
protection
Im
Im
family
TM = thermal-magnetic
MA = magnetic
thermal setting for overload
protection
E32523
electronic trip unit
440
500/525
660/690
250
Trip unit identification
STR 22 SE
65
50
10
85
Ics = 100% Icu
cat A
E : IEC
P : UL
O
IEC 947.2
UTE VDE BS CEI UNE NEMA
trip unit identification
push
to
trip
In=160A
In=100A
STR Im
22 SE
Ir
.85 .9
Io
.9
.8 .8 .95
.7
.7
.63
.63
Ir
Im
1
.98
.5 1
x In
x In
3
4 Ir5
.88
.9
.93
6
.95
2
8
.85
1.5.8 101 .98
x Ir
x Io
40/100
90 %Ir
alarm
105 %Ir
90
105
alarm
short time setting (Im)
for short circuit protection
STR 22 SE
Im
50/60Hz
5
4
6
7
3
8
10
Ir 2 Im
x Ir
+
test
-
test
type
S : selective trip unit
G : generator protection trip unit
M : motor protection trip unit
test connector (see page 31)
alarm (see page 23)
long time setting Io x Ir (LR)
for overload protection
Io : base setting
Ir : fine adjustment
rating group
2 : NS100/160/250
number of settings
family
STR = electronic
trip unit rating
(calculation basis for settings)
14
Merlin Gerin
Compact NS400-630 A
electronic trip unit STR53UE
E32531
trip unit identification
push
to
trip
indication/alarm (see page 23)
160/400A
160/400A
short time setting for
short circuit protection (Im)
STR 53 UE
Io
.63
.8
1
.5
x In
+
tr
test
tm
60
Ir
.88
.93
.95
.85
.98
.9
x Io
240
60
6
3
2
1.5
8
2
1.5
(s)
30
(s) at 1.5 Ir
x Ir
10
.3
x In
.5
8
.4
.7
.3
.8
.2
th
(s)
1
> Im
.3
.2
.2
.2
2
I t off
on
0
> Ir
.4
.3
.1
0
x In
.4
fault
µP
.6
10
11
.1
on
test
Ih
6
.2
240
Ir Im I
I
4
3
tm .3
T
> 105 %Ir
90
5
4
1
.8
tr 120
75
Im
.1
.1
2
I t off
> Ih
instantaneous setting for
short circuit protection (I)
slot for the SD option
"fault indication"
long time setting (LR)
for overload protection
Io : base setting
Ir : fine adjustment
slot for options
"earth-fault" or "load monitoring"
short time time-delay setting (tm)
long time time-delay setting (tr)
test connector (see page 31)
Trip unit identification
STR 53 UE
E : IEC
P : UL
type
S : selective trip unit
U : universal trip unit
M : motor protection trip unit
rating group
3 : NS400/630
number of settings
family
STR = electronic
Merlin Gerin
15
trip unit settings - general comments
C801-1001-1251 A
exclusively electronic
trip unit identification
E32868
indication/alarm (see page 30)
long time setting (LR)
for overload protection
Io : base setting
Ir : fine adjustment
O
short time setting
for short circuit
protection (Im)
STR 55UE
60 70 80 90
105 % Ir
fault
Io
.63
t
.8
Ir
test
Ir
Ic1
.5
4
I
tr
1
.85
.8
Im
Ih
+
tm
th
S
–
30
15
I
C 801 N•H L
C 1001 N•H L
A
10
8
B
15
8
C 1251N•H
10
12
i
–
6
8 3
10
2
B
6 4
2
1.5
xIn
.1 .85
.8
0
0
I2t
off
.4
.3
A
xIr
xIn
.6
.4
.95 .3
.3
.2
.2
1
instantaneous setting for
high short circuit
protection (I)
.5
.2
.4
.2
.1
480
8
.9
.3
.2
.1
on
I2t
adjustment for earth
fault threshold (Ih)
.1
off
Ic1
at 1.5Ir
tr
xIr
.3
240
on
+
T
xIo
120
60
1
Ih
5
5
.95 3
xIn
TFR
Im
.9
tm
th
adjustment for earth fault
time delay (th)
load monitoring
control
adjustment for short circuit
time delay (tm)
adjustment for overload
time delay (tr)
test socket (see page 31)
Trip unit identification
STR
5
5
U
E
standard
E : IEC
P : UL
application
I : isolator
D : distribution
S : selective
G : generator protection
M : motor protection
U : universal
B : selim
circuit breaker
5 : C801/1001/1251
number of settings
family
STR = electronic
16
Merlin Gerin
E33456
trip unit settings - details
thermal-magnetic TM16D to TM250D
t
1
3
1
Ir
Im
10
5
9
1
.8
.9
6
3
7
8
x 250A
TM 250 D
250A / 40°C
x 250A
Ir
Im
E32524
0
Ir
Im
.9
.8
E32525
x 250 A
5
8
7
x 250 A
.9
.8
x 250 A
63
50.4
56.7
63
80
64
72
80
100
80
90
100
125
100
112.5
125
160
128
144
160
200
160
180
200
250
200
225
250
80
100
125
160
200
1000
1200
1400
1600
1800
2000
250
1250
1500
1750
2000
2250
2500
Magnetic short-circuit protection
setting
6
8
0.8
0.9
1
trip unit rating (A)
16
25
40
12.8
20
32
14.4
22.5
36
16
25
40
7
x 250 A
trip unit rating (A)
16
25
40
5
6
7
8
9
10
Im = 250 A x 8 = 2000 A
Merlin Gerin
I
Ir = 250 A x 0.9 = 225 A
5
9
1
setting
6
Im 10
Ir
Im
Thermal overload protection
10
9
1
Ir
63
d
fixe
The circuit breaker trips
instantaneously when the current
exceeds 2000 A.
17
E32563
trip unit settings - details
electronic STR22SE and STR22GE
t
1
1
3
In=100A
STR 22 SE
.8
Ir
Io
.9
.7
.63
Im
Im
.93
.95
4
7
.85
.98
3
8
.5
Ir
3
%Ir
90
105
.88
.9
1
alarm
1
.8
+
-
10
2
x Io
x In
6
5
x Ir
test
0
Ir
Im
I
E32526
electronic trip unit STR22SE and GE rating 40, 100, 160, 250 A
.8
Io
.63
.5
x In
18
Long time overload protection
Im
.88
4
7
.85
.98
3
8
.9
1
.7
Ir
.93
.95
.9
.8
1
x Io
5
2
6
10
x Ir
STR22SE 40 A
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
16
17
17,5
20
21
22
22,5
24
24,5
25,5
27
28
29
30,5
31,5
32
34
35
0.9
18
22,5
25
29
32
36
0.93
185
23
26
29,5
33,5
37
0.95
19
23,5
25,5
30
34
38
0.98
19,5
24,5
27,5
31
35
39
1
20
25
28
32
36
40
STR22SE 100 A
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
40
42,5
44
50,5
53,5
55,5
56
59,5
61,5
64
68
70,5
72
76,5
79
80
85
88
0.9
45
57
63
72
81
90
0.93
46,5
59
65
74,5
83,5
93
0.95
47,5
60
66,5
76
85,5
95
0.98
49
62
68,5
78,5
88
98
1
50
63
70
80
90
100
STR22SE 160 A
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
64
68
70,5
81
86
89
89,5
95
98,5
102,5
109
112,2
115
122,5
127
128
136
141
0.9
72
91
101
115
129,5
144
0.93
74,5
94
104
119
134
149
0.95
76
96
106,5
121,5
137
152
0.98
78,5
99
110
125,5
141
157
1
80
101
112
128
144
160
Merlin Gerin
STR22SE 250 A
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Eg.
In
Ir (fine adjustment)
0.8
0.85
0.88
100
106
110
126
134
138,5
140
149
154
160
170
176
180
191
198
200
212,5
220
0.9
112,5
142
157,5
180
202,5
225
0.93
116
146,5
163
186
209
232,5
0.95
119
150
166
190
214
237,5
0.98
122,5
154
171,5
196
220,5
245
1
125
157,5
175
200
225
250
160 A
Io
0.5 0.63 0.7 0.8 0.9 1
coarse setting 128 A
Ir
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
E32527
Ir = 128 A x 0.9 = 115 A
.8
Io
.9
.9
1
.7
.63
.88
Ir
.93
.95
4
.98
3
.85
.5
x In
.8
1
x Io
5
With an electronic trip unit, the short
circuit threshold is a multiple of the
overload setting.
Short-circuit protection
Im
6
7
8
2
10
x Ir
Eg. In
160 A
Io
0.5 0.63 0.7 0.8 0.9
1
Ir
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
Ir = 128 A x 0.9 = 115 A
Im
2
3
4
5
6
7
8
Im = 115 A x 5 = 575 A
Merlin Gerin
10
The device trips instantaneously when
the current exceeds 575 A.
19
E32565
trip unit settings - details
electronic STR23SE
t
3
1
STR 23 SE
Io
.8 .9
1
.5
.88
.85
.8
Im
.9 .93
.95
.98
1
x In
+
90
105 %Ir
alarm
Ir
.7
.63
1
5
6
4
3
2
x Io
7
8
10
3
x Ir
Ir
-
Im
test
0
Ir
Im
I
E32529
The trip unit rating for the STR23SE and STR53UE is fixed by the current
transformer within the circuit breaker.
8
Io
9
.7
.63
Overload protection
Im
.88
.93
.95
4
7
.85
.98
3
8
.9
1
Ir
.5
1
.8
x In
5
10
2
x Io
6
x Ir
Compact NS400
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
160
170
176
202
214
222
224
238
246
256
272
282
288
306
316
320
340
352
0.9
180
227
252
300
324
360
0.93
186
234
260
298
334
372
0.95
190
239
256
304
342
380
0.98
196
247
274
314
352
392
1
200
252
280
320
360
400
Compact NS630
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
252
268
277
318
337
349
352
374
388
403
428
443
453
481
498
504
535
554
0.9
284
357
396
472
510
567
0.93
293
369
410
469
527
586
0.95
299
377
418
479
538
598
0.98
309
389
432
494
555
617
1
315
397
441
504
567
630
Example of protection settings
Eg.
In
400 A
Io
0.5 0.63 0.7 0.8 0.9 1
coarse setting 320 A
Ir
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
E32530
Ir = 320 A x 0.93 = 298 A
8
Io
9
.7
1
.63
.5
x In
Ir
.88
4
7
.85
.98
3
8
.8
1
x Io
5
2
The short circuit threshold is a multiple
of the overload setting.
Short circuit protection
Im
.93
.95
.9
6
10
x Ir
Eg.
In
400 A
Io
0.5 0.63 0.7 0.8 0.9
Ir
1
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
Ir = 320 A x 0.93 = 298 A
Im
2
3
4
5
6
7
8
10
Im = 298 A x 7 = 2086 A
For a NS400 circuit breaker with 400 A CTs, the
STR23SE trip unit is calibrated at 400 A
20
Merlin Gerin
E32567
trip unit settings - details
electronic STR53UE
t
8
1
3
2
4
5
7
6
1
2
STR 53 UE
Ir
.63
.8
1
.5
x In
.93
.95
.85
.98
.9
tr 120
30
2
1.5
8
2
1.5
.6
.4
.7
10
11
.3
.8
.2
th
(s)
x In
.4
1
.2
.2
2
I t off
on
trip unit adjustment
STR53UE
4
> Im
.1
0
3
> Ir
.4
.3
.1
on
x In
fault
µP
.3
.2
0
(s) at 1.5 Ir
10
.5
test
8
.3
.2
240
15
Ir Im I
6
4
3
(s)
60
test
tm
I
6
x Ir
T
Ih
> 105 %Ir
90
3
tm .3
240
75
5
4
1
.8
x Io
-
+
tr
.88
60
Im
> Ih
5
.1
.1
2
I t off
0
Ir
Im
I
I
Overload protection
Compact NS400
Io (coarse setting)
0.5
0.63
0.8
1
Ir (fine adjustment)
0.8
0.85
0.88
160
170
176
202
214
222
256
272
282
320
340
352
0.9
180
227
300
360
0.93
186
234
298
372
0.95
190
239
304
380
0.98
196
247
314
392
1
200
252
320
400
Compact NS630
Io (coarse setting)
0.5
0.63
0.8
1
Ir (fine adjustment)
0.8
0.85
0.88
252
268
277
318
337
349
403
428
443
504
535
554
0.9
284
357
472
567
0.93
293
369
469
586
0.95
299
377
479
598
0.98
309
389
494
617
1
315
397
504
630
c instantaneous tripping threshold (I);
c overload protection delay (tr);
c short circuit protection delay (tm).
Short circuit time delay
overload time delay
E33465
Trip unit STR53UE provides an even
finer balance between safety and
service continuity for installations with
special characteristics (for example
induction furnaces, fluorescent lighting,
arc-welding systems, SCR-based
regulation systems, etc.), by the use of
three additional settings:
E33478
Io
4
tm
0...0,3 s
0...0,3 s
I2t off
2
tr
15...240 s
tm
on I2t
E32532
Options : see page 23.
Io
.63
Ir
.8
1
.5
x In
Im
.88
.93
.95
.85
.98
.9
.8
1
x Io
4
I
5
4
3
6
3
2
1.5
8
2
1.5
10
x Ir
6
8
10
11
x In
Increased short circuit protection
with the adjustable instantaneous
threshold, I
Eg.
In
I
1.5
The tripping time is faster than that of
the short circuit time delay. The
threshold is a function of the circuit
breaker rating.
400 A
2
3
4
6
8
10 11
I = 400 A x 6 = 2400 A
Merlin Gerin
21
increased setting range with 150 and
250 A CTs
trip unit adjustment
STR23SE
trip unit adjustment
STR53UE
22
Overload protection
NS400 (150 A)
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
60
63,76
66
75,6
80,32
83,16
84
89,25
92,4
96
102
105,6
108
114,75 118,8
120
127,5
132
0.9
67,5
85,05
94,5
138
121,5
135
0.93
69,75
87,88
97,65
111,5
125,55
139,5
0.95
71,25
89,77
99,75
114
128,55
142,5
0.98
73,5
92,61
102,9
117,6
132,5
147
1
75
94,5
105
120
135
150
NS400 (250 A)
Io (coarse setting)
0.5
0.63
0.7
0.8
0.9
1
Ir (fine adjustment)
0.8
0.85
0.88
100
106,25 110
126
133,87 138,6
140
148,75 154
160
170
176
180
191,25 198
200
212,2
220
0.9
112,5
141,75
157,5
180
202,5
225
0.93
116,25
146,57
162,75
185
209,25
232,5
0.95
118,75
149,62
166,25
190
213,75
237,5
0.98
122,5
154,35
171,5
196
220,5
245
1
125
157,6
175
200
225
250
Overload protection
NS400 (150 A)
Io (coarse setting)
0.5
0.63
0.8
1
Ir (fine adjustment)
0.8
0.85
0.88
60
63,76
66
75,6
80,32
83,16
96
102
105,6
120
127,5
132
0.9
67,5
85,05
138
135
0.93
69,75
87,88
111,5
139,5
0.95
71,25
89,77
114
142,5
0.98
73,5
92,61
117,6
147
1
75
94,5
120
150
NS400 (250 A)
Io (coarse setting)
0.5
0.63
0.8
1
Ir (fine adjustment)
0.8
0.85
0.88
100
106,25 110
126
133,87 138,6
160
170
176
200
212,2
220
0.9
112,5
141,75
180
225
0.93
116,25
146,57
185
232,5
0.95
118,75
149,62
190
237,5
0.98
122,5
154,35
196
245
1
125
157,6
200
250
Merlin Gerin
remote indication and electronic trip unit
options STR22SE, STR23SE, STR53UE
indication
E32533
alarm LED
STR 23 SE
alarm
90
105 %Ir
90
105 %Ir
E32534
alarm
60
60
75
STR 53 UE
75
> 105 %Ir
90 > 105 %Ir
90
E26031
options forSTR53UE
test
fault
µP
For Compact NS100/160/250:
STR22SE or STR23SE
The LED lights and remains lit when
the load exceeds 90 % of Ir.
The LED blinks for an overload
(u 105% Ir), warning that the circuit
breaker may trip.
For Compact NS400/630 : STR53UE
The 4 LEDs indicate the load level:
c 60 / 75 / 90 % : the load is high and
care should be taken to ensure that the
105% threshold is not exceeded;
c 105 % : There is an overload and the
unit may trip. Shedding of non-priority
loads.
Option F, fault indication
This option can be fitted to the
STR53UE (Compact NS400 or NS630).
Following a trip, press the fault test
button for an indication of the cause:
c µP : internal microprocessor fault,
c > Ir : overload or circuit breaker
over-temperature,
c > Im : short-circuit (or instantaneous),
c > Ih : earth fault protection.
> Ir
> Im
Example of threshold setting :
E32693
E26030
> Ih
R
6
Ic1
In
0,8...1 Ir
1
400 A
Io
0.5 0.63 0.8
Ic
coarse setting 320 A
.93
.9
.88
.95
.85
.98
Ir
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
Ir = 320 A x 0.93 = 298 A
1
.8
1
Ic
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
Ic = 298 A x 0.95 = 283 A
It is generally used to disconnect nonpriority circuits in the event of an
overload (load shedding).
T
.5
Ih
.6
.4
.7
.3
.8
tripping threshold
adjustment
Ih = 0.2 to 1 x In
E32692
E32691
E26029
load-shedding control - option R
This function allows remote indication
of whether the load is above or below
the threshold, Ic.
7
Ih
0,2...1 In
7
Ih
0,2...1 In
.2 x In 1
th (s) .4
.4
.3
.3
.2
.2
on
.1
.1
2
I t off
tripping time
adjustment
0,1...0,4 s
ON I2t
0,1...0,4 s
I2t OFF
th
8
th 8
Earth fault protection - option T
This function will trip the circuit breaker
in the event of a fault to earth on a TNS
system.
Merlin Gerin
23
E32679
trip unit settings - details
electronic STR25DE
1
3
t
1
STR 25DE
60 70 80 90
t
Ir
test
Ir
I
.9
105 % Ir
4
5
.95 3
.85
.8
I
+
xIo
2
1.5
1
6
xIr
8
10
–
3
i
E33457
0
.9
Ir
4
.95
.85
Compact C801N/H/L
5
6
setting
2
8
Ir (A)
Compact C1001N/H/L
10
1.5
x Io
x Ir
setting
1
1
Ir (A)
Compact C1251N/H/L
setting
E33458
Ir (A)
.9
Ir
4
.95
I
5
3
6
.8
1
x Io
I
Example :
In = 1000 A,
Ir = 800 A
Im = 4000 A
1
In = 800 A
1
0.95
0.9
0.8
0.7
0.63
0.5
0,4
800
760
In = 1000 A
720
640
560
504
400
320
1
0.95
0.9
0.8
0.7
0.63
0.5
0,4
1000
950
In = 1250 A
900
800
700
630
500
400
1
0.95
0.9
0.8
0.7
0.63
0.5
0,4
1250
1187
1125
1000
875
787
625
500
1
In
1000 A
Ir
0.4 0.5 0.63 0.8 0.9 0.95 1
8
2
.85
I
Setting STR25DE
3
1
.8
I
Ir
1.5
Ir = 0,8 x 1000 = 800 A
10
x Ir
3
Im
1.5
2
3
4
5
6
8
10
Im = 5 x Ir = 4000 A
24
Merlin Gerin
E32680
trip unit settings - details
electronic STR25DE (*) (fine adjustment)
1
1
3
t
1
STR 25DE (*)
Io
.63
60 70 80 90
.8
t
Ir
test
Ir
I
.9
105 % Ir
4
5
.95 3
.5
1
.85
.8
xIn
I
+
xIo
1
6
2
1.5
xIr
8
10
–
3
i
0
E33459
(*) fine adjustment
Io
.63
.9
.8
.5
1
Ir
4
.95
.85
5
6
2
8
10
1.5
x Io
x Ir
Compact C801N/H/L
Io
0,5
0,63
0,8
1
1
Ir 1
400
504
640
800
Compact C1001N/H/L 1
Io
0,5
0,63
0,8
1
Ir 1
500
630
800
1000
Compact C1251N/H/L 1
E33460
Io
0,5
0,63
0,8
1
Io
.63
.8
.5
1
x In
.9
Ir
4
.95
I
5
6
3
2
.85
.8
1
x Io
I
Ir 1
625
788
1000
1250
Example :
C1001N : In = 1000 A,
Ir = 720 A,
Im = 3600 A,
In = 800 A
0.975
390
491
624
780
0.95
380
479
608
760
0.925
370
466
592
740
0.9
360
454
576
720
0.875
350
441
560
700
0.85
340
428
544
680
0,8
320
403
512
640
0.925
463
583
740
925
0.9
450
567
720
900
0.875
438
551
700
875
0.85
425
536
680
850
0,8
400
504
640
800
0.925
578
728
925
1156
0.9
563
709
900
1125
0.875
547
689
875
1094
0.85
531
669
850
1063
0,8
500
630
800
1000
In = 1000 A
0.975
488
614
780
975
0.95
475
599
760
950
In = 1250 A
0.975
609
768
975
1219
0.95
594
748
950
1188
In
1
1000 A
Io
0.5 0.63 0.8
1
base setting 800 A
8
1.5
I
Setting STR25DE (*)
3
1
.8
x In
I
Ir
10
x Ir
2
Ir
0.8 0.85 0.875 0.9 0.925 0.95 0.975 1
Ir = 800 x 0,9 = 720 A
3
Im
1.5
2
3
4
5
6
8
10
Im = 720 x 5 = 3600 A
Merlin Gerin
25
E32681
trip unit settings - details
electronic STR35SE/GE
1
1
3
4
t
1
Ir
STR 35SE
Io
60 70 80 90
.63
t
.8
Ir
test
Ir
.5
1
105 % Ir
Im
.9
4
3
5
.95 3
120s
.85
.8
xIn
Im
+
tm
xIo
1
–
6
2
1.5
.3
Im
8
10
.2
4
.1
0
on
0
I2t
off
i
tm
C 1251N•H
12
E33461
0
Io
.63
.9
.8
.5
1
Ir
.85
6
2
1
.8
x In
5
4
3
8
1.5
x Io
10
x Ir
Compact C801N/H/L
Io
0,5
0,63
0,8
1
1
Ir 1
400
504
640
800
Compact C1001N/H/L 1
Io
0,5
0,63
0,8
1
Ir 1
500
630
800
1000
Compact C1251N/H/L 1
E33462
Io
0,5
0,63
0,8
1
Io
.63
.5
.9
.8
1
Ir
Im
4
.95
.85
.8
x In
5
3
6
2
8
1.5
1
x Io
Ir
Im
I
I
Setting STR35SE/GE
Im
.95
1,5...10Ir
.3
.1
A
C 801 N•H L
C 1001 N•H L
A x In
15
8
xIr
.2
I
1,5 Ir
0,4...1In
Ir 1
625
788
1000
1250
Example :
C1001N : In = 1000 A,
Ir = 720 A,
Im = 3600 A,
In = 800 A
0.975
390
491
624
780
0.95
380
479
608
760
0.925
370
466
592
740
0.9
360
454
576
720
0.875
350
441
560
700
0.85
340
428
544
680
0,8
320
403
512
640
0.925
463
583
740
925
0.9
450
567
720
900
0.875
438
551
700
875
0.85
425
536
680
850
0,8
400
504
640
800
0.925
578
728
925
1156
0.9
563
709
900
1125
0.875
547
689
875
1094
0.85
531
669
850
1063
0,8
500
630
800
1000
In = 1000 A
0.975
488
614
780
975
0.95
475
599
760
950
In = 1250 A
0.975
609
768
975
1219
0.95
594
748
950
1188
In
1
Io
2
Ir
1000 A
0.5 0.63 0.8 1
coarse setting 800 A
10
x Ir
0.8 0.85 0.875 0.9 0.925 0.95 0.975 1
Ir = 800 x 0,9 = 720 A
E32690
Short circuit time delay
3
Im
1.5
2
3
4
5
6
8
10
4
Im = 720 x 5 = 3600 A
tm
I2t
0...0,3 s
0...0,3 s
off
tm
on I2t
C801 N/H L
C1001N/H L C1251N/H
A
B
26
10 8
15 8
10
12
Merlin Gerin
E32682
trip unit settings - details
electronic STR45AE
1
2
4
1
3
t
Ir
0,4...1In
1
STR 45AE
60 70 80 90
2
105 % Ir
fault
Io
.63
t
.8
Ir
test
Ir
Ic1
.5
tr
1
.85
.8
Im
Ih
+
tm
th
S
–
Ih
5
C 801N•H C 1001N•H C 1251N•H
23
6
2
1.5
1
.3
240
–
+
T
xIr
480
0
.1 .85
.8
0
.95 .3
off
xIn
.4
.4
xIr
4
.3
.2
1
.2
.1
on
I2t
.1
off
tm
th
18
E33461
0
Io
.63
.9
.8
.5
1
Ir
4
.85
5
3
6
2
1
.8
x In
8
1.5
x Io
10
x Ir
E32689
Overload time delay
Compact C801N/H/L
Io
0,5
0,63
0,8
1
1
Ir 1
400
504
640
800
Compact C1001N/H/L 1
Io
0,5
0,63
0,8
1
2
tr
15...480 s
Ir 1
500
630
800
1000
Compact C1251N/H/L 1
E33462
Io
0,5
0,63
0,8
1
Io
.63
.9
.8
.5
1
Ir
Im
4
.95
.85
.8
x In
5
3
6
2
8
1.5
1
x Io
Ir
Im
I
I
SettingSTR45AE
Im
.95
1,5...10Ir
.6
Ic1
at 1.5Ir
tr
.9
.3
I2t
3 Im
.5
.2
.2
.1
.4
.3
8
10
.2
on
i
A
20
xIo
120
60
30
15
I
A x In
4
.95 3
xIn
TFR
Im
.9
Ir 1
625
788
1000
1250
Example :
C1001N : In = 1000 A,
Ir = 720 A,
Im = 3600 A,
In = 800 A
0.975
390
491
624
780
0.95
380
479
608
760
0.925
370
466
592
740
0.9
360
454
576
720
0.875
350
441
560
700
0.85
340
428
544
680
0,8
320
403
512
640
0.925
463
583
740
925
0.9
450
567
720
900
0.875
438
551
700
875
0.85
425
536
680
850
0,8
400
504
640
800
0.925
578
728
925
1156
0.9
563
709
900
1125
0.875
547
689
875
1094
0.85
531
669
850
1063
0,8
500
630
800
1000
In = 1000 A
0.975
488
614
780
975
0.95
475
599
760
950
In = 1250 A
0.975
609
768
975
1219
0.95
594
748
950
1188
In
1000 A
1
Io
0.5 0.63 0.8 1
coarse setting 800 A
2
Ir
10
x Ir
0.8 0.85 0.875 0.9 0.925 0.95 0.975 1
Ir = 800 x 0,9 = 720 A
Short circuit time delay
E33465
3
Im
1.5
2
3
4
5
6
8
10
4
Im = 720 x 5 = 3600 A
tm
I2t
0...0,3 s
off
0...0,3 s
tm
on I2t
Options : voir page 30
Merlin Gerin
27
E32683
trip unit settings - details
electronic STR45BE
1
2
1
3
4
t
Ir
0,4...1In
1
STR 45BE
Io
60 70 80 90
.63
.8
t
Ir
test
Ir
Im
.9
4
Ih
5
.95 3
.5
1
.85
.8
tr
xIn
Im
Ih
+
tm
th
S
120
60
xIo
240
–
30
15
6
2
1.5
1
.3
T
–
+
T
xIr
8
10
.3
.4
.2
.3
.1
.2
0
0
It
2
off
3 Im
.5
.2
.1
480
.4
.3
.2
on
i
2
105 % Ir
xIn
.4
4
.3
.2
.1
on
.1
It
2
off
at 1.5Ir
tr
tm
th
E33461
0
Io
.63
.9
.8
.5
1
Ir
4
.85
5
Compact C801N/H/L
3
6
2
8
1
.8
x In
1.5
x Io
10
x Ir
Io
0,5
0,63
0,8
1
1
Ir 1
400
504
640
800
Compact C1001N/H/L 1
Overload time delay
E33479
Io
0,5
0,63
0,8
1
2
tr
15...480 s
Ir 1
500
630
800
1000
Compact C1251N/H/L 1
E33462
Io
0,5
0,63
0,8
1
Io
.63
.5
.9
.8
1
Ir
Im
4
.95
.85
.8
x In
5
3
6
2
8
1.5
1
x Io
Ir
Im
I
Setting STR45BE
Im
.95
1,5...10Ir
.6
Ir 1
625
788
1000
1250
Example :
C1001N : In = 1000 A,
Ir = 720 A,
Im = 3600 A,
In = 800 A
0.975
390
491
624
780
0.95
380
479
608
760
0.925
370
466
592
740
0.9
360
454
576
720
0.875
350
441
560
700
0.85
340
428
544
680
0,8
320
403
512
640
0.925
463
583
740
925
0.9
450
567
720
900
0.875
438
551
700
875
0.85
425
536
680
850
0,8
400
504
640
800
0.925
578
728
925
1156
0.9
563
709
900
1125
0.875
547
689
875
1094
0.85
531
669
850
1063
0,8
500
630
800
1000
In = 1000 A
0.975
488
614
780
975
0.95
475
599
760
950
In = 1250 A
0.975
609
768
975
1219
0.95
594
748
950
1188
In
1000 A
1
Io
0.5 0.63 0.8 1
coarse setting 800 A
2
Ir
10
x Ir
0.8 0.85 0.875 0.9 0.925 0.95 0.975 1
Ir = 800 x 0,9 = 720 A
E33466
Short circuit time delay
3
Im
1.5
2
3
4
5
6
8
10
4
Im = 720 x 5 = 3600 A
tm
0...0,3 s
I2t off
tm
0...0,3 s
on I2t
Options : voir page 30
28
Merlin Gerin
E32684
trip unit settings - details
electronic STR55UE
1
2
4
1
3
5
t
1
Ir
STR 55UE
60 70 80 90
0,4...1In
2
105 % Ir
fault
Io
.63
t
.8
Ir
test
Ir
Ic1
.5
4
I
5
.95 3
tr
1
.85
.8
xIn
Im
Ih
+
tm
th
S
–
I
C 801 N•H L
C 1001 N•H L
A
10
8
B
15
8
TFR
Im
.9
C 1251N•H
10
12
–
i
2
1.5
1
120
60
240
30
15
480
xIr
.3
8
0
0
I2t
.1 .85
.8
off
xIn
.4
.1
.1
xIr
4
.3
.2
1
.2
on
I2t
off
Ic1
at 1.5Ir
tm
E33463
.63
Ir
1
4
.9
.8
.5
Im
.95
.85
.8
x In
Compact C801N/H/L
6
5
3
6
4
8
2
8
3
A
1.5
1
x Io
10
2
B
x In
x Ir
E32689
Overload time delay
Io
0,5
0,63
0,8
1
1
Ir 1
400
504
640
800
Compact C1001N/H/L 1
Io
0,5
0,63
0,8
1
2
tr
15...480 s
Ir 1
500
630
800
1000
Compact C1251N/H/L 1
E33464
Io
0,5
0,63
0,8
1
Io
Ir
.63
.8
.5
1
x In
Im
.9
4
.95
.85
I
5
5
6
3
6
4
8
2
8
3
A
1
1.5 10
x Io
x Ir
.8
2
Ir
B
Ir 1
625
788
1000
1250
Example :
C1001N : In = 1000 A,
Ir = 720 A,
Im = 3600 A,
I = 6000 A
0.975
390
491
624
780
I
0.95
380
479
608
760
0.925
370
466
592
740
0.9
360
454
576
720
0.875
350
441
560
700
0.85
340
428
544
680
0,8
320
403
512
640
0.925
463
583
740
925
0.9
450
567
720
900
0.875
438
551
700
875
0.85
425
536
680
850
0,8
400
504
640
800
0.925
578
728
925
1156
0.9
563
709
900
1125
0.875
547
689
875
1094
0.85
531
669
850
1063
0,8
500
630
800
1000
In = 1000 A
0.975
488
614
780
975
0.95
475
599
760
950
In = 1250 A
0.975
609
768
975
1219
0.95
594
748
950
1188
In
1
1000 A
Io
0.5 0.63 0.8
1
coarse setting 800 A
x In
Ir
0.8 0.85 0.875 0.9 0.925 0.95 0.975 1
Ir = 800 x 0,9 = 720 A
3
E32690
I
In = 800 A
Short circuit time delay
Im
1.5
2
4
3
4
5
6
8
10
Im = 720 x 5 = 3600 A
5
tm
Im
Setting STR55UE
I
5
2...A/B x In
5 I
th
0
Io
1,5...10Ir
.6
.4
.95 .3
.2
3 Im
.5
.2
B
.9
.3
.4
.3
A
xIn
.1
tr
Ih
6
8 3
10
2
.2
on
+
T
xIo
5
6 4
0...0,3 s
I
2
3
4
5
6
8
A
B
0...0,3 s
I2t off
tm
I = 6 x In = 6000 A
on I2t
C801 N/H L
C1001N/H L C1251N/H
A
B
10 8
15 8
10
12
Options : voir page 30
Merlin Gerin
29
remote indication and electronic trip unit
options STR45AE/BE, STR55UE
E26031
LED alarme
test
Fault indication - option F
this option is not available on the
STR45BE.
E23534
indication
fault
60
STR 53 UE
µP
60
75
75
> 105 %Ir
90 > 105 %Ir
90
> Ir
> Im
E26030
E32693
STR45AE/BE STR55UE
options
E32694
> Ih
6
Ic1
R
6
0,8...1 Ir
Ic2
0,5...1 Ir
Ic
.93
.9
.88
.95
.85
.98
1
.8
T
.5
Ih
.6
.4
.7
.3
.8
E32692
E23691
E26029
Load shedding control - option R
Ic1 = 0,8 to 1
6
Ic2 = 0,5 to 1
7
Ih
0,2...0,6 In
7
Ih
0,2...0,6 In
.2 x In 1
th (s) .4
.4
.3
.3
.2
.2
on
.1
.1
2
I t off
0,1...0,4 s
ON I2t
0,1...0,4 s
I2t OFF
th
8
th 8
Earth fault protection - option T
earth fault protecyion setting for your
network
7 Ih = 0,2 to 0,6 In
I2t = constant : ON or OFF
8 th = 0,1 to 0,4 s
30
Merlin Gerin
testing of electronic trip units
STR22SE, STR23SE, STR53UE,
STR25DE, STR35SE/GE
STR45AE/BE, STR55UE
testing of electronic trip
units
E23858
mini test kit
A test socket on the front of the
electronic trip units enables connection
to a mini test kit or calibration test kit.
These kits tests trip unit operation and
circuit breaking tripping.
E23857
calibration test kit
MERLIN
Merlin Gerin
GERIN
The calibration test kit checks the
protection systems by measuring the
real tripping times:
c at 1.5 x Ir (overload protection),
c at 1.5 x Ir (short circuit protection),
c at 0.8 x In (earth-fault protection).
This apparatus checks that the trip unit
is operational and that the breaker will
trip.
31
E26985
trip unit settings - details
electronic STR22ME, STR35ME
for motor protection
t
E32564
1
1
2
Ir
In=50A
ImSTR 22 ME
Ir 37.5 40
35.5
42.5
33.5
7,2Ir
45
31.5
u1,05 Ir
3
4
IEC 947.4 / cl.10
7,0s
5
47.5
30
A
50
Ir
13 Ir
test
0
Protection settings (STR22ME)
c overload protection, adjustable
threshold Ir 1 ,
conformes to tripping class 10
according to IEC 947-4-1 2 ;
c protection against single phase
operation : initiates circuit breaker
opening in 3.5 to 6 s ;
c short circuit protection :
v fixed threshold, Im (13 x Ir) 3 ,
v fixed time delay 4.
c instantaneous protection against high
short circuits, fixed threshold
(13 x In) 5 .
trip unit STR22ME
rating(A)
adjustment thresholds (A)
40
24
25.5
27
28.5
50
30
31.5
33.5
35.5
80
48
51
54
57
100
60
63
67
71
150
90
95
101
107
220
132
140
148
157
30
37.5
60
75
113
166
Ir
32
40
64
80
120
177
13Ir
34
42.5
68
85
127
187
36
45
72
90
135
198
I
38
47.5
76
95
142
209
40
50
80
100
150
220
Indication as standard
Indication of load by diode on front
face :
c non operational for I < 1.05 x In ;
c flashes for I u 1.05 x In.
32
Merlin Gerin
E32566
E26987
trip unit settings - details
electronic STR43ME
for motor protection
2
1
t
1
3
2
µP
STR 43 ME
Io
Ir
.8
.7
.88
1
A
+
tr
.90.93
8
.98
11
3
12
7
1
.8
13
6
x Io
tr
-
>Im
9 10
.95
.85
.6
>Ir
Im
4
x Ir
10
5
test
tm
10A
Ir Im I
class
20
7.2 tr
Protection settings (STR43ME)
c overload protection :
v adjustable threshold, Ir 1 ,
v adjustable long time delay 2 ,
conformes to trip unit classes types 5,
10 and 20 according to IEC 947-4.1 ;
c protection against single phase
operation : initiates circuit breaker
opening in 4 s ± 10% ;
c short circuit protection :
v adjustable threshold, Im
(6 to 13 x Ir) 3 ,
v fixed time delay 4 ;
c instantaneous protection against high
short circuits, fixed threshold
(13 x In) 5 .
0
Ir
I
Overload protection settings
Compact NS400
Io (coarse setting)
0.5
0.63
0.7
0.8
Ir (fine adjustment)
0.8
0.85
0.88
160
170
176
202
214
222
224
238
246
256
272
282
0.9
180
227
252
300
0.93
186
234
260
298
0.95
190
239
256
304
0.98
196
247
274
314
1
200
252
280
320
Compact NS630
Io (coarse setting)
0.5
0.63
0.7
0.8
Ir (fine adjustment)
0.8
0.85
0.88
252
268
277
318
337
349
352
374
388
403
428
443
0.9
284
357
396
472
0.93
293
369
410
469
0.95
299
377
418
479
0.98
309
389
432
494
1
315
397
441
504
E32529
Example of protection settings
8
Io
9
.7
.9
1
.63
Ir
.88
.93
.95
4
.98
3
.85
.5
x In
5
1
.8
Eg. In
Im
7
8
13
6
x Io
6
Io
Ir
400 A
0.5 0.63 0.7 0.8 0.9 1
coarse setting 320 A
0.8 0.85 0.88 0.9 0.93 0.95 0.98 1
x Ir
Ir = 320 A x 0.93 = 298 A
Io
8
9
.7
.9
1
.63
.88
Ir
4
.98
3
.85
1
.5
.8
x In
x Io
E33816
Im
.93
.95
5
Im
6
6
7
8
9
10 11 12 13
7
Ir ==320
Im
298AAxx10
0.93==2980
298 A
8
6
13
x Ir
Increased setting range with 150-250 A CTs
Merlin Gerin
NS400 (150 A)
Io (coarse setting)
0.5
0.63
0.7
0.8
Ir (fine adjustment)
0.8
0.85
0.88
60
63,76
66
75,6
80,32
83,16
84
89,25
92,4
96
102
105,6
0.9
67,5
85,05
94,5
138
0.93
69,75
87,88
97,65
111,5
0.95
71,25
89,77
99,75
114
0.98
73,5
92,61
102,9
117,6
1
75
94,5
105
120
NS400 (250 A)
Io (coarse setting)
0.5
0.63
0.7
0.8
Ir (fine adjustment)
0.8
0.85
0.88
100
106,25 110
126
133,87 138,6
140
148,75 154
160
170
176
0.9
112,5
141,75
157,5
180
0.93
116,25
146,57
162,75
185
0.95
118,75
149,62
166,25
190
0.98
122,5
154,35
171,5
196
1
125
157,6
175
200
33
E32685
trip unit settings - details
electronic STR35ME
for motor protection
1
1
3
4
t
OFF
1
STR 35ME
60 70 80 90
on
Io
off
t
1
Ir
test
Ir
.8
105 % Ir
Im
.9
4
5
.95 3
6
3
.63
.5
xIn
120s
off
.85
.8
Im
+
tm
off
–
xIo
2
1.5
1
.3
.1
0
0
It
2
off
i
A
C 801 N•H L
C 1001 N•H L
A x In
15
8
4
.2
.1
on
1,5 Ir
.3
.2
I
LR inopérant
LT inopérative
Ir = In
xIr
8
10
tm
C 1251N•H
12
E33467
0
Io
.9
1
.8
.63
off
.5
Ir
.95
.85
5
3
6
2
1
.8
x In
8
1.5
x Io
10
x Ir
Compact C801N/H/L
Io
0,5
0,63
0,8
1
1
Ir 1
400
504
640
800
Compact C1001N/H/L 1
Io
0,5
0,63
0,8
1
Ir 1
500
630
800
1000
Compact C1251N/H/L 1
E33468
Io
0,5
0,63
0,8
1
Io
.9
1
.8
.63
.5
off
Ir
Im
4
.95
.85
6
2
8
1
1.5 10
x Io
x Ir
.8
x In
5
3
Ir 1
625
788
1000
1250
0.975
390
491
624
780
E32690
I
0.95
380
479
608
760
0.925
370
466
592
740
0.9
360
454
576
720
0.875
350
441
560
700
0.85
340
428
544
680
0,8
320
403
512
640
0.925
463
583
740
925
0.9
450
567
720
900
0.875
438
551
700
875
0.85
425
536
680
850
0,8
400
504
640
800
0.925
578
728
925
1156
0.9
563
709
900
1125
0.875
547
689
875
1094
0.85
531
669
850
1063
0,8
500
630
800
1000
In = 1000 A
0.975
488
614
780
975
0.95
475
599
760
950
In = 1250 A
0.975
609
768
975
1219
Example :
C1001N : In = 1000 A,
Im = 6000 A,
0.95
594
748
950
1188
In
1
Io
1000 A
0.4 0.5 0.63 0.8
1 OFF
pre-rating 1000 A
3
oveload protection inoperative
Im
1.5
2
3
4
5
6
8
10
Im = 6 x In = 6000 A
4
tm
I
In = 800 A
Ir
Short circuit time delay
Im
Settings STR35ME
Im
4
Ir
0...0,3 s
0...0,3 s
I2t off
tm
on I2t
C801 N/H L
C1001N/H L C1251N/H
A
B
34
10 8
15 8
10
12
Merlin Gerin
supplementary functions
Vigi bloc and Visu bloc ........................................................ 36
plug-in base ........................................................................................ 37
withdrawable chassis for Compact NS100 to 630 .............. 38
universal chassis for Compact C801 to 1251 ....................... 39
locking options ................................................................................. 40
locking and lead sealing ............................................................... 41
Merlin Gerin
35
Vigi bloc and Visu bloc
Vigi bloc
E32869
380/415
440
500/525
660/690
250
70
65
50
10
85
Ics = 100% Icu
cat A
O
IEC 947.2
UTE VDE BS CEI UNE NEMA
push
to
trip
In=100A
.8
Io
.63
%Ir
90
105
Im
.88
.93
.95
4
.85
.98
3
.9
1
.5
.8
6
5
1
7
+
-
8
10
2
x Io
x In
Im
alarm
Ir
.9
.7
Ir
40/100
STR 22 SE
x Ir
test
avant test diélectrique
enlever ce couvercle
310
150
60
before dielectric test
remove this cover
R
∆t(ms)
0
vigi MH
3
NS
100/160 NHL
200/440 V - 50/60 Hz
N
1
3
5
2
4
6
I∆n(A)
T
HS 0.03 (∆t = 0)
reset push-button
rating plate
-25
10
1
0.3
vigi
intermediate terminal shield (1)
sealable fixing screw for the intermediate
terminal shield
sealing point for plate blocking access to
the settings
plate blocking access to the settings
test push-button
The Vigi bloc provides residual current
protection against indirect contact and
the risk of fire and destruction due to
faults to earth. It actuates the trip unit
by means of a direct mechanical action.
The Vigi bloc can be fitted with an
alarm contact (SDV) which can be
used to remotely indicate that the
device has tripped due to an earth
fault .
The "Test" push button allows regular
verification that the Vigi bloc is
operational by simulating an earth
fault.
The test cannot be carried out with the
circuit braker in the open position.
The "Reset" push button. After all trips
initiated by the Vigi, this button must be
pressed in order to reset the Vigi.
slot for SDV auxiliary switch (optional)
trip time delay settings (2)
sensitivity settings
(1) The intermediate terminal shield is necessary
in order for the Vigi to function.
(2) When the device is set to 30mA, any time
delay selected is nullified i.e. instantaneous
operation.
E32870
rating plate
avant test diélectrique
enlever ce couvercle
before dielectric test
remove this cover
vigi
type of Vigi module
NS
100/160 NHL
200/525 V - 50/60 Hz
operational voltage and frequency
-25
N
1
3
standardised symbols: (see page 4)
5
T
2
4
6
-25
immunity to current 8/20 wave and electromagnetic environment
class A immunity to DC components
(6 mA insensitivity)
minimum operating temperature as per VDE 664
schematic diagram
The Visu bloc
The standard fixed versions of the
Compact circuit breakers exist in ratings
100 A to 1250 A. A Visu bloc can be
directly connected, which provides
visible break isolation according to
French standard NF C 13.100 : the
contacts are visibles through a
transparent cover, and are operated by
means of a handle.
The Visu bloc is padlockable as
standard with barrel locking optional.
Specific auxiliaries are available for the
Visu bloc : auxiliary contacts, terminal
shields, etc.
The Compact NS100/630 and C801/
1251 can be equiped, as an option, with
a pre-tripping mechanism preventing
the "on-load" opening of the Visu bloc.
36
The Visu bloc must be fitted with a
CAM contact and the circuit breaker
with a voltage release.
Connection
c fixed front connected. The Compact
circuit breakers with Visu bloc are
delivered ready for connection by bars
or cables fitted with lugs (see page ?) ;
c connection of bare cables : upstream
by a set of terminals for the Visu bloc
and downstream a set of teminals for
the Compact;
v accessories : the Visu bloc can be
fitted with terminal spreaders, right
angle terminals, terminal extensions
and lugs.
c fixed rear connected : by adaptation
of the Compact's specific rear
connectors with the Visu bloc, delivered
per pole.
The Compact circuit breakers with Visu
bloc can be fitted with specific short
terminal shields (rear connection) or
standard long terminal shields (front
connection), both of which are lead
sealable
(see page ??).
Accessories
Compact NS100/630 with Visu bloc can
be fitted with :
c in the Visu bloc : auxiliary contacts
(OF, CAM), Ronis or Profalux barrel
locks, a contact to earth the neutral
(obligatory if the tansformer neutral is
earthed downstream of the Compact
with Visu bloc), etc.
c in the Compact NS frame : all the
Compact NS auxiliaries.
Merlin Gerin
E32520
plug-in version
unplugging
E32519
the plug-in circuit breaker
push
to
trip
E32541
1 - open the circuit breaker.
push
to
trip
3 - pull the circuit breaker out
horizontally.
The auxiliary circuits are disconnected
by the automatic auxiliary connector
block located at the back of the device.
push
to
trip
Safety mechanism
If the circuit breaker is closed (I/ON
position) when pulled out, advanced
opening ensures operator safety, i.e.
the poles automatically open before the
power connections are withdrawn.
2 - remove the two fixing screws.
plugging in
1 - open the circuit breaker.
2 - plug the circuit breaker in.
3 - refit the fixing screws.
4 - the circuit breaker is ready for
operation.
degree of protection against
direct contact with the power
circuits
c device plugged in: IP40
(with terminal shields),
c device unplugged: IP20,
c device unplugged and base fitted with
safety shutters: IP40.
Merlin Gerin
37
E32538
chassis mounted plug-in
circuit breaker
E32539
withdrawable chassis for
Compact NS100 to 630
disconnection
CLAC !
CLAC !
push
to
trip
E32540
1 - open the circuit breaker.
push
to
trip
3 - simultaneously pull down on the two
handles until the two locking levers
"clack".
the auxiliary circuits are disconnected
at the same time as the power circuits,
unless the device is equipped with a
manual auxiliary connector (see below).
Advanced opening ensures operator
safety, as with the plug-in version.
push
to
trip
2 - turn the two locking levers.
1 - disconnect the circuit breaker
(as above).
2 - unplug the manual auxiliary
connector (if installed).
3 - turn the two locking levers, as for
disconnection.
4 - push the two handles down.
5 - pull the circuit breaker out forwards.
connection
1 - turn the two locking levers.
2 - simultaneouly push up the two
handles.
Connection of the auxiliary circuits and
circuit breaker advanced opening occur
as for disconnection.
degree of protection with circuit
breaker disconnected or
removed
c no special equipment: IP20,
c base fitted with safety shutters: IP40.
auxiliary circuit test
indication contacts
(optional)
38
E23894
removal
This function is available when the
circuit breaker is equipped with the
manual auxiliary connector. Following
disconnection, the circuit breaker can
be operated (toggle, "push to trip"
button) to check the auxiliary circuits
are still connected.
Changeover contacts:
c "end-of-connection (fully connected)"
contact,
c "end-of-disconnection (fully
withdrawn)" contact.
Merlin Gerin
the withdrawable circuit
breaker and universal
chassis
11
10
9
8
7
1
2
3
4
5
6
1
door interlocking (optional)
2
2 'racked-out' auxiliary contacts
(optional)
3
position indicator
4
locking by 3 padlocks in the 'racked-in'
(or 'racked-out') position
5
racking handle storage
6
locking in the withdrawn (or 'racked-out')
position (optional)
7
racking interlock (optional)
8
2 'racked-in' auxiliary contacts
(optional)
9
extraction operators (1)
The universal chassis for Compact
C801 to C1251 is particularly well
suited to main incoming circuit
breakers :
c racking in and out is possible with the
door closed by means of a racking
handle which is normally stored in the
base of the chassis ;
c 2 positions (racked-in and rackedout) are indicated :
v locally by a position indicator,
v remotely by auxiliary contacts
(2 racked-in contacts and
2 racked-out contacts) ;
c the circuit breaker can be operated
from the exterior of the panel.
Door cut-out
A set of 'surrounds' allow :
c optimises the number of cut-outs :
only 1 cut-out per circuit breaker :
v 3 and 4 poles,
v toggle or direct rotary handle
operated ;
c guarantees a degree of protection to
IP 40.
This set comprises :
c a frame for the chassis front plate,
which gives access to the locking
facilities and racking mechanism
(see below) ;
c a frame for the circuit breaker handle
with window to view trip unit settings.
Locking
A wide range of locking options :
c chassis locking in both the racked-in
and racked-out positions by 3padlocks
and 2 barrel locks, accessable from the
panel exterior ;
c door interlocking, with the breaker
racked-in ;
c can be locked in the racked-in
position with the panel door open.
Fixation
c rear : panel or rail mounted ;
c on a shelf : solid or rails.
Power connections
c by cables with crimped lugs ;
c by flat or edgewise bars.
Auxiliary connections
The standard Compact C withdrawable
terminal block.
frame for chassis
front plate
E33469
E32687
universal chassis for
Compact C801 to 1251
frame for toggle operation with
window to view trip unit settings
frame for rotary handle operation
with window to view trip unit settings
10 connector for withdrawable terminal
block (optional)
11 safety shutters IP 40 (optional)
Door front covers and surrounds
Merlin Gerin
39
locking options
c locking in the OFF/O position
guarantees isolation according to
IEC 947-2.
toggle
function
means
locking device
in position O
locking device
in position O or I
padlock
E23896
E23895
Whatever locking method is chosen,
the circuit breaker will always trip in the
event of a fault.
c each device is able to accept
between 1 and 3 padlocks of diameter
5 to 8 mm.
padlock
accessories
required
removable
lock. device
fixed locking
device
for circuit breaker
NS100…630 C801…C1251
c
c
accessories
required
–
locking device
and
keylock
for circuit breaker
NS100…630 C801…C1251
c
c
c
c
accessories
required
–
for circuit breaker
NS100…630 C801…C1251
c
c
push
to
trip
push
to
trip
E32537
standard direct rotary handle
function
means
locking device
position O
padlock
keylock
function
means
locking device
position O
device in position I :
door opening prevented
door open:
device closing prevented
padlock
rotary handle
(integral)
–
c
function
means
locking in OFF
position O
door opening prevented
device in I position:
door opening prevented
door open: device
closing prevented
padlock
accessories
required
–
for circuit breaker
NS100…630 C801…C1251
c
c
ON
I
ppr
roo
ffa
all
uux
x
O
OFF
MMC type direct rotary handle
extended rotary handle
E23899
motor mechanism
2
keylock
rotary
handle
(integral)
function
means
locking in OFF
position O
motor mechanism
locked out
padlock
keylock
c
–
accessories
required
–
for circuit breaker
NS100…630 C801…C1251
c
c
1 locking
device
c
c
push
to
trip
1
auto
O
u
man
40
push
OFF
I
push
ON
1 - set the selector on the front to the
manual position.
2 - pull the locking lever.
3 - fit the padlock(s).
It is then impossible to actuate the
spring charging lever, the closing pushbutton and the manual/automatic
operation selector.
Merlin Gerin
locking and lead sealing
withdrawable chassis
E23900
function
connection prevented
lock in connected or
disconnected position
means
padlock
keylock
accessories required
–
locking device and
keylock
push
to
trip
seal
E23905
different lead sealing
systems
inhibited operations
front cover fixing screw
c removal of front cover
c access to auxiliaries
E23906
c removal of trip unit
rotary handle
fixing screw
c removal of the rotary handle
c access to auxiliaries
E23907
c removal of trip unit
motor mechanism cover
locking screw
c removal of the motor mechanism
c access to auxiliaries
E23908
c removal of trip unit
transparent protection
plate for trip unit settings
changes in settings:
c for overload protection
E23909
transparent protection
plate for Vigi module
settings
changes in settings for earth fault protection
E23910
c for short-circuit protection
intermediate terminal
shield on Vigi module
c disabling of earth fault
protection function
E23911
c access to power connection
(protection against direct contact)
interlocking
Prevents closing of a circuit breaker
when another is already closed.
Merlin Gerin
terminal shield
fixing screw
function
interlocking of 2 circuit breakers fitted
with toggle
interlocking of 2 circuit breakers fitted
with rotary handle
access to power connections
(protection against direct contact)
means
double-bolt mechanical device
mechanical device
2 keylocks (1 key)
41
42
Merlin Gerin
operational conditions
environmental conditions ............................................................. 44
commissioning and exploitation ............................................... 46
operational anomalies .................................................................... 48
practical advice ................................................................................. 49
Merlin Gerin
43
environmental conditions
ambient temperature
operation
Ambient temperature between –25°C
and +40 °C:
The rated characteristics for Compact
NS circuit breakers are guaranteed if
the temperature of the air immediately
surrounding the device is within the
above range.
Ambient temperature between +40°C
and +70°C :
Take into account the derating
coefficients presented in the technical
documents:
c for circuit breakers with a thermalmagnetic trip unit, there is a natural
drop in the thermal tripping threshold
(overload protection),
c for circuit breakers with an electronic
trip unit, there is a drop in the maximum
setting authorised for overload
protection.
installation is not guaranteed if the
circuit breakers operate at
temperatures greater than 70°C.
Ventilation (natural or forced-air) should
be provided for switchboards to avoid
temperatures greater than 70°C.
storage and commissioning
In their original packing, Compact NS
circuit breakers may be stored at
temperatures ranging from -55°C to
+95°C.
Commissioning should be carried out at
normal ambient temperatures (see
above). However, commissioning may
exceptionally be carried out at an
ambient temperature ranging from
-35°C to -25°C.
Ambient temperature above +70°C:
Various systems trip the circuit breaker
to protect components from the effects
of excessive temperature. It follows that
continuity of service for the electrical
special atmospheric
conditions
vibrations
44
Compact NS circuit breakers operate
within their rated characteristics in all
normal climatic conditions. They have
successfully passed (no drop in rated
characteristics) the tests defined by the
following standards:
c IEC 68-2-2 : dry heat at +85°C,
c IEC 68-2-1 : dry cold at –55°C,
c IEC 68-2-30 : damp heat
(temperature + 55°C, relative humidity
95 %),
c IEC 68-2-11 : salt spray.
Compact NS circuit breakers are
designed to operate in industrial
atmospheres as defined in IEC
standard 947 (pollution degree i 3).
Compact NS circuit breakers are
guaranteed against mechanical or
electromagnetic vibration levels as
specified in the following standards:
c IEC68-2-6,
c Veritas NI122E,
c Lloyd's Register of Shipping,
c JIS 8370.
Excessive vibration may however
provoke untimely tripping, loosening of
connections or even rupture of parts.
It is however advised to ensure that the
circuit breakers are installed in correctly
cooled switchboards without excessive
dust.
Merlin Gerin
altitude
electromagnetic
disturbances
Compact NS circuit breakers are
designed to operate within their rated
characteristics at altitudes up to 2 000
metres.
Above 2 000 m, modifications in the
ambient air characteristics (dielectric
withstand capacity, cooling capacity)
result in the following derating:
altitude (m)
maximum operating voltage(V)
rated thermal current (A) at 40°C
i 2000
690
In
Compact NS circuit breakers equipped
with an electronic trip unit and a Vigi
module are protected against:
c overvoltages produced by
electromagnetic switchgear,
c overvoltages produced by
atmospheric disturbances and
conducted by electrical networks (eg.
lightning strikes),
c devices emitting radio waves (radio
transmitters, walkie-talkies, radar, etc.),
c electrostatic discharges produced
directly by operators.
3000
600
0,96 x In
4000
480
0,93 x In
They pass EMC (electromagnetic
compatibility) tests in compliance with
the following international standards:
c IEC 255-22-1 class 3:
v 10 kV 1.2 / 50 µs overvoltage wave,
v 2.5 kV1 MHz damped oscillatory
wave,
c IEC 1000-4-2 class 4:
electrostatic discharges 15 kV,
c IEC 1000-4-3 class 3:
10 V/m radiated electromagnetec fields,
c IEC 1000-4-4 class 4:
4 kV fast transient waves,
c IEC 1000-4-5 class 4:
v 4 kV 1.2 / 50µs voltage waves,
v 2 kA 8 / 20 µs current waves,
c EN 50081-1 class B:
conducted and radiated emissions in
switchboards,
c IEC 947-2 annex F.
The above tests ensure:
c absence of nuisance tripping,
c overload tripping times.
Merlin Gerin
45
commissioning and exploitation
prior to commissioning
new circuit breakers or
following an extended
shutdown
A general check requires only a few
minutes and eliminates any risks of
incorrect operation due to error or
neglect.
prior to commissioning
periodically during service life
following servicing on the switchboard
periodically during an extended shutdown
following an extended shutdown
A
B
C
D
E
F
electrical tests
switchboard inspection
conformity with diagram
device mounting, connectionsauxiliaries
mechanical operation
All checks must be carried out with
the switchboard de-energised. For
compartmented switchboards, it is
sufficient that all accessible sections
be de-energised.
A
c
B
c
C
c
c
(1)
c
c
c
(2)
D
c
c
c
c
c
E
c
c
c
c
F
c
c
c
G
c
c
c
c
G operation of the electronic trip units
and the Vigi modules.
(1) extended shutdown or modifications in the
switchboard
(2) modification in the switchboard
electrical tests
Insulation and dielectric withstand
capacity tests are carried out prior to
delivery of the switchboard. These tests
are governed by applicable standards
and must always be carried out by an
authorised specialist.
switchboard inspection
Check that the circuit breakers are
installed in a clean environment, free of
dust and all installation debris (tools,
wiring, chips, metal particles, etc.).
compliance with diagram
Check the conformity of devices with
the installation diagram:
v ratings and breaking capacities
indicated on the rating plates,
v trip unit identification (type, rating),
v presence of additional functions (Vigi
earth fault protection, motor
mechanism, rotary handle, auxiliaries,
indication and measurement modules),
v protection settings (overload, shortcircuit, earth fault),
v outgoing circuit identification on the
front of devices,
v for Vigicompact earth fault protection
circuit breakers, check that the
intermediate terminal shield is installed,
otherwise the earth fault protection
function is inoperative.
device mountingstatus of connections and
auxiliaries
Check device mounting in the
switchboard and the tightness of power
connection.
Check that auxiliaries and
accessories are correctly installed:
v motor mechanism modules or rotary
handles,
v accessories (terminal shields, door
escutcheons, etc.),
v connection of auxiliary circuits.
mechanical operation
Check the mechanical operation of
devices:
v contact opening,
v contact closing,
v tripping using the "push to trip".
operation of the electronic trip
units and the Vigi modules
Check the electronic trip units using
the mini test kit or calibration test kit
(see page 13).
46
Check the Vigi modules using the test
button on the front plate. This test
guarantees tripping in the event of an
earth fault.
Merlin Gerin
following tripping
trip indication
Tripping is indicated on the front:
by the toggle
by the motor mechanism
E32883
E32882
E32881
by the rotary handle
O
discharged
OFF
ON (closed)
ON (closed)
ON
I
tripped
2
push
to
trip
tripped
OFF (open/
isolated)
push
to
trip
push
to
trip
O
OFF
1
/auto
manu
O
OFF
push
I
push
ON
OFF (open/
isolated)
identifying causes
A circuit breaker must NEVER be
reset before identifying and
eliminating the cause of the trip.
toggle
rotary handle
E32884
When the lever is in the "tripped"
position, the device must first be reset
by setting the lever to the O/OFF
position before reclosing (ON position).
c depending on the cause of the trip
and prior to restarting the installation,
certain precautions must be taken,
namely insulation and dielectric tests
on the installation, in part or in whole.
These checks and tests must be
carried out by qualified personnel.
E32506
circuit breaker reset
Causes may be multiple:
c depending on how the circuit breaker
is fitted out, certain auxiliaries (SD,
SDE, SDV, etc.) or LED indications on
the trip unit are important means in
identifying the cause of the trip (see
table page ??),
ON "I" closing
ON
tripped
push
to
trip
OFF "O"
reset
ON
I
tripped
push
to
trip
O
OFF
closing
OFF
reset
motor mechanism
See page ?? for the applicable
procedure.
Merlin Gerin
47
operational anomalies
The table below does not list all
possibilities, but can nonetheless assist
in troubleshooting and providing
corrective action.
problems
If however, the problem persists,
consult the Merlin Gerin after-sales
support department.
indication
probable cause
corrective action
SD
SDE
"alarm"
on electronic
trip units
c protection settings are incorrect.
check the rated current of the supply
network and set the proper value.
check the setting for overload protection.
SD
c supply voltage for the undervoltage
release (MN) is too low or subject to
major fluctuations.
check the value of the power supply voltage
and correct it.
repeated tripping
(DC networks are subject to major voltage
fluctuations when loads are turned on.
Voltage drops may provoke tripping on the
circuit breaker by the MN release.
SD
c inadvertent powering of MX shunt
release.
determine the causes of the powering.
SD
SDE
c ambient temperature too high.
ventilate the room or the device.
SD
SDE
SDV
c Vigi module settings are incorrect.
c insulation fault.
check the insulation of the protected circuit.
SD
SDE
c supply network is faulty.
identify and eliminate the fault.
SD
c MX shunt release is supplied with power.
determne the causes of the supply
of power.
c MN undervoltage relese is not supplied
with power.
check for power across the terminals and
that connections are correct.
OF
c circuit breaker is interlocked.
check the installation diagram and
the interlocking system (electrical or
mechanical) of the two circuit breakers.
OF
c closing order inoperative.
c check that the selector on the front
is in the automatic position.
c check the power supply for the motor
mechanism module, the motor and the
closing signals.
SDE
SD
c the device tripped due on an electrical
fault.
c identify and eliminate the fault.
c manually charge the motor mechanism
module spring.
circuit breaker does not close
manual operation
motor mechanism
48
Merlin Gerin
practical advice
Due to their design and characteristics,
Compact NS circuit breakers require
no maintenance.
It is nonetheless recommended to
ensure that devices operate in the
conditions specified in the catalogue,
namely:
c electrical and mechanical conditions,
c environmental conditions (see pages
44 and 45).
improved safety
The following options are available:
c long or short terminal shields
providing IP 40 protection,
c a sealable plate to block access to
settings (thermal-magnetic trip units),
c flexible phase barriers to improve
insulation between power connections,
c toggle cover to ensure IP 43
protection.
The base (plug-in configuration) can be
fitted with:
c shutters to block access to power
parts (IP 4x protection).
c a full range of electrical indication
auxiliaries (OF, SD, SDE, SDV),
c indication of voltage presence
across device terminals,
c current measurement module with
an incorporated ammeter or remote
indication of the measured value,
c load-circuit identification means
(see Telemecanique catalogue,
catalogue number AB1),
c alarm indications (standard on
devices equipped with electronic trip
units).
c indication options on trip unit
STR53UE (see page 12),
c Dialpact indication, measurement
and control modules.
E32885
maintaining performance
levels of circuit breakers
push
to
trip
E32886
improved comfort
push
to
trip
E32887
improved aesthetics
c a range of escutcheons providing
different protection (IP) levels for fixed
devices, plug-in and withdrawable
configutations, motor mechanism
modules and rotary handles.
push
to
trip
Merlin Gerin
49
notes
50
Merlin Gerin
Merlin Gerin
51
notes
52
Merlin Gerin
postal address
38050 Grenoble cedex 9
France
tel: (33) 04 76 57 60 60
As standards, specifications and designs change from time to time, please ask for confirmation
of the information given in this publication.
this document has been
printed on ecological paper.
Publishing: Schneider Electric SA
Design, production: AMEG SA
Printing: Color Press Annecy
ART 073432
07-96
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