3UA Thermally Delayed Overload Relays
CLASS 10
Technical data
according to IEC 60 947-4-1
General data
Type
3UA60 01- . ./
3UA61 01-..
3UA62 01-..
3UA66
3UA68
Trip class
10
10
10 A
10 A
Phase failure sensitivity by
differential shutter
yes
Adjustable to automatic reset
yes
RESET button with trip-free feature
yes
STOP button
yes
Test function
yes
no
integrated
Accessories
Permissible ambient temperature
°C
–20 to +60
–25 to +55
Shock resistance
g/ms
8/10
Rated insulation voltage Ui
(pollution degree 3)
V
1000
Rated impulse withstand voltage
kV
8
Sealable cover
Main circuit
DC, AC up to 400 Hz
Type of current, frequency range
AC 50 to 400 Hz
Current setting range
(≤ 200 A / > 200 A )
Conductor cross-sections
Terminal screw
mm2
Solid or stranded
Finely stranded with end sleeve
mm2
Flat bars
mm
Tightening torque
Nm
lb. in
M6
2 x 25 to 70
M8
2 x 50 to 120
M 8/M 10
185/240
M 10
2x240
25 to 50
–
25 to 95
20 x 3
–
20x3/2x30x5
–
2x30x5
6 to 8
52 to 60
10 to 14
89 to 124
10 to 14
89 to 124/
14 to 24
124 to 210
14 to 24
124 to 210
Nm
lb. in
Power losses per conducting path (max.)
• at lowest value of setting range
W
5
5
4 (5)
6 (9)
• at highest value of setting range
W
7
8
10 (12)
15 (22)
Typical tripping characteristics
1 2 0
1 0 0
A N S 2 -5 6 8 0 b
5 0
2 0
m in
Tripping curve 3 is applicable to
3-pole loads and curve 2 to 2pole loads. For single-pole
loads, the tripping curves lie between curves 2 and 3. For normal operation, all 3 bimetallic
strips of the overload relay must
be heated. The 3UA overload
relays are suitable for protecting motors with phase control.
For protecting single-phase or
DC-loads, therefore, all three
main conducting paths must be
connected in series. Tripping
curve 3 is then applicable. The
release current with a 3-pole
symmetrical load is between
105 % and 120 % of the set current.
T r ip p in g tim e
Tripping characteristics
The current-time curves show
the relationship between the
tripping time from cold state
and multiples of the set current
IE. When the relay is at operating temperature and carrying
1.0 × IE, the tripping times are
reduced to approximately 25 %.
s
T
1 0
5
2
5 0
3
1
2 0
2
1 0
5
2
5
1
2
1 0 x IE
T r ip p in g c u r r e n t ( a v e r a g e )
3UA Thermally Delayed Overload Relays
CLASS 10
Technical data
according to IEC 60 947-4-1
Auxiliary circuit
Type
3UA60 01- . ./
Auxiliary contacts
1 NO + 1 NC
Conductor cross-sections
Terminal screw
Solid or stranded
Finely stranded with end sleeve
Tightening torque
Rated insulation voltage Ui
(pollution degree 3)
NS1-5329
• NC
• NO and NC connected as
changeover contact
NS1-5331
NS1-5330
• NO and NC
with unequal potential
Rated impulse
withstand voltage Uimp
3UA61 01-..
3UA62 01-..
3UA66
3UA68
mm2
mm2
Nm
lb. in
M3
2 x (0.5 to 1.5); 2 x (0.75 to 2.5)
2 x (0.5 to 1.5); 2 x (0.75 to 2.5)
0.8 to 1.2
7 to 10.3
M 3.5
2 x (0.5 to 1); 2 x (1 to 2.5)
2 x (0.5 to 1); 2 x (0.75 to 2.5)
0.8 to 1.4
7 to 12
V
690
-
V
-
690
V
-
400
V
-
690
kV
6
A
A
A
A
A
A
A
4
3
1.5
0.6
-
2
1.5
1.25
1.15
1.1
1
0.8
A
A
A
A
A
A
A
2.2
1.5
0.8
0.6
-
2
1.5
1.25
1.15
1.1
1
0.8
A
A
A
A
1
0.15
0.1
2
0.5
0.3
0.2
A
6
yes
A
A
A
6
10
6
3
AC V
-
400
Switching capacity
NC at AC. AC-14/AC-15
NO at AC. AC-14/AC-15
NC/NO at DC, DC-13
Conventional thermal current Ith
Contact reliability
Short-circuit protection
Fuse links
Miniature circuit-breaker
• Rated operational current Ie at Ue:
- 24 V
- 60 V
- 125 V
- 230 V
- 400 V
- 500 V
- 600 V
- 690 V
Rated operational current Ie at Ue:
- 24 V
- 60 V
- 125 V
- 230 V
- 400 V
- 500 V
- 600 V
- 690 V
Rated operational current Ie at Ue:
- 24 V
- 60 V
- 110 V
- 220 V
Suitable for PLC; 17 V, 5 mA
Utilization category
gL/gG
fast
C-characteristics
s-, u-, U-ratings
Rated voltage
B 600, R 300
Switching capacity
Box terminal block for installing as a single unit
Type
3UX1 424
For overload relays
3UA60
Conductor cross-sections
Terminal screw
Solid or stranded
Finely stranded with end sleeve
mm2
mm2
Trip classes of thermal, delayed magnetic or
solid-state overload relays – excerpt from IEC 60947-4-1
Trip class
10A
10
20
30
Tripping time tA in seconds
at 7.2 x Ie from cold state
2 < tA ≤ 10
4 < tA ≤ 10
6 < tA ≤ 20
9 < tA ≤ 30
M6
2x25 to 70
2x25 to 50
630
3UA Thermally Delayed Overload Relays
CLASS 10
Technical data according to IEC 60 947-4-1
and DIN VDE 0660 Part 102
Short-circuit protection with fuses for motor feeders
with short-circuit currents up to 50 kA at 690 V1), 50/60 Hz
Overload relays
Type
Setting range
A
Permissible short-circuit fuses for motor starters
consisting of overload relay and contactor, contactor assembly
Fuse links
NH
Type 3NA
NH
DIAZED
Type 5SB
Type 3ND
NEOZED
Type 5SE
Utilization category
Utilization category
gL/gG
aM
Type of
coordination 2)
“1”
A
“2”
A
Type of
coordination 2)
“2”
A
u-listed
fuses
CLASS R K5
British
standards
fuses
BS 88 Type T
Type of
coordination 2)
“1”
A
“2”
A
A
3UA60, 3UA61, 3UA62 thermal overload relays
55 to 80
63 to 90
80 to 110
90 to 120
110 to 135
120 to 150
135 to 160
150 to 180
170 to 205
400
400
400
400
400
400
400
400
400
160
160
200
224
224
250
250
250
250
100
100
125
125
160
160
160
200
200
315
315
315
315
315
315
355
355
355
160
160
160
200
200
250
250
250
315
125
200
250
315
400
630
630
355
355
500
500
800
800
1000
224
224
355
400
450
500
500
300
350
400
450
500
600
600
700
800
3UA66, 3UA68 thermal overload relays
80 to 125
125 to 200
160 to 250
200 to 320
250 to 400
320 to 500
400 to 630
355
355
500
500
800
800
1000
224
224
400
400
500
500
500
(630) 3)
1) Voltage tolerance +5%.
2) Coordination of short-circuit equipment according to IEC 60947-4-1/DIN VDE 0660 Part 102:
Type of coordination “1”: The contactor or starter must not endanger persons or the installation
in the event of a short-circuit. They do not need to be suitable for further
operation without repair and the renewal of parts.
Type of coordination “2”: The contactor or starter must not endanger persons or the installation
in the event of a short-circuit and must be suitable for further use.
There is a danger of contact welding.
3) Applies to 3TB contactors.
300
300
300
300
400
400
1200
CLASS L