Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Scope of functions
Scope of functions
(see also page 9, applications)
87
87
50
87H
87H
50N
51
87N
50
51
*
*
49
49
7UT512
* Note: With 60 Hz only for
two–winding differential
function
7UT513
Fig. 1
7UT51 differential protection relays
Application
The 7UT512/7UT513 differential protection relays are used for fast and selective
isolation of short-circuits in transformers
of all voltage levels and also in rotating
electric machines and short lines. The
particular application can be chosen by
setting. In this way an optimal adaptation
of the relay to the protected object can
be achieved. The protection relay can be
parameterized for use with three–phase
and single–phase transformers. In addition to this, a thermal replica is integrated
for the supervision of the ohmic losses in
the plant. Two variants of the differential
relay can be supplied:
The device 7UT512 with a compact design is suited for two–winding transformers as well as for motors or generators
and short lines. A standby overcurrent–
time protection and two thermal monitoring functions are also integrated.
The larger 7UT513 unit is used for two–
winding and three–winding transformers,
generators/motors and short two–end
and three–end lines. Two thermal monitoring functions are integrated as additional functions. Moreover, as an alternative a standby definite–time/inverse–time
overcurrent or a restricted earth fault
(REF) or a tank protection function is
available for one winding. The 7UT513
can also be used where the neutral point
current of the transformer must be acquired or more inputs and outputs are required than are provided by the 7UT512.
The device can interface with conventional control systems or alternatively be
integrated in the modern SINAUT LSA
substation control system.
Siemens LSA 2.2.4 . May 1996
Construction
Within its compact construction, the
device contains all the components
required for capture and evaluation of
measurands, operator panel and display
field, alarm and command outputs, binary
inputs, serial interfaces and power supply
converter.
The device can be supplied in three case
variations. The model for panel surface
mounting is supplied with two–tier terminals accessible from the front. The variants for panel flush mounting or cubicle
mounting have rear connection terminals
and are available with or without glass
cover.
Mode of operation
The 7UT51 differential protection units
have a complete, digital analog value processing function ranging from sampling
and digitizing the analog values to operating decisions for the circuit–breaker. Digital techniques in the measurement process extensively suppress the influence
of switching currents (inrushs), high–frequency transients, transient DC current
components and varying degrees of CT
saturation.
Features
Short–circuit protection for two and
three–winding transformers with integrated vector group and ratio adaptation. Restraint during inrush, overexcitation and CT–saturation.
Short–circuit protection for generators
and motors with high setting
sensitivity
Overload protection with a thermal
characteristic for 2 windings/2 terminations
Two–stage definite–time/inverse–time
overcurrent standby protection for one
winding. On the basis of the 7UT513
hardware, a restricted earth fault
protection or a sensitive, definite time
overcurrent for one starpoint (tank
protection) is available as an alternative.
Direct injection of two external open
commands.
Marshallable binary inputs, LEDs,
alarm and tripping relays.
Operational current measurement.
Realtime clock and permanently stored
operational and fault indications in the
event of auxiliary voltage failure. Previous substation control interface
(Siemens–specific) or IEC 870–5–103
VDEW interface (standard of the
Association of German Power Utilities)
up to 8 faults to the substation control
and protection.
Fault recording
Commissioning aid.
Serial interfaces
The device has two serial interfaces.
The operator interface for the connection
of an AT–compatible PC is arranged at
the front. An operator program DIGSI is
available for comfortable and easy setting, fault recording, evaluation and commissioning. On software version V3 and
higher of the 7UT51, the unit can be operated via the substation control interface
using the DIGSI V3 operating program.
Siemens AG 19961
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
The substation control interface is a
820 nm fibre–optic interface for connecting to the SINAUT LSA substation protection system or other substation control
system with IEC 870–5–103 standard
interface. Alternatively this can be an isolated V.24/V.28 interface (RS 232C) (protocol either Siemens–specific or according to IEC–870–5–103 recommendation.
KnlW1
Differential protection for transformers
When the 7UT51 is employed as fast and
selective short–circuit protection for two
respectively three–winding transformers
the following properties apply:
Tripping characteristic according to
Fig. 3
Vector group and ratio adaptation
Depending on the treatment of the
transformer neutral point, neutral current elimination can be with or without
consideration of the neutral current.
With the 7UT513, the neutral current
at the neutral CT can be measured and
considered in the treatment of this current, which increases sensitivity by
one third for single–pole faults.
Fast clearance of heavy internal transformer faults.
Restrain of inrush current with 2nd
harmonic. Cross–block function that
can be limited in time.
Restrain against over fluxing with a
choice of 3rd or 5th harmonic stabilization is only active up to a settable
value for the 50 Hz component of the
differential current.
Additional restrain for an external fault
with current transformer saturation
(CT–saturation detector).
Insensitivity to DC current elements
and current transformer faults due to
the freely programmable response
characteristic.
The differential protection function can
be externally blocked by means of a
binary input.
2
yn0
KnlW2
d5
KnlW3
L2
L3
Settings
All setting parameters can be input by
means of the integrated operator panel
and display field or a PC under user control. The parameters are stored in a non–
volatile memory, so that they cannot get
lost even during interruption of the supply
voltage.
Self monitoring
Hardware and software are monitored
continuously and any irregularities are
immediately detected and alarmed. As a
result, the security, reliability and availability are significantly improved.
YN
L1
Overload
protection 1
Overcurrent–
time protection, definite/
inverse
Overload
protection 2
Restricted
earth–fault
protection REF
Tank protection
Transformer
differential
protection
Commissioning test
7UT513
Fig. 2
Functions of the differential protection (DMT or REF)
Differential quantity
IDIFF Fundamental component of the differential current
IRest Restrain current (bias current)
Rated current of the transformer, generator or line
IN
DIFF
N
5
Fault characteristic
with single–end infeed
4
Trip
3
m2
2
DIFF Setting value
1
1
N
m1
Restrain
0,5
0,15
Rest
FP
1
2
3
4
5
6
7
8
9
10
N
Restrain quantity
Fig. 3
Response characteristic with preset transformer parameters for two–phase faults
Differential protection for generators/
motors
When the 7UT51 is employed as fast and
selective short–circuit protection for generators or motors the following properties apply:
Tripping characteristic according to
Fig. 3
Short response times within one
system cycle.
Monitoring of the incoming lines for
wire break (for short lines).
Additional restrain for external faults
with current transformer saturation.
Commissioning aids
The resolution of the display of the operational, restrain and differential currents is
selected such that commissioning is possible using the low–voltage method without additional measuring instruments.
In addition to the absolute value of the
operational currents, the phase angle of
the currents between the windings is
also displayed. Moreover, the protection
function calculates the values of the differential and restrain current.
Siemens LSA 2.2.4 . May 1996
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Thermal overload protection
The thermal replica evaluates the largest
phase current of a selectable set of CT
secondary currents. The tripping characteristics (Fig. 4) are exponential functions
according to IEC 255–8 standards and
take into account the 2R losses due to
the particular operational current and the
simultaneous cooling due to the coolant.
In this way the tripping time during an
overload condition takes the pre–load into
consideration. An alarm stage can be set
to operate before reaching the tripping
condition.
Backup overcurrent–time protection
for one winding or one end
As backup protection, overcurrent–time
protection with a choice of definite–time
or inverse–time characteristic is available. The definite–time and inverse–time
protection has two stages, i.e. there is
not only an overcurrent stage (I>) but
also a high current stage (Iơ). Both
stages can be blocked via the binary input. The response value of the standby
protection is derived from the measured
phase currents for one winding or one
end.
Restricted earth fault protection (REF)
Restricted earth fault protection (REF) is
used with earth transformer windings or
coil arrangements with a common neutral
point. The winding can be more sensitively protected by the measuring principle than by differential protection because the sum of the phase currents is
compared with the measured zero current. For example, the interturn fault
against earth, which is hardly noticeable
in the differential current, can frequently
be detected by the REF. With this
method, the absolute value and phase
angle of the fundamental of the zero current is compared with the absolute value
and phase angle of the sum of the line
currents. This results in a high degree of
stability during equalization processes.
Tank protection monitors the current between earth and transformer tank
mounted in an isolated fashion with a
sensitive input winding. The response
value can be set in a milliampere range.
One of these functions can be set in the
7UT513 as an alternative to the standby
protection. The sensitive measuring input
of the tank protection is an ordering option (2 in the 13th position of the order
number).
Note: For 60 Hz and three winding differential protection the REF and tank protection cannot be used parallel to the differential protection.
t (min)
t (min)
Parameters
setting value
time constant (min)
100
100
50
50
20
20
10
10
5
5
3
3
2
100
2
1
50
1
0.5
0.5
0.3
0.3
0.2
100
0.2
10
0.1
Parameters
setting value
time constant (min)
50
0.1
5
0.05
0.05
0,5
0,5 1
1
5
10
0.03
0.03
1
I
k @ IN
2
3 4 5
8 10
Without previous load
1
2
3 4 5
8 10
With 90 % previous load
I
k @ IN
Fig. 4
Thermal overload trip–time characteristic
I 0Ȁ
I EDS
I1
I2
4
limit =
130
120
110
100
I3
90
I0 ’
3
I0” = I1 + I2 + I3
2
Block
Trip
1
130
120
110
100
90
80
70
60
IREF Response value
( I0”; I0’ )
Fig. 5
Tripping characteristic as a function of the phase angle between I0” and I0 ’ at I0 ” = I0 ’
(180 = external fault)
Siemens LSA 2.2.4 . May 1996
3
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Marshallable event/alarm relays, LEDs,
binary inputs
To enable user specific indication and/or
output of alarms these are supplied fully
marshallable. Individual events can be
grouped together to form a group alarm.
Indications
The 7UT51 provides detailed data for the
analysis of faults and to check states during operations. All indications subsequently listed are backed up in the event
of a supply voltage failure.
Clock time
The standard version contains a battery–backed clock that can be synchronized via the binary input or the
substation control interface. A date
and time are assigned to all indications
with millisecond resolution.
Fault indications
The last three fault indications are
available for the faults stored in the
unit.
Operational indications
All indications that are not directly
associated with the fault are stored in
the operational indication buffer.
Fault recording
The sampling values of the currents
measured at the transformer are stored if
a fault occurs. It is also possible to initiate fault recording on energization so
that, for example, an inrush current can
be recorded during commissioning. The
current can be transferred to a PC or read
out via the SINAUT LSA substation control and protection. If the IEC 870–5–103
standard interface is used, up to eight
fault recordings can be stored. The fault
recording buffer is a ring buffer with a
maximum length. The oldest fault being
overwritten by each new fault.
Coupling of external binary signals
For the processing of external signals or
commands such as reverse interlocking,
Buchholz alarm, temperature limit monitoring, tank pressure switch etc. The
associated events/alarms can be transmitted via the serial system interface to
a central device such as for example a
SINAUT LSA or a central data protection
device via alarm or tripping relays and
LED’s for local indication.
Technical data
Input circuits
Rated current N
1 or 5 A (commutable, for mixed 1 A/5 A
primary CTs order a 5 A relay)
Rated frequency fN, can be parameterized
Overload capability current inputs,
thermal
50, 60 or 16 23 Hz
dynamic
Burden current inputs
DC voltage supply
continuous
10 s
1s
half cycle
at N = 1 A
at N = 5 A
Rated auxiliary voltage Vaux
Permissible rated auxiliary voltage ranges
Permissible max. ripple
Power consumption of 7UT512
of 7UT513
at rated auxiliary voltage
quiescent
energized
quiescent
energized
Stored energy time at Vaux w110 V
24, 48 V or
60, 110, 125 V or
220, 250 V
19 to 56 V
48 to 144 V
176 to 288 V
v12 %
approx. 9 W
approx. 11 W
approx. 10 W
approx. 15 W
v50 ms
Binary inputs
7UT512
7UT513
DC operating voltage
Current input
Alarm contacts
Number of malfunction alarm relays not marshallable
Number of alarm relays
7UT512
marshallable
7UT513
marshallable
Contacts per relay
Switching capacity make/break
Switching voltage
Permissible current
1
Ready for operation
Internal fault
Marshallable LEDs
7UT512
7UT513
green
red
1
1
red
red
6
14
LED displays
4
marshallable
marshallable
4 x N
30 x N
100 x N
250 x N
<0.1 VA
<0.5 VA
2
5
24 to 250 V
approx. 2.5 mA
4
10
see connection diagrams
20 W/VA
250 V AC/DC
1A
Siemens LSA 2.2.4 . May 1996
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Technical data (continued)
Trip contacts
Number of trip relays
7UT512
7UT513
Contacts per relay
Switching capacity
Switching voltage
Permissible current
Serial interfaces
marshallable
marshallable
make
break
continuous
0.5 s
Operator interface
Substation control interface
Protocol
Safety
Transfer speed
Type of transfer
Connection
electric
or connection
distance
fibre optic
optical wave length
permissible fibre damping
distance
Construction
Housing, dimensions
Weight, terminals 7UT512
panel flush mounting/
cubicle mounting
7UT512
panel surface mounting
7UT513
panel surface mounting
cubicle mounting
7UT513
panel surface mounting
Degree of protection according to EN 60 529
2
5
see connection diagrams
1 000 W/VA
30 W/VA
250 V AC/DC
5A
30 A
on the front, not isolated, for connection to
an AT compatible PC
isolated, for connection to a central unit
Siemens–specific or according to
IEC 870–5–103 (standard)
Hamming distance d = 4
4 800, 9 600 or 19 200 bauds
asynchronous
similar to V.24/V.28 to CCITT or RS232C to
EIA, 2 kV isolated
max. 1 000 m
two integrated FSMA plug connectors for
fibre optic connection
820 nm
max. 8 dB for glass fibre
62.5/125 mm
max. 2 km
7XP20, see dimension drawings
approx. 6.5 kg, see connection diagrams
approx. 8 kg, 60 terminals
approx. 10 kg, see connection diagrams
approx. 11.5 kg, 100 terminals
IP 51
CE–conformity, standards
This product is in conformity with the directive of the Council of
the European Communities on the approximation of the laws of
the Member States relating to the electromagnetic compatibility
(EMC Council Directive 89/336/EEC).
The product conforms with the international standard IEC 255 and
the national standard DIN VDE 57 435 /part 303.
The relay is designed for use in an industrial environment, for
installation in standard relay rooms and compartments such that
with proper installation electro–magnetic compatibility (EMC) is
ensured.
Conformity is proved by tests performed
by Siemens AG in line with article 10 of the
Council Directive in accordance with the
generic standards EN 50081–2 and
EN 50082–2.
Insulation tests
IEC 255–5, DIN VDE 0435 part 303
High voltage test (routine test), all circuits except d.c. voltage
supply input
High voltage test (routine test), only d.c. voltage supply input
Impulse voltage test (type test), all circuits, class III
2 kV (rms), 50 Hz
High frequency
IEC 255–22–1, class III
Electrostatic discharge
IEC 255–22–2, class III and EN 61000–4–2, class III
Radio–frequency electromagnetic field, non–modulated
IEC 255–22–3 (report), class III
Radio–frequency electromagnetic field, amplitude modulated
ENV 50140, class III
Radio–frequency electromagnetic field, puls modulated
ENV 5014 / ENV 50204, class III
Fast transients
IEC 255–22–4 and EN 61000–4–4, class III
2,5 kV (peak), 1 MHz, = 15 ms,
400 shots/s, duration 2 s
4 / 6 kV contact discharge, 8 kV air discharge, both polarities, 150 pF, Rl = 330 W
10 V/m, 27 to 500 MHz
EMC–tests; immunity
(type test)
Standards: IEC 255–22 (product norm)
EN 50082–2 (generic standard)
DIN VDE 0435 part 303
Conducted disturbances induced by radio–frequency fields,
amplitude modulated
ENV 50141, class III
Power frequency magnetic field
EN 61000–4–8, class IV
Siemens LSA 2.2.4 . May 1996
2,8 kV DC
5 kV (peak), 1,2/50 ms, 0,5 J,
3 positive and 3 negative shots at intervals
of 5 s
10 V/m, 80 to 1 000 MHz, AM 80 %, 1 kHz
10 V/m, 900 MHz, repetition frequency
200 Hz, duty cycle 50 %
2 kV, 5/50 ns, 5 kHz, burst length = 15 ms,
repetition rate 300 ms, both polarities,
Rl = 50 W, duration 1 min
10 V, 150 kHz to 80 MHz, AM 80 %, 1 kHz
30 A /m, continuous, 300 A /m for 3 s, 50 Hz
5
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Technical data (continued)
EMC–tests; emission
(typ tests)
Standard: EN 50081–2 (generic standard)
Climatic stress tests
Conducted interference voltage, auxiliary voltage
CISPR 11, EN 55011, class A and
DIN VDE 0875 part 11, class A
Interference field strength
CISPR 11, EN 55011, class A and
DIN VDE 0875 part 11, class A
150 kHz to 30 MHz
permissible ambient temperature
during service
during storage
during transport
–5 to +55 °C
–25 to +55 °C
–25 to +70 °C
mean value per year v75 % relative humidity, on 30 days per year up to 95 % relative humidity, condensation not permissible
during service
10 to 60 Hz, 0,035 mm amplitude
60 to 500 Hz, 0,5 g acceleration
5 to 8 Hz, 7,5 mm amplitude
8 to 500 Hz, 2 g acceleration
30 to 1 000 MHz
permissible humidity
Mechanical stress tests
IEC 255–21–1, IEC 68–2
permissible mechanical stress
during transport
Differential protection for transformers
Setting ranges
Differential current IDIFF>/IN
High current DIFFơ/N
Inrush stabilization 2fN/fN
Overexcitation stabilization 5fN/fN
Response times (single–sided infeed)
at DIFF w1.5 x set value DIFF>
at DIFF = 1.5 x set value DIFFơ
at DIFF = 5 x set value DIFFơ
Additional time delay for tripping
Reset time
Drop–out to pick–up ratio
Tolerances
Tripping characteristic
Inrush stabilization
Additional time delay
Frequency range
Accuracy
Differential protection for transformers
generators, motors and short lines
Overload protection
Setting range
Differential current DIFF>/N
Response times (single–sided infeed)
at DIFF w1.5 x set value DIFF>
at DIFF = 5 x set value DIFF>
Reset time
Drop–out to pick–up ratio
Tolerances tripping characteristic
Frequency range
Accuracy at 0.8 to 1.2 fN
Accuracy at 0.5 to 0.8 or
1.2 to 1.4 fN
Setting ranges
Factor k acc. to IEC 255.8
Time constant t
Temperature alarm stage QAlarm/QOff
Current dependent alarm stage Alarm
Thermal image
Drop–out to pick–up ratio
Tolerances
Frequency range
Accuracy
Overcurrent–time protection, setting
ranges
Overcurrent–time protection,
definite time
6
High set current phase ơ
Overcurrent phase >
Delay times t>, t ơ
Tolerances
Current pick–up value
Time
Release value times
Steps 0.01
Steps 0.1
Steps 1 %
Steps 1 %
0.15 to 2
0.8 to 20
10 to 80 %
10 to 80 % (alternatively with 3rd or 4th harmonic)
at 16 2/3; 50; 60 Hz
at 16 2/3; 50; 60 Hz
at 16 2/3; 50; 60 Hz
Steps 0.01
approx. 85; 35; 35 ms
approx. 55; 25; 25 ms
approx. 25; 17; 16 ms
0 to 60 ms
approx. 100 ms
approx. 0.7
"3 % of specified value for <5 N
"3 % of set value
"1 % or 10 ms
0.95 vf/fN v1.05
v1 % of tripping characteristic
Steps 0.01
at 16
at 16
2/ ;
3
2/ ;
3
50; 60 Hz
50; 60 Hz
0.05 to 1
approx. 70; 25; 25
approx. 25; 17; 15 to 17 ms
approx. 100 ms
approx. 0.7
"3 % of specified value for <5 N
0.5 vf/fN v1.4
v3 % of tripping characteristic
v30 % of tripping characteristic
Steps 0.01
Steps 0.1 min
Trip temperature
0.1 to 4
0.5 to 999.9 min
70 to 100 %
Alarm wmax = k N
t + tIn
2 – 2pre
2
–(k @ N) 2
Q/QAlarm approx. 0.99
Q/QOff approx. 0.99
/Alarm approx. 0.99
Class 5 % acc. to IEC
0.95 vf/fN v1.05
v1 % of tripping characteristic
/N = 0.1 to 30
/N = 0.1 to 30
0 to 32 s or inactive
" 3% of the setting value
" 1% or " 10 ms
approx. 35 ms
Siemens LSA 2.2.4 . May 1996
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Technical data (continued)
Overcurrent–time protection, setting
ranges (continued)
Overcurrent–time protection,
inverse time
Setting ranges
Restricted earth–fault protection
Tank protection (normal)
sensitive one stage definite time
overcurrent for on star–point CT)
p/N = 0.1 to 20
0.5 to 32 s
1.1 x p
Overcurrent phase
Time multiplier tp
Energization threshold
Characteristics according to IEC 255–4, Section 3.5.2 or BS142
Linear measuring range
Tolerances
Energization threshold
Timing
40 x N
" 5%
" 5% for 2 (/p) <20 and tp = 1
30 ms
Response value REF/N
Phase angle
Response time for 5 x REF
REF = 0.05 to 2
90 to 135 in steps of 10
approx. 25; 17 ms
Response value
Sensitive, normal input transformer >
Response time for 5 x response value
Delay time tI >
at 50; 60 Hz
at 16 2/3; 50, 60 Hz
10 to 1000 mA; 0.1 to 10 x N
approx. 25; 20; 20 ms
0 to 60 s
Note: For three winding differential protection the REF and tank
protection do not work parallel to differential protection
Measuring transducer/operational
measurement
Load currents
primary
secondary
tertiary with 7UT513
Measuring range
Tolerance
Overload protection values
Winding temperature
Measuring range
Tolerance
Fault logging
Storage
Fault recording
on the high–voltage side
on the low–voltage side
tertiary (for 7UT513)
Max. storage time
at 16 2/3; 50; 60 Hz
Time resolution of the
Instantaneous values
at 16 2/3; 50; 60 Hz
Siemens LSA 2.2.4 . May 1996
L1; L2; L3
L1; L2; L3
L1; L2; L3, E1, E2
0 to 240 % N
v2 % of rated value
/Off calculated
0 to 240 %
v3 % referred to Off
Up to last 8 faults
L1; L2; L3
L1; L2; L3
L1; L2; L3 E1. E2
15; 5; 4.1 s
5; 1.66; 1.39 ms
7
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Selection and ordering data
Order No.
7UT51 – B 1 – A 0
7UT512/513 differential protection relay
Application for
Two–winding transformer or machine or short two–end line
Two–winding/three–winding transformer or machine or short two–/three–line
2
3
Rated current at 50/60 Hz AC, 16 2/3
1A
5A
1
5
Rated auxiliary voltage
24, 48 V DC
60, 110, 125 V DC
220, 250 V DC
2
4
5
Construction
For panel flush mounting or cubicle mounting
For panel surface mounting
For panel flush mounting or cubicle mounting, without glass cover
C
D
E
Country–specific presetting
German/English, 50 Hz (switchable for each parameter to 16 2/3 and 60 Hz)
0
Additional functions
Overcurrent–time protection, two overload functions (standard on 7UT512)
Overcurrent–time protection or restricted earth–fault protection, two overload functions
(standard on 7UT513)
Overcurrent–time protection (phase) or normal/sensitive overcurrent (earth), two times overload protection
(one sensitive measuring input for 7UT513)
0
1
2
Serial system interface
Without
Electric according RS 232
Fibre optic interface (820 nm)
A
B
C
Operating program DIGSI 1)
DIGSI Version V3 for Windows, full version for 10 PC’s and update for 3 years,
German
English
7XS5020–0AA00
7XS5020–1AA00
DIGSI Version V3 for Windows, demo–/testversion,
German
English
7XS5021–0AA00
7XS5021–1AA00
Documentation
English:
Catalog LSA 2.2.4: 7UT512/513 (V3) Differential protection relay for transformers, generators, motors
and short lines
Manual: 7UT512/513 (V3) Numerical differential protection for transformers, generators, motors and
short lines
E50001–K5722–A141–A2–7600
C53000–G1176–C99–2
German: Katalogblatt LSA 2.2.4: Differentialschutz 7UT512/513 (Version V3) für Transformatoren, Generatoren,
Motoren und kurze Leitungen
Handbuch: Digitaler Differentialschutz 7UT512/513 (Version V3) für Transformatoren, Generatoren,
Motoren und kurze Leitungen
E50001–K5722–A141–A2
Spanish
E50001–K5722–A141–A2–7800
Catálogo LSA 2.2.4: Protección diferencial 7UT512/513 (version V3) para transformadores,
generadores, motores y líneas cortas
C53000–G1100–C99–2
1) German and English available, other languages on request.
8
Siemens LSA 2.2.4 . May 1996
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
7UT512xx–xxBx–0xA0
Transformer
CT1
Short line
Generator/motor
CT2
G/M
87T
87 G/M
50/51
49
87L
50/51
49
49
50/51
49
49
49
Note:
(50/51) and (49) can freely be assigned to CT1 or CT2 of protected device. The 7UT512 selects the appropriate set of measured currents for each
protection function depending on the above assignment.
7UT513xx–xxBx–1xA0
Transformer
CT1
Transformer
CT2
CT2
87N
CT3
87T
50/51
Short line
CT1
CT1
CT3
CT3
87T
49
49
CT2
87L
49
50/51
49
49
49
(50/51) and (49) can freely be assigned to
CT1, CT2 or CT3.
(87N) and (49) can freely be assigned to
CT1, CT2 or CT3.
(50/51) and (49) can freely be assigned
to CT1, CT2 or CT3.
7UT513xx–xxBx–2xA0
Transformer
CT1
CT2
50N
CT3
49
49
Thermal relay
50/51 Two step time overcurrent relay
87T
49
(50N) is available as normal/sensitive function.
49 can freely be assigned to CT1, CT2 or CT3.
50N
Tank protection as single step definite time
overcurrent relay (optional sensitive)
87N
Restricted earth fault protection
87T
Transformer differential relay
Fig. 6
Applications
Siemens LSA 2.2.4 . May 1996
9
10
L2
L1
L3
L3
N
L1
L2
L3
L1
L2
L3
Side 2
N
G
N
Side 1
N
L3
L1
L2
L3
L2
L1
L2
L3
L1
Binary input, alarm relays,
command relays and LEDs are
marshallable
L2
L1
N
L3
Power supply
MR
RxD
I >> blocking
(definite/inverse time)
LED Reset
Exciter
L2
L1
N
L3
L2
L1
3B2
2B1
2B2
1B1
1B2
20
18
21
19
22
16
32
31
4B1
10
L+
L–11
4A2
4A
4A1
4B2
8A4
8A3
36
35
8A2
33
8A1
3B1
17
34
1A2
2A2
1A1
5
3
6
3A2
2A1
3A1
4
2
1
Command relay 2
Link with the central equipment either
fibre–optic or V.24 interface (RS 232C)
2–kV–isolated
Binary input 2
Binary input 1
7UT512
Command relay 1
Malfunction alarm
relay
Alarm relay 4
Alarm relay 3
Alarm relay 2
Alarm relay 1
Version for panel flush mounting/cubicle mounting
Version for panel surface mounting
4A4
4A
4A3
5B1
5B3
5B4
5B2
5A1
5A3
5A4
5A2
7B1
8B1
6B1
7B2
8B2
6B2
7B3
8B3
6B3
7B4
8B4
6B4
6A3
6A1
6A2
47
46
MT
TxD
12
27
28 General trip
13
14
29
30 General trip
15
44
Backup general trip
43
57
56 Fault indications of the device
55
60
59
Device operative
58
45
39
38
37 Device general trip
42
41 Trip command
40 DIFF > and DIFF >>
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Fig. 7
Connection diagram for 7UT512 differential protection relay, with overcurrent standby and two overload functions
Siemens LSA 2.2.4 . May 1996
Siemens LSA 2.2.4 . May 1996
Side 2
L1 L2 L3
L1
L2
L3
N
L1
L2
L3
N
Side 3
N
L1
L2
L3
N
i E2
i E1
L3
L2
L1
N
L3
L2
L1
N
L3
L2
L1
MR
RxD
Buchholz indication
Buchholz warning
3A2
2A1
2A2
1A1
1A2
3B1
4
2
5
3
6
7
2C2
1C1
30
28
31
29
26
52
51
4A1
4A
4A2
4B2
4B1
15
L+
L– 16
7D1
62
7D2
8D4
8D3
59
60
58
8D2
8A4
8D1
55
57
8A3
8A2
8A1
2D2
1D2
2D1
56
53
54
34
14
33
1C2
1D1
3D2
2C1
27
32
13
1B2
3D1
12
11 2B2
9 1B1
10 3B2
8 2B1
3A1
1
Command
relay 1
Alarm relay 5
Alarm relay 10
Alarm relay 9
Alarm relay 8
Command
relay 5
Command
relay 4
Command
relay 3
Link with the central equipment either
fibre–optic or V.24 interface (RS 232C)
2–kV–isolated
Binary input 5
Binary input 4
Command
Binary input 3 relay 2
Binary input 2
Binary input 1
7UT513
Alarm relay 7
Alarm relay 6
Malfunction
alarm relay
Alarm relay 4
Alarm relay 3
Alarm relay 2
Alarm relay 1
Version for panel flush mounting/cubicle mounting
Version for panel surface mounting
61
User defined indication
I >> blocking
(definite/inverse time)
LED Reset
Power supply
Binary inputs, alarm relays, command relays
LEDs can be marshalled
L1 L2 L3
Side 1
L1 L2 L3
65
64
63
68
67
66
71
70
69
86
85
84
88
Device operative
Fault indications of the device
Backup general trip
Trip command
I DIFF> andI DIFF >>
Device general trip
43
19
18
17
74
99
100
75
72
97
98
73
20
22
23
21
24
44
General trip
General trip
General trip
Buchholz indication
Buchholz warning
96
95 Tank protection trip command
91 Thermal warning stage overload 1, 2
94
93 Restricted earth fault trip command
4A3 76
4A
4A4 77
MT
TxD
5D2 25 General trip
5D3 49
General trip
5D4 50
7D3
6A3
6A1
6A2
5B1
5B3
5B4
5B2
5A1
5A3
5A4
5A2
6D1
6D3
6D4
6D2
5D1
4C1
4C4
4C2
4C3
3C4
3C2
3C3
7D4
4D3 89 Overload trip 1, 2
3C1 92
4D1 87
4D4 90
7B1
8B1
6B1
7B2
8B2
6B2
7B3
8B3
6B3
7B4
8B4
6B4
4D2
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Fig. 8
Connection diagram for 7UT513 differential protection relay with overcurrent standby and two overload functions
11
Differential Relays
7UT512/513 differential protection relay (Version V3) for transformers, generators, motors and short lines
Version for panel surface mounting
Version for panel flush mounting/cubicle mounting
L1
L2 L3
L1
L1
L2
L3
L2
L3
N
N
Restricted earth–fault
protection
E2
Tank protection
1
4
7
6
3
4
7
10
3
11
12
27
30
28
31
20
32
13
14
33
34
3A1
3A2
2A1
2A2
1A1
1A2
3B1
3B2
2B1
2B2
1B1
1B2
3D1
3D2
2C1
2C2
1C1
1C2
1D1
1D2
2D1
2D2
IL1 Winding1
7B1
8B1
6B1
7B2
8B2
6B2
7B3
8B3
6B3
7B4
8B4
6B4
4D2
Alarm relay 1
IL2 Winding 1
Alarm relay 2
IL3 Winding 1
IL1 Winding 2
IL2 Winding 2
IL3 Winding 2
IL1 Winding 3
Alarm relay 3
Alarm relay 4
Malfunction
alarm relay
IE2
Alarm relay 8
IE1
Alarm relay 10
Alarm relay 11
Binary input 1
Command relay 1
55 3A4
Connection of the restricted earth fault
protection is freely allocable to side 1,
side 2 or side 3.
For ordering with normal/sensitive overcurrent earth (Pos. 13 = 2) E2 is the sensitive input (also as tank protection).
For ordering with REF or overcurrent
(Pos. 13 = 1) both inputs E1, E2 are normal inputs.
Power supply
Fibre optic
Binary input 2
57 8D2
58 8D1
Command relay 2
Binary input 3
59 8D4
60 8D3
Binary input 4
Command relay 3
61 7D2
62 7D1
Binary input 5
15 4B1
L+
+12 V
4B5
16 4B2
L–
–12 V
4B4
81 4A1
4A
82 4A2
Fault indications
of the device
5D3 49
5D4 50 General trip
Alarm relay 7
53 3A2
56 3A3
Standby general trip
Command relay 5
IL3 Winding 3
Alarm relay 9
54 3A1
Trip command
I DIFF> andI DIFF>>
Command relay 4
Alarm relay 6
E1
Device general trip
Device operative
4D1 87 (not marshallable)
4D4 90
4D3 89 Overload trip 1, 2
3C1 92
Thermal warning stage
4C1 91 overload 1, 2
4C4 94
4C2 93
Restricted earth fault
4C3
trip command
3C4 96
3C2 95 Tank protection trip
3C3
command
7D4 44
7D3 43 Buchholz warning
6A3 19
6A1 18 Buchholz indication
6A2 17
5B1 74
5B3 99
5B4 100 General trip
5B2 75
5A1 72
5A3 97
5A4 98 General trip
5A2 73
6D1 20
6D3 22
6D4 23 General trip
6D2 21
5D1 24
5D2 25 General trip
IL2 Winding 3
7UT513
65
64
63
68
67
66
71
70
69
86
85
84
88
76
4A
77
V.24 interface (RS 232 C)
Fibre–optic interface
Connection for the LSA
4A3
4A4
TxD–K
Fibre optic
MT
26
SV
Connection of the restricted earth–fault
protection can be parameterized for different winding.
Fig. 9
Connection diagram for 7UT513 differential protection relay with restricted earth fault protection (low impedance) or sensitive/normal overcurrent (earth)
12
Siemens LSA 2.2.4 . May 1996
Differential Relays
Dimension drawings in mm
145
172
29.5
131.5
105
7.3
13.2
5.4
30
Diam. 5
or M4
255.8
Fibre optic
connection
245
266
244
10
1.5
Diam. 6
150
146
231,5
Front view
Side view
Panel cutout
Fig. 10
7UT512 with housing 7XP2030–2 (for panel flush mounting or cubicle mounting)
30
172
29.5
206.5
180
7.3
13.2
5.4
220
255.8
245
244
266
Diam. 5
or M4
Fibre
optic
connection
1.5
10
Diam. 6
225
231.5
221
Front view
Side view
Panel cutout
Fig. 11
7UT513 with housing 7XP2040–2 (for panel flush mounting or cubicle mounting)
234
31
46
159
.....
.....
27
7.5
45
60
51
76
.....
.....
29.5
75
100
266
40
344
280
344
280
Cutout 20 x 60
(without paint)
1.5
39
Detail Z:
1
16
.....
.....
144
15
30
1
26
.....
.....
219
7UT512 (7XP2030–1)
7UT513 (7XP2040–1)
Front view
Side view
25
50
Z
71
260
Side view
Fibre optic
interface
Fig. 12
7UT512/513 for panel surface mounting
Siemens LSA 2.2.4 . May 1996
13
Differential Relays
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the date of delivery.
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A 9.91 a
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Export and re–export are therefore
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All product designations used are trademarks or product names of Siemens AG
or of other suppliers.
permissible without the approval of the
relevant authorities except where current
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Subject to change.
Relevant are the criteria stated in the
delivery note and in the invoice.
An export licence may be required due
to country–specific application of the
product.
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All dimensions in this catalog are given in
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Responsible for
Technical contents: Norbert Schuster,
Siemens AG, EV S V13, Nürnberg
General editing: Roland Reichel/Claudia Kühn–Sutiono,
Siemens AG, EV S SUP22, Nürnberg/EV BK2, Erlangen
Bereich
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Siemens
Aktiengesellschaft
Power
Transmission
and Distribution
Order No.: E50001-K5722–A141-A2–7600
Siemens LSA 2.2.4 . May 1996
Printed in the Federal Republic of Germany
KG K 0696 3.0 SC 14 En