5 Overcurrent Protection / 7SJ600

SIPROTEC 7SJ600
Numerical Overcurrent, Motor and Overload Protection Relay
Function overview

Feeder protection
Overcurrent-time protection
Earth-fault protection
Overload protection
Negative-sequence protection
Cold load pickup
Auto-reclosure
Trip circuit supervision

LSP2001-afpen.tif

Motor protection
Starting time supervision
Locked rotor
Control functions

Commands for control of a circuitFig. 5/19 SIPROTEC 7SJ600

numerical overcurrent, motor and overload protection relay

breaker
Control via keyboard,
DIGSI 4 or SCADA system
Measuring functions
Operational measured values I

Description
The SIPROTEC 7SJ600 is a numerical
overcurrent relay which, in addition to its
primary use in radial distribution networks
and motor protection, can also be employed as backup for feeder, transformer
and generator differential protection.
The SIPROTEC 7SJ600 provides definite-time and inverse-time overcurrent
protection along with overload and negative-sequence protection for a very comprehensive relay package. In this way,
equipment such as motors can be protected against asymmetric and excessive
loading. Asymmetric short-circuits with
currents that can be smaller than the largest possible load currents or phase interruptions are reliably detected.

Siemens SIP 2008

Monitoring functions
Fault event logging with time stamp

(buffered)
8 oscillographic fault records

Continuous self-monitoring
Communication
Via personal computer and DIGSI 3 or
DIGSI 4 ( 4.3)
Via RS232 RS485 converter
Via modem
IEC 60870-5-103 protocol, 2 kV-isolated
RS485 interface
Hardware
3 current transformers
3 binary inputs
3 output relays
1 live status contact

5/19

5 Overcurrent Protection / 7SJ600

Application
Wide range of applications
The SIPROTEC 7SJ600 is a numerical
overcurrent relay which, in addition to its
primary use in radial distribution networks
and motor protection, can also be employed as backup for feeder, transformer
and generator differential protection.

The SIPROTEC 7SJ600 provides definite-time and inverse-time overcurrent

protection along with overload and negative-sequence protection for a very comprehensive relay package. In this way,
equipment such as motors can be protected against asymmetric and excessive
loading. Asymmetric short-circuits with
currents that can be smaller than the largest possible load currents or phase interruptions are reliably detected.

Fig. 5/20 Function diagram

The integrated control function allows

simple control of a circuit-breaker or
disconnector (electrically operated/motorized switch) via the integrated HMI,
DIGSI 3 or DIGSI 4 ( 4.3) or SCADA
(IEC 60870-5-103 protocol).

ANSI

IEC

Protection functions

50, 50N

I>, I>>, I>>>

IE>, IE>>

Definite time-overcurrent protection (phase/neutral)

51, 51N

Ip, IEp

79

5/20

Inverse time-overcurrent protection (phase/neutral)

Auto-reclosure

46

I2>

Phase-balance current protection

(negative-sequence protection)

49

>

Thermal overload protection

48

Starting time supervision

74TC

Trip circuit supervision breaker control

Siemens SIP 2008

5 Overcurrent Protection / 7SJ600

Protection functions

Construction
The relay contains all the components
needed for
Acquisition and evaluation of measured
values
Operation and display
Output of signals and trip commands
Input and evaluation of binary signals
SCADA interface (RS485)
Power supply.
The rated CT currents applied to the
SIPROTEC 7SJ600 can be 1 or 5 A.
This is selectable via a jumper inside the relay.

Definite-time characteristics
The definite-time overcurrent function is
based on phase-selective measurement of
the three phase currents and/or earth current.
Optionally, the earth (ground) current IE
(Gnd) is calculated or measured from the
three line currents IL1(IA), IL2(IB) and
IL3(IC).

The definite-time overcurrent protection

for the 3 phase currents has a low-set
overcurrent element (I>), a high-set
overcurrent element (I>>) and a high-set
instantaneous-tripping element (I>>>).
Intentional trip delays can be parameterized from 0.00 to 60.00 seconds for the
low-set and high-set overcurrent
elements. The instantaneous zone I>>>
trips without any intentional delay. The
definite-time overcurrent protection for
the earth (ground) current has a low-set
overcurrent element (IE>) and a high-set
overcurrent element (IE>>).
Intentional trip delays can be parameterized from 0.00 to 60.00 seconds.

Two different housings are available. The

flush-mounting/cubicle-mounting version
has terminals accessible from the rear. The
surface-mounting version has terminals
accessible from the front.

Fig. 5/22 Definite-time overcurrent characteristic

Inverse-time characteristics
LSP2002-afpen.tif

In addition, invese-time overcurrent protection characteristics (IDMTL) can be activated.

Fig. 5/21
Rear view of flush-mounting housing

Fig. 5/23
Inverse-time overcurrent characteristic

Available inverse-time characteristic

Characteristics acc.to

ANSI / IEEE

IEC 60255-3

Inverse

Short inverse
Long inverse
Moderately inverse
Very inverse
Extremely inverse
Definite inverse
I squared T

Siemens SIP 2008

5/21

5 Overcurrent Protection / 7SJ600

Thermal overload protection (ANSI 49)

Protection functions
Thermal overload protection (ANSI 49)
The thermal overload protection function
provides tripping or alarming based on a
thermal model calculated from phase
currents.
Thermal overload protection without
preload
For thermal overload protection without
consideration of the preload current, the
following tripping characteristic applies
only when
I 1.1 IL

For different thermal time constants TL,

the tripping time t is calculated in accordance with the following equation:
t=

35
2

I
1
IL

TL

I2 = Pickup current
TL = Time multiplier
The reset threshold is above 1.03125 I/IN
Thermal overload protection with preload
The thermal overload protection with consideration of preload current constantly
updates the thermal model calculation regardless of the magnitude of the phase currents. The tripping time t is calculated in
accordance with the following tripping
characteristic (complete memory in accordance with IEC 60255-8).
2

Negative-sequence protection (I2>>,

I2>/ANSI 46 Unbalanced-load protection)
The negative-sequence protection (see Fig.
5/24) detects a phase failure or load unbalance due to network asymmetry. Interruptions, short-circuits or crossed connections
to the current transformers are detected.
Furthermore, low level single-phase and
two-phase short-circuits (such as faults beyond a transformer) as well as phase interruptions can be detected.

I = Load current

t = ln

Fig. 5/24 Tripping characteristic of the negative-sequence protection function

I
I pre

k IN
k IN

1
k IN

= Tripping time after beginning of

the thermal overload

Ipre
TL
I
k

= 35.5 TL
= Pre-load current
= Time multiplier
= Load current
= k factor (in accordance with
IEC 60255-8)
ln = Natural logarithm
IN = Rated (nominal) current

Cold load pickup

By means of a binary input which can be
wired from a manual close contact, it is
possible to switch the overcurrent pickup
settings to less sensitive settings for a programmable duration of time. After the set
time has expired, the pickup settings automatically return to their original setting.
This can compensate for initial inrush
when energizing a circuit without compromising the sensitivity of the overcurrent elements during steady state conditions.

This function is especially useful for motors since negative sequence currents cause
impermissible overheating of the rotor.

3-pole multishot auto-reclosure

(AR, ANSI 79)

In order to detect the unbalanced load, the

ratio of negative phase-sequence current to
rated current is evaluated.

Auto-reclosure (AR) enables 3-phase

auto-reclosing of a feeder which has previously been disconnected by timeovercurrent protection.

I2 = Negative-sequence current
T12 = Tripping time

Transformer protection
The high-set element permits current coordination where the overcurrent element
functions as a backup for the lower-level
protection relays, and the overload function protects the transformer from thermal
overload. Low-current single-phase faults
on the low voltage side that result in negative phase-sequence current on the highvoltage side can be detected with the negative-sequence protection.

Trip circuit supervision

(ANSI 74TC)
One or two binary inputs can be used for
the trip circuit monitoring.
Control
The relay permits circuit-breakers to be
opened and closed without command feedback. The circuit-breaker/disconnector may
be controlled by DIGSI, or by the integrated
HMI, or by the LSA/SCADA equipment
connected to the interface.

For further details please refer to

part 2 Overview.

5/22

Siemens SIP 2008

5 Overcurrent Protection / 7SJ600

Protection functions
Switch-onto-fault protection
If switched onto a fault, instantaneous tripping can be effected. If the internal control
function is used (local or via serial interface), the manual closing function is available without any additional wiring. If the
control switch is connected to a circuit-breaker bypassing the internal control
function, manual detection using a binary
input is implemented.
Busbar protection
(Reverse interlocking)
Binary inputs can be used to block any of
the six current stages. Parameters are assigned to decide whether the input circuit
is to operate in open-circuit or closed-circuit mode. In this case, reverse interlocking
provides high-speed busbar protection in
radial or ring power systems that are
opened at one point. The reverse interlocking principle is used, for example, in medium-voltage power systems and in
switchgear for power plants, where a
high-voltage system transformer feeds a
busbar section with several medium-voltage outgoing feeders.
Motor protection

Fig. 5/25 Reverse interlocking

Features

For short-circuit protection, e.g. elements

I>> (50) and IE (50N) are available. The
stator is protected against thermal overload
by s> (49), the rotor by I2> (46), starting
time supervision (48).
Motor starting time supervision (ANSI 48)
The start-up monitor protects the motor
against excessively long starting. This can
occur, for example, if the rotor is blocked,
if excessive voltage drops occur when the
motor is switched on or if excessive load
torques occur. The tripping time depends
on the current.

Fig. 5/26 Wiring communication

For convenient wiring of the RS485 bus,
use bus cable system 7XV5103 (see part 15 of this catalog).

I
tTRIP = start t start max
I rms
I
for Irms > Istart, reset ratio N
I start
approx. 0.94
tTRIP

= Tripping time

Istart
= Start-up current of the motor
tstart max = Maximum permissible starting
time
Irms

= Actual current flowing

Siemens SIP 2008

Serial data transmission

A PC can be connected to ease setup of the
relay using the Windows-based program
DIGSI which runs under MS-Windows.
It can also be used to evaluate up to 8
oscillographic fault records, 8 fault logs
and 1 event log containing up to 30 operational indications. The SIPROTEC 7SJ600
transmits a subset of data via
IEC 60870-5-103 protocol:

General fault detection

General trip
Phase current IL2
User-defined message
Breaker control
Oscillographic fault recording

5/23

5 Overcurrent Protection / 7SJ600

Connection diagrams

Fig. 5/27
Connection of 3 CTs with measurement
of the phase currents

Fig. 5/28
Connection of 3 CTs with measurement
of the earth (ground) current

Fig. 5/29
Connection of 2 CTs only for isolated or
resonant-earthed (grounded) power systems

Fig. 5/30
Sensitive earth-fault protection
(3 -times increased sensitivity)

Fig. 5/31 Example of typical wiring

5/24

Siemens SIP 2008

5 Overcurrent Protection / 7SJ600

Technical data
General unit data

Heavy-duty (command) contacts

CT circuits

Trip relays, number

2 (marshallable)

Rated current IN

1 or 5 A

Contacts per relay

2 NO

Rated frequency fN

50/60 Hz (selectable)

Switching capacity
Make
Break

1000 W / VA
30 W / VA

Switching voltage

250 V

Permissible current
Continuous
For 0.5 s

5A
30 A

Overload capability current path

Thermal (r.m.s.)

Dynamic (pulse current)

Power consumption
Current input at IN = 1 A
at IN = 5 A

100 x IN for 1 s
30 x IN for 10 s
4 x IN continuous
250 x IN one half cycle
< 0.1 VA
< 0.2 VA

Power supply via integrated DC/DC converter

Rated auxiliary voltage Vaux /
permissible variations

24, 48 V DC/ 20 %
60, 110/125 V DC/ 20 %
220, 250 V DC/ 20 %
115 V AC/20 % +15 %
230 V AC/20 % +15 %

Design
Housing 7XP20
Weight
Flush mounting /cubicle mounting
Surface mounting
Degree of protection acc. to
EN 60529
Housing
Terminals

Refer to part 17 for

dimension drawings
Approx. 4 kg

Approx. 4.5 kg

Superimposed AC voltage,
peak-to-peak
at rated voltage
at limits of admissible voltage

12 %
6%

Power consumption
Quiescent
Energized

Approx. 2 W
Approx. 4 W

Serial interface

Bridging time during failure/

short-circuit of auxiliary voltage

50 ms at Vaux 110 V DC
20 ms at Vaux 24 V DC

Standard

RS485

Test voltage

2.8 kV DC for 1 min

Connection

Data cable at housing terminals, two

data wires, one frame reference, for
connection of a personal computer
or similar; core pairs with individual
and common screening, screen must
be earthed (grounded), communication possible via modem

Transmission speed

As delivered 9600 baud

min. 1200 baud,
max. 19200 baud

Binary inputs
Number

24 to 250 V DC

Current consumption, independent

of operating voltage

Approx. 2.5 mA

Pickup threshold, reconnectable by

solder bridges
Rated aux. voltage
24/48/60 V DC Vpickup
Vdrop-out
110/125/220/250 V DC
Vpickup
Vdrop-out

17 V DC
< 8 V DC
74 V DC
< 45 V DC

Signal contacts

Electrical tests
Specifications
Standards

Signal/alarm relays

2 (marshallable)

Contacts per relay

1 CO

Switching capacity
Make
Break

Interface, serial; isolated

3 (marshallable)

Operating voltage

1000 W / VA
30 W / VA

Switching voltage

250 V

Permissible current

5A

IEC 60255-5; ANSI/IEEE C37.90.0

Insulation test
Standards
High-voltage test (routine test)
Except DC voltage supply input
and RS485
Only DC voltage supply input
and RS485
High-voltage test (type test)
Between open contacts of trip
relays
Between open contacts of alarm
relays
Impulse voltage test (type test)
all circuits, class III

Siemens SIP 2008

IP51
IP21

IEC 60255-5, ANSI/IEEE C37.90.0

2 kV (r.m.s.), 50 Hz
2.8 kV DC

1.5 kV (r.m.s.), 50 Hz
1 kV (r.m.s.), 50 Hz
5 kV (peak), 1.2/50 s,
0.5 J, 3 positive and 3 negative
impulses at intervals of 5 s

5/25

5 Overcurrent Protection / 7SJ600

Technical data

EMC tests for interference immunity; type tests

Mechanical stress tests

Standards

Vibration, shock and seismic vibration

IEC 60255-6; IEC 60255-22

(product standard)
EN 50082-2 (generic standard),
DIN VDE 0435 Part 303

High-frequency test
IEC 60255-22-1, class III

2.5 kV (peak), 1 MHz, = 15 s,

400 surges/s, duration 2 s

Electrostatic discharge
IEC 60255-22-2, class III
and IEC 61000-4-2, class III

4 kV/6 kV contact discharge,

8 kV air discharge, both polarities,
150 pF, Ri=330

Irradiation with radio-frequency

field
Non-modulated,
IEC 60255-22-3 (report) class III
Amplitude modulated,
IEC 61000-4-3, class III
Pulse modulated,
IEC 61000-4-3, class III
Fast transient interference/bursts
IEC 60255-22-4 and
IEC 61000-4-4, class III

10 V/m, 27 to 500 MHz

10 V/m, 80 to 1000 MHz,
80 % AM, 1 kHz
10 V/m, 900 MHz, repetition
frequency, 200 Hz, duty cycle 50 %

During operation
Standards

Acc. to IEC 60255-2-1 and

IEC 60068-2

Vibration
IEC 60255-21-1, class1
IEC 60068-2-6

Sinusoidal 10 to 60 Hz: 0.035 mm

amplitude, 60 to 150 Hz: 0.5 g acceleration
Sweep rate 1 octave/min
20 cycles in 3 orthogonal axes

Shock
IEC 60255-21-2, class 1

Half-sine, acceleration 5 g, duration

11 ms, 3 shocks in each direction of 3
orthogonal axes

Seismic vibration
IEC 60255-21-3, class 1,
IEC 60068-3-3

Sinusoidal
1 to 8 Hz: 3.5 mm amplitude
(horizontal axis)
1 to 8 Hz: 1.5 mm amplitude
(vertical axis)
8 to 35 Hz: 1 g acceleration
(horizontal axis)
8 to 35 Hz: 0.5 g acceleration
(vertical axis)
Sweep rate 1 octave/min
1 cycle in 3 orthogonal axes

2 kV, 5/50 ns, 5 kHz, burst length

15 ms, repetition rate 300 ms, both
polarities, Ri = 50 , duration 1 min

Conducted disturbances induced by 10 V, 150 kHz to 80 MHz,

radio-frequency fields,
80 % AM, 1 kHz
amplitude modulated
IEC 601000-4-6, class III

During transport

Power frequency magnetic field

IEC 61000-4-8, class IV
IEC 60255-6

30 A/m continuous, 50 Hz
300 A/m for 3 s, 50 Hz
0.5 mT; 50 Hz

Vibration
IEC 60255-21-1, class 2
IEC 60068-2-6

Oscillatory surge withstand

capability ANSI/IEEE C37.90.1
(common mode)

2.5 to 3 kV (peak), 1 MHz to

1.5 MHz, decaying oscillation, 50 shots
per s, duration 2 s, Ri = 150
to 200

Sinusoidal
5 to 8 Hz: 7.5 mm amplitude;
8 to 150 Hz: 2 g acceleration
Sweep rate 1 octave/min
20 cycles in 3 orthogonal axes

Fast transient surge withstand

capability ANSI/IEEE C37.90.1
(commom mode)

4 to 5 kV, 10/150 ns, 50 surges

per s, both polarities, duration 2 s,
Ri = 80

Shock
IEC 60255-21-2, class 1
IEC 60068-2-27

Half-sine, acceleration 15 g ,
duration 11 ms, 3 shocks in each
direction of 3 orthogonal axes

Radiated electromagnetic interference, ANSI/IEEE C37.90.2

10 to 20 V/m, 25 to 1000 MHz,

amplitude and pulse-modulated

Continuous shock
IEC 60255-21-2, class 1
IEC 60068-2-29

Half-sine, acceleration 10 g
duration 16 ms, 1000 shocks in each
direction of 3 orthogonal axes

High-frequency test
Document 17C (SEC) 102

2.5 kV (peak, alternating polarity),

100 kHz, 1 MHz, 10 MHz and
50 MHz, decaying oscillation,
Ri = 50

EMC tests for interference emission; type tests

Standard

5/26

Temperatures
Recommended temperature
during operation

EN 50081-* (generic standard)

Conducted interference voltage, aux. 150 kHz to 30 MHz

voltage CISPR 22, EN 55022,
DIN VDE 0878 Part 22,
limit value class B
Interference field strength
CISPR 11, EN 55011, DIN VDE
0875 Part 11, limit value class A

Climatic stress tests

30 to 1000 MHz

Permissible temperature
during operation
during storage
during transport
(Storage and transport with
standard works packaging)

5 C to +55 C / +23 F to +131 F

> 55 C decreased display contrast
20 C to +70 C / 4 F to +158 F
25 C to +55 C / 13 F to +131 F
25 C to +70 C / 13 F to +158 F

Humidity
Mean value per year 75 % relative
humidity, on 30 days per year
95 % relative humidity,
condensation not permissible

Siemens SIP 2008

5 Overcurrent Protection / 7SJ600

Technical data
Functions
Definite-time overcurrent protection (ANSI 50, 50N)
Setting range/steps
Overcurrent pickup phase I>
I/IN
earth IE>
phase I>> I/IN
earth IE>>
phase I>>> I/IN
Delay times T for I>, IE>, I>>
and IE>>
The set times are pure delay times
Pickup times I>, I>>, IE>, IE>>
At 2 x setting value, without
meas. repetition
At 2 x setting value, with meas.
repetition
Pickup times for I>>> at 2 x
setting value

= 0.1 to 25 (steps 0.1), or

= 0.05 to 25 (steps 0.01), or
= 0.1 to 25 (steps 0.1), or
= 0.05 to 25 (steps 0.01), or
= 0.3 to 12.5 (steps 0.1), or

0 s to 60 s (steps 0.01 s)

Approx. 35 ms
Approx. 50 ms
Approx. 20 ms

Reset times I>, I>>, IE>, IE>

I>>>

Approx. 35 ms
Approx. 65 ms

Reset ratios

Approx. 0.95

Overshot time

Approx. 25 ms

Tolerances
Pickup values I>, I>>, I>>>,
IE>, IE>>
Delay times T
Influencing variables
Auxiliary voltage, range:
0.8 Vaux /VauxN 1.2
Temperature, range:
0 C amb 40 C
Frequency, range:
0.98 f/fN 1.02
Frequency, range:
0.95 f/fN 1.05
Harmonics
Up to 10 % of 3rd harmonic
Up to 10 % of 5th harmonic

5 % of setting value
1 % of setting value or 10 ms
1%
0.5 %/10 K
1.5 %
2.5 %
1%
1%

Inverse-time overcurrent protection (ANSI 51/51N)

Setting range/steps
Overcurrent pickup phase Ip
earth IEp
Time multiplier for Ip, IEp
Tp

I/IN

(IEC charac.) 0.05 to 3.2 s

(steps 0.01 s)
(ANSI charac.) 0.5 to 15 s
(steps 0.1 s)

Overcurrent pickup phase I>> I/IN

phase I>>>
earth IE>>
Delay time T for I>>, IE>>

= 0.1 to 4 (steps 0.1)

= 0.05 to 4 (steps 0.01)

= 0.1 to 25 (steps 0.1), or

= 0.3 to 12.5 (steps 0.1), or
= 0.05 to 25
(steps 0.01), or

0 s to 60 s (steps 0.01 s)

Tripping time characteristics acc. to IEC

Pickup threshold
Drop-out threshold
Drop-out time

Approx. 1.1 x Ip
Approx. 1.03 x Ip
Approx. 35 ms

Tripping time characteristics acc. to ANSI / IEEE

Pickup threshold
Drop-out threshold,
alternatively: disk emulation

Siemens SIP 2008

Approx. 1.06 x Ip
Approx. 1.03 x Ip

Tolerances
Pickup values
Delay time for 2 I/Ip 20
and 0.5 I/IN 24
Influencing variables
Auxiliary voltage, range:
0.8 Vaux/VauxN 1.2
Temperature, range:
-5 C amb 40 C
+23 F amb 104 F
Frequency, range:
0.95 f/fN 1.05

5%
5 % of theoretical value 2 %
current tolerance, at least 30 ms
1%
0.5 %/10 K
8 % referred to theoretical time
value

Negative-sequence overcurrent protection (ANSI 46)

Setting range/steps
Tripping stage
I2> in steps of 1 %
I2>> in steps of 1 %
Time delays T(I2>), T(I2>>)
in steps of 0.01s
Lower function limit

8 % to 80 % of IN
8 % to 80 % of IN
0.00 s to 60.00 s
At least one phase current 0.1 x IN

Pickup times
Tripping stage I2>, tripping
stage I2>>
But with currents I/IN>1.5
(overcurrent case) or
negative-sequence current
< (set value +0.1 x IN)

At fN = 50 Hz
Approx. 60 ms

60 Hz
75 ms

Approx. 200 ms

310 ms

Reset times
Tripping stage I2>,
tripping stage I2>>

At fN = 50 Hz
Approx. 35 ms

60 Hz
42 ms

Reset ratios
Tripping stage I2>,
tripping stage I2>>
Tolerances
Pickup values I2>, I2>>
with current I/IN 1.5
with current I/IN > 1.5
Stage delay times
Influence variables
Auxiliary DC voltage, range:
0.8 Vaux /VauxN 1.2
Temperature, range:
5 C amb +40 C
+23 F amb +104 F
Frequency,
range: 0.98 f/fN 1.02
range: 0.95 f/fN 1.05

Approx. 0.95 to 0.01 x IN

1 % of IN 5 % of set value
5 % of IN 5 % of set value
1 % or 10 ms
1%
0.5 %/10 K

2 % of IN
5 % of IN

Auto-reclosure (option) (ANSI 79)

Number of possible shots
Auto-reclose modes

1 up to 9
3-pole

Dead times for 1st to 3rd shot

0.05 s to 1800 s (steps 0.01 s)
for 4th and any further 0.05 s to 1800 s (steps 0.01 s)
shot
Reclaim time after successful AR

0.05 s to 320 s (steps 0.01 s)

Lock-out time after

unsuccessful AR

0.05 s to 320 s (steps 0.01 s)

Reclaim time after manual close

0.50 s to 320 s (steps 0.01 s)

Duration of RECLOSE command

0.01s to 60 s (steps 0.01 s)

Control
Number of devices
Evaluation of breaker control

1
None

5/27

5 Overcurrent Protection / 7SJ600

Technical data
Thermal overload protection with memory (ANSI 49)
(total memory according to IEC 60255-8)

Fault recording

Setting ranges
Factor k acc. to IEC 60255-8
0.40 to 2 (steps 0.01)
Thermal time constant th
1 to 999.9 min (steps 0.1 min)
Thermal alarm stage alarm /trip 50 to 99 % referred to trip temperature rise (steps 1 %)
Prolongation factor at motor
1 to 10 (steps 0.01)
stand-still k

Start signal

Trip, start release, binary input

Fault storage
Total storage time (fault detection or trip command = 0 ms)

Max. 8 fault records

Max. 5 s, incl. 35 power-fail safe
selectable pre-trigger and
post-fault time
0.30 to 5.00 s (steps 0.01 s)

Reset ratios
/trip
/alarm
Tolerances
Referring to k IN
Referring to trip time

Reset below alarm

Approx. 0.99
5 % (class 5 % acc. to
IEC 60255-8)
5 % 2 s (class 5 % acc. to
IEC 60255-8)

0.5 % / 10 K

0.05 to 0.50 s (steps 0.01s)

0.05 to 0.50 s (steps 0.01 s)
1 instantaneous value per ms at 50 Hz
1 instantaneous value per 0.83 ms at
60 Hz

Additional functions
Operating currents
Measuring range
Tolerance

IL1, IL2, IL3

0 % to 240 % IN
3 % of rated value

Thermal overload values

Calculated temperature rise
Measuring range
Tolerance

1%

Without pickup value IL / IN

0.4 to 4 (steps 0.1)

Memory time multiplier TL

(= t6 -time)

1 to 120 s (steps 0,1 s)

Reset ratio I/IL

Approx. 0.94

Tolerances
Referring to pickup threshold
1.1 IL
Referring to trip time

Max. storage period per fault

event Tmax
Pre-trigger time Tpre
Post-fault time Tpost
Sampling rate

IL1, IL2, IL3

Operational measured values

Influence variables referred to k IN

Auxiliary DC voltage in the range 1 %
of 0.8 Vaux / VauxN 1.2
Temperature, range:
5 C amb +40 C
+23 F amb +104 F
Frequency, range:
0.95 f/fN 1.05

Measured values

5%
5% 2s

Influence variables
Auxiliary DC voltage in the range 1 %
of 0.8 Vaux / VauxN 1.2
Temperature, range:
0.5 %/10 K
5 C amb +40 C
+23 F amb +104 F
Frequency, range:
1%
0.95 f/fN 1.05

/trip
0 % to 300 %
5 % referred to trip

Fault event logging

Storage of indications of the last 8
faults
Time assignment
Resolution for operational
indications
Resolution for fault event
indications
Max. time deviation

1s
1 ms
0.01 %

Trip circuit supervision

With one or two binary inputs
Circuit-breaker trip test
With live trip or trip/reclose cycle
(version with auto-reclosure)

Starting time supervision (motor protection)

Setting ranges
Permissible starting current
IStart/IN
Permissible starting time tStart

CE conformity
0.4 to 20 (steps 0.1)
1 to 360 s (steps 0.1 s)
2

This product is in conformity with the Directives of the European Communities on the harmonization of the laws of the Member States relating to
electromagnetic compatibility (EMC Council Directive 89/336/EEC) and
electrical equipment designed for use within certain voltage limits (Council
Directive 73/23/EEC).

Tripping characteristic

I
t = Start t for I rms > I Start
I rms

Reset ratio Irms / IStart

Approx. 0.94

Tolerances
Pickup value
Delay time

The unit has been developed and manufactured for application in an industrial environment according to the EMC standards.

5%
5 % of setting value or 330 ms

This conformity is the result of a test that was performed by Siemens AG in

accordance with Article 10 of the Council Directive complying with the
generic standards EN 50081-2 and EN 50082-2 for the EMC Directive and
standard EN 60255-6 for the low-voltage Directive.

5/28

This unit conforms to the international standard IEC 60255, and the German standard DIN 57435/Part 303 (corresponding to VDE 0435/Part 303).

Siemens SIP 2008

5 Overcurrent Protection / 7SJ600

Selection and ordering data

Description

Order No.

7SJ600 numerical overcurrent, motor and overload protection relay 7SJ600 A0 D

Binary input voltage 24 to 250 V DC with isolated RS485 port
Rated current at 50/60 Hz
1 A1)
5 A1)
Rated auxiliary voltage
24, 48 V DC
60, 110, 125 V DC2)
220, 250 V DC, 115 V AC2)
230 V AC3)
Unit design
For panel surface mounting, terminals on the side
For panel flush mounting/cubicle mounting

1
5

2
4
5
6

B
E

Languages
English, German, Spanish, French, Russian
Auto-reclosure (option)
Without
With

0
1

Control
Without
With

A
B

UL-Listing
Without UL-listing
With UL-listing

LSP2289-afp.eps

Accessories

Mounting rail

1) Rated current can be selected by

means of jumpers.
2) Transition between the two auxiliary
voltage ranges can be selected by
means of jumpers.

0
1

Converter RS232 (V.24) - RS485*

With communication cable for the
7SJ600 numerical overcurrent, motor and overload protection relay
Length 1 m
PC adapter
With power supply unit 230 V AC
With power supply unit 110 V AC

7XV5700- 0oo004)
7XV5700- 1oo004)

Converter, full-duplex,
fiber-optic cable RS485 with built-in power supply unit
Auxiliary voltage 24 to 250 V DC and 110/230 V AC

7XV5650- 0BA00

Mounting rail for 19 rack

C73165-A63-C200-1

Manual for 7SJ600

English
Spanish
French

C53000-G1176-C106-7
C53000-G1178-C106-1
C53000-G1177-C106-3

Sample order
7SJ600, 1 A, 60 - 125 V, flush mounting, ARC
Converter V.24 -RS485, 230 V AC
Manual, English

7SJ6001-4EA00-1DA0
7XV5700-0AA00
C53000-G1176-C106-7

3) Only when position 16 is not 1 (with UL-listing).

4) Possible versions see part 15.
* RS485 bus system up to 115 kbaud
RS485 bus cable and adaptor 7XV5103-oAAoo;
see part 15.

Siemens SIP 2008

5/29

5 Overcurrent Protection / 7SJ600

Connection diagram

Fig. 5/32
Connection diagram according to IEC standard

5/30

Siemens SIP 2008

5 Overcurrent Protection / 7SJ600

Dimension drawings in mm / inch

Dimension drawings for 1/6 x 19" housing (7XP20)

5
Side view

View from the rear

Panel cutout

Fig. 17/15
Housing for panel flush mounting/
cubicle mounting, terminals at rear (1/6 x 19")

Front view

Side view

Fig. 17/16
Housing for surface mounting,
terminals at top and bottom (1/6 x 19")

Siemens SIP 2008

5/31

5 Overcurrent Protection / 7SJ600

Dimension drawings in mm / inch

Dimension drawings for 1/6 x 19" housing (7XP20)

5
Front view

Side view

Fig. 17/17
Housing for panel surface mounting, terminals on
the side (1/6 x 19")

5/32

Siemens SIP 2008