ABB RELION 615 Series Product Manual page 10

Motor Protection and Control
REM615
Product version: 5.0 FP1
received from other devices over the station bus, thus
increasing the extent of relevant information.
The standard configuration D includes one conventional
residual current (Io) input and three combi-sensor inputs for
phase currents and phase voltages. The connection of the three
combi-sensors is made with RJ-45 type of connectors.
Sensors offer certain benefits compared to conventional
current and voltage instrument transformers, for example,
GUID-52860380-D410-4969-A44E-7C7311221D0F V5 EN
Figure 5. Motor protection and control of contactor and circuit breaker controlled motors using standard configurations A and B
Figure 5 illustrates an example of motor protection and control
of contactor and circuit breaker controlled motors using
standard configurations A and B. To prevent possible power
system instability due to busbar voltage collapse, the
10
3I
Io
RTD
REU615
REM615
Std. conf. B Std. conf.
ANSI
ANSI IEC
37 3I< 47O-/59
47U+/27
46R I2>>
47O-/59 U2>/3U> 50L/50NL
59G
47U+/27 U1</3U<
49,66,48,51LR Is2t n< 81
49M 3Ith>M 81LSH
50L/50NL ARC
1) Light detection only
51N-2/67N-1 Io>>/Io> ->
50P/51P 3I>>>
51LR Ist>
51P/51N 3I/Io
current sensors do not saturate at high currents, they consume
less energy and they weigh less. In voltage sensors the risk of
ferro-resonance is eliminated. The sensor inputs also enable
the use of the relay in compact medium voltage switchgears,
such as ABB's UniGear Digital, SafeRing and SafePlus, with
limited space for conventional measuring transformers, thus
requiring the use of sensor technology. Further, the adapters
also enable the use of sensors with Twin-BNC connectors.
REF615
Std. conf. C/D
ANSI IEC
46 I2>
Io
50L/50NL ARC
50P/51P 3I>>>
50N/51N-1/51N-2 Io>>>/Io>>/Io>
51BF/51NBF 3I>/Io>BF
3I
68 3I2f>
3I
3U Uo
Io
RTD
REM615
A Std. conf.
IEC ANSI IEC
U2>/3U> 37 3I<
U1</3U< 46R I2>>
1) ARC 1) 49,66,48,51LR Is2t n<
Uo> 49M 3Ith>M
f</f>,df/dt 50L/50NL ARC
UFLS/R 51N-1/51N-2 Io>>/Io>
50P/51P 3I>>>
51LR Ist>
51P/51N 3I/Io
simultaneous starting of several motors can be inhibited with
the "restart inhibit" input of REM615. The optional RTD/mA
inputs are utilized for motor winding and bearing temperature
supervision.
1MRS756890 N
A
ABB