ABB RER620 Technical Manual

1MAC309294-MB F Section 4
Protection functions
RER620 83
Technical Manual
Section 4 Protection functions
4.1 Current protection
4.1.1 Single-phase non-directional overcurrent protection 51P/50P
4.1.1.1 Identification
4.1.1.2 Function block
Figure 34: Function block
4.1.1.3 Functionality
The three-phase overcurrent protection 51P/50P is used as one-phase, two-phase or
three-phase non-directional overcurrent and short-circuit protection for feeders.
The function picks up when the current exceeds the set limit. The trip time characteristics
for low stage 51P and high stage 50P-1/2 can be selected to be either definite time (DT) or
inverse definite minimum time (IDMT).The instantaneous stage 50P-3 always trips with
the DT characteristic.
In the DT mode, the function trips after a predefined trip time and resets when the fault
current disappears. The IDMT mode provides current-dependent timer characteristics.
The function contains a blocking functionality. It is possible to block function outputs,
timers or the function itself, if desired.
4.1.1.4 Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are “Enable” and “Disable.”
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Single-phase non-directional overcurrent
protection - Low stage
SPHLPTOC 3I> 51P
Single-phase non-directional overcurrent
protection - High stage
SPHHPTOC 3I>> 50P-1/50P-2
Single-phase non-directional overcurrent
protection - Instantaneous stage
SPHIPTOC 3I>>> 50P-3
I_A
I_B
I_C
BLOCK
ENA_MULT
51P-1/2
TRIP
TRIP_A
TRIP_B
TRIP_C
PICKUP
PICKUP_A
PICKUP_B
PICKUP_C
I_A
I_B
I_C
BLOCK
ENA_MULT
50P-1
TRIP
TRIP_A
TRIP_B
TRIP_C
PICKUP
PICKUP_A
PICKUP_B
PICKUP_C
I_A
I_B
I_C
BLOCK
ENA_MULT
50P-2
TRIP
TRIP_A
TRIP_B
TRIP_C
PICKUP
PICKUP_A
PICKUP_B
PICKUP_C

ABB RER620 Specifications

General

Brand	ABB
Model	RER620
Category	Controller
Language	English