Configuration - ABB RELION REB500 Technical Manual

1MRK 505 406-UEN B
Signal
BlockInp
Trip
Start
5.6.6

Configuration

The following parameters have to be set:
Setting
Delay
Over or undervoltage
Number of phases
Two of these functions are frequently applied in a two-stage scheme. The first stage detects
lower prolonged overvoltages while the second guards against higher overvoltages, which
have to be cleared quickly.
Pick-up voltage (V-setting)
Single-phase VT: A setting of 1.3 U
the VT.
Y-connected three-phase VTs: A setting of 1.3 U
at the input of the VT(phase-to-neutral voltage).
Compensating any difference between the rated voltages of VTs U
recommended. This is achieved with the aid of the reference value of the A/D channel or by
correcting the voltage setting.
For example, for U
be:
U
1.4
U
MaxMin
This parameter provides a choice of the following settings:
• MIN (3ph): Protection picks up when all three-phase voltages have fallen below setting.
• MIN (1ph): Protection picks up when the lowest of the phase voltages falls below setting.
• MAX (3ph): Protection picks up when all three-phase voltages have exceeded setting.
• MAX (1ph): Protection picks up when the highest of the phase voltages exceeds setting.
Operating characteristic of a two-stage overvoltage protection
(U = rated relay voltage)
N
Bay protection functions REB500
Technical manual
Description
Input for blocking the function.
• F: not blocked
• T: blocked
• xx: all binary inputs (or outputs of protection functions)
Tripping signal
Pick-up signal
= 12 kV and U
GN
12 kV
 
GN
1.4 1.12
15 kV
N 1
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V-setting
Delay
MaxMin
NrOfPhases
corresponds to a pick-up voltage of 130 V at the input of
N
corresponds to a pick-up voltage of 130V / √3
N
= 15 kV, the setting for a pick-up voltage of 1.4 U
N1
Section 5
Bay protection functions
GUID-3BEB8035-50E3-42E4-A31B-F0BF4F40B9CB v1
and protected unit U
N1
should
GN
is
GN
113