ABB REU 610, Technical Reference Manual

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5. Technical description
5.1. Functional description
5.1.1. Product functions
5.1.1.1. Protection functions
Table 5.1.1.1.-1 IEC symbols and IEEE device numbers
Function description IEC symbol IEEE device
number
Overvoltage protection, low-set element U> 59P-1
Overvoltage protection, high-set element U>> 59P-2
Negative phase-sequence overvoltage
protection U
2
> 47
Undervoltage protection, low-set element U< 27P-1
Undervoltage protection, high-set element U<< 27P-2
Positive phase-sequence undervoltage
protection U
1
< 27D
Residual overvoltage protection, low-set
element U
0
> 59N-1
Residual overvoltage protection, high-set
element U
0
>> 59N-2
Circuit-breaker failure protection CBFP CBFAIL
Lockout relay 86
For protection function descriptions, refer to Section 5.1.4. Protection.
5.1.1.2. Inputs
The relay is provided with four energizing inputs, two digital inputs and three
optional digital inputs controlled by an external voltage. Three of the
energizing inputs are for the phase-to-phase voltages and one for the residual
voltage.
The relay is mainly designed to measure phase-to-phase
voltages, but it can be used for measuring phase-to-earth
voltages as well. However, the relay does not convert the voltage
from phase-to-earth voltage to phase-to-phase voltage.
The functions of the digital inputs are determined with the SGB switches. For
details, refer to Section 5.2.1. Input/output connections and Table 5.1.4.7.-7,
Table 5.2.1.-1 and Table 5.2.1.-5.
1MRS755972
Voltage Relay
Technical Reference Manual - ANSI Version
REU 610