ABB REF610 - Technical Description; Protection Functions

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5. Technical description
5.1. Functional description
5.1.1. Product functions
5.1.1.1. Protection functions
The protection functions of REF610 with their IEC symbols and IEEE device
numbers are presented in the table below:
Table 5.1.1.1.-1 IEC symbols and IEEE device numbers
Function description IEC symbol IEEE Device No.
Three-phase non-directional
overcurrent protection, low-
set element
I> 51P
Three-phase non-directional
overcurrent protection, high-
set element
I>> 50P-1
Three-phase non-directional
overcurrent protection,
instantaneous element
I>>> 50P-2
Phase discontinuity protection ΔI> 46
Three-phase thermal overload
protection for cables
θ>49
Non-directional ground-fault
protection, low-set element
I
0
> 51N
Non-directional ground-fault
protection, high-set element
I
0
>> 50N
Arc protection ARC ARC
Circuit-breaker failure
protection
CBFP CBFAIL
Automatic reclosing 0→179
Lockout relay 86
For descriptions of the protection functions, refer to Section 5.1.4.11. Technical data
on protection functions.
5.1.1.2. Inputs
The relay is provided with four energizing inputs, two optional light sensor inputs,
two digital inputs and three optional digital inputs controlled by an external voltage.
Three of the energizing inputs are for the phase currents and one for the ground-fault
current.
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 5.1.4.10.-7,
Table 5.2.1.-1 and Table 5.2.1.-5.
Feeder Protection Relay
Technical Reference Manual - ANSI Version
REF610REF610
1MRS755535