ABB REF 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
The protection functions of REF 610 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 stage
I> 51
Three-phase non-directional
overcurrent protection, high-
set stage
I>> 50/51
Three-phase non-directional
overcurrent protection,
instantaneous stage
I>>> 50
Phase discontinuity protection ΔI> 46
Three-phase thermal overload
protection for cables
θ>49
Non-directional earth-fault
protection, low-set stage
I
0
> 51N
Non-directional earth-fault
protection, high-set stage
I
0
>> 50N/51N
Arc protection ARC 50/50NL
Circuit-breaker failure
protection
CBFP 62BF
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 earth-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
REF 610REF 610
1MRS755310

ABB REF 610 Specifications

General

Brand	ABB
Model	REF 610
Category	Relays
Language	English