Technical Description; Functional Description; Product Functions; Protection Functions - ABB REF 610 Technical Reference Manual

1MRS755310
5.
5.1.
5.1.1.
5.1.1.1.
5.1.1.2.
Feeder Protection Relay
Technical Reference Manual

Technical description

Functional description

Product functions

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
Three-phase non-directional
overcurrent protection, low-
set stage
Three-phase non-directional
overcurrent protection, high-
set stage
Three-phase non-directional
overcurrent protection,
instantaneous stage
Phase discontinuity protection ΔI>
Three-phase thermal overload
protection for cables
Non-directional earth-fault
protection, low-set stage
Non-directional earth-fault
protection, high-set stage
Arc protection
Circuit-breaker failure
protection
Automatic reclosing
Lockout relay
For descriptions of the protection functions, refer to Section 5.1.4.11. Technical data
on protection functions.

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.
IEC symbol
I>
I>>
I>>>
θ>
I >
0
I >>
0
ARC
CBFP
0→1
REF 610 REF 610
IEEE Device No.
51
50/51
50
46
49
51N
50N/51N
50/50NL
62BF
79
86
19