ABB RELION REF610, Technical Reference Manual

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4. Application
REF610 is a versatile multifunction protection relay mainly designed for protection
of incoming and outgoing feeders in MV distribution substations. The relay can also
be used as back-up protection for motors, transformers and generators, in industrial
as well as in utility applications.
The large number of integrated protection functions, including three overcurrent
protection elements, non-directional ground-fault protection elements as well as
thermal protection, makes the relay a complete protection against overcurrent and
ground faults.
The optional arc protection for detection of arc situations in air insulated metal-clad
switchgears and the auto-reclose function for automatic clearing of overhead line
faults increase the range of applications further.
The large number of digital inputs and output contacts allows a wide range of
applications.
4.1. Requirements
To secure correct and safe operation of the relay, preventive maintenance is
recommended to be performed every five years when the relay is operating under
the specified conditions; see Table 4.1.-1 and Section 5.2.4. Technical data.
When being used for real-time clock or recorded data functions, the battery should
be changed every five years.
Table 4.1.-1 Environmental conditions
Recommended temperature range (continuous) -10...+55 ° C
Limit temperature range (short-term) -40...+70
°
C
Temperature influence on the operation accuracy of the protection relay
within the specified service temperature range 0.1%/ ° C
Transport and storage temperature range -40...+85 ° C
4.2. Configuration
The appropriate configuration of the output contact matrix enables the use of the
signals from the protection elements as contact functions. The pickup signals can be
used for blocking co-operating protection relays and signalling.
The figures below represent the relay with the default configuration: all trip signals
are routed to trip the circuit breaker.
In the first example Fig. 4.2.-1, the residual current is measured via a core-balance
current transformer and the output contacts are connected to enable the use of the
auto-reclose function. In the second example Fig. 4.2.-2, the residual current is
measured via a summation connection of the phase current transformers and the
output contacts are connected to enable the use of the trip lockout function with an
external reset switch.
Feeder Protection Relay
Technical Reference Manual - ANSI Version
REF610 REF610
1MRS755535