Main Features; Application - ABB Relion REB500 Product Manual

Distributed busbar protection REB500
Product version: 8.2
1.

Application

REB500
The numerical busbar protection REB500 is designed for
the high-speed (sub-cycle), selective protection of MV, HV
and EHV busbar installations at a nominal frequency of
50, 60 Hz
The modular system structure is enabling the protection to
be easily configured to suit the layout of the primary
system.
The flexibility of the system enables all configurations of
busbars from single to quadruple, with transfer buses or
ring busbars and 1½ breaker schemes to be protected.
In 1½ breaker schemes the busbars and entire diameters,
including Stub/T-Zone can be protected. An integrated
tripping scheme allows saving external logics as well as
wiring.
The system is scalable for up to 60 feeders (bay units)
and a total of 32 busbar zones.
The numerical busbar protection REB500 detects all
phase and earth faults in solidly grounded and resistive-
grounded power systems and phase faults in ungrounded
systems and systems with Petersen coils.
Typical substation layouts
Figure 1. Single busbar
Figure 2. Double busbar
4
The main CTs supplying the currents to the busbar
protection have to fulfill only modest performance
requirements (see page 17). The protection operates
discriminatively for all faults inside the zone of protection
and remains reliably stable for all faults outside the zone
of protection.
REB500 bay protection (optional)
The system provides an option to extend the functional
scope of REB500 by a set of predefined bay protection
functions used as main 2 or back-up line protection.
Version 'Line variant L-V2' includes distance, directional/
non directional overcurrent and directional earthfault
protection functions (see Table 2).
As regards the level of voltages and frequencies busbar
and station protection have the same application area.
For details on application and technical data refer to the
REB500 Application Manual for bay protection functions.
1MRK 505 352-BEN
Issued: 2016-03-01
Revision: -
ABB