Section 2 Application
2.1 General IED application
GUID-F13C1639-4853-4305-84CA-D9648B0648B0 v5
The numerical high impedance differential busbar protection REB650 IED
provides its users with a wide variety of application opportunities. Designed
primarily for the protection of single busbar with or without sectionalizers in high
impedance based applications, it also offers high impedance differential protection
for generators, autotransformers, shunt reactors and capacitor banks.
Its I/O capability allows you to protect up to three 3-phase high impedance
differential protection zones with a single IED. A number of additional protection
functions are available for the protection of the bus coupler bay. The additional
protection functions include different types of phase and earth fault overcurrent
protection and over voltage/under voltage protection.
One pre-configured package has been defined for the following application:
• 2 zones/1 checkzone, 3 phase high impedance (A03)
For the high impedance differential protection, the differential current process is
made in the analogue current transformer circuits where the differential current is
connected to the IED via a high ohmic resistor. In REB650, a current input is used
for each phase and protection zone. The package is configured and ready for direct
use. Analog inputs and binary input/output circuits are pre-defined.
The IED can be used in applications with the IEC/UCA 61850-9-2LE process bus
with up to four Merging Units (MU). Each MU has eight analogue channels, four
current and four voltages. Conventional input transformer module and Merging
Unit channels can be mixed freely in your application.
The pre-configured IED can be changed and adapted to suit specific applications
with the application configuration tool.
Forcing of binary inputs and outputs is a convenient way to test wiring in
substations as well as testing configuration logic in the IEDs. Basically it means
that all binary inputs and outputs on the IED I/O modules (BOM, BIM and IOM)
can be forced to arbitrary values.
Central Account Management is an authentication infrastructure that offers a
secure solution for enforcing access control to IEDs and other systems within a
substation. This incorporates management of user accounts, roles and certificates
and the distribution of such, a procedure completely transparent to the user.
1MRK 505 388-UEN B Section 2
Application
Busbar protection REB650 2.2 IEC 23
Application manual
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