ABB RELION REB500 Operation Manual page 16

Distributed busbar protection

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Section 3

System overview

The digital busbar protection REB500 is divided into several hardware units. Bay units measure the line

and bus-tie breaker currents and may be installed close to the respective CTs. They communicate with

the central unit via a process bus. The central unit processes the current signals measured by the bay

units and distributes the tripping signals back to the bay units in the event of an internal busbar fault. The

system can be controlled by a local HMI (LHMI) on the Central unit and Bay units, by comprehensive

external HMI software, or a remote HMI over a station bus connection. Communication with the station

automation system (SAS) is possible via the central unit.

When configuring the IP-address for the LHMI Ethernet port to the fixed value of

192.168.0.1, a DHCP server functionality will be activated on this port. A maximum of 10

IP addresses will be assigned automatically, when connected. This functionality is

available on the LHMI port only. Information on how to configure different IP-addresses

can be found in

Section

4.9.5.2.

1MRK 500 132-UUS Rev. B

Distributed busbar protection REB500

Operation manual

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