ABB REB500 Operation Manual page 16

Section 2
System Overview
8
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 chapter 3.9.5.2.
1MRK 500 124-UEN
Operation Manual
Distributed busbar protection REB500