An operation system of generation/substation implements mainly three functions, protection, monitor/control and measurement.

To delve into each function, protection function is provided by protection relay. Monitor/control function is for switchgear like circuit breaker and disconnection switch, and it also monitors voltage, current and electric physical properties.

For a technology related to operation system, technology has been developed from analog to a digital due to a development of a computer technology. Recently, along with a development of telecommunication, a telecommunication technology based on an international protocol has been applied to electric power operation system.

BCU (Bay Control Unit) is a digital device (called IED, intelligent Electronic Device) attached with a communication, a protection, a control and monitor functions. These days, it supports IEC 61850 protocols widely applied as an international standard in fields of substation automation. BCP (Bay Controller Panel) performs as an interface between monitoring/control systems and controlled facility. It enhances economy and credibility through BCU attached on BCP, having flexible digital control function and communication function. BCP implements control/monitoring/measurement function as a RCP does by using enunciator and meter.

Bay Control Panel lets implementation of control and status monitor on circuit breaker, disconnection switch and earthing switch at workstation through telecommunication.

Also when a circuit breaker closes, having synchronization check function enables more stable operation of circuit breaker.

GABO’s Bay Control unit has a Controller Unit (6MD66) made from SIEMENS installed independently in each breaker. By having accumulated knowledge in manufacturer technology of protection panel, and experienced professionals, we strive to accomplish noise immunity, stable earthing, durability, insulation, assembly, all of which being incorporated in order to generate products of credibility.