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Start from the circuit problem.

Review the engineering task, applicable modules and information required to confirm a solution.

TestBlock

CT/PT, trip, signal and control circuits require safe handling during commissioning, testing and maintenance.

01

Circuit tasks

  • CT/PT test isolation

  • Trip-circuit isolation

  • Maintenance safety

Related modules

  • TSBA series

  • TSBE series

Fast Trip and Lockout

Protection outputs require high-speed operation, multiple contacts and retained lockout after critical events.

02

Circuit tasks

  • High-speed trip

  • Multiple outputs

  • Lockout retention

  • Manual reset

Related modules

  • GRUS-11H series

  • GRUS-11TA series

Trip Circuit Supervision

The trip circuit must remain available when a breaker operation is required.

03

Circuit tasks

  • Continuity supervision

  • Open-circuit alarm

  • Coil-circuit availability

Related modules

  • GRUS-TCS series

Fault Acquisition, Display, Expansion & Communication

Abnormal field signals require centralized acquisition, clear indication, alarm and remote output.

04

Circuit tasks

  • Signal acquisition

  • Status display

  • Audible/visual alarm

  • Expansion and communication

Related modules

  • SAD series

  • SFA700 series

Auxiliary Supply Circuit Supervision

Protection and trip-related auxiliary supplies require dependable supervision without unnecessary nuisance alarms.

05

Circuit tasks

  • Supply supervision

  • Voltage-state recognition

  • Alarm output

Related modules

  • GRUS-RTU series

  • USR series

Control Panel Environment

Humidity and condensation inside cabinets can reduce insulation performance and secondary-circuit reliability.

06

Circuit tasks

  • Temperature and humidity

  • Condensation prevention

  • Heater or ventilation control

Related modules

  • TH-E series

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