Trip Circuit Supervision Relays in Overseas Projects

TonyZhang
Oct 8
2 min read

In every protection system, trip circuit integrity is a critical acceptance and maintenance checkpoint. A circuit that fails between operations can silently disable protection—leaving breakers unable to respond when needed. For overseas substations, integrators need relays that continuously monitor trip circuits under both breaker open and breaker closed conditions, in line with IEC standards and international O&M expectations.

The GRUS-TCS series trip circuit supervision relay is built for that task. Available in TCS10 (group supervision) and TCS30 (per-phase supervision) configurations, it provides constant monitoring, clear status indication, and fault-tolerant design trusted in EPC and utility projects worldwide.

Core Features

Dual-state monitoring – continuously supervises circuit health whether the breaker is open or closed.
Flexible configuration –
Anti-chatter design – 500–1000 ms return delay filters transient fluctuations and prevents nuisance alarms.
Selectable contact logic – models available with 1NO+1NC / 2NC (TCS10) or 3NO+3NC / 6NC (TCS30).
Failsafe outputs – optional “fault-closed” configuration aligns with DCS preferences.
Wide coil options – 110 / 125 / 220 V DC; low power consumption.
Compliance – tested per IEC 60255 (measurement & control relays) and IEC 61000 (EMC); CE certified.

Application Example: Nepal 33 kV Industrial Park

Configuration: GRUS-TCS30 installed for per-phase trip circuit monitoring.
Purpose: Detect open circuits or fuse failures before energization or during operation.
Result: Reduced commissioning time and improved operational confidence; faults localized by phase, aiding remote maintenance teams.

Engineering Value

Continuous readiness: Detects faults before the next protection trip occurs.
Flexible integration: Compatible with different DCS philosophies—supports both fault-open and fault-closed outputs.
Simplified acceptance: Front-panel indication and standard terminal mapping streamline FAT and SAT checks.
Global compatibility: CE certification and IEC testing make it immediately acceptable in international project documentation.

The GRUS-TCS10/30 trip circuit supervision relays give engineers the assurance that breakers will respond when called upon. Their continuous monitoring, configurable logic, and international compliance have made them a standard feature in overseas substations and industrial facilities.

Call to Action

Trip circuit integrity is the silent safeguard of every protection system. Don’t leave it to chance—equip your panels with supervision relays that meet global standards.

Ask for detailed wiring diagrams and configuration guidance.
Discuss with our engineers whether group or per-phase supervision best fits your project.
Keep your protection system always ready, from commissioning to operation.

Contact: 📩 tonyzhang@odes.com.cn

Or visit: 🌐 https://www.odes-electric.com/

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Call to Action

Trip circuit integrity is the silent safeguard of every protection system. Don’t leave it to chance—equip your panels with supervision relays that meet global standards.

Ask for detailed wiring diagrams and configuration guidance.
Discuss with our engineers whether group or per-phase supervision best fits your project.
Keep your protection system always ready, from commissioning to operation.