Protective Monitoring Relay Solutions

Application Scenarios / Pain Points

Conventional protection devices are highly integrated, costly and complex to maintain, and are unsuitable for lightweight use cases requiring only one or two elements.
Fragmented, discrete components increase wiring/commissioning complexity, reduce consistency and reliability, and raise costs.
Sites require multi-quantity monitoring (V/I/temperature) and interlocks; conventional approaches are interference-prone and cause misoperations.
Typical scenarios include metering voltage supervision, over-voltage supervision, voltage-present/absent interlock, phase-loss/phase-sequence monitoring, over-current/load protection, heater status monitoring, and transformer/trace-heater temperature control.

Our Solution

Define “lightweight protective relays” with highly integrated measurement/supervision modules for voltage, current, and temperature.
Voltage supervision: WY-30 Series covers metering voltage, over-voltage, voltage-present/absent interlock, and phase-loss/sequence monitoring.
Synchronism-check: WT Series permits closing only when voltage magnitude and phase angle conditions are met.
Current & load: over-current/load protection and heater status monitoring, coordinated with trace-heater current detection.
Temperature control: dual-channel temperature measurement & alarms; dual-PT100 inputs for breaker trace-heaters with sequenced switching and failure alarms.
Configurable thresholds and operate delay/debounce with sequenced switching to avoid inrush and misoperations.
DIN-rail mounting and modular wiring reduce panel wiring/commissioning complexity and total cost.
Complies with Level-4 EMC typical of power systems, improving stability and consistency.