Motor Protection Relay / Device | Intelligent Motor Protection
Description
Motor Protection Relay / Device — Suzhou Manufacturer
Wan Long Electric’s Intelligent Motor Protection Relay provides comprehensive protection for AC induction motors against overload, phase failure, phase unbalance, locked rotor, thermistor overtemperature, and ground fault. Designed for industrial motor control centers (MCC) and standalone motor starters, it maximizes motor uptime and extends motor life.
Key Features
- Comprehensive Protection Functions: Overload, phase loss, phase reversal, phase unbalance, locked rotor, stall, thermistor (PTC/NTC), ground fault, undercurrent
- Wide Current Setting Range: 0.1A to 630A (via built-in CT or external CT)
- Intelligent Self-Learning: Automatic motor parameter learning for optimized protection thresholds
- LCD Display: Real-time motor current, voltage, power, temperature, and fault history
- Communication Interface: RS485 / Modbus RTU for MCC and SCADA integration
- Trip Class: Class 5, 10, 20, 30 selectable
- Output Relays: Trip relay, alarm relay, and ready relay outputs
Technical Specifications
- Supply Voltage: 85–265V AC/DC (universal) or 24V DC
- Current Setting Range: 0.1A – 630A
- Trip Class: Class 5 / 10 / 20 / 30 (IEC 60947-4-1)
- Phase Unbalance Detection: ≥5% unbalance triggers alarm; ≥15% triggers trip
- Response Time (Phase Loss): <500ms
- Thermistor Input: PTC / NTC compatible
- Standards: IEC 60947-4-1, IEC 60255, GB 14048.4
- Mounting: DIN rail or panel mount
- Protection Degree: IP40 (front face)
Applications
- Motor Control Centers (MCC) in industrial plants
- Pump and compressor motor protection
- Fan, blower, and HVAC motor protection
- Conveyor and crane motor protection
- Water and wastewater treatment plant motors
- Mining and heavy industry motor applications
- Oil & gas processing equipment motors
Why Choose Wan Long Electric?
Our motor protection relays are engineered for reliability in the harshest industrial environments. Manufactured in Suzhou with full IEC 60947-4-1 compliance, they offer superior protection accuracy and easy integration into existing motor control systems via Modbus RTU. We provide OEM/ODM services, custom current ranges, and full technical documentation in English.
Contact our team for application support and a competitive quotation.
Care
To maintain the beauty and integrity of your purchase, we recommend treating it with care. Simple maintenance practices, such as gentle washing and proper storage, can effectively preserve the longevity of your favorites. We encourage you to refer to the care instructions included with each item, designed to help you keep your purchase in top condition.
Design
Our dedication to excellence extends beyond materials; it encompasses the artistry and craftsmanship illustrated in every piece we create.