ST31M3 Series Intelligent MCCB Trip Unit
ST31M3 Series Intelligent MCCB Trip Unit
This is a custom-made product. Please contact us to discuss your specifications and receive a quotation.
Description
ST31M3 Series – Intelligent MCCB Trip Unit
Overview
The ST31M3 Series is an intelligent protection core unit designed for use with CM1 and CM3 series molded case circuit breakers (MCCB). It provides comprehensive distribution protection, safeguarding circuits and power equipment against overload, short-circuit, and ground fault hazards.
Protection Functions
- Long-time overload protection
- Short-time short-circuit protection
- Instantaneous short-circuit protection
- Ground fault protection
- Overload pre-alarm
Auxiliary Functions
- Fault trip
- Overload pre-alarm
- Ground fault alarm
- Overload alarm without trip
- Remote shunt trip
Communication
- MODBUS protocol
User Interface
- Power indicator
- Pre-alarm indicator
- Trip function test port
- USB communication port
- Accessory communication port
- M-type: Parameters set via rotary switch – intuitive and convenient
- H-type: Parameters set via handheld programmer; supports measurement accuracy calibration and historical fault inquiry
Rated Parameters
- Power supply: CT self-powered; operates when 3-phase current > 0.2In or single-phase current > 0.4In
- Frame rating: 100A, 250A, 400–630A, 800A
- Rated current: 32A – 800A
Standards
GB14048.2 | IEC60947 | GB/T22710
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.