Main Circuit Breaker
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This page explains how Operating Mechanism is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
The mechanical assembly responsible for opening and closing the contacts of a main circuit breaker.
Technical details and manufacturing context for Operating Mechanism
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Operating Voltage | 12–40.5 kV | Must match system voltage; higher voltage requires larger insulation clearances.IEC 62271-100 |
| Rated Normal Current | 630–3150 A | Continuous current carrying capacity; higher current requires larger contacts and conductors.IEC 62271-100 |
| Rated Short-Circuit Breaking Current | 25–50 kA | Must exceed maximum fault current; insufficient rating leads to contact welding or explosion.IEC 62271-100 |
| Mechanical Endurance | 10000–30000 operations | Number of close-open cycles without maintenance; lower endurance increases maintenance frequency.IEC 62271-100 |
| Opening Time | 20–60 ms | Time from trip command to contact separation; longer time increases arc energy and contact wear.IEC 62271-100 |
| Closing Time | 40–100 ms | Time from close command to contact touch; longer time may cause pre-strike issues.IEC 62271-100 |
| Operating Pressure (Pneumatic) | 1.0–1.6 MPa | |
| Control Voltage | 110/220 V DC ±10% V DC | Must match auxiliary supply; incorrect voltage causes relay malfunction.IEC 61131-2 |
| Operating Temperature Range | -25–+55 °C | Outside range, lubricants and seals may fail.IEC 62271-1 |
| Degree of Protection | IP54–IP65 | Higher IP needed for dusty or wet environments.IEC 60529 |
| Weight | 50–200 kg | Affects mounting structure and handling. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| pressure: | Atmospheric to 1.5 bar (typical enclosure pressure) |
| other spec: | Mechanical endurance: 10,000 operations minimum, Electrical endurance: 1,000 operations at rated current |
| temperature: | -40°C to +85°C (operating), -55°C to +125°C (storage) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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It provides the mechanical force to open or close the main contacts, ensuring reliable circuit interruption and protection.
Reference ranges are 12–40.5 kV for rated operating voltage and 630–3150 A for rated normal current, but these must be confirmed for the specific model.
It uses stored energy from springs, a motor, or a solenoid. Closing releases energy to drive contacts together; opening releases a latch to allow springs to separate contacts.
Relevant standards include IEC 62271-100 for ratings, IEC 62271-1 for temperature, and IEC 60529 for protection degree. Always verify compliance with the manufacturer.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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