China MS132 Low Voltage Motor Protection Circuit Breaker - 25A, 15kW, 100kA, Factory Suppliers for Industrial Safety
Type and Meaning

| 1 | Series Number MS: Thermal-magnetic trip MO: Magnetic-only trip |
| 2 | Rated current, trip class and breaking capacity 116-32A, Class 10A (10/16/30/50kA) 132-32A, Class 10A (25/50/100kA) 450-50A, Class 10A (50kA) 451-50A, Class 20A (50kA) 495-100A, Class 10A (50kA) 496-100A, Class 20A (100kA) 497-100A, Class 10A (100kA) |
| 3 | Thermal protection setting value |
Product Features
| Model | MS132 |
| Thermal protection and electromagnetic protection | Yes |
| Electromagnetic protection | - |
| Phase failure protection | Yes |
| Switch position… | ON/OFF/TRIP |
| Magnetic release indication | YES |
| Lockable handle, no accessories required | YES |
| Isolation function | Yes |
| Width | 45mm |
| Rated operating current | 0.16...32A |
| Current setting range | 0.1...32A |
| Ambient air temperature | -25...+60°C*) |
Product Display

Technical Parameters
| Motor Rated Power | Thermal Trip Setting Range | Type | Short-Circuit Breaking Capacity | |
| Icu | Ics | |||
| 0.03 kW | 0.1…0.16A | MS132-0.16 | 100 kA | 100 kA |
| 0.06 kW | 0.16…0.25A | MS132-0.25 | 100 kA | 100 kA |
| 0.09 kW | 0.25…0.4A | MS132-0.4 | 100 kA | 100 kA |
| 0.18 kW | 0.4…0.63A | MS132-0.63 | 100 kA | 100 kA |
| 0.25 kW | 0.63…1.0A | MS132-1.0 | 100 kA | 100 kA |
| 0.55 kW | 1.0…1.6A | MS132-1.6 | 100 kA | 100 kA |
| 0.75 kW | 1.6…2.5A | MS132-2.5 | 100 kA | 100 kA |
| 1.5 kW | 2.5…4.0A | MS132-4.0 | 100 kA | 100 kA |
| 2.2 kW | 4.0…6.3A | MS132-6.3 | 100 kA | 100 kA |
| 4.0 kW | 6.3...10A | MS132-10 | 100 kA | 100 kA |
| 5.5 kW | 8…12A | MS132-12 | 100 kA | 100 kA |
| 7.5 kW | 10…16A | MS132-16 / MS165-16 | 100 kA | 100 kA |
| 7.5 kW | 14...20A | MS165-20 | 100 kA | 100 kA |
| 7.5 kW | 16…20A | MS132-20 | 100 kA | 100 kA |
| 11 kW | 18…25A | MS165-25 | 100 kA | 75 kA |
| 11 kW | 20…25A | MS132-25 | 50 kA | 50 kA |
| 15 kW | 25…32A | MS132-32 | 50 kA | 25 kA |
| 15 kW | 23...32A | MS165-32 | 100 kA | 75 kA |
| 22 kW | 30…42A | MS165-42 | 50 kA | 25 kA |
| 22 kW | 40...54A | MS165-54 | 50 kA | 25 kA |
| 30 kW | 52…65A | MS165-65 | 50 kA | 25 kA |
Outline and Installation Dimension
Frequently Asked Questions
What is the difference between the MS132 (MS series) and MO series motor protection circuit breakers?
The MS series (e.g., MS132) features both thermal-magnetic trip protection, providing overload (thermal) and short-circuit (magnetic) protection. The MO series provides magnetic-only trip protection, suitable for applications where external overload protection is already provided.
What is the current setting range of the MS132 motor protection circuit breaker?
The MS132 has a current setting range of 0.1 to 32A, with a rated operating current of 0.16 to 32A. This covers a wide range of motor sizes from 0.03 kW up to 15 kW.
Does the MS132 support phase failure protection?
Yes, the MS132 motor protection circuit breaker includes built-in phase failure protection, which helps prevent motor damage caused by single-phasing or unbalanced phase conditions.
What are the switch positions available on the MS132?
The MS132 offers three switch positions: ON, OFF, and TRIP. The TRIP position clearly indicates when the device has tripped due to a fault condition, and the magnetic release indication provides additional fault visibility.
What is the maximum short-circuit breaking capacity (Icu) of the MS132?
The MS132 series offers a maximum short-circuit breaking capacity (Icu) of up to 100 kA, depending on the specific model and current rating. For example, models from MS132-0.16 through MS132-12 all have an Icu of 100 kA.
Can the MS132 handle be locked without additional accessories?
Yes, the MS132 features a lockable handle that does not require any additional accessories. This simplifies lockout/tagout procedures and enhances safety during maintenance operations.







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