Square D Multi 9 Ground Fault Protector, 4-Pole, 480Y/277V, Type A-SI, 40A, 26 mA Instantaneous
The Square D Multi 9 ground fault protector (Model M9R81440) is a 4-pole, 40A, Type A-SI device rated at 480Y/277V with 26 mA instantaneous ground fault trip sensitivity. Provides combined circuit breaker and ground fault protection for 3-phase plus neutral circuits.
Square D Multi 9 Ground Fault ...
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Square D Multi 9 Ground Fault Protector – 4-Pole, 40A, 480Y/277V
The Square D (Schneider Electric) Multi 9 ground fault protector (Model M9R81440) integrates circuit breaker overcurrent protection with sensitive ground fault detection in a single 4-pole device. The Type A-SI ground fault function with a 26 mA instantaneous trip threshold provides robust personnel and equipment protection for 3-phase plus neutral systems at 480Y/277V.
Key Features
- 4-pole configuration for 3-phase plus neutral circuit protection
- 40A rated current
- Type A-SI ground fault protection for sensitive fault detection
- 26 mA instantaneous ground fault trip threshold
- Combined overcurrent and ground fault protection in one compact device
- Rated for 480Y/277V systems
- Part of the Square D Multi 9 series
Specifications
- Model: M9R81440
- Manufacturer: Square D (Schneider Electric)
- Poles: 4
- Amperage: 40A
- Voltage: 480Y/277V
- Ground Fault Type: Type A-SI
- Ground Fault Threshold: 26 mA Instantaneous
Applications
Designed for industrial and commercial applications requiring 4-pole ground fault protection at 480Y/277V. Suitable for 3-phase plus neutral distribution panels, motor control centers, and electrical systems where equipment ground fault protection or GFCI protection is mandated by code or project specifications.
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