Motor protection circuit breakers

Reliable moulded case motor protection circuit breakers
R. STAHL's moulded case motor protection circuit breakers offer reliable protection for Ex e and Ex d motors against short-circuiting and overloading in hazardous areas. They are available with a choice of different release types and, optionally, with an ammeter or auxiliary contacts. And thanks to their robust, polyester resin enclosure, they can be used in Zones 1, 2, 21 and 22.

R. STAHL's moulded case motor protection circuit breakers can be used to prevent Ex e and Ex d motors from being overloaded, especially when there are particularly high short-circuit currents. They are housed in a robust enclosure made from glass-fibre-reinforced polyester resin. The standard models are available with a choice of different releases, such as an electromagnetic tripping mechanism or an adjustable, phase-sensitive thermal overcurrent release. Undervoltage releases and shunt trips are also options, as are ammeters and auxiliary contacts. These circuit breakers offer reliable protection for your motors, electric lines and systems in hazardous areas.

  • Protection for Ex e and Ex d motors
  • Motor, electric line and system contactors
  • Release types: Thermal overcurrent releases, electromagnetic tripping mechanisms and, optionally, undervoltage releases or shunt trips

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Scope
Zones
Min. ambient temperature
Max. ambient temperature
Type of protection (IP)
Description​
Release voltage AC
Current adjustment range
Ammeter exist
Auxiliary contact
Releaser
Enclosure material
Connection

1 Serie (101 Products)

Motor Protection Circuit Breaker Series 8146/5-V27

  • Electric line and system protection for Ex e and Ex d motors
  • Robust enclosure made from glass fibre-reinforced polyester resin
  • Optional: Undervoltage release, shunt trip, ammeter, auxiliary contact
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