All distribution sites

Search for subsidiaries and agencies
x
Search
Previous
DEU - en
logo
ALL DISTRIBUTION

Search

Webcode overview

Motor protection

Reliable motor protection for hazardous areas
R. STAHL offers various components that have been specially designed for protecting motors in Ex Zones 1 and 2. They are easy to install in Ex e enclosures, robust, and corrosion-resistant. It goes without saying that, when it comes to switching operations, they offer 100% reliability.

R. STAHL offers many components with different functions for protecting motors. They are installed in enclosures with the Ex e type of protection and are available as moulded case circuit breakers for motor protection, as motor protection relays, thermistor motor protection relays, as a combination of contactor and motor protection relay (max. 4, 7.5 or 11 kW at 400 V) and as a contactor (max. 4 W at 400 V) with thermistor motor protection relay. All motor protection components have a corrosion-resistant enclosure and easily accessible connection terminals to make installation easier and allow for safe connection. They are reliably secured using screws in the enclosure to ensure that they are protected against vibrations.

Filter product lines

Select the product lines that are applicable to your intended use.

Filter product lines

hide
Certificates
Zone
Product Description
Rated operational voltage AC
DC rated operational voltage
Frequency
Rated operational current
Current-setting range
Auxiliary contacts
1st auxiliary function
2nd auxiliary function
3rd auxiliary function
Min. ambient temperature
Max. ambient temperature
Subsitution for material

4 Series (224 Products)

Series 8523/1-MCP 32 A motor protection circuit breakers
Ex Series 8523/1-MCP 32 A motor protection circuit breakers R. STAHL

Series 8523/1-MCP 32 A motor protection circuit breakers

  • Safe switching for protecting Ex e motors
  • Release: Non-adjustable fast short-circuit release, adjustable thermal overcurrent release
  • Optional: Undervoltage release (U..) and shunt trip (A..)
  • Optional: Up to 4 contacts, consisting of auxiliary contact (H.), fault signal contact (S.) and short-circuit alarm contact (C.)
  • Test and Reset buttons available
  • 15 current ranges from 0.1 to 32 A
  • The circuit breakers in this series have phase failure detection
Moulded case circuit breakers for motor protection Series 8523/8
Ex Moulded case circuit breakers for motor protection Series 8523/8 R. STAHL

Moulded case circuit breakers for motor protection Series 8523/8

  • Safe switching for protecting Ex e motors
  • Release: Non-adjustable fast short-circuit release, adjustable thermal overcurrent release
  • Undervoltage releases and shunt trips are also options
  • Optional auxiliary contacts: 1 NC + 1 NO or 2 NC + 2 NO
Motor protection relay Series 8510
Ex Motor protection relay Series 8510 R. STAHL

Motor protection relay Series 8510

  • Cost-effective overload protection for motors
  • The release is easy to adjust and reset
  • Robust modules, easy and vibration-proof installation
Thermistor motor protection relay Series 8510
Ex Thermistor motor protection relay Series 8510 R. STAHL

Thermistor motor protection relay Series 8510

  • One device – suitable for all motor powers
  • Direct measurement of the temperature in the stator winding via PTC resistors
  • Robust modules for vibration-proof screw mounting in Ex e enclosures