Motor starter 37 kW / 50 hp

Motor starter 37 kW / 50 hp

Safe protection and control of motors in the Ex area thanks to motor starter combinations
R. STAHL has explosion-protected components in its range which can be combined to form motor starter units up to 37 kW / 50 hp (480 V AC). These combinations provide protection against overload and short circuit, as well as a motor contactor for activating the relevant motors in hazardous areas. Thanks to a broad adjustment range, the protection level can be optimally adjusted to suit the conditions at the operating location.

From R. STAHL, you can receive a series of explosion-protected components, which reliably control and protect your motors. They are designed for rated currents up to 125 A and AC3 motor currents up to 96 A, and can safely switch off 10 kA short-circuit currents. In addition to a three-pole moulded case circuit breaker up to 125 A, the 8550/1 series also provides for this purpose a contactor up to 96 A with coil voltages of 24 to 500 V AC/DC, as well as an electronic overload relay up to 96 A. The connection terminals can be adjusted depending on the version for 10 (6 AWG) , 25 (2 AWG) or 95 mm2 (3/0 AWG). In this combination, they control and protect motors in IECEx and ATEX areas up to 37 kW and in NEC areas up to 50 hp. A particular focus in the development phase was placed on usage in LNG areas (especially for liquefaction of natural gas), where the low weight and compact design have additional advantages. Several starter combinations are possible in one Ex e enclosure.

  • Excellent current limiting in the event of a short circuit
  • Contactors with wide-range coil voltages
  • Electronic overload relay with a wide adjustment range

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Product Description
Product variant
Class1 Division and Zone
Trigger class
Rated operational voltage
Rated operational voltage AC
Rated operational voltage DC
Rated operational voltage AC (NEC)
Rated operational voltage DC (NEC)
Rated actuating voltage
Rated operational current
Rated operational current
Main contacts
Auxiliary contacts
Auxiliary contacts
1st auxiliary function
2nd auxiliary function
3rd auxiliary function
Min. ambient temperature
Max. ambient temperature
Connection cross-section
Connection cross-section
Connection cross-section AWG

4 Series (35 Products)

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