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NSN 5925-00-257-5733

Overload Switch

About this product

Rectangular dimensional envelope body style, metal case material, 2 poles, maximum continuous load current rating per pole: 640.0 amperes dc all locations.

Manufacturer part number 56J972 for national stock number 5925002575733.

Datasheet

  • Product description

    Circuit Breaker NSN 5925-00-257-5733.

  • MPN or Model

    56J972

  • Schedule B
    8536.20.0040 (Automatic circuit breakers, for a voltage not exceeding 1, 000 v, nesoi)
  • NMF (National Motor Freight)
    061300 - Circuit Breaker/switch NOI
  • Body Style
    Rectangular dimensional envelope
  • Overall Length
    23.875 inches
  • Overall Height
    14.000 inches
  • Overall Width
    14.375 inches
  • Case Material
    Metal
  • Unthreaded Mounting Hole Diameter
    0.562 inches
  • Pole Quantity
    2
  • Mounting Facility Type And Quantity
    6 unthreaded hole
  • Maximum Continuous Load Current Rating Per Pole
    640.0 amperes dc all locations
  • Operating Voltage Type And Rating Per Pole In Volts
    1000.0 dc all locations
  • Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
    20000.0 dc all locations
  • Circuit Protection Type
    Overcurrent all locations
  • Trip Release Method
    Magnetic all locations
  • Trip Release Characteristic
    Time delay all locations
  • Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
    200.0 all locations
  • Reset Method
    Automatic
  • Manual Actuator Type And Quantity
    1 rotary
  • Auxiliary Switch Function And Quantity
    1 control
  • Internal Trip Release Configuration
    Shunt trip all locations
  • Terminal Type And Quantity
    4 bus bar
  • Reference Number Differentiating Characteristics
    As differentiated by continuous load current per pole, ultimate trip rating of continuous current rating per pole in percent
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Circuit Breaker

A device with means other than fuses for automatically opening the circuit in which it is installed when the current varies from the predetermined value for which the device is set. May include provisions for manual operation. At least one set of contacts must be in series with the actuating element(s). A combination of semiconductor and passive devices may be used in lieu of contacts. For automatically operated items in which the actuating (tripping) element and contacts are not in series, see relay (as modified). For items which are operated both manually and automatically but the actuating elements and contact are not in series, see relay-switch. Excludes circuit breaker box and magneto "breaker" assemblies. See also switch (as modified); and controller.

Mechanic Bill explains Overload Switch

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NSN 5925002575733

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
56J972 Westinghouse Electric Corp
3001988AND985385 Naval Ship Systems Command
22D8930 Westinghouse Electric Corp
56J972X22D8930 Westinghouse Electric Corp
S019Y2546 Westinghouse Electric Corp
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