BK997

Technical Characteristics

• Unthreaded Mounting Hole Diameter

  0.164 inches nominal single mounting facility

• Duty Type

  continuous

• Special Features

  mercury contacts hermetically sealed in; armored glass tube

• Mounting Facility Type And Quantity

  3 unthreaded hole single mounting facility

• Frequency In Hertz

  60.0 nominal

• Nominal Operating Current Rating And Type

  70.0 milliamperes ac single winding

• Nonpile-Up Main Contact Arrangement

  1 pole, single throw, normally open, momentary action

• Winding Dc Resistance Rating

  375.0 ohms nominal single winding

• Winding Quantity

  1

• Overall Width

  2.625 inches nominal

• Mounting Facility Pattern

  triangle single mounting facility

• Arc Quenching Method

  inert gas

• Overall Height

  3.938 inches nominal

• Main Contact Load Current Rating At Maximum Rated Voltage

  1.5 amperes ac resistive load and 150.0 milliamperes dc resistive load

• Coil Quantity

  1

• Overall Length

  5.750 inches nominal

• Operating Voltage Rating And Type At Specified Temp

  110.0 volts -80 deg fahrenheit type 4f single winding

• Time Delay

  1.50 seconds minimum adjustable operate time and 2.00 seconds maximum adjustable operate time

• Terminal Type And Quantity

  4 pin all functions

• Main Contact Maximum Voltage Rating In Volts

  220.0 ac and 220.0 dc

• Center To Center Distance Between Mounting Facilities Parallel To The Altitude Of An Isosceles Triangle

  4.500 inches nominal single mounting facility