The Beckwith Electric
NOTE: The hinge pins must be saved from the original control. The BT terminal blocks remain in the control cabinet.
1.0Description
Standard FeaturesThe
1.Voltage waveform sampling and digital processing circuitry ensure accurate rms voltage sensing in the presence of distortion on the input voltage and current.
2.Accuracy exceeds the ANSI/IEEE
3.Input and output circuits are protected against system transients. Units pass all requirements of ANSI/IEEE C37.90.1- 1989, which defines surge withstand capability. All input and output terminals will withstand 1500 V ac rms to chassis or instrument ground for one minute with a leakage current not to exceed 25 mA, from all terminals to ground. Input and output circuits are electrically isolated from each other, from other circuits and from ground.
4.Separate motor power, test terminal and voltage sensing fuses are easily changed from the front panel and spare fuses are provided in their respective fuseholders.
5.Easily tested by use of the following:
a.VOLTAGE SOURCE switch disconnects the voltage transformer input and connects the VOLTAGE IN binding posts to the voltage input and motor circuit.
b.VOLTAGE IN binding posts on the front panel allow application of a 120 V rms nominal voltage to the unit for test procedures.
c.METER OUT binding posts on the front panel allow reading of the input voltage when used in conjunction with the BIAS TEST VOLTAGE screen of the
d.RAISE and LOWER band edge LEDs on the
6.NEUTRAL light illuminates when the regulator is in the neutral tap position.
7.AUTO/OFF/MANUAL switch allows manual operation of the control.