The Beckwith Electric M-2299 Adapter Panel, used in conjunction with the M-2001 Series Digital Tapchanger Control, uses modern electronic digital design and digital processing circuitry to achieve an overall stability and resolution unattainable with electromechanical and analog design tapchanger controls. CMOS semiconductors are used throughout the design.

NOTE: The hinge pins must be saved from the original control. The BT terminal blocks remain in the control cabinet.

1.0Description

Standard Features

The M-2299 Adapter Panel, with the M-2001 Series Digital Tapchanger Control, provides a solid-state voltage control relay designed to directly replace the Toshiba TB-R800 control. The combination of the Tapchanger Control and Adapter Panel includes the following features:

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 C57.15-1986 Class 1 specification over the temperature range of –40° C to +70° C.

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.

M-2299 Application Guide

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 M-2001 Series Digital Tapchanger Control.

d.RAISE and LOWER band edge LEDs on the M-2001 Tapchanger Control indicate when the input voltage is outside the voltage band.

6.NEUTRAL light illuminates when the regulator is in the neutral tap position.

7.AUTO/OFF/MANUAL switch allows manual operation of the control.

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