Beckwith Electric M-2278 Adapter Panel

The M-2278 is an adapter panel which, when combined with the M-2001 Series

Digital Tapchanger Control, provides convenient direct replacement for

Allis-Chalmers surface-mount LTC transformer controls.

The M-2278 is designed to mount against a flat surface using four screws and

includes a front door hinge for easy replacement of the control panel.

• Connects easily to the M-2001 Series Digital Tapchanger Control using mounting

screws and 24-pin connector

• Provides direct mechanical replacement of Allis-Chalmers surface-mount LTC

transformer controls

• Provides built-in CT shorting protection when the M-2001 Series Digital Tapchanger

Control is removed

The M‑2278 is an adapter panel which, when combined with the M‑2001 Series

Digital Tapchanger Control,

provides convenient direct replacement for Allis‑Chalmers surface‑mount LTC

transformer controls. The

M‑2278 is designed to mount against a flat surface using four screws and includes

a front door hinge for easy replacement of the control panel.

Interface

External connections are made to a terminal block located on the top of the rear

panel of the M‑2278. Additional connections may be made to two terminal blocks

located on the printed circuit board of the adapter panel.

These terminal blocks provides access to auxiliary functions, including self‑test alarm,

user‑programmable alarm, auto disable and manual raise/lower.

Features

Separate fuses for test terminal, voltage sensing and motor power are on the front

panel. Spare fuses for each are in the fuse holder.

Binding posts on the front panel allow easy connections for test procedures.

RAISE / OFF / LOWER, AUTO / OFF / MANUAL and VOLTAGE SOURCE switches,

DRAG HANDS RESET button, and NEUTRAL LIGHT are standard.

NEUTRAL LIGHT will light to indicate that the regulator is in the neutral position

for those products equipped with a circuit for this purpose.