Beckwith Electric M-2174B Adapter Panel

Adapts M‑2001 Series Digital Tapchanger Control to Replace Moloney/Tempo

LTC Control Panel

• Connects easily to the M‑2001 Series Digital Tapchanger

Control using mounting screws and 24‑pin connector

• Fits directly into existing LTC control cabinet using the same

door mounting hardware from the original panel

• Provides built‑in CT shorting protection when the

M‑2001 Series Digital Tapchanger Control is removed

The M‑2174B is a replacement panel which, when combined with the M‑2001

Series Digital Tapchanger Control, provides convenient direct replacement for

Tempo (Moloney) LTC Control Panels. The M‑2174B hardware consists of a

front panel with a hinge on the right side, and mounts into the control cabinet

using the same door mounting hardware which must be saved from the original

panel. The door mounting hardware consists of either a locking handle, or two

thumbscrews, depending on the original panel configuration.

The M‑2174B features a voltmeter testing terminal, circuit breakers for the

motor and for the voltage transformer, a manual RAISE/OFF/AUTO/OFF/LOWER

switch, and a fuse for control motor power.

The M‑2174B also includes the M‑2067B Adapter Panel, which contains a voltage

fuse and two terminal blocks on the rear for external connections,

Interface

External connections are made to two terminal blocks located on the rear of the

M‑2067B Adapter Panel.

An additional terminal block provides access to auxiliary functions, including

self‑test alarm, user‑programmable alarm, manual raise/lower, and operations

counter.

Testing Specifications

High Voltage: All input and output terminals will withstand 1500 Vac rms to chassis

or instrument ground for one minute with a leakage current not to exceed 25 mA,

for all terminals to ground. Input and output circuits are electrically isolated from

each other, from other circuits and from ground.

Surge Withstand Capability: All input and output circuits are protected against system

transients. Units pass all requirements of ANSI/IEEE C.37.90.1-1989 defining surge

withstand capability.

Radiated Electromagnetic Withstand Capability: All units are protected against

electromagnetic radiated interference from portable communications transceivers.

Environmental

Temperature Range: Functionality is maintained from ‑40° to +85° C.

Humidity: Functionality is maintained under 95% relative humidity (non‑condensing).

Fungus Resistance: A conformal printed circuit board coating inhibits fungus growth.

Physical

Size: 18" high x 15–1/4" wide (45.7 cm x 38.7 cm), fits box with outside dimensions of

17‑7/8" high x 15‑7/64" wide (45.4 cm x 38.4 cm)

Approximate Weight: 15 lbs (6.8 kg)

Approximate Shipping Weight: 18 lbs (8.2 kg)

Approximate Weight with M‑2001 Series Digital Tapchanger Control: 18 lbs, 11 oz (8.5 kg)

Warranty

The M-2174B Adapter Panel is covered by a five year warranty from date of shipment.