Current‑to‑Voltage Analog Converter used with the M‑2001 Series

Digital Tapchanger Controls to provide positive tap position knowledge

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

an included 3 foot 6-pin connector

• Provides a 6-position terminal block for easy connections

• Enclosed components permit user to select one of four current range

configurations

• Small size permits mounting on any flat surface at least 4–5/8″ wide

and 2–5/8″ high

The M‑2025B Current Loop Interface Module is a current‑to‑voltage analog

converter that is used with a suitable analog position‑to‑current transducer

and the M‑2001 series of Digital Tapchanger Controls to provide positive

tap position knowledge of an LTC transformer or regulator. Components

required to configure the M‑2025B and interface with the M‑2001 are

included.

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.

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.

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

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.

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,

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.

Control Accuracy Specification: All units comply with ANSI/IEEE C57.15-1986

defining control accuracy of operation.

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.

Transient Protection

Surge Withstand Capability:

IEEE C37.90.0-2002: 2500 V pk-pk oscillatory, 4000 V pk fast transient burst

IEEE C37.90.0-2002: 2500 V pk-pk oscillatory, 5000 V pk fast transient burst

High Voltage: All M-2027 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 grounds.

Radiated Electromagnetic Withstand Capability: All units are protected against

electromagnetic radiated interference from portable communications transceivers.

Environmental

Temperature range: -40° C to +85° C

Humidity: Operational to a maximum of 95% relative humidity.

Fungus resistance: A conformal coating is used on the printed circuit board

coating inhibit fungus growth.

Physical

Size: 7.32″ long x 4.10″ wide x 2.40″ high (18.6 cm x 10.2 cm x 6.1 cm)

Approximate Weight: 2.0 lbs (.91kg)

Warranty

The M‑2027 is covered by a five year warranty from date of shipment.

• Maintains the M-2001C/D  or M-6200 energized during power outages to

maintain the continuity of the communications loop

• Accepts power input from station auxiliary supply over a range of 105

Vac to 140 Vac (50 or 60 Hz)

• Fuse protected and transient suppressed, input and output

• Substation hardened -40° C to +85° C

• Conformal coated

• Includes 6 foot output cable and adapters for M-2001C/D and M-6200

controls

Input

105 Vac to 140 Vac at 50Hz/60Hz

Burden of less than 2 VA

Fuse protected (1.5 A)

Transient protected

Output

+12 Vdc nominal @ 1 amp

Fuse protected (1.5 A)

Transient protected

The M-2054 Surface Mount Kit, 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.

Voltage waveform sampling and digital processing circuitry ensure 

accurate rms voltage sensing in the presence of distortion on the input

voltage and current.

Accuracy exceeds the ANSI/IEEE C57.15-1986 Class 1 specification over

the temperature range of -40° C to +80° C.

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

isolated from each other, from other circuits and from ground.

A voltage sensing fuse and a spare fuse are provided.

Application

LTC Transformer Controls

Dimensions

Weight

1 lb.