Category: Industry Trends

Features

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

front panel, and 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 are

standard.

The Allis-Chalmers regulator with which the UJ-1 control was used does not

provide for a neutral tap position light, a tap position drag-hands reset, or a

tapchanger operations counter. These functions are not active on the M-2347

Adapter Panel. Also the lack of the operation counter circuit in the regulator

prevents the use of the tap position function of the M-2001.

The M-2347 is an adapter panel which, when combined with the M-2001

Series Digital Tapchanger Control, provides convenient direct replacement

for Allis-Chalmers UJ-1 regulator controls. The M-2347 consists of a front

panel, supplemental printed circuit board, 24-pin extension cable and 6-pin

extension wire harness. Mounting of the front panel and supplemental

printed circuit board onto the control panel frame requires hole drilling

following the instructions provided with the M-2347.

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

mounting screws and 24-pin connector

• Provides mechanical replacement of the old regulator control using the

same control panel mounting frame, hardware and seven-position jack plug

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

Tapchanger Control is removed

The M‑2264B mounts into the control cabinet using the same two thumbscrews

which must be saved from the original control.

Interface

External connections are made via a wiring harness that connects from a fifteen

‑position terminal block to

the terminal block on the existing control cabinet. An additional terminal block

provides access to auxiliary

functions, including self‑test alarm, user‑programmable alarm, auto disable and

manual raise/lower.

Features

Separate fuses for voltage sensing and motor power are on the front panel.

Spare fuses for each are in the fuse holder.

Binding post on the front panel allows easy connections for test procedures.

The M-2264B is an adapter panel which, when combined with the M-2001 Series

Digital Tapchanger Control, provides convenient direct replacement of balance

beam controls for General Electric ML-32 regulators.

The M-2264B mounts into the control cabinet using the same two thumbscrews

which must be saved from the original control.

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

screws and 24-pin connector

• Provides direct mechanical replacement of the existing regulator control using

the same two thumbscrews

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

Tapchanger Control is removed

The M‑2264B is an adapter panel which, when combined with the M‑2001 Series

Digital Tapchanger Control,

provides convenient direct replacement of balance beam controls for General

Electric ML‑32 regulators.

The Beckwith Electric M-2148 Adapter Panel, used in conjunction

with the M-2001 series 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. The M-2148 Adapter Panel, with the M-2001

series Tapchanger Control, provides a solid state voltage control relay

designed to directly replace the General Electric LRT 48 control.

There are several sizes of LRT 48 controls, therefore, verify that the

M-2148 is the correct replacement.

The combination of the Tapchanger Control and Adapter Panel includes

the following features:M-2148-P: Replaces General Electric LRT-48

Controls and includes the M-0115A and M-0127A for paralleling.

(M-0329B is not available)M-2148-B: Replaces General Electric

LRT-48 Controls and includes the M-0329B for LTC Backup Control

Protection.

• Voltage waveform sampling and digital processing circuitry ensure

accurate rms voltage sensing in the presence of distortion on the

input voltage and current.

• Control accuracy is +/-0.3 % when tested in accordance with the

ANSI/IEEE C57.15.9-1999 standard over a temperature range of –30° C

to +65° C. The control accuracy is +/-0.5 % when tested over the full

operational temperature range of –40° C to +85° 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.

The M‑2355Q is an adapter panel which, when combined with the M‑2001D

Digital Tapchanger Control, provides convenient direct replacement for Cooper

(formerly McGraw‑Edison).

For use with single phase regulator controls installed on QD3. QD5 and QD8

Quick Drives only:

• CL-1

• CL-2

• CL-2A

• CL-4A

• CL-4B

• CL-4C

• CL-5

• CL-6

• CL-7

• The M‑2355Q consists of a front door panel with hinge leaves on the right side.

It mounts into the control cabinet using the same two hinge pins, which must

be saved from the original control.

• Connects easily to the M‑2001D Digital Tapchanger Control using mounting

screws and 24‑pin connectorFits directly into existing regulator control cabinet

using the same two hinge pins

• Provides built‑in CT shorting protection when the M‑2001D Digital Tapchange

Control is removed

• Optional SCADA Cutout (LOCAL/ REMOTE) switch (for use with SCADA enabled

M‑2001D controls) allows Local Blocking of SCADA commands

• Optional SCAMP™ (SCADA Controllable AUTO/MANUAL Pushbutton) switch

replaces AUTO/ OFF/MANUAL toggle switch

• Optional 2 level Local Voltage Reduction switch

The M-5329 Three-Phase LTC Backup Control provides extra protection

to save your customers from the hazards and inconvenience of excessively

high or low voltage on any phase. Defective LTC tapchanger controls can

cause either too high or too low a voltage along the line.

This can possibly damage customers’ motors, computers, or televisions.

Even when the control is operating properly, customers close to the

transformer may receive dangerously high voltage as the line drop compensator

attempts to maintain a constant voltage under heavy load at a central point on

the distribution line. The Beckwith Electric M-5329 LTC Backup Control can be

installed as a solution to both of these problems. It will prevent a defective LTC

tapchanger control from running the voltage outside the upper and lower voltage

limits and will prevent the line drop compensator from raising the voltage too

high under full load or overload conditions.

• Set the voltage bands on the M-5329 slightly wider than the transformer control

limits to ensure that a failed control will not result in a runaway LTC transformer.

• Under full or overload conditions, the M-5329 automatically takes over as an upper

voltage limit control that is not affected by load current, to prevent damage to

equipment close to the transformer.

• While the Block Raise contact prevents a raise operation, a Lower contact forces

the tapchanger down if the primary voltage subsequently rises.Capabilities of the

M-5329 include:

• Provides all components that must be added to an LTC Transformer for paralleling,

using the circulating current method.

• Prevents a defective LTC tapchanger control from running the voltage outside the

upper or lower limits.

• Prevents the line drop compensator from raising the voltage too high under full or

overload conditions.

• Monitors all three-phases and blocks LTC tapchanger operation if any phase is

outside the setpoints.Additionally, the M-5329 is fully transient protected and operates

within ±1% voltage accuracy over a temperature range of -40° to +80° C.

The M-0127A AC Current Relay guards against excessive circulating current using the circulationg current

method or the ∆VAR® 1 method. The M-0127A can be used in other current- and voltage-sensing

applications. Its adjustment range is 0.01 to 0.1 A.

Additional Applications

The M‑0127A and M‑0170A can be used wherever an adjustable, low burden AC relay is required. They

have virtually no time delay, a very small hysteresis and a normally closed output for use on AC only. The

relay output draws approximately 6 mA of in‑phase current through a 120 Vac load when open. These factors

must be considered for the user’s specific application.

By adding external series resistors, the relays may be used for voltage sensing. For example, with a 10 K

series resistor, the M‑0127A is adjustable from 100 to 140 Vac, using 10 to 14 mA current setting range.

Use of a 10 K, 10 W wire‑wound resistor is suggested.

M‑0127A Application

The M‑0127A AC Current Relay is primarily designed as a recommended addition to the Circulating Current

or Delta VAr1 Paralleling configurations used with LTC Transformers. Its purpose is to monitor the current in

the circulating loop between transformers, and interrupt Motor Power to its monitored transformer, should

the circulating current exceed a predetermined value. The M‑0127A range permits the maximum circulating

current to be set from 5% to 50% of the rated full load current.

Other relays used for this purpose have an impedance exceeding 5.000 Ω which may cause the main CT to

saturate, making the entire circulating current scheme operate poorly. The low impedance of the M‑0127A

relay avoids this problem.

The output should be connected in series with the common lead of the automatic control circuit of the motor

starter relay. When used with the Beckwith Electric M‑0067E control, the M‑0127A output contacts will be

in series with the lead that would otherwise have gone directly to terminal TB1‑8 of the M‑0067E. Polarity

of the M‑0127A input and output can be ignored.

M‑0170A Application

The M‑0170A AC Current Relay is intended to be used in the load current circuit to prevent the tapchanger

from changing taps on excessive load current. Its range permits the current setting from 100% to 200% of

the rated full load current. The relay is connected in the same manner as the M‑0127A.

The M-0127A AC Current Relay guards against excessive circulating current using the circulationg current

method or the ∆VAR® 1 method. The M-0127A can be used in other current- and voltage-sensing

applications. Its adjustment range is 0.01 to 0.1 A.

• M–0127A intended for use in 0.2 A circulating current circuit of paralleled LTC transformers to guard

against damaging excessive circulating current

• M–0170A prevents damage to LTC transformer’s switching mechanism under excessive loads

• Available in:

• M–0127A: 0.01 to 0.1 Amps

• M–0170A: 0.2 to 0.4 Amps

• Both relays can be used in other current and voltage-sensing applications.

M‑0170A Application

The M‑0170A AC Current Relay is intended to be used in the load current circuit to prevent the

tapchanger from changing taps on excessive load current. Its range permits the current setting

from 100% to 200% of the rated full load current. The relay is connected in the same manner as the

M‑0127A.