Voltage Reduction Switch

The M‑2339 is an adapter panel which, when combined with the M‑2001 Series Digital Tapchanger Control,

provides convenient direct replacement for Siemens UJ‑3T, SJ‑4T, SJ‑5T, SJ‑6T, IJ‑2T, IJ‑2AT, MJ‑3T and

MJ-3AT LTC Transformer Control Panels. The M‑2339 mounts against a flat surface and includes a hinged

The front panel.

The M‑2339 includes the M‑2067 Adapter Panel with a voltage fuse and two terminal blocks on the rear

for additional external connections, and an M‑0169A Auxiliary Current Transformer (5 A or 8.66 A to 0.2 A)

mounted on the rear panel.

Interface

External connections are made to a terminal block located on the M‑2339’s rear panel. Additional terminal

block located on the M‑2067 Adapter Panel provides access to auxiliary functions, including self‑test alarm,

user-programmable alarm, manual raise/lower, and access to the digital operations counter.

Features

A shorting link for the line current output, a fuse for motor power, and a voltmeter testing terminal are included.

A DRAG-HANDS RESET button, LOWER/OFF/RAISE switch; and AUTO/MANUAL switches are also standard.

Adapts M‑2001 Series Digital Tapchanger Control to Replace Siemens UJ‑3T, SJ‑4T, SJ‑5T, SJ‑6T,

IJ‑2T, IJ‑2AT, MJ‑3T and MJ‑3AT Controls

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

and 24-pin connector

• Provides direct mechanical Replacement of the original panel

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

Control is removed

• Optional SCADA Cutout switch

• Optional 2 Level Local

Voltage Reduction Switch

The M‑2339 is an adapter panel which, when combined with the M‑2001 Series Digital Tapchanger Control,

provides convenient direct replacement for Siemens UJ‑3T, SJ‑4T, SJ‑5T, SJ‑6T, IJ‑2T, IJ‑2AT, MJ‑3T and

MJ-3AT LTC Transformer Control Panels. The M‑2339 mounts against a flat surface and includes a hinged

The front panel.

The M‑2339 includes the M‑2067 Adapter Panel with a voltage fuse and two terminal blocks on the rear

for additional external connections, and an M‑0169A Auxiliary Current Transformer (5 A or 8.66 A to 0.2 A)

mounted on the rear panel.

Interface

External connections are made to a terminal block located on the M‑2339’s rear panel. Additional terminal

block located on the M‑2067 Adapter Panel provides access to auxiliary functions, including self‑test alarm,

user-programmable alarm, manual raise/lower, and access to the digital operations counter.

Features

A shorting link for the line current output, a fuse for motor power, and a voltmeter testing terminal are included.

A DRAG-HANDS RESET button, LOWER/OFF/RAISE switch; and AUTO/MANUAL switches are also standard.

Options

SCADA CUTOUT switch allows Local blocking of SCADA commands (for use with SCADA enabled

M-2001C controls). Use of the SCADA Cutout switch requires an M‑2001 Series Control with firmware version

D‑0146V08.01.22 or later installed.

The Voltage Reduction switch allows 2 levels of Voltage Reduction to be selected.

• M-2948 Tap Position Sensor directly mechanically replaces the Selsyn-Type Tap

Position Sensor.

• Directly interfaces with a 4 to 20 mA output to the M-2025D Current Loop Interface

which provides the tap position to the M-2001 Series Tapchanger Control.

• Rotation – 0 to 210°, 297°, 306°, 315°, 325°, 330°, 340° and 350° configurations

• Degrees per Tap – 9° or 10°

• Neutrals – 1, 2, 3, 5 or 6

• Rotation Direction – Tap Position Sensors are available with either a positive

or negative rotation. With positive rotation, the shaft of the M-2948 rotates

clockwise while raising taps. With negative rotation, the shaft of the

M-2948 rotates counter-clockwise while raising taps.

M-2948 Digital Tapchanger Control – Specification

Input

• +12 Vdc Power input supplied from the M-2025D

• M-2025D Transient protected to ANSI/IEEE C37.90.1-1989

Output

• 4 to 20 mA relative to tap position

• 2 digital outputs for mechanical calibration

Protective Functions

Base Package

• Overexcitation (V/Hz) (24)

• Phase Undervoltage (27)

• Directional power sensitive triple‑setpoint Reverse Power, Low Forward

Power or Overpower detection, one of which can be used for sequential

tripping (32)

• Dual‑zone, offset‑mho Loss of Field (40), which may be applied with

undervoltage controlled accelerated tripping

• Sensitive Negative Sequence Overcurrent protection and alarm (46)

• Instantaneous Phase Overcurrent (50)

• Inadvertent Energizing (50/27)

• Generator Breaker Failure (50BF)

• Instantaneous Neutral Overcurrent (50N)

• Inverse Time Neutral Overcurrent (51N)

• Three‑phase Inverse Time Overcurrent (51V) with voltage control and

voltage restraint.

• Phase Overvoltage (59)

• Neutral Overvoltage (59N)

• Multi‑purpose Overvoltage (59X)

• VT Fuse‑Loss Detection and blocking (60FL)

• Residual Directional Overcurrent (67N)

• Four‑step Over/Underfrequency (81)

• Phase Differential Current (87)

• Ground (zero sequence) Differential Current (87GD)

• IPSlogic takes the contact input status and function status and generates

outputs by employing (OR, AND, and NOT) boolean logic and a timer.

Integrated Protection System® for Generators of All Sizes

Expanded I/O (15 additional Output contacts and 8 additional control/status Inputs).

• Exceeds IEEE C37.102 and Standard 242 requirements for generator protection

• Protects generators of any prime mover, grounding and connection type

• Provides all major protective functions for generator protection including

Out‑of‑Step (78), Split‑Phase Differential (50DT), Under Frequency Time

Accumulation (81A), Inadvertent Energizing (50/27) and Turn‑to‑Turn Fault (59X)

• Expanded IPScom® Communications Software provides simple and logical setting

and programming, including logic schemes

• Simple application with Base and Comprehensive protection packages

• Load encroachment blinders and power swing blocking for system backup

protection (21) to enhance security during system abnormal conditions

• Options: Ethernet Connection, Field Ground/Brush Lift‑Off Protection

(64F/B), 100% Stator Ground Fault Protection by low frequency

injection (64S) and Expanded I/O (15 additional Output Contacts

and 8 additional Control/Status Inputs)