Beckwith M-2001B Digital On Load Voltage Regulating Controller

Beckwith M-2001B Digital On Load Voltage Regulating Controller

Product basic positioning

M-2001B is a microprocessor based universal on load tap changer (LTC) controller that is compatible with various types of distribution tap changers, line regulators, and can directly replace mainstream old-fashioned tap changer controllers on the market; Integrating voltage regulation, parallel balancing, metering and recording, remote communication, fault alarm, and data storage, supporting 50/60Hz power grid, UL certification, original manufacturing in the United States, 5-year warranty for the whole machine, and possessing two US patents.

Core voltage regulation setting parameters (core regulation function)

1. Voltage reference and bandwidth

Bandcenter voltage: 100~135Vac, step size 0.1V;

Bandwidth (adjust dead zone bandwidth): 1~6V, step size 0.1V.

2. Line voltage drop compensation LDC

R/X independent impedance compensation: ± 24V, 1V step;

Z total impedance compensation: 0~24V boost compensation, 1V step.

3. Voltage regulation delay logic

Timing delay: 1-120s, 1-second step;

Inverse time delay: 1-120s, 1-second step;

Gear interval delay (sequential voltage regulation mode): 0-60s, waiting for multiple consecutive adjustment time intervals.

4. Optional output modes

Continuous output: continuously outputting up/down signals when the voltage exceeds the limit;

Pulse output: Pulse duration of 0.2~12s, adjustable at 0.1s.

5. Reverse power control (reverse flow scenario)

There are four modes: ignore reverse power, lock voltage regulation, reverse independent voltage regulation, and return to the middle gear; The single-phase voltage regulator supports reverse independent setting of PT without power supply side.

6. Voltage protection and fallback

Overvoltage/undervoltage limit: 95~135Vac, 0.1V step;

Overvoltage fallback dead zone: 1~4V;

Three level independent voltage reduction function, each level can set a reference voltage reduction of 0% to 10%.

7. Current lockout voltage regulation

Overcurrent lockout threshold adapted to CT specifications:

0.2A CT：200~640mA； 1A CT：1.0~3.2A； 5A CT：5.0~16.0A， Automatic prohibition of tap changer operation when current exceeds the standard.

Parallel balancing scheme for transformers (three mainstream methods)

Circulation method (standard): equipped with M-0115A parallel balancing module to collect circulation and balance each gear shift;

Master slave external loop method: external master slave interlocking hardware is used to achieve synchronous gear adjustment;

Δ VAR reactive power balance method

Δ VAR1: needs to be paired with M-0115A;

Δ VAR2: No need for additional balancing modules, simplified set;

Except for Δ VAR2, it is recommended to use M-0127 overcurrent relay for fault protection in other parallel schemes.

Measurement, metrology, and data recording functions

1. Real time full battery measurement

Local voltage, compensated load center voltage, line current, active kW/MW, reactive kVAr/MV A, apparent kVA/MVA, power factor, system frequency; Support CT-VT phase compensation from 0 ° to 330 ° (30 ° level).

2. Quantity measurement

The integration interval can be selected from 15/30/60 minutes, recording the maximum current, active power, reactive power, apparent power, and corresponding power factor at that time.

3. Extreme value band time scale storage

32 second average minimum/maximum voltage; All extreme load values within the demand cycle shall be archived with date and time stamps.

4. Harmonic analysis (with TapTalk software)

Can analyze the total harmonic distortion THD of voltage and current from 1st to 31st order; Record the number of actions for each tap position and support zeroing.

5. Counting management

Total operation counter: optional counting for every 1/2 gear adjustment, supporting preset initial values;

Resettable backup counter for maintenance statistics.

Hardware input/output specifications

1. Power input

Control power supply: rated 120Vac, 90~140Vac available, power consumption ≤ 8VA; 50Hz models 45~55Hz, 60Hz models 55~65Hz; short-time withstand voltage 2 times 1s, 4 times 1 cycle; Taken from the busbar PT.

Tap changer motor power supply: 120~240Vac, maximum 6A driving capacity.

2. CT current input (two channels of 0.2A full range)

Line voltage drop compensation CT: load ≤ 0.03VA, long-term 0.4A, short-term 4A/1s tolerance; 5A on-site CT with M-0121/M-0169 auxiliary CT converted to 0.2A;

Parallel circulating current CT: load ≤ 0.03VA, tolerance parameters as above.

3. Output circuit

Upshift RAISE, downshift LOWER main drive output: capable of carrying 120~240Vac, 6A motor load;

Alarm contact: 1 programmable normally open, 1 self-test normally closed, 3A on/off at 120Vac;

4. External switch input

External automatic voltage regulation locking, sequential voltage regulation reset, AUTO/OFF/MAN mode position feedback.

Front panel human-machine interaction

Buttons: UP (U), DOWN (D), ENTER (E), 2-line 16 character LCD menu;

Permission: Two level password protection, distinguishing viewing/modifying permissions;

Status LED: Four indicator lights for over limit rise, over limit fall, reverse power, and CPU normal.

Complete communication system (core remote capability)

1. Dual communication ports

COM1 (top rear): optional RS232/RS485/fiber ST;

COM2 (front end): local debugging, firmware upgrade, fixed RS232;

Only one communication channel is activated at the same time.

2. Support industrial protocols

BECO2200、BECO2179、Cooper2179、GP2179、DNP3.0、MODBUS、UCA2.0。

3. Supporting upper software M-2029A TapTalk ®

Function: Remote reading and writing of all fixed values, real-time power viewing, harmonic analysis, gear record export, firmware on-site online upgrade, broadcasting voltage reduction/locking instructions, multi device networking management (addresses 1-200).

4. Four types of networking topologies

PC directly connected to RS232 (up to 50 feet);

Remote dial-up with modem;

RS485 two-wire bus (terminal 120 Ω matching resistor);

ST multimode fiber optic loop for long-distance isolated communication.

5. Remote operation capability

Remote modification of all setting values, manual lifting of tap changers, reading of alarm and extreme value records, and batch issuance of control commands.

Alarm and location monitoring

1. Programmable alarm triggering conditions

Communication lockout, over limit voltage regulation lockout, over limit voltage regulation lockout, three-level voltage reduction action, reverse power, overcurrent, upshift limit, downshift limit, and overall self-test fault.

2. Tap gear acquisition

Transformer: optional M-2025B current loop position module;

Single phase voltage regulator: internal logic self tracking gear, no need for external sensors.

Environmental, safety regulations, and mechanical parameters

Temperature and humidity: -40 ℃~+80 ℃, maintaining accuracy, up to 95% no condensation, PCB anti mold coating;

Immunity standards: ANSI/IEEE C37.90.1 surge, IEC 1000-4-2 electrostatic, RF radiation immunity; Input and output withstand voltage of 1500Vac to ground for 1 minute; Excluding communication ports;

Physical dimensions: width 10.81cm x height 21.6cm x depth 7.62cm; net weight 1.67kg, transportation 3.03kg;

Install standard panel installation, and the matching conversion panel can directly replace the old-fashioned voltage regulator controller.