Beckwith M-2001C digital on load voltage regulator controller

Beckwith M-2001C digital on load voltage regulator controller

Product Overview

The M-2001C is a new generation of Beckwith microprocessor based LTC on load voltage regulation controller, suitable for main transformer on load tap changers and substation/single-phase line regulators. It has been fully upgraded based on the M-2001B and is divided into four hardware versions: Comprehensive full function, Base-T transformer specific, Base-RS communication voltage regulation, and Base-R simple voltage regulation. It can be paired with an adapter panel to directly replace old-fashioned voltage regulation devices on the market; Supports 50/60Hz dual standard, with complete voltage regulation, parallel balancing, power acquisition, data storage, multimedia SCADA communication, fault alarm functions, matched with TapTalk configuration and TapPlot analysis two sets of upper software, 5-year warranty for the whole machine, dual US patents, and has passed the full set of power safety certification from cULus, IEC, and ANSI.

Function differentiation of the four major versions (based on core selection criteria)

1. Comprehensive (fully functional)

The most comprehensive functionality, supporting both transformer and regulator scenarios; Dual communication port COM1 (RS232/485/fiber)+COM2 local port, optional RJ45 Ethernet; Supports three parallel connections of circulating current/Δ VAR1/Δ VAR2, sequential/non sequential voltage regulation, two programmable alarms, external gear sensors, SCADA heartbeat, and backup DC power input, suitable for multiple main transformers in parallel and complete remote monitoring scenarios in power plants/substations.

2. Base-T (transformer specific)

Only COM2 local communication port; Supports parallel connection of transformers, sequential/non sequential voltage regulation, two-way alarm, without independent SCADA communication COM1, suitable for local control of a single transformer.

3. Base RS (voltage regulator specific, with SCADA)

COM2 local port+COM1 remote RS485/fiber optic; Only supports sequential voltage regulation, no circulating parallel input, independent alarm contacts, suitable for remote monitoring of voltage regulators in distribution networks.

4. Base-R (simple regulator without remote SCADA)

Only COM2 local port, only sequential voltage regulation, no parallel, alarm, SCADA related functions, only basic voltage regulation, used for local use of small single-phase voltage regulators.

Standard universal voltage regulation setting parameters (standard for all models)

Voltage control interval

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

Bandwidth dead zone: 1~10Vac (maximum 6V for M-2001B, expandable for this model), 0.1V step.

Line voltage drop compensation LDC

R/X independent compensation (± 24V, 1V range), Z total impedance boost compensation (0~24V); Support CT-VT phase compensation of 0 °~330 ° (30 ° first gear) and VT ratio correction of ± 15V.

Voltage regulation delay logic

Timer/inverse time delay 1-120s; interval delay 0-60s (sequential mode with multiple continuous adjustments); Output optional continuous/pulse (pulse 0.2~12s adjustable).

Reverse flow control (distributed photovoltaic reverse adaptation)

Transformer 4 modes: lockout/ignore/return to center/distributed generation; Single phase voltage regulator with 5 modes, supporting reverse independent setting without the need for power side PT.

Voltage protection and voltage reduction function

Independent setting of over/under voltage 95~135Vac; Overvoltage fallback dead zone of 1-4V; three-level independent voltage derating (0-10% reference for each level, with automatic shutdown timer of 1-999min); Hard limit for upper and lower gears.

Overcurrent lockout voltage regulation

Suitable for 0.2A/1A/5A CT, excessive operation of tap changer is prohibited; External hard contacts can forcibly lock automatic voltage regulation.

Three parallel balancing schemes for transformers (supported by Com/Base-T)

Circulation method (standard configuration): equipped with M-0115A parallel balancing module to collect circulation, and multiple main transformers synchronously adjust gears;

Δ VAR1: M-0115A is required, with a balanced reactive power difference;

Δ VAR2: No external balancing module required, only available in parallel scenarios with two transformers;

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

5、 Measurement, metrology, data storage and analysis

1. Real time full power collection

Local voltage, compensated load center voltage, line current, active/reactive/apparent power, power factor, frequency; Supports accurate calculation of source side voltage using both A/B voltage regulator models.

2. Demand and extreme value recording (with date and timestamp)

32 second short-term average: highest/lowest bus voltage;

15/30/60 minute demand cycle: maximum current, active power, reactive power, apparent power, and corresponding power factor;

3. Advanced data function (upper level TapTalk reading)

Harmonic analysis: THD total distortion of voltage and current from 1st to 31st order;

Gear statistics: Record the total number of actions for each tap gear and support zeroing;

Dual operation counter: can preset total counter and reset maintenance counter;

Noise compatible counting window: Contact jitter can also reliably identify gear movements.

Gear position acquisition scheme

Transformer scenario: optional M-2025B current loop conversion module+M-2948 rotation position sensor (4-20mA current loop output, supporting ± 8~± 16 levels, 1-3 neutral positions);

Single phase voltage regulator: built-in KeepTrack logic, no need for external sensors;

Neutral binary input, auxiliary Δ VAR2 parallel logic exit.

Input/output hardware specifications

Input circuit

Control power supply: 120Vac (90~140Vac wide), 50/60Hz optional, power consumption ≤ 8VA; supports M-2026/M-2027 backup 12V DC power supply (Com/Base RS optional);

Tap changer motor power supply: 120~240Vac, maximum 6A drive;

Two 0.2A CT inputs: line LDC current, parallel circulating current, load ≤ 0.03VA; 5A on-site CT with M-0121/M-0169 auxiliary CT;

Binary switch quantity: two-stage step-down input, neutral position, gear counting, self holding, non sequential/SCADA lockout input.

Output circuit

RAISE/OWER upshift/shift main drive: 6A@120 ~240Vac；

Self maintaining Seal in output, matched with motor locking plate;

Alarm contacts: 1 programmable alarm, 1 whole machine self-test fault contact;

Deadman power loss alarm output.

Human machine panel and display

Key: 4 keys (up/down/confirm/exit), two-level operation password permission;

Standard display screen: 2-line x 20 character LCD, working at -20~+70 ℃;

Optional VFD vacuum fluorescent screen: -40~+80 ℃ for extremely low temperature environments;

10 channel status LED: upshift limit exceeded, downshift limit exceeded, reverse power, LDC input, voltage reduction action, manual lockout, SCADA local lockout, COM1 transceiver, CPU normal.

Multimedia Communication System (Core Upgrade Point)

1. Port layout

COM2 (front fixed RS232): local debugging, firmware upgrade, only BECO2200;

COM1 (rear, Com/Base RS exclusive): optional RS232/two-wire RS485/ST fiber;

COM3 (Com exclusive optional RJ45 Ethernet 10Mbps): TCP/IP protocol.

2. Support industrial protocols

BECO2200, BECO2179, Cooper2179, GP2179, DNP3.0, MODBUS (serial port+Ethernet), AL/MOSS power specific DNP variant.

3. Supporting upper level software

M-2029A TapTalk: Remote reading and writing of fixed values, real-time power consumption, alarm reading, whole machine configuration printing, firmware online upgrade, multi device networking (addresses 1-200), broadcasting batch issuance of locking/voltage reduction instructions; Support dial-up, direct connection, fiber optic, 485 networking;

M-2829 TapPlot: gear action data plotting, trend analysis, report printing.

4. Featured SCADA functions

SCADA Heartbeat: Two sets of fixed value groups, with or without automatic remote communication switching;

Manual heartbeat timer: After remote switching to manual mode, the timer automatically switches back to automatic mode;

SCAMP function: remotely issue commands to switch the automatic/manual switch status of the panel.

Environmental, safety regulations, and mechanical parameters

temperature and humidity

LCD：-20~70℃； VFD：-40~80℃； Maximum 93% RH without condensation, PCB anti mold coating; Store at 5-40 ℃ and maintain the electrolytic capacitor every 3-5 years by powering on;

Safety regulations and anti-interference

Meet the requirements of IEC 60255 for complete insulation, impulse, electrostatic 8kV contact/15kV air, 4kV rapid transient; ANSI/IEEE C37.90.1 Surge 2500V oscillation, 5kV fast pulse; Input/output 1500Vac 1min withstand voltage, except for communication port; CULus, CSA industrial certification;

Physical dimensions: width 10.81cm x height 21.6cm x depth 7.62cm, net weight 1.67kg; standard panel installation, matching conversion board to replace old-fashioned controller.

Optional accessories

M-2025B (D) 4~20mA current loop conversion module (matched with M-2948 gear sensor);

M-2948 series rotary gear sensor (multiple gear and steering specifications);

M-2026 AC/DC backup power supply, M-2027 pure AC backup power supply;

RS485、 Fiber optic and Ethernet communication conversion accessories;

Old equipment renovation adapter panel.

Product Comparison M-2001B Core Upgrade Points

The bandwidth limit has been increased from 6V to 10V;

Add SCADA heartbeat, manual heartbeat, and SCAMP remote switch to manual mode;

Support VFD ultra-low temperature display screen;

Optional RJ45 Ethernet TCP/IP communication;

Add a backup DC power supply interface to prevent power loss in the fiber optic loop;

Distinguish between transformer/regulator specific versions, modularize functions to reduce costs;

Added TapPlot gear trend analysis software;

The counting window is resistant to contact jitter and automatically closes at a scheduled time due to three-level voltage reduction;

Improve the A/B voltage regulator model to achieve more accurate calculation of source side voltage.