Lightweight Relay Tester

MOEORW-W2000V is a lightweight all-in-one secondary injection test device independently developed by Wuhan Moen Intelligent Electric Co., Ltd. It adopts 6-phase voltage & 6-phase synchronous independent output architecture, high-fidelity linear power amplifier and high-speed DSP digital control platform. The equipment integrates full test modules for power system protection relays, covering AC/DC characteristic test, differential protection, distance/zero-sequence protection, auto-switch-on backup, fast transfer, synchronizing, inverse time, harmonic analysis and COMTRADE waveform playback.

With compact integrated mechanical structure, built-in 10.1-inch industrial touch screen, trackball and dedicated operation keyboard, the tester supports wired Ethernet, dual-mode WiFi communication and GPS synchronous triggering. It is equipped with abundant binary input/output terminals and independent adjustable DC auxiliary power supply, suitable for field mobile calibration of transformer differential, line distance, directional power, low-frequency load shedding, bus auto-switch, generator synchronizing and other protection devices in substations, power plants and industrial power distribution stations. All output signals reach Class 0.1 precision, featuring low waveform distortion, strong anti-interference and complete hardware & software self-protection mechanisms.

Analog Output Parameters

Binary IO & Timing Index

Mechanical & Communication Parameters

Hardware Design Advantages
1．6U+6P Full-channel Independent Output Architecture Supports flexible arbitrary combination of voltage and current channels, natively compatible with three-winding transformer differential test, factory power fast transfer and busbar auto-switch test without additional external expansion modules. Multi-current parallel and multi-voltage series wiring is supported to expand effective output amplitude on site.
2．High-Fidelity Linear Power Amplifier Module Adopts linear amplification circuit instead of switching power amplifier, eliminating high/middle frequency electromagnetic interference to field secondary equipment. Smooth sine waveform output is maintained from microamp small signals to maximum rated current with negligible distortion.
3．DSP High-speed Real-time Control Platform High-resolution D/A conversion chip matched with digital signal processor realizes high-speed real-time operation, ensures stable waveform output and fast dynamic response during step change, ramping and state switching test processes. High-precision discrete signal processing improves test repeatability.
4．Integrated Lightweight Mechanical Structure Highly integrated miniaturized layout with optimized heat dissipation air channel, reducing overall weight and volume for field portable mobile testing. No external cooling fan noise interference during long-time continuous operation.
5．Multi-layer Self-protection System Hardware power soft-start circuit, over-current, over-voltage and short-circuit protection at each output channel; embedded software fault self-diagnosis and output locking logic automatically cut off analog output when abnormal signals are detected to protect the tester and DUT.
6．Complete Multi-mode Communication Ports Dual USB for file import/export and peripheral connection; Ethernet for stable fixed-location PC control; WiFi supports AP router mode and STA terminal mode, enabling wireless remote operation by laptop; GPS interface realizes multi-unit synchronous coordinated testing for two-terminal line protection joint commissioning.
7．Dual-mode Binary Input Identification Circuit 10 groups of binary input automatically identify dry contact and DC potential contact signals, eliminating manual jumper switching before wiring and simplifying field wiring procedures. 8 groups of isolated binary output simulate circuit breaker position, lockout and interlock auxiliary signals.
 

Software Functional Advantages
1)Full-spectrum Standard Test Modules Integrated Built-in 21 dedicated test modules covering all mainstream power protection types: AC Ramp Test, DC Test, State Sequence, Harmonic Superposition, Transformer Differential, Generator Differential, Distance & Zero-sequence Protection, Power Direction, Busbar ATS, Fast Bus Transfer, Under/Over Frequency Load Shedding, Synchronization Check, Impedance Characteristic Scan, Inverse Time Curve, COMTRADE Waveform Playback, Power Swing Simulation etc. Each module supports independent parameter template saving and one-click recall.
2)Automatic Full-set Protection Calibration Logic Supports unidirectional/binary dichotomy search algorithm for protection action boundary scanning, automatically records action value, return value, action/return time and calculates return coefficient. Real-time sequence component, line voltage and three-phase power data visualization during test execution.
3)COMTRADE Fault Waveform Analysis & Playback Compatible standard CFG/DAT fault recording files, supports manual selection of playback time window, PT/CT ratio conversion and multi-channel signal mapping, reproduces actual grid transient fault waveforms for fault replay verification of relay devices.
4)Multi-state Sequential Test Editor Customizable multi-step state sequence with four trigger modes: fixed time delay, binary contact action, manual TAB key trigger and GPS second pulse synchronization. Each state independently configures analog quantity and binary output status to simulate reclosing, post-acceleration and conversion fault complete test flow.
5)Built-in Harmonic Superposition Engine Each voltage/current channel independently configures DC offset and 1–24 harmonic amplitude/phase percentage superposition, realizes second-harmonic braking, fifth-harmonic blocking and transformer magnetizing inrush simulation tests.
6)Data Recording & Standard Report Export Real-time storage of all test raw data, waveform screenshots and action records; supports on-device report preview, PDF report one-click generation and offline printing; all test records can be exported via USB storage for archiving and factory acceptance.
7)Intelligent Auxiliary Operation Tools Built-in short-circuit impedance automatic calculation tool, real-time waveform monitoring window, parameter batch modification via right-click shortcut menu, software one-click factory parameter reset and firmware upgrade function via local .t00 upgrade file.

MOEORW-W2000V operates based on digital secondary injection simulation principle:
1.The built-in industrial host receives user-set test parameters via touch screen or remote PC software, transmits digital amplitude, phase, frequency and harmonic control instructions to the DSP control unit.
2.DSP performs real-time digital signal calculation, generates discrete digital waveform data and transmits to multi-channel high-precision D/A converters.
3.Analog voltage/current signals converted by D/A are amplified by linear power amplifier modules to reach rated output power, then transmitted to external relay protection devices through output terminals.
4.The 10-channel binary input circuit collects contact action signals from tested relays, transmits action timing and state change data back to the main control unit for real-time recording and judgment.
5.8-channel binary output isolation circuit outputs auxiliary switching signals controlled by software logic to simulate circuit breaker auxiliary contacts, lockout signals and interlock conditions.
Timing unit synchronized with GPS clock records the time difference between signal output and protection contact action, completes automatic calculation of protection action time, impedance and characteristic curve parameters.

1.Binary Output Terminal Block: 8 groups of isolated switch signal output terminals
2.Binary Input Terminal Block: 10 groups of dual-mode contact acquisition terminals with public common terminal
3.10.1-inch TFT Industrial LCD Touch Screen: Main human-machine interaction display
4.Trackball Control Mouse: For cursor movement, parameter modification and test trigger operation
5.Dedicated Function Keyboard: Shortcut keys for test start/stop, step increment/decrement and state switching

• Power system substation relay protection routine calibration: distance protection, zero-sequence protection, directional power, reclosing and post-acceleration test
• Power plant main equipment protection commissioning: generator differential, transformer two/three-winding differential, synchronizing device, fast factory power transfer test
• Distribution station busbar ATS (auto-switch backup power) complete function test
• Low/medium voltage distribution protection: inverse time overcurrent, low-frequency under-voltage load shedding, impedance characteristic relay test
• Transient fault replay analysis via fault recorder COMTRADE waveform files
• Factory inspection of microcomputer protection relays, electromechanical relays and auxiliary control relays
• On-site joint debugging of double-ended transmission line protection with GPS synchronous triggering

1.MOEORW-W2000V Main Tester × 1
2.AC Voltage Output Test Cables (6 groups)
3.AC Current Output Test Cables (6 groups)
4.DC Auxiliary Power Wiring Harness
5.Binary Input/Output Connection Wires
6.GPS Synchronization Antenna
7.Ethernet Communication Cable
8.USB Data Transmission Cable
9.External Power Supply Cord
10.Printed English Operation Manual
11.Factory Calibration Test Certificate
12.Export Shockproof Plywood Transport Case

This tester complies with international and domestic power test instrument industry standards:
1.GB/T 7261-2016 General technical conditions for relay protection test devices
2.DL/T 624-2010 Technical specification for microcomputer relay protection test equipment
3.IEC 61850 auxiliary test compatibility standard
4.IEC 60044 Instrument transformer secondary signal simulation specification
5.COMTRADE IEEE Std C37.111 transient data file format standard

• Storage & Environment Store the equipment in dry, dust-free warehouse with ambient temperature -10℃ ~ +45℃; avoid long-term exposure to high humidity, corrosive gas and direct sunlight. Do not stack heavy objects on the transport case.
• Pre-operation Inspection Check all output cables for insulation damage before each test; confirm terminal screw fastening; inspect heat dissipation air inlet/outlet for dust blockage, clean regularly with dry soft brush.
• Post-test Maintenance Cut off power supply after finishing all tests, disconnect all external wiring; wipe the screen and panel with dry microfiber cloth, do not use alcohol or corrosive detergent.
• Long-term Idle Storage If idle for more than 30 days, power on for 30 minutes every two weeks to activate internal circuit components and prevent damp circuit board failure.
• Cable Preservation Classify and coil test cables separately after use, avoid sharp bending and extrusion of wire cores to prevent internal breakage.

1.12-month full free hardware warranty from delivery date, excluding damage caused by improper operation, over-load and man-made wiring error.
2.Lifetime free software function upgrade via official .t00 firmware file, remote technical guidance for upgrade operation.
3.Global remote online technical support via video call for parameter configuration and module operation training.
4.Paid on-site calibration, maintenance and customer-specific function customization service available upon demand.
5.Complete English operation documentation, parameter template library and technical operation video provided together with shipment.