Digital-Analog Integrated Relay Protection Tester

The MOEORW-WTM58 Digital-Analog Integrated Relay Protection Tester (also referred to as Digital-Analog Integrated Relay Tester, Digital-Analog Integrated Comprehensive Tester, or Integrated Digital-Analog Relay Tester) is a multifunctional comprehensive test platform that simultaneously meets the commissioning requirements of both smart substations and conventional substations. In the industry, this device is commonly known as a Smart Substation Relay Protection Tester, Optical Digital Relay Protection Tester, or Conventional Relay Protection Tester. Due to its simultaneous capability of digital message output and analog output, it is also widely called a Digital-Analog Integrated Comprehensive Relay Tester or Smart Integrated Relay Tester.

The product deeply integrates three core capabilities: IEC61850 digital message output, traditional high-power analog output, and small-signal output. It can be used independently as an Optical Digital Relay Tester, independently as a Conventional Relay Protection Tester, and also supports simultaneous output of digital and analog quantities, achieving a "one device, all scenarios covered" testing solution.

True Digital-Analog Integrated Architecture – One Device Covers All Scenarios

The device internally integrates a digital output engine, an analog power amplifier module, and a small-signal output circuit simultaneously. The three components are independent of each other and can operate separately or collaboratively. During testing, the device can output IEC61850 messages and traditional analog quantities simultaneously within the same project, without the need to switch hardware or change devices. Compared with traditional single-function testers, one set of equipment can meet the testing requirements of both conventional and smart substations, avoiding duplicate procurement and reducing capital investment costs. Whether used as an Optical Digital Relay Tester for smart substations or as a Conventional Relay Protection Tester for traditional substations, the MOEORW-WTM58 performs excellently, truly achieving multi-functionality in one device.

Metrology-Grade Output Accuracy with Traceable Data

The device employs high-fidelity linear power amplifier technology, eliminating high-frequency switching interference and delivering smooth, pure output waveforms with repeatability superior to switching-type amplifiers. Calibrated by nationally accredited third-party metrology institutions, the AC voltage/current output accuracy reaches ±0.05% (typical), phase accuracy ±0.01°, and frequency accuracy ±0.001Hz. Every device undergoes full-range, full-channel accuracy calibration before shipment, with calibration data traceable to national metrology standards, ensuring that on-site test data carries legal validity. This accuracy level places the device at the forefront among similar Digital-Analog Integrated Relay Testers.

Intelligent Configuration and Automated Testing – Greatly Improving On-Site Efficiency

The software system supports importing SCD, CID, and ICD configuration files, automatically parsing SMV and GOOSE parameters without manual entry. When configuration files are unavailable on-site, the "Network Detection" function automatically scans and identifies the SMV and GOOSE control block parameters of the protection device, completing configuration with one click. The system features over 18 professional test modules including distance protection calibration, zero-sequence protection calibration, differential protection testing, whole-set testing, and state sequence testing, supporting multiple test modes such as manual, automatic, trigger, and impulse. After test completion, Word/PDF format reports are automatically generated, allowing on-site personnel to complete the entire workflow from configuration to report output. This intelligent operation experience significantly lowers the usage threshold of the Smart Integrated Relay Tester.

Parallel Output of Multiple SMV and GOOSE Groups – Adapting to Complex Protection Logic

The system supports simultaneous configuration of up to 4 SMV control blocks, each independently setting sampling rate (standard 4000Hz), APPID, MAC address, SVID, channel count, and ratio, capable of simulating bus multi-interval merging unit output scenarios. GOOSE transceiver supports T0/T1/T2/T3 multi-stage interval time control. Binary inputs can subscribe to GOOSE signals, and binary outputs can simulate GOOSE messages. The system supports over 7 types of message anomaly simulations including test messages, frame loss, duplication, sequence reversal, false status changes, and heartbeat abnormalities, comprehensively evaluating protection device behavior under abnormal communication conditions. Whether used as an Optical Digital Relay Tester for message analysis or as a Digital-Analog Integrated Comprehensive Tester for system-level joint debugging, the device provides ample channel resources and flexible configuration capabilities.

High anti-interference structural design for stable operation in harsh working conditions

The complete unit features a fully enclosed metal shielded chassis, with critical circuits powered through graded isolation and multiple filtering and surge suppression circuits at the power input ports. As verified by standard electromagnetic compatibility testing, the RF field radiated immunity reaches level 10V/m, electrostatic discharge immunity reaches ±8kV (contact)/±15kV (air), and electrical fast transient/burst immunity reaches ±4kV. The device operates continuously and stably at ambient temperatures from -10°C to +50°C, suitable for outdoor substations, switching stations, and other sites with severe electromagnetic interference. This reliability design ensures that the Digital-Analog Integrated Relay Tester maintains stable output even under harsh operating conditions.

Multiple Synchronization and Triggering Methods – Meeting Loop-Back and Wide-Area Testing Requirements

The device features a built-in GPS receiver module and supports external optical IRIG-B and IEEE1588 (PTP) high-precision network synchronization clocks. In synchronized output mode, the device precisely flips the message sequence number at the exact second mark, ensuring strict synchronization between testers at both ends, meeting the stringent clock synchronization requirements of test scenarios such as pilot differential protection and line-side loop-back tests. This feature enables the Conventional Relay Protection Tester to upgrade to a smart substation testing tool without additional synchronization equipment, fully demonstrating its integrated advantages as a Digital-Analog Integrated Comprehensive Tester.

Smart Substation Relay Protection Commissioning

As an Optical Digital Relay Protection Tester, outputs IEC61850-9-2 or FT3 format sampled value messages, transmits and receives GOOSE binary signals, and completes individual debugging of merging units, intelligent terminals, and protection devices as well as whole-set interlocking tests.

Conventional Substation Relay Protection Commissioning

As a Conventional Relay Protection Tester, outputs 6-phase voltage (0～120V) and 6-phase current (0～30A/parallel 180A) analog quantities, completing calibration and operating characteristic tests for distance protection, zero-sequence overcurrent, compound voltage-blocked overcurrent, under-frequency/under-voltage, and other protection devices.

Transformer Protection Testing

Supports two-winding/three-winding transformer differential protection testing, featuring ratio restraint characteristic boundary searching and harmonic restraint coefficient automatic scanning and verification, adaptable to various Y/Δ connection methods and phase correction. In this scenario, the Digital-Analog Integrated Relay Tester can flexibly select digital or analog input methods to adapt to different models of transformer protection devices.

Line Reclosing and Permanent Fault Simulation

Simulates transient faults and permanent faults through the whole-set test module, fully testing reclosing action logic, synchronization/voltage-check conditions, and post-reclosing acceleration functions.

Digital Message Analysis and Network Detection

Real-time monitors SMV/GOOSE messages output by the tester itself or by external devices, parses key fields such as ASDU, APPID, MAC, and channel data, and supports generating standard PCAP files for Wireshark analysis. When configuration files are unavailable, automatically obtains protection device communication parameters through network detection. This feature enables the Optical Digital Relay Tester to simultaneously possess network analysis and fault diagnosis capabilities.

Small-Signal Output Testing

Outputs 4～20mA or 0～10V small signals for testing merging units, digital electricity meters, intelligent terminals, and other devices using small-signal interfaces, with flexibly configurable ratios. In this scenario, the Digital-Analog Integrated Comprehensive Tester fills the gap where traditional testers cannot output small signals.

Optical Power Testing

Quickly measures optical power values of fiber optic links through the optical power test module, assessing fiber connection quality and optical module operating status, assisting in fault localization. This function is a standard requirement for Smart Substation Relay Protection Testers.

University Power Laboratories and Research Teaching

Integrates digital, analog, and small-signal capabilities, meeting the teaching demonstration and experimental research requirements of power system relay protection, smart substation technology, digital communication, and other courses. A single Digital-Analog Integrated Comprehensive Relay Tester can support the construction of multiple teaching experiment platforms.

The enterprise holds ISO9001 Quality Management System certification and ISO14001 Environmental Management System certification. Products have been tested by China Electric Power Research Institute and provincial metrology institutions, fully complying with the requirements of DL/T 624-2023 "Technical Specifications for Microprocessor-Based Relay Protection Test Equipment." Products have been exported to over 20 countries and regions across Southeast Asia, the Middle East, Africa, and South America, conforming to IEC 61850 international standard communication protocols and local grid access requirements. Whether used as a Smart Substation Relay Protection Tester or a Conventional Relay Protection Tester, the device meets international mainstream technical standards.