Megger SMRT43D Relay Protection Test System
| Brand | Megger |
|---|---|
| Origin | United Kingdom |
| Model | SMRT43D |
| Output Channels | 4 Voltage, 3 Current (expandable to 6 current via VIGEN channel conversion) |
| Max Current Output | 135 A (single-phase, 900 VA peak) |
| Max Voltage Output | 300 V AC (per channel, 150 VA) |
| Touchscreen Display | 7-inch full-color high-resolution TFT LED |
| Compliance | EN 61010-1, EN 61326-2-1, EN 61000-4-x, IEC 61850 GOOSE/SV support |
| Operating Temperature | 0–50 °C |
| Weight | 13.2 kg (with 3 VIGEN modules) |
| Dimensions | 337 × 172 × 273 mm (W×H×D) |
Overview
The Megger SMRT43D Relay Protection Test System is a high-fidelity, portable, multi-channel secondary injection test platform engineered for precision validation of modern protective relays—including electromechanical, solid-state, microprocessor-based, motor overload, and differential protection devices. Built upon Megger’s proprietary VIGEN (Voltage-Current Generator) architecture, the SMRT43D delivers synchronized, phase-controlled, and GPS-time-stamped analog outputs—enabling rigorous end-to-end testing of IEC 61850-compliant digital substations, distance and directional overcurrent relays, transformer differential schemes with harmonic restraint, and transient-responsive protection logic. Its core measurement principle relies on digitally synthesized, fully regulated voltage and current sources with real-time waveform generation, closed-loop amplitude and phase control, and hardware-level output protection—ensuring metrological integrity across load impedance variations and dynamic fault simulations.
Key Features
- Integrated SmartTouch Interface™: Second-generation graphical touchscreen UI enabling fully autonomous manual, semi-automatic, and automated test execution—no external PC required for basic relay timing, pickup/dropout, and characteristic curve verification.
- Modular VIGEN Architecture: Up to three VIGEN modules provide 4 independent voltage channels and 3 high-power current channels; voltage channels can be reconfigured as additional current sources—enabling up to six simultaneous current outputs for three-phase differential or harmonic-injection testing.
- High-Power Output Capability: Each current channel delivers 30 A continuous @ 200 VA RMS (50 V compliance), with short-duration peaks of 45 A @ 300 VA RMS; parallel operation of all three current channels supports 135 A @ 900 VA RMS for instantaneous overcurrent relay validation.
- IEC 61850 Integration: Native support for GOOSE message configuration, SV (Sampled Values) simulation, and time-synchronized testing via IEEE 1588 PTP or GPS input—fully compliant with IEC 61850-10 conformance testing requirements.
- Rugged Field-Ready Design: Fiberglass-reinforced polymer enclosure rated for transport per ISTA 1A and drop-tested per IEC 60068-2-32; operating temperature range of 0–50 °C and 5–90% RH non-condensing ensures reliability in utility switchyards and industrial substations.
- Comprehensive I/O Expansion: Dual binary inputs/outputs (300 V AC/DC, 8 A), optional STVI Ethernet port for handheld remote control, PoE-enabled STVI interface, and eight auxiliary binary monitoring inputs for auxiliary contact verification and sequence-of-events recording.
Sample Compatibility & Compliance
The SMRT43D is validated for testing a broad spectrum of protection devices—including ANSI/IEEE C37.90-classified overcurrent, undervoltage, reverse power, synchronism-check, and distance relays—as well as IEC 60255-series electromechanical and numerical units. It meets safety and EMC requirements per EN 61010-1 (CAT II 600 V), EN 61326-2-1 (industrial immunity), and EN 61000-4-2 through -4-11 for electrostatic discharge, radiated RF, fast transients, surge, and magnetic field immunity. For regulated environments, its firmware and software architecture support audit-ready test logging, electronic signatures, and 21 CFR Part 11–compliant data integrity when used with RTMS (Relay Test Management Software) under GLP/GMP workflows.
Software & Data Management
The SMRT43D operates natively with Megger’s RTMS (Relay Test Management Software), which provides pre-built test templates for ANSI, IEC, and IEEE relay standards—including inverse-time curves (IEC 60255-151), distance zone characteristics, and harmonic restraint ratios. AVTS (Advanced Visual Test Software) extends functionality with customizable waveform scripting, real-time oscilloscope-style visualization, and automated report generation in PDF or CSV format. All test data—including timestamped waveforms (up to 256,000 samples/channel), relay response timing, and GOOSE/SV traffic logs—are stored locally on the device or exported via USB 2.0 or Ethernet. Firmware updates and configuration backups are managed through secure HTTP/HTTPS interfaces with role-based access control.
Applications
- Commissioning and periodic maintenance of line, busbar, transformer, and generator protection schemes.
- Verification of trip logic, time-current characteristics, and setting accuracy for electromechanical and digital relays.
- End-to-end testing of IEC 61850 substation automation systems—including interoperability between merging units, intelligent electronic devices (IEDs), and station controllers.
- Harmonic injection testing for transformer differential relays with second-harmonic or waveform distortion blocking algorithms.
- Transient simulation for reclosing schemes, auto-transfer switches (ATS), and breaker failure protection logic.
- Validation of synchrocheck and vector group verification in parallel feeder applications.
FAQ
Can the SMRT43D perform GPS-synchronized, multi-unit end-to-end testing?
Yes—the SMRT43D supports IEEE 1588 Precision Time Protocol (PTP) and external GPS timing inputs to synchronize waveform playback and event triggering across multiple SMRT units linked via Ethernet.
Is IEC 61850 GOOSE configuration supported out of the box?
GOOSE configuration requires the optional AVTS software package with Megger’s IEC 61850 GOOSE Configurator module (part no. 1002-103 or 1001-106), which integrates directly with RTMS for message mapping and subscription management.
What is the maximum continuous current per channel, and how is thermal derating handled?
Each current channel delivers 30 A continuous @ 200 VA RMS at ≤50 °C ambient; internal thermal sensors automatically reduce output if sustained loading exceeds safe junction temperatures—no user intervention required.
Does the SMRT43D support DC battery simulation for relay power supply testing?
Yes—the dedicated AC/DC voltage source provides 0–250 V DC @ 100 W / 3.33 A, configurable as a variable battery emulator for DC-powered protection panels and auxiliary relays.
How is traceability ensured for calibration and test records?
All output channels are factory-calibrated with NIST-traceable standards; RTMS generates tamper-evident test reports with embedded metadata (operator ID, instrument serial, calibration due date, and environmental conditions) meeting ISO/IEC 17025 documentation requirements.
