SMC PTE-300-V Three-Phase Relay Protection Tester

Overview

The SMC PTE-300-V Three-Phase Relay Protection Tester is a digitally controlled, portable instrumentation platform engineered for precision verification and functional testing of electromechanical, static, and numerical protective relays used in power system protection schemes. Based on high-fidelity digital signal synthesis and Class I amplifier architecture, the device generates three fully independent, programmable AC output channels—each capable of operating as either voltage or current source with synchronized phase, amplitude, and frequency control. Its core measurement principle relies on real-time digital waveform generation via an Intelligent Generator Module (IGM), ensuring stable amplitude accuracy (±0.2% of reading), low harmonic distortion (<0.5% THD at rated output), and dynamic response suitable for transient relay behavior evaluation—including pickup/dropout timing, directional element sensitivity, and inverse-time curve validation per IEC 60255 and IEEE C37.112 standards.

Key Features

• Three independent, fully isolated output channels—configurable as voltage (0–300 V AC) or current (0–8 A AC) sources with per-channel amplitude, phase, and frequency control.
• Wide frequency range: 40–420 Hz, supporting standard power frequencies (50/60 Hz), harmonic injection, and specialized testing such as generator protection (e.g., 16.7 Hz for traction systems).
• High-resolution phase angle control: 0.1° resolution across 0.0–359.9°, enabling precise directional relay and synchrocheck testing.
• Digital closed-loop calibration architecture—output parameters adjusted via firmware; no manual potentiometer or hardware recalibration required.
• Reversible output configuration: supports both conventional and differential relay testing setups, including cross-phase injection and zero-sequence simulation.
• Integrated external reference inputs for frequency synchronization and phase locking—critical for testing relays in live-grid environments or multi-instrument coordinated tests.
• Rugged, field-deployable enclosure (22 kg, IP2X-rated) with ergonomic handle and reinforced chassis—designed for repeated transport between substation sites and lab environments.

Sample Compatibility & Compliance

The PTE-300-V is compatible with all major classes of protective relays deployed in transmission, distribution, and industrial power systems—including overcurrent (OC), earth fault (EF), distance (IMP), differential (DIFF), directional overcurrent (DOC), and synchrocheck relays. It meets electromagnetic compatibility requirements per EN 61000-6-2 (immunity) and EN 61000-6-4 (emissions). Its output stability and traceable accuracy support compliance with IEC 61850-10 conformance testing procedures, particularly for GOOSE and SV message timing validation when used with auxiliary timing interfaces. The device is also routinely employed during GLP-aligned commissioning and periodic maintenance per IEC 62443 cybersecurity assessment protocols, where deterministic stimulus generation is essential for relay logic validation.

Software & Data Management

The PTE-300-V interfaces with Windows-based SMC TestSuite software via RS-232 or USB. This application enables full remote control, automated test sequence execution (e.g., ANSI/IEEE C37.112 time-current curves), result logging, and report generation in PDF/CSV formats. All test configurations—including multi-step ramp tests, harmonic superposition, and sequential fault simulations—are stored as reusable templates. Audit trails include user ID, timestamp, parameter set version, and output verification checksums—supporting 21 CFR Part 11-compliant environments when paired with appropriate IT governance controls. Firmware updates and calibration certificates are managed through the same interface, ensuring version-controlled metrological integrity across instrument lifecycles.

Applications

• Functional testing of single- and three-phase overcurrent, earth leakage, and directional relays in utility substations and industrial switchgear.
• Commissioning verification of line differential and busbar protection schemes requiring synchronized three-phase stimulus.
• Validation of relay response under non-standard frequencies (e.g., railway traction networks, marine generators).
• Calibration and performance verification of handheld relay test sets using the PTE-300-V as a master reference source.
• Education and training in power engineering labs—demonstrating relay coordination, zone selectivity, and fault loop analysis.
• Support for IEC 61850 GOOSE/SV interoperability testing when combined with time-synchronized Ethernet interfaces (via optional gateway modules).

FAQ

Does the PTE-300-V support automatic test sequencing for ANSI/IEEE time-current curves?
Yes—SMC TestSuite includes preloaded templates for common inverse-time curves (IEEE C37.112-2018), with adjustable pickup thresholds, time multipliers, and tolerance bands.
Can it generate zero-sequence voltage and current without external transformers?
Yes—the three-channel architecture allows direct synthesis of balanced or unbalanced sequences (e.g., 3V₀ = Vₐ + Vᵦ + V꜀) via coordinated phase and amplitude programming.
Is firmware calibration traceable to national metrology institutes?
Calibration coefficients are stored in non-volatile memory and can be linked to accredited calibration reports issued by SMC’s EU-accredited service center (DAkkS No. D-K-19047-01-00).
What safety certifications does the unit hold?
It complies with IEC 61010-1:2010 (CAT III 300 V) for measurement circuits and carries CE, UKCA, and RoHS markings.
Is remote operation possible over LAN or Wi-Fi?
Native Ethernet/Wi-Fi is not built-in, but RS-232-to-Ethernet gateways compliant with Modbus RTU or TCP are widely deployed in utility SCADA environments for integration.