Voltage testing device UHV-1200

currentPC-controllablecomputer-controlled

Product introduction
The UHV-1200 is a microcomputer relay protection tester for secondary injection that combines configurable voltage and current outputs up to 6 phases. It supports multiple output modes (conventional 4P/3P, 6P, combined 6P/12P) and is designed for on‑site verification of relay settings, transformer differential tests, fast bus transfer and auto‑reclose checks.

Product features

• Flexible output configuration: up to 6‑phase voltage and 6‑phase current with multiple user‑configurable modes.
• Modular linear power amplifiers delivering low‑distortion, high‑fidelity waveforms.
• DSP‑based control and high‑resolution D/A conversion for accurate waveform generation.
• Compact, lightweight and portable design for field and mobile testing.
• Comprehensive software suite: automated test routines, fault simulation, vector display and report generation.
• Independent adjustable DC supply (110V/220V) for auxiliary tests.
• USB and standard communication interfaces for PC integration and data transfer.
• Built‑in protections: thermal management, soft‑start, diagnostics and output lockout.

Core functionality

• Multi‑channel analog outputs (AC/DC current and voltage, phase signals) to simulate operating states and typical faults (overcurrent, undervoltage, differential, distance).
• Precise action‑time measurement and action‑value verification for relay timing and sensitivity checks.
• Logic testing to validate multi‑stage protection, interlocks and auto‑reclose sequences.
• Data recording, analysis and report generation for traceability and trend evaluation.

Application scenarios

• Commissioning and acceptance tests of protection relays and schemes.
• Periodic maintenance and verification on substations, switchgear and protection panels.
• Post‑fault analysis: reproduce fault conditions to investigate misoperations or drift.
• End‑to‑end protection transmission testing from relay sensing to circuit‑breaker tripping.

Frequently asked questions

• What protection types can be tested? Line, transformer, busbar, generator, motor, differential, distance, overcurrent and load‑shedding devices.
• Why might a relay not operate during a test? Check wiring, parameter settings, selected test mode and I/O connections.
• No output voltage from the tester: verify software parameters, fuses, output switch and voltage wiring.
• Is grounding required? Yes — correct grounding is essential for measurement accuracy and operator safety.
• Reduced repeatability of action time: may be caused by auxiliary supply fluctuations, poor contacts, internal faults or EMI.

Technical specifications (excerpt)

• Model: UHV-1200
• Current/voltage channels: standard 6 phases
• AC current per phase: 0–30 A (RMS); 3‑phase mode per phase: 0–60 A; 6‑phase parallel: 0–180 A
• DC current per phase: 0–±10 A (accuracy level 0.5)
• AC phase voltage: 0–120 V (RMS); line voltage: 0–240 V
• DC phase voltage: 0–±160 V; line DC: 0–±320 V
• Phase current max power: 450 VA; 6‑phase parallel max power: 1000 VA (allowable time ~10 s)
• Frequency range (fundamental): 0–1000 Hz; harmonic support: up to 20th order
• Switch inputs: 8; switching outputs: 4 pairs (DC: 220 V/0.2 A; AC: 220 V/0.5 A)
• Time measurement range: 0.1 ms–9999 s; accuracy <0.1 ms