Network tester UHV-803

phase sequenceDACphase

Product Introduction
The UHV-803 three-phase relay protection tester is a compact microcomputer-based tester designed per DL/T624-1997. It uses DSP+FPGA architecture, true 16-bit DAC output, modular high-fidelity linear high-power amplifiers, 8.4 inch TFT color display (800×600), industrial keyboard/mouse and Windows XP OS. It can operate standalone or connected to a PC, offering field-portable precision and functions of larger testers.

Product Features

• Flexible multi-channel outputs: configurable 4-phase voltage and 3-phase current outputs; supports standard tests and specialized transformer differential and fast transfer switching tests.
• PC control: direct connection to laptop/desktop for automated sequences, stable execution and data export.
• Linear high-fidelity amplification: non-switching amplifiers minimize HF/MF interference across current ranges.
• Portable DSP host: high-speed DSP processing produces accurate waveforms in a compact unit suitable for field use.
• Intelligent test software: protection setting checks, fault replay, data logging, vector diagrams and automatic report generation.
• Dual DC auxiliary outputs: integrated 110V/220V DC for auxiliary power.
• Expanded connectivity: USB ports for device communication and data transfer.
• Comprehensive protection: thermal management, soft-start and diagnostic safeguards.

Product Parameters
AC current output
Output accuracy: 0.2°; Phase current (RMS): 0–40 A; 3-phase parallel current (RMS): 0–120 A; Long-term allowable phase current: 10 A; Max output power per phase: 420 VA; Max output power for 3 parallel: 900 VA (max permitted time 10 s); Frequency range (fundamental): 0–1000 Hz; Harmonic orders: 1–20.

DC current output
Output accuracy: 0.5°; Output current: 0–±10 A/phase, 0–±30 A/3 parallel; Maximum output load voltage: 20 V.

AC voltage output
Output accuracy: 0.2°; Phase voltage (RMS): 0–120 V; Line voltage (RMS): 0–240 V; Phase/line example output power: 80 VA / 100 VA; Frequency range (fundamental): 1–1000 Hz; Harmonic orders: 1–20.

DC voltage output
Output accuracy: 0.2°; Phase voltage range: 0–±160 V; Line voltage range: 0–±320 V; Phase/line example output power: 70 VA / 140 VA.

Switch quantity and time measurement
Switching inputs: 10 channels; Null contact: 1–20 mA; Potential contact access levels: '0' = 0–+6 V; '1' = +11 V–+250 V; Switching outputs: 8 pairs (DC: 220 V/0.2 A; AC: 220 V/0.5 A); Time measurement: 0.1 ms–9999 s, accuracy 0.1 ms.

Mechanical & general
Industrial control type; Overall dimensions: 375×305×140 mm³; Weight: 13 kg; Power supply: AC 220 V ±10%, 50/60 Hz; Ambient temperature: -10 °C to +50 °C.

Technical specifications

• Model: UHV-803
• Brand: UHV
• Architecture: DSP + FPGA, true 16-bit DAC
• Display: 8.4 inch TFT, 800×600
• Operating system: Windows XP (host) and PC control supported
• Main I/O: configurable 4-phase voltage outputs, 3-phase current outputs, multichannel switching I/O, USB connectivity
• Key ranges: AC current phase 0–40 A; 3-phase parallel 0–120 A; AC voltage phase 0–120 V; line 0–240 V
• Accuracies: 0.2° for AC outputs/voltage/current; 0.5° for DC current
• Max powers: phase current 420 VA; 3-parallel 900 VA (10 s)
• Time measurement: 0.1 ms resolution; range 0.1 ms–9999 s
• Auxiliary DC outputs: 110 V / 220 V
• Protections: thermal management, soft-start, diagnostics
• Dimensions & weight: 375×305×140 mm³; 13 kg