Product Overview
Ultra-high-voltage equipment demands impulse test systems with both high voltage capability and precise waveform control. This 800 kV lightning impulse voltage generator is configured for UHV-class GIS, bushings, and surge arresters. The Marx circuit uses low-inductance capacitors and a resistive-filtered return path to maintain standard 1.2/50 μs waveforms under the high-capacitance loads typical of UHV GIS testing. The charging system provides constant-current control with ≤±1% voltage stability.

Test Functions

• Lightning impulse voltage (1.2/50 μs) up to 800 kV

• Switching impulse (250/2500 μs) with optional wave-shaping module

• Chopped impulse with triggered gap

• Full digital measurement with automated report generation

Use Scenarios

• UHV GIS factory routine and type tests

• UHV transformer insulation verification

• Surge arrester residual voltage testing at elevated voltages

• High-voltage research laboratory acceptance testing

Customer Pain Points Addressed

• Waveform distortion at UHV capacitance levels: The low-inductance design and resistive filtering maintain front time within tolerance even with GIS load capacitance exceeding 10 nF.

• Charging time limits throughput: Constant-current charging with 30–180 s programmable time completes a full charge cycle in under 3 minutes for most UHV loads.

• Safety concerns at 800 kV: The system includes automatic grounding, discharge rod interlock, and door interlocks for the test bay.

FAQ
Q: What is the required floor space?
A: The generator body and divider require approximately 6 m × 4 m of clear floor area, plus a control room or shielded control console location.

Q: Can this system be used for switching impulse tests?
A: Yes, with the optional switching impulse module. The same capacitor bank is reconfigured via the wave-shaping resistors.

Q: What is the typical delivery lead time?
A: Standard configurations ship within 12–16 weeks from order confirmation, including factory acceptance testing.