Product Overview
Chopped lightning impulse testing is essential for detecting turn-to-turn insulation weaknesses that full-wave tests can miss. This impulse voltage generator includes a precision chopping gap with adjustable time-to-chop from 2 to 6 μs, enabling standard chopped wave testing per IEC 60076-3. The main Marx circuit uses low-inductance capacitors and resistive filtering to preserve waveform fidelity before and after the chop.

Test Functions

• Full-wave lightning impulse (1.2/50 μs)

• Chopped wave impulse with adjustable chopping time

• Front-of-wave impulse (optional steep-front adapter)

• Simultaneous voltage and current waveform recording

Use Scenarios

• Power transformer routine and type tests

• Insulation design verification for new transformer models

• Failure analysis after suspected lightning damage

• Research on insulation aging under impulse stress

Customer Pain Points Addressed

• Chopping time is inconsistent: The triggered chopping gap fires within ±0.2 μs of setpoint, ensuring repeatable chopped waveforms across test series.

• Oscillations obscure fault signatures: The low-inductance return circuit minimizes stray oscillation, making turn-to-turn fault signatures easier to identify in the recorded waveform.

• Test report preparation is time-consuming: The integrated software automatically marks chop time, peak voltage, and waveform parameters on exported reports.

FAQ
Q: Can the chopping time be adjusted during a test series?
A: Yes, via the control software. The gap spacing is motorized and set from the operator interface without opening the tank.

Q: Is a separate chopping gap required?
A: No. The chopping gap is integrated into the generator head with a triggered firing circuit synchronized to the impulse front.

Q: What is the minimum load capacitance for stable chopping?
A: Stable chopped waveforms are achieved with load capacitance ≥500 pF. For lower capacitance loads, a supplementary load capacitor is recommended.

Sansion Power Electric Co., Ltd was established in 2005, a technocrat who have rich experience of more than 10 years in R&D, manufacturing and marketing of power electrical testing products, which are widely used in the fields of power electric, railroad, energy conservation and environment protection, water conservancy, petrochemical industry, aerospace and etc.

Main products:

HV Hipot Test Set System

Transformer Test Equipment

HV Switchgear Test Set

Relay Protection Tester

CT/PT Tester

SF6/Oil Tester

Transmission Line Test System

Insulation Resistance Tester

Earth Resistance Tester

Sansion Power Electric contains R&D department, instruments manufacturing workshop, HV workshop, sample exhibition room, HV testing laboratory, quality control department, general office, sales departments, information office and etc, now we have more than 60 employees including 20 technical engineers. We have obtained the ISO9001 quality system certification and all products strictly conform to the international IEC or Chinese state standards.

Sansion Power has three subsidiaries companies:

Sansion Power Electric Co., Ltd. (R&D, manufacturing, marketing)

Sansion Power Electric Engineering Co., Ltd. (Electrical installation, laboratory construction, on-site service)

Sansion Power Electric Equipment Rental Co., Ltd. (Power electrical testing products rental and service)

From the date of order placing, we usually need 3-7 working days to manufacturing. Located in Wuhan City, the provincial capital of China, Sansion Power is easy to ship the package by the air or ocean. Sansion Power also can provide OEM service according your customized. We are sincerely looking forward to cooperate with you from all the countries of the whole world.

Sansion History

Nov. 2013 Sansion Power Electric Engineering Co., Ltd. And Sansion Power Electric Equipment Rental Co., Ltd. Established.

Oct. 2012 800kVA/800kV SXBP Series Variable Frequency AC Resonance Test System exported to National Power Company of Yemen.

Mar. 2012 Launch of Intelligent Wireless HV Hipot Test Set, realized the first paperless testing in the domestic power electric field.

DEC. 2011 Launch of SXI-16 Composite Insulator Faults Detector.

Oct. 2011 Certificate ISO9000-2008.

Oct. 2010 Launch of SXI-18 Intelligent Insulator Faults Detector.

Aug. 2009 Full set of test equipment for 35KV substation exported to Kenya.

Apr. 2008 Sales and technical support offices are maintained across several provinces in China, realize domestic sales & after sales service network.

Mar. 2007 Special R&D department founded, and launch of 300kVA SXBP Series Variable Frequency AC Resonance Test System.

Oct. 2006 First sale to foreign country: High-voltage test equipments exported to Russia.

Feb. 2006 Certificate ISO9000-2001.

DEC. 2005 Launch of 500kV Insulator Faults Detector.

May. 2005 Sansion Power Electric Co. Ltd. Established.