Impulse voltage and current test systems

Impulse test systems are used for impulse testing of high voltage devices such as transformers, cables, gas-insulated switchgears (GIS), arresters, etc. The test systems generate lightning impulse voltage waveform (LI, 1.2/50 µs), chopped lightning impulse voltages waveform (LIC, front, crest or tail chopped), and switching impulse voltage (SI, 250/2500 µs) in accordance with IEC 60060-1; as well as IEC 60076-3 for transformers, and IEC 62067, 60840 und 60502-1 for cables).

Impulse test systems are available in different configurations boardly divided in two types.

1. W series: 100kV, 5/10 KJ per stage with max. rating up to 1600 kV, 160 kJ
2. V series: 200 kV, 20/30 KJ per stage with max. rating of 6000 kV, 900 kJ

The standard test system consists of following components:

Impulse Generator
HVDC Charging Power Supply
Impulse Voltage Divider
Impulse Control, Measuring and Analyzing System

Optional Acessories:

Impulse Current Shunts
Multi-stage Chopping Gap
Overshoot Compensation Device
Glaninger Circuit
Recurrent Impulse Generator
Reference Impulse Calibrator

APPLICATION
Applications cover testing according to IEC, ANSI/IEEE as well as other national & international standards. The Impulse Voltage System can be used to test any high voltage electrical equipment like:

Power & Distribution Transformers
Cables
Surge / Lightning Arresters
Insulators
Instrument Transformers
Bushings
GIS
Switchgears
Shunt Reactors
Special Application Transformers

FEATURES:

Low internal inductance ensures high efficiency.
Easy & quick reconfiguration to meet different testing requirements.
User friendly operation through computer-controlled hardware.
Special resistors, capacitors and inductors can be supplied for other impulse shapes like (8/20 μS, 4/10 μS) as per IEC 60099 and/or other load testing.
Reliable, accurate and fail – safe triggering circuitry.
Load range can be extended using Glaninger Circuit, overshoot compensation, termination resistors and special wave shaping resistors.
The electronic measurement and controlling device include optical isolators to provide safety of the electronics in high voltage environment thus ensuring trouble-free operation.