Impulse Current Test Systems
Impulse Current Test Systems
Impulse Current Test Systems
3.40/6 IP S
TEST SYSTEMS
n Impulse current tests on
– Arresters and varistors
– Lightning protection elements
– Vehicles and aircrafts
– Military and plasma applications
IMPULSE CURRENT TEST SYSTEMS
Fig. 1 1 Single-stage Impulse Current Test System with impulse energy 250 kJ, charging voltage Fig. 2 Central part of Impulse Current Test Fig. 3 Multi-stage Impulse Voltage Test System with Fig. 4 Impulse Current Test System with impulse energy 128 kJ, charging voltage
100 kV and max. peak current 150 kA (4/10 µs) with additional equipment for operating duty test System with spark gap, current modification to generate impulse currents 80 kV and max. peak current 100 kA (10/350 µs) with additional crowbar circuit
measuring device and test object
fundamentals
Primary applications of Impulse Current Test Systems are the The following tests (selected one or all) have to be performed at
testing of surge arresters, nowadays mainly of the metal-oxide surge arresters:
type (MOA), and surge protection devices (SPD).
E xponential impulse current tests (Table 1)
The tests to be performed are described in various standards,
Long duration impulse current tests, line discharge test
e.g. IEC 60099-4 and IEC 61643-11. Due to the large range of
E xponential impulse current tests followed by
applications of surge arresters, Impulse Current Test Systems AC voltage (operating duty test)
can have many different realizations.
AC voltage test for determination of reference voltage
at reference current
According to IEC 60099-4, surge arresters are classified by a
new classification based on repetitive charge transfer rating, A strong restriction occurs, if long duration impulse currents
as well as thermal energy rating and thermal charge transfer have to be generated. In this case an in-line or circular arranged
rating, respectively. Requirements depend on the intended ar- generator with at least 8 capacitors is necessary. Depending
rester application, being either a distribution or a station class on the arrester class and designation, the long duration cur-
arrester. The standard IEC 60099-4 recommends, depending rent and wave shape have to be adapted. Typical long duration
on the arrestor class and application purposes, a broad range currents are between 550 and 1500 A, the duration of the peak
of different tests and performance characteristics. varies between 2000 and 3200 µs.
Table 1 Exponential impulse current tests for surge arresters recommended by IEC 60099-4
Designation SH SM SL DH DM DL
Repetitive charge transfer rating [C] ≥ 2.4 ≥ 1.6 ≥ 1.0 ≥ 0.4 ≥ 0.2 ≥ 0.1
Peak current for residual voltage test (1/< 20 µs) [kA] 20 10 10 10 5 2.5
Peak current for operation duty test (4/10 µs) [kA] 100 100 100 100 65 25
Peak current for residual voltage and conditioning test (8/20 µs) [kA] 40 20 20 20 10 5
Peak current for residual voltage test (30…100/60…200 µs) [kA] 2 1 0.5 - - -
For further information please contact: HIGHVOLT Prüftechnik Dresden GmbH Phone +49 351 8425-700
Marie-Curie-Straße 10 Fax +49 351 8425-679
01139 Dresden E-mail sales@highvolt.de
Germany Web www.highvolt.de
© HIGHVOLT Prüftechnik Dresden GmbH – 2016/12 – 3.40/6.pdf – Subject to change without prior notice