EuroWire January 2015

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January 2015 30
high voltage testing with DC spark
testers of the DST 28A series and the
AST H 15A high frequency spark testers
extend the spark tester product range
from Zumbach.
These new testers meet all the
requirements to ensure quality standards
are maintained during the extruding or
rewinding process.
The spark testers instantly and reliably
detect defects and faults on the
sheathing and insulation of electrical
cables, tubes, corrugated tubing, hoses
and similar products.
These devices make sure that defective
products with bare patches, hairline
cracks or pinholes have no chance of
slipping into circulation.
As soon as a fault is detected, the system
triggers an alarm and every fault is
logged.
Once the fault is outside the electrode,
the spark tester continues operations
after a brief loading time and resets the
test voltage to the default value.
On rewinding devices, the faults are
consecutively counted. The test voltage is
disconnected on fault detection. An alarm
message is sent via the interface, or the
potential free alarm contact is activated.
Benefits at a glance include:
• Suited for highest capacitive loading
capabilities
• Continuous and faultless detection of
defects in insulation or sheathing of
electric cables
• Detection of defects in the wall
thickness of pipes, hoses, corrugated
pipes and similar products made of
insulating materials
• Regulated, adjustable output voltage
up to 28kV DC (DST 28A)/ 15kV AC
(AST H 15A)
• Full range of electrodes
• Detection of pinholes and bare
patches on cables and tubes with
diameters of up to 70mm (DST 28A);
up to 30mm with AST H 15A
• Compact design
• Designed for a wide range of
standards, incl IEC 62230, UL 1581
and UL 2556
The full spark tester product range from
Zumbach covers test voltages of up to
40kV for products with diameters of up
to 200mm.
Zumbach Electronic AG – Switzerland
Website :
New generation of spark testers
▲ ▲ One of the new range from Zumbach