10
1.5
Fault Burn Facility
The KV5-100 mk3 is provided with an internal current limit circuit which limits the output
current from the unit under short circuit conditions. This can be
used to “burn” faults.
1.5.1
Fault Burning
Fault burn is where the arc is maintained through the failed test object. The product does this
by limiting the current and preventing the unit from tripping. Fault burning should be
approached very cautiously as it can cause serious damage to the test object, and is totally
unsuitable for many test objects.
1.5.2
Burn Switch
When the “burn” switch is in the “out” position, the unit behaves normally and the output
current is not limited. Switching the “burn” switch to “in” enables the current limiting
The current is limited to the following values at maximum output voltage when the “burn” is
enabled (the burn switch i
s in the “in” position):
Output Voltage
Maximum current
KV5-100 mk3
5kV
90-100mA
At lower output voltages, the burn current limit reduces in proportion to the output voltage.
When the “burn” switch is in the “out” position, the maximum current is approximately 2A for
short periods of time.
1.6
High Voltage Connection
WARNING
The equipment is supplied with crocodile clips on the output. These clips are
not insulated for high voltage use, and under no conditions must the high
voltage connection be approached or touched whilst the unit is switched on.
The test object must be earthed before making or breaking connections after
testing. A prohibition zone of at least 30mm must be maintained around the
high voltage connection (from EN50191:2000)
This equipment must be used either with an interlocked enclosure for the
object under test or in a suitable high voltage test area. Adequate safety
clearances must be maintained between the operator and all high voltage
parts at all times.
1.7
Construction
The unit is housed in a robust case with a carrying handle. The handle will also act as a tilt
support stand which is locked in various positions by pressing the release buttons at each end
of the handle.
Summary of Contents for KV5-100 mk3
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