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also provide a conservative functional clearance to earth for high voltage components in
the test area.
Particular attention should be paid to clearances between any parts of the test object at
test voltage potential and the test enclosure or barriers. Refer to EN50191:2001 and
local safety standards for details of the safety clearances required.
Unit type
Maximum voltage
Prohibition zone
/functional clearance
KV30-100
30kVac
170mm
KV50-100,
KV50-200
50kVac
280mm
KV100-100
100kVac
560mm
Safety clearances from prohibition zones to barriers are shown below. These are simplified
clearances based on a 1.2m high barrier (different arrangements allow this value to be
reduced). Always check the latest version of EN50191 for clearances applicable to your test
area and test.
Unit type
Maximum voltage
Horizontal clearance from
prohibition zone to barrier
KV30-100
30kVac
1.4m
KV50-100, KV50-200
50kVac
1.4m
KV100-100
100kVac
1.4m
Summary of Contents for KV mk2 Series
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