Operation
266/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
27 Cable testing
Preconditions • Circuit-breaker in OPEN position.
• Three-position switch in OPEN position.
• Voltage transformer disconnector in EARTHED position (see page 212, "Operating the feeder
voltage transformer").
DANGER
High voltage and explosion hazard
Will cause serious injury and damage the voltage transformer. If the voltage transformer
disconnector is closed, the test voltage can destroy the voltage transformer.
➭ Switch the voltage transformer disconnector to EARTHED position before testing the
cables, and secure it.
WARNING
Cable testing involves hazardous voltages.
Can cause death, serious injury and property damage.
Incorrect cable testing can damage the switchgear.
➭ During the cable test, keep a safety distance (min. 3 m) from the switchgear.
➭ Install barriers.
➭ Switch on warnings.
➭ When the cable test is completed, earth the test cables.
NOTICE
Voltage indicators may be damaged by test voltage during cable tests.
May cause property damage.
➭ Short-circuit the voltage indicators with short-circuit plugs at the earthing points of the test
sockets.
Short-circuit plug, make Kries, order number 2500029 Short-circuit plug, make Horstmann, order number 51-
9904-001
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