Method Of Operation; Connections; Operation; Timer Operation (Kv5-100T Mk2 Only) - T&R KV3-250 mk2 Operating And Maintenance Manual

2.3

Method of Operation

2.3.1

Connections

WARNING
Ensure that the key switch is in the off position and the key is removed before making
connections to the object under test or connecting the unit to the mains supply.
Connect the mains input lead to a suitable three pin supply outlet.
2.3.2

Operation

Switch on the key-operated mains switch. The following will now occur:
a. Power ON lamp will be lit
b. HV OFF lamp will be lit
c. The variable overload reset lamp will be lit
Press the variable overload reset push button. This will arm the trip circuit.
Select the desired voltage range on the kV meter and set the desired overload trip level.
Before commencing testing ensure that all external interlocks are closed, the emergency stop
button is released and that the regulator is in the fully anti-clockwise position.
Press the HV ON pushbutton. The HV output will now energise, and the red HV on indicator in
the pushbutton will light up. The output voltage can now be increased to the desired level as
indicated on the kV meter.
In the event of a test object failure the HV output will be automatically switched off by the
protection system.
When the test is completed, turn the regulator control knob fully anti- clockwise and switch off
the HV output and then the mains supply.
In case of emergency, the emergency stop push button is provided, switching off the HV
output when engaged.
2.3.3

Timer Operation (KV5-100T mk2 only)

The timer is started when the output is switched on. The indicator in the timer cancel button
flashes for the duration of the time selected indicating that the timer is in operation. An alarm
sounds to indicate the timer reaches the selected time duration. The audible alarm is
cancelled using the 'Timer cancel' push button.
WARNING
Before making any connections please ensure that you are aware of all
hazards relating to the system and environment in which it is operating.
Ensure that the key switch is in the off position and the key is removed
before making any connections. The test object must be earthed before
making or breaking any connections after testing.
The timer does not switch the high voltage output off – it only warns the
operator when the required time has elapsed. At the end of the test time, the
output control should be run down to zero before switching the output off.
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