T&R KV30-40D mk3, Руководство по эксплуатации и техническому обслуживанию

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1.3 Output Voltage Control
The output is controlled from zero by means of a regulating transformer. The transformer is
operated by means of a control knob which is located on the front panel. To increase the output
voltage the knob is turned in a clockwise direction.
1.4 Overload Protection
The equipment is fitted with fixed and variable overload protection circuits as standard.
1.4.1 Variable Overload
The variable overload protection system senses current changes in the high voltage circuit. The
trip level is adjusted by means of a selector switch on the front panel of the unit. The switch
allows the level to be adjusted from 10-110% of normal full load current in eleven steps.
The circuit will activate when the load current exceeds that set by the trip level selector switch.
The circuit will respond more slowly to slowly changing levels of load current.
IMPORTANT NOTE: The variable overload trip circuit does not limit the output
current on short circuit.