10
1.2
Output Voltage Control
1.2.1
The output from the equipment is controlled from zero by means of a regulating
transformer.
1.2.2
The transformer is operated by means of a control knob which is located on the
right hand side of the instrument's front panel.
1.2.3
To increase the output voltage turn the control knob in a clockwise direction.
1.2.4
Note: The output can not be energised unless the regulator knob is set to zero,
thus operating the zero voltage interlock switch.
1.3
Overload Protection
1.3.1
The instrument is fitted with fast acting fuses which protect the incoming mains
supply to the unit. The rating of the fuses is as follows:
a.
F3.15A for 240V operation
b.
F5A for 115V operation
1.3.2
The outputs from the instrument are protected by means of a fast acting magnetic
overload relay which in turn controls an output contactor. The overload is set for
12 - 15 milliamperes.
1.4
High Voltage Output Cable
1.4.1. The high voltage output cable provided with the equipment are 5M long and are
terminated with a suitable connector allowing a good secure connection to the test
object. The cable type used is UR67M with a multi-stranded inner core. The
outer screen is connected via the high voltage plug to the ground connection on the
PT15-10s.
1.4.2. The high voltage plug is protected in transit by a plastic cover. The plastic cover is
attached to output cable by means of thick nylon cord.
1.4.3. The high voltage plugs used on the PT15-10s are fully de-mountable, thus allowing for
re-termination on site should the output cables become damaged.
