T&R PT30-10 mk2, Руководство по эксплуатации и техническому обслуживанию, Страница: 17 / 28

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2.2 Connection and Testing
2.2.1 Connection Sequence
WARNING - Ensure that all necessary safety procedures are followed at all times!
a. Connect earth lead between test object earth and PT30-10 earth terminal.
b. Connect discharge/earthing probe to the PT30-10 earth terminal. The earth hook on the probe
must now be placed on the test object HV connection point.
c. Connect the phases not being tested to earth. This means 1 phase for bipolar test and 2 phases
for a unipolar test.
d. For a unipolar test connect the black/negative HV lead to the negative output socket on the PT30-
10 and the test object. The positive output must be blanked off using the plastic blanking plug
provided (not the metal dust cap). It is also possible to carry out a positive unipolar test, as
shown in figure 3, although it is more common to use a negative test as this is more onerous.
e. For a bipolar test connect both the red/positive and black/negative HV leads to the output sockets
on the PT30-10 and the test object as shown in figure 4.
f. Connect the PT30-10 to mains supply.
h. Check that all connections are secure and that all safety procedures have been followed.
Re-check that all personnel are out of the test area.
6
8
10
4
2
0
8
10
2
4 6
0
Cable under test
Connect to low
impedance
local earth
DP40 Discharge
Probe
Mains
supply
Blanking plug
Figure 2 Connections for positive unipolar test