Figure 115. Excitor and rectifier.
connect all radio suppression capacitors from the circuit
winding. Never perform this test
to be tested. When testing a stator element, connect
without at least one other person
one lead from the test apparatus to the generator frame
assisting. Generator frame shall be
(ground). When testing elements that rotate, connect
the test apparatus ground lead to the shaft.
ambient temperature and relative
Record the winding
Observe Safety Regulations.
temperature if the winding is at other
voltage used in this test are
than ambient temperature.
dangerous to human life. Constant
with the leads on the windings under
(1) Stator Leads Insulation.
test may cause severe, and possible
fatal shock. Arrange the high voltage
are at ambient temperature. Connect
leads so that they are not in a
stator leads (T1, T2 and T3, T4, T5, T6,
position to be accidentally touched.
T7, T8, T9, T10, T11, and T12) together
Keep clear of all energized parts.
and test as a unit. Connect one side of
Always reduce the test voltage to
megger to the multiple connection and the
zero and ground the winding under
test before making any mechanical
Measure the insulation
or electrical adjustments on the
When grounding out
Refer to Table 3 to determine the limits of
insulation. Disconnect neutral ground.
windings which have been tested,
always connect the connecting wire
to ground first, and then to the