AEMC 1000N - Insulation Measurement - Connections

Megohmmeter Model 1000N/1100N
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Figure 7 shows the con-
nections to measure the
insulation of one conductor
to the other conductors.
The cable should be
disconnected at both ends
to avoid leakage through
switchboards and panels.
Figures 8 and 9 show the connection for testing insulation from a supply
conductor to a ground (motor frame). The connection to the guard
terminal is used to eliminate the effects of surface leakage across
exposed insulation at one end of the cable. Refer to the section “Utilizing
the Guard Terminal.” The cable should be disconnected at both ends to
avoid leakage through switchboards and panels.
+ EARTH- LINE
MEGOHMMETER
GUARD
Conductor under test
+ EARTH- LINE
MEGOHMMETER
GUARD
Conductor under test
Figure 7
Figure 8