AEMC 1015 User Manual page 15

Figure 6 shows the connections to
a transformer (lighting or distribu-
tion).
Make sure that the switches and/
or circuit breakers on both sides
are open.
Check the high voltage winding to
ground, low voltage to ground, and
the resistance between them with
no winding grounded.
~
~
~ ~
-
+
!
Battery
OFF
Check
MΩ - 1000 V
MEGOHMMETER
AEMC
MODEL 1015
I N S T R U M E N T S
Figure 7
Megohmmeter Model 1015
Jumpers
~
~
600V
6
MΩ - 500 V
1000 Ω
10 Ω +
10 Ω −
Transformer
Grounding Lug
-
+
600V
!
6
Battery MΩ - 500 V
OFF
Check
MΩ - 1000 V
1000 Ω
10 Ω +
10 Ω −
MEGOHMMETER
AEMC
MODEL 1015
I N S T R U M E N T S
Figure 7 shows the connections for
measuring the insulation of a three-
phase line to ground by connecting
the jumpers between phases.
This gives a reading of all conductors
at once. If a load such as a motor,
heater, etc., is attached to the other
end of the line, it will read the load
resistance to ground at the same
time.
By removing the jumpers, readings
can be made between the individual
conductors and ground.
Tested Winding
Figure 6
13