M
44
AVTM21-415Ja Rev. A June 2005
Figure 14: Two-winding Transformer in Three-Terminal
Form.
The measurements required are a combination of 2 and 3
terminal forms and measurements of resistance are made in
accordance with Table 2.
TABLE 2: Two and Three Terminal Measurement
Connection Schedule
CONNECTIONS
MEASUREMENT
HIGH
VOLTAGE
GROUND
GUARD
r
12
'
1
2
Not Used
r
12
1
2
3
r
23
3
2
1
r
12´
(r
12
+r
23
)-r
12
r
23
r
13
=
r
12
-r
12´
By using the guard, the resistance between each winding and
ground are measured directly and with the addition of one
extra measurement the resistance between windings is
calculated from the above equation.
Summary of Contents for ATEC 210415 Series
Page 2: ...15 kV Megohmmeter Test Set Catalog No 210415 Series M...
Page 9: ...M 2 AVTM21 415Ja Rev A June 2005 Figure 1 15 kV Megohmmeter Test Set Catalog No 210415...
Page 13: ...M 6 AVTM21 415Ja Rev A June 2005 M...
Page 19: ...M 12 AVTM21 415Ja Rev A June 2005 M...
Page 23: ...M 16 AVTM21 415Ja Rev A June 2005 Figure 2 Schematic Diagram of the 15 kV Megohmmeter...
Page 30: ...SETTING UP 23 AVTM21 415Ja Rev A June 2005 Figure 4 Testing in a Substation...
Page 32: ...SETTING UP 25 AVTM21 415Ja Rev A June 2005 Figure 6 Testing Transformer Terminals...
Page 33: ...M 26 AVTM21 415Ja Rev A June 2005 Figure 7 DC Motor Test Setup Figure 8 Generator Test Setup...
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Page 73: ...M 66 AVTM21 415Ja Rev A June 2005 Figure 15A Interior View Figure 15B Interior View...
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Page 81: ...M 74 AVTM21 415Ja Rev A June 2005 M...
Page 82: ...M 2621 Van Buren Avenue Norristown PA 19403 1 800 723 2861 ext 8578 megger com...
