Section 2
MEASURING ELECTRICITY
engine speed governor. For models rated 60 Hertz, the governor is generally set to maintain a
Measuring Current
To read the current flow, in AMPERES, a
Current flowing through a conductor may be mea- sured safely and easily. A
Figure |
Figure 2-3. – A Line-Splitter
NOTE: If the physical size of the conductor or ammeter capacity does not permit all lines to be measured simultaneously, measure current flow in each individual line. Then, add the individual readings.
Alternatively, to read the current flow in AMPERES, an
This usually requires the positive meter test lead to be connected to the correct amperes plug, and the meter to be set to the amperes position. Once the meter is properly set up to measure amperes the circuit being measured must be physically broken. The meter will be
In Figure
1.00 A
BATTERY |
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- | + | RELAY |
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Figure 2-4. – A VOM as an In-line meter
Measuring Resistance
The
When testing Stator windings, keep in mind that the resistance of these windings is very low. Some meters are not capable of reading such a low resistance and will simply read CONTINUITY.
If proper procedures are used, the following condi- tions can be detected using a VOM:
•A
•Shorting together of any two parallel Stator wind- ings.
•Shorting together of any two isolated Stator wind- ings.
•An open condition in any Stator or Rotor winding.
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