Quick Tester Model 8505
9
2.2.1 Performing a Test
Testing a transformer or capacitor is very simple and straightforward.
●
To test a transformer, connect the alligator clip to one end
terminal of the transformer’s coil and touch the probe to the
other end terminal of the coil. If there is continuity, the green
Transformer (T) PASS light will blink and the buzzer will sound.
If the coil is open, the red OPEN light will blink, and no buzzer
sounds. Note that you can test both single-phase and three-
phase transformers, as explained in detail later in this section.
●
To test a capacitor, connect the alligator clip to one terminal
and touch the probe to the other terminal. If the capacitor is
functional, the green Capacitor (C) PASS light blinks and the
buzzer sounds. If the capacitor is shorted, the red SHORT light
blinks and no buzzer sounds.
2.2.2 Testing a Single-Phase Transformer
In single-phase power transformers, the primary coil(s) are accessible
over the insulators (bushings); the secondary coil(s) are more easily
accessible over the tank. When a coil is checked, the green Transformer
(T) PASS blinks and the buzzer sounds if the coil is functioning. Note that
you should disconnect the fuse on the primary side while checking the
integrity of the secondary coils.
To test a single-phase transformer, connect the Model 8505 probe to the
SELF TEST LEAD and the alligator clip to the other unlabeled lead. Then
proceed as follows:
1.
Attach the alligator clip to one end terminal of the primary and touch
the other end terminal with the probe. In the diagram below, the
terminals of the primary coil are labeled H1 and H2.
X2
X3
X1
H2
H1
If the coil is functioning the green Transformer (T) PASS light blinks
and the buzzer sounds.
