Disassembly
Replacing the Current
Transformer
Replace the cur
rent transformer of the probe as follows:
1. Gently lift the front edge of the circuit board and transformer enough to clear
the probe body
as shown.
2. Pull the transformer socket straight off the circuit board pins.
Figure 32: Removing the current transformer
3. Before reassembling the probe, be sure that the gap between the stationary
and moveable core pieces is clean. If necessary, use isopropyl alcohol o r a
similar cleaning agent to clean the pieces. Also, clean the contacts of the
slide switch, if necessary. If the plastic slide assembly requires lubrication,
spari
ngly apply s ilicone-based grease to the parts.
4. Probe reassembly is the reverse of steps 1 through 2 of this procedure and
step
s1through5.(Seepage73,TCP305 and TCP312.)
NOTE. Exercise care when fitting the slide back into the probe body; aligning the
switch contacts can require patience.
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Service Manual 75
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