TM 10-3510-226-23
0025 00
TEST-CONTINUED
Test the Surge Arrestor
WARNING
This equipment operates at high voltages. Use extreme caution, observe all warnings,
and follow all safety procedures. Failure to observe safety precautions may result in
injury or death to personnel.
NOTE
If the surge arrestor is inoperative, there will be no power to the PLC.
1. Ensure circuit breaker No. 8 is switched ON.
2. Open PLC enclosure.
3. Ensure the indicator LED (Figure 16, Item 7) is lit.
4. Use a voltmeter to test for 120 VAC between L1 (Figure 16, Item 23) and L2 (Figure 16, Item 24) on
the LOAD side of the surge arrestor (Figure 16, Item 25).
5. Use a voltmeter to test for 120 VAC between L1 (Figure 16, Item 23) and G (Figure 16, Item 26) on
the LOAD side of the surge arrestor (Figure 16, Item 25).
6. Use a voltmeter to test for 120 VAC between L1 (Figure 16, Item 27) and L2 (Figure 16, Item 28) on
the LINE side of the surge arrestor (Figure 16, Item 4).
7. Use a voltmeter to test for 120 VAC between L1 (Figure 16, Item 27) and G (Figure 16, Item 30) on
the LINE side of the surge arrestor (Figure 16, Item 29).
8. Replace a surge arrestor (Figure 16, Item 22) which has the correct input voltage and incorrect
output voltage.
9. Close PLC enclosure and monitor for normal operation.
0025 00-17
