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S&C Instruction Sheet 659-520
Arrival
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Discuss maintenance plan with site facilitator (if applicable).
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Record the following information:
Site Name: ___________________________
Serial Number: _______________
Control Mode (SCADA - Enabled or Disabled): ____________________
Current System State (from LCD): ____________________
Safety Checks
DANGER
Use lockout-tagout procedures before working on the PCS . Conduct the following checks
to avoid damaging the equipment, personal injury, or even death .
□
Open the PCS enclosure door and press the INVERTER STOP button located on the
user interface panel.
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Verify the ac circuit breaker CB1 is open.
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Verify the dc circuit breaker CB2 is open.
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Use a meter with insulated leads that will not short to the dead front for the follow-
ing steps:
• Verify there is line-to-line ac voltage from the bottom of F4 (ac fuse) to the bottom
of F5 (ac fuse).
• Verify there is line-to-line ac voltage from the bottom of F5 to the bottom of F6
(ac fuse).
• Verify there is line-to-line ac voltage from the bottom of F6 to the bottom of F4.
• Verify there is dc voltage from the bottom of F1 (dc fuse) to the bottom of F2
(dc fuse).
□
Disconnect the ac power that supplies the PureWave SMS-250 system.
□
Lock open the ac power that supplies the PureWave SMS-250 system.
□
Tag open the ac power that supplies the PureWave SMS-250 system.
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Disconnect the dc power that supplies the PureWave SMS-250 system.
□
Lock open the dc power that supplies the PureWave SMS-250 system.
□
Tag open the dc power that supplies the PureWave SMS-250 system.
Maintenance