Rockwell-automation 6012DB PowerFlex Medium Voltage Variable Frequency Manuel d'utilisateur télécharger pdf (Page 117)

Rockwell Automation Publication 6000-UM001B-EN-P - October 2014 117

Preventative Maintenance and Component Replacement Chapter 5

Connections

Inspect LV Component Terminal and Plug-in Connections

All LV control connections must be secure. Check for dirt, debris, or foreign

material, and clean with anti-static cloth if necessary.

Check relays, contactors, timers, terminal connectors, circuit breakers, ribbon

cables, control wires, etc. Check for corrosion, excessive temperature, or

contamination. Clean all components using a vacuum cleaner.

Inspect Medium Voltage Cable Connections

Verify that all MV power cable connections and grounding cables are torqued to

specification. Apply torque sealer where necessary. Check for corrosion, excessive

temperature, or contamination.

Inspect Power Cable and Control Wire Terminals

Loose connections in power circuits can cause overheating that can lead to

equipment malfunction or failure. Loose connections in control circuits can

cause control malfunctions. Loose bonding or grounding connections can

increase hazards of electrical shock and contribute to electromagnetic

interference (EMI). Check the tightness of all terminals and bus bar connections

and tighten securely any loose connections. Replace any parts or wiring damaged

by overheating, and any broken wires or bonding straps. Refer to the User Manual

for torque values required for power cable and bus hardware connections.

Inspect Transformer Secondary Windings

Check the Incoming Line Power Cable connections (L1, L2, and L3), the

Outgoing Motor Power Cable connections (U, V, W), and the Isolation

Transformer Power Cable Connections are torqued to specifications. See

Figure 9 on page 19

and Figure 10 on page 19.

Inspect LV Component Terminal and Plug-in Connections 117

Inspect Medium Voltage Cable Connections 117

Inspect Power Cable and Control Wire Terminals 117

Inspect Transformer Secondary Windings 117

Inspect Power Module Input and Output Power Connections 118

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Rockwell-automation 6012DB PowerFlex Medium Voltage Variable Frequency Manuel d'utilisateur Page 117