Safety
Why is the earth ground important?
The PE is important for the safety of the person operating the equipment and safe operation of the devices. All grounds should have the same reference potential level between all the components in the system. This also increases performance by reducing the noise level in the system.
How would you check that the system components are correctly connected to the PE?
Check voltage ground connectivity with a digital voltmeter, after ensuring that all the connections are secure and well established with proper wiring according to the product’s schematics.
Are you allowed to connect or disconnect the drive while the power source is on?
No
How much time should you wait after shutting off the drive's power before touching or disconnecting parts of the system?
Minimum: 1 minute
Recommended: several minutes
The internal capacitance is discharged during this time.
What are the two main safety standards that Elmo drives comply with?
CE and UL
two types of failures are known to you? What are the risks of each one?
Improper grounding: Can result in excessive voltage drop, drive failure or personal injury.
Improper power supplied: Shorting terminals or improper isolation. Grounding the reference neutral ? of an AC input could result in drive failure and injury.
What steps are taken to minimize the chances of motor-drive failure?
Proper grounding, cable shielding, proper connections.
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