ABB ACS1000i air-cooled, User Manual

Page: 23 / 174

02 IMPORTANT SAFETY INFORMATION
3BHS206977 E01 REV H ACS1000I AIR-COOLED USER MANUAL 23/174
4
Verify the absence of operating voltage: always test
before you touch!
Only use properly rated and inspected voltage detection devices and wear
proper PPE identified in step 1:
- Test voltage detection device
- Test for voltage
- Test voltage detection device
It is highly important that the voltage detection device is tested on a known
voltage source such as a Proving Unit or by performing an internal self-test,
according to the manufacturer’s instructions, before and after testing for
the absence of operating voltage.
5
Carry out earthing and short-circuiting.
- Close and lock the earthing switch if the electrical equipment is
designed for this purpose or apply portable equipment for earthing and
short-circuiting.
If this is carried out by the customer, then the PICW must ensure that
this equipment is properly earthed as a part of the integration/
verification and during step 7 when the PICW walks the PTW.
6
Protect against adjacent live parts and take special
precautions when close to bare conductors.
- Determine minimum approach distances, apply screening or shrouding,
and when applicable, padlock both cable and busbar shutters.
- If working within the restricted approach boundary or vicinity zone
where inadvertent movement could cause contact with live parts,
special precautions must be employed, such as the use of the properly
rated insulated gloves and tools.
7
Complete the permit to work and “Walk the Permit”.
- Check isolation points
- Verify that all circuits are isolated and secured
- Ensure all parties are integrated with the Lockout/Tagout
- Check the earths are properly applied
- Answer specific questions from the working group
- Ensure the work can proceed without danger
- Complete and verify the “Permit to Work”
For an example “Permit to Work”, see “Permission for working and permit
to work for test work at test stations” (3BHS817511 E30)