Mvcs Working Area Safety; Personal Protective Equipment (Ppe); Safety Instructions For Mv Switchgear And Mv Transformer Area - ABB PVS-100 Series Hardware Manual

6. Take special precautions when you work close to exposed conductors.
7. Measure to ensure that there is no voltage connected.
8. Carry out earthing (grounding) and short circuiting.
9. Issue a permit to work.
￭

MVCS working area safety

The MVCS has three working areas:
• AC Cabinet Area
• MV Transformer Area
• MV Switchgear Area
Each work area has separate safety instructions.

Personal protective equipment (PPE)

• Perform any operation on the equipment with suitable work clothes and instruments.
• When choosing a personnel protective equipment, consider environmental conditions
such as humidity, noise, etc. and local regulations.
• Make sure the work clothes and accessories are not prone to generate electrostatic
charges, fires or any other condition that compromises personnel safety.
• The minimum required safety equipment is as follows:
• Safety shoes
• Safety gloves
• Safety glasses
• Head protection
• Hearing protection
• Work clothes

Safety instructions for MV switchgear and MV transformer area

WARNING!
Perform the below instructions before you start working inside the MV switchgear
and/or MV transformer area. Ignoring the instructions can cause physical injury or
death, or damage to the equipment.
1. Identify the MV switchgear and read its safety instructions.
2. Check the operation of the capacitive voltage indicators in all MV switchgear bays (all
phase LEDs are switched on when a voltage is connected).
3. Disconnect the MV switchgear from all possible power supplies (external, auxiliary, and
inverters as well as any parallel connection stations), and secure by locking and tagging.
a. Stop the string inverters outside the MVCS. Open the DC disconnecting switches
in each inverter unit and add warning notices. If applicable, open the AC
disconnecting switches in each inverter unit, lock and add warning notices.
b. Open all fuse base switches of the inverter inputs, lock and add warning notices.
c. Open all auxiliary breakers, switches and fuses in the auxiliary service board, lock
and add warning notices.
d. Turn the vacuum circuit breaker of the MV switchgear to open position. Lock and
add warning notice.
Safety instructions 11