Safety instructions 11
Personal protective equipment (PPE)
Obey all local installation safety standards and rules. This can require the use of arc-proof
clothing, arc-proof masks, protective footwear, protective gloves, eye protection and
hearing protection. High-power inverter installations have high fault currents. Use
appropriate arc-proof clothing (for example, in the US, a rating of 40 cal/cm
2
is required).
Safety instructions for the switchgear and transformer
compartment
WARNING! Do the procedures before you start the work on the switchgear or
transformer. Ignoring the instructions can cause physical injury or death, or
damage to the equipment.
1. Identify the switchgear and read its safety instructions.
Make sure that the capacitive voltage indicators operate in all switchgear bays (all of
the phase LEDs are on when the voltage is connected).
2. Disconnect the switchgear from all possible power sources (grid, solar generator and
parallel connected stations), prevent connection, lock and attach warnings.
• Stop the inverters. Open the DC disconnecting switches [-1Q1, -1Q2] from both
inverter units, lock them and attach warnings.
• Set the AC cabinet switch to off, lock it and attach a warning.
• Set the inverter auxiliary power to off.
• Open or disconnect the breakers and switches of the AC cabinet.
• Open the switchgear (V-module) on the transformer side.
• Set the disconnecting switch on the transformer side of the switchgear to the open
position, lock it and attach a warning.
• Disconnect the switchgear terminals from all possible external power sources (grid
and parallel stations). Refer to the user's manual of the switchgear. Prevent
reconnection (remove the switchgear C-module key) and attach warnings.
3. Make sure that all shrouds and screens are in place.
4. Make sure that you will not be near any live parts when you do work. Disconnect the
live circuits or protect them with shrouds or screens.
5. Make sure that the switchgear is not energized.
Read the status of the voltage indicators in all switchgear bays (all phase LEDs which
were on at Step 1 are now off).
6. Earth the switchgear and inverters.
• Turn the earthing switches of the switchgear to the “earthed” position, lock them
(remove the switchgear V-module key) and attach warnings. If the station is
To Next Page
Loading...
