Siemens Water Heater SINVERT 350 Benutzerhandbuch
Hardware operation
3.1 Commissioning the inverter
3.1 Commissioning the inverter
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3.1.2 Switching off and disconnecting the power supply
The entire system must be disconnected from the power supply before test and maintenance work can
be carried out in the containers. Carry out these tasks in the sequence given below:
The entire system must be disconnected from the power supply before test and maintenance work can
be carried out in the containers. Carry out these tasks in the sequence given below:
1.
Press the OFF key briefly on the control panel of every inverter.
2.
For reasons of safety, also press the Fast Stop button (if one is installed) in the inverter room.
3.
Disconnect the external power supply (most commonly in the AC distribution cabinet) by opening
the fuse switch disconnector or by switching off the miniature circuit breaker.
the fuse switch disconnector or by switching off the miniature circuit breaker.
4.
Open the AC-side and DC-side fuse switch disconnectors in all inverters and remove the fuses,
including the fuse holder, or remove the fuse cartridge with a fuse tong. This means that the
inverter cannot be switched on again (remember the five safety rules).
including the fuse holder, or remove the fuse cartridge with a fuse tong. This means that the
inverter cannot be switched on again (remember the five safety rules).
DANGER
The AC and DC connections are still live externally!
5.
In order to disconnect the AC end completely from the power supply, the relevant medium-voltage
transformer must be switched off at the medium-voltage switchgear. After switching off, open the
medium-voltage isolator and close the medium-voltage grounding switch. The machine switching
operations on the medium-voltage components must be performed via the power supply company
or an authorized person.
transformer must be switched off at the medium-voltage switchgear. After switching off, open the
medium-voltage isolator and close the medium-voltage grounding switch. The machine switching
operations on the medium-voltage components must be performed via the power supply company
or an authorized person.
6.
In order to disconnect the DC end completely from the power supply, all relevant junction boxes of
the generator and coupling boxes (if installed) must be disconnected. The disconnectors in the
generator junction boxes and/or coupling boxes (if installed) can be switched under load. In
contrast, fuse switch disconnectors must not be switched under load. Likewise, fuse cartridges in
fuse holders must not be removed under load.
the generator and coupling boxes (if installed) must be disconnected. The disconnectors in the
generator junction boxes and/or coupling boxes (if installed) can be switched under load. In
contrast, fuse switch disconnectors must not be switched under load. Likewise, fuse cartridges in
fuse holders must not be removed under load.
DANGER
Fuse switch disconnectors in the inverters and junction boxes must not be switched under load! Do not remove
fuse cartridges when they are under load!