Disconnecting - Delta C1000 Operation And Installation Manual

1.5 Disconnecting

Isolation of the device must always occur under load-free conditions.
CAUTION! RISK OF LETHAL ELECTRIC SHOCK.
It is admitted to work on the PV Inverter only after switching the relative power
sources.
The VDE regulations must be followed:
• Disconnect
• Ensure that the device cannot be reconnected
• Ensure that no voltage is present
!
• Ground and short-circuit the unit if necessary (not on the DC side)
• If necessary, cover or shield any adjacent live components
The following power sources must be isolated:
• Grid voltage for grid feeding
• Grid voltage for internal power supply (optional)
• DC voltage from the photovoltaic generator
Simply switching off the main AC and DC switches is not sufficient to ensure
proper isolation of the device. The main switches only separate the power
circuit from the grid and the photovoltaic generator.
CAUTION! RISK OF LETHAL ELECTRIC SHOCK.
Dangerous accidental-contact voltages can be present in the PV Inverter even
!
when the main AC and DC switches are switched off!
• Wait at least 6 minutes after switching off the PV Inverter.
The DC voltage is isolated by using internal circuit breaker or external circuit
breaker if present. Isolation by turning internal curcuit breaker off must occur
under load-free conditions.
The device contains capacitors on DC and AC side that must discharge once
the device has been switched off. After switching off, dangerous accidental-contact
voltage remians within the device for several minutes.
If there is a fault in the device, the voltage may also be existed for a longer time.
Please wait at least 6 minutes after switching the device off before opening the
device.
CAUTION! RISK OF LETHAL ELECTRIC SHOCK.
Dangerous accidental-contact voltages can be present in the PV Inverter even
!
when the main AC and DC switches are switched off!
• Wait at least 6 minutes after switching off the PV Inverter.
11
Introduction