Ensure System Is De-Energized; Ground The G5 Stack Switchgear - Nuvation Energy NUVG5 Product Manual

4.3.3.2. Ensure system is de-energized


Ensure that the Service Disconnect switch is in the Lock Out position.
Service Disconnect
The manual Service Disconnect switch is accessible on the front of the G5 Stack Switchgear. Use
the lock-out/tag-out to ensure that the battery stack does not connect to the DC bus or power
conversion system during installation.
Ensure the service disconnect switch is in the Lock Out position and lock-out/tag-out the switch
by locking the cover.
The service disconnect switch removes power to the internal contactors—it does not
physically break the connection (this is done by the contactors themselves).

In the event of damage to the internal contactors (i.e. a welded contactor), the
service disconnect switch cannot guarantee that the DC bus has been disconnected
from the battery. It is therefore recommended to check for voltage present on the
Battery Stack and DC Bus terminals with a voltmeter before working on the stack to
ensure the contactors have opened fully.
Verify G5 Stack Switchgear is de-energized
Using a multimeter check the Battery Stack and the DC Bus terminals respectively to verify that
the G5 Stack Switchgear is de-energized.

4.3.3.3. Ground the G5 Stack Switchgear

Document ID: NE-DS-011
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual
Figure 14. Service Disconnect
Figure 15. Grounding bolt
26 Rev 1.0, 2023-05-19
G5 Faraday