•
The service disconnect switch’s lock-out / tag-out should be used.
2. Using a multimeter, verify that the system is de-energized.
•
The battery itself cannot be de-energized.
•
In some situations, it may not be possible to de-energize the DC bus.
3. Install the ground.
4. Install the input power and fan power.
•
Input power and fan power should be de-energized during installation; this usually involves
turning off a breaker at a panel.
5. If the Cell Interface modules are not already connected to the battery (e.g. battery cell
connection, temperature sensors, and Link Bus cables between the Cell Interface modules), this
can be done now.
•
For instructions on connecting the Cell Interface modules to the battery, refer to
.
6. Install the Link Bus cable between the Stack Switchgear and the first Cell Interface in the Link Bus
chain.
7. Install the connection to the battery and the DC bus.
•
This step is done with live voltage; for this reason it is left for last.
•
In order to reduce the risk of a catastrophic short, only install one connection at a time.
The battery stack terminals are always energized and should be handled as such.
Although the DC bus terminals are disconnected from the battery by the Stack
Switchgear unit’s contactors, the DC bus can still be energized by other components
on the DC bus (e.g. power conversion system or other stacks). The DC bus terminals
should always be treated as though they were energized.
A simple voltage check (i.e. across the positive and negative terminals) is not always
sufficient,
especially
with grounded battery stacks.
Nuvation Energy Stack Switchgear - Product Manual
Document ID: NE-PM-003
31
Rev 1.0, 2020-09-03
