Vertiv
|
NetSure -48V DC Bulk Output Power System Installation and User Instructions (UM582127100)
|
Rev. E
53
OPERATING PROCEDURES
Controller and Rectifiers
For operation instructions on these units, refer to the following documents.
•
NCU Controller Instructions (UM1M830BNA)
•
Rectifier Instructions (UM1R483500E)
ESTOP Function
If an ESTOP switch is wired to the IB2 Interface Board, customer-furnished system ground applied to terminal
DI8+ activates the ESTOP function. The ESTOP function shuts down and locks out the rectifiers. To restart
the rectifiers after removing the ESTOP signal; turn AC power to the rectifiers OFF, wait 30 seconds or more
(until the LEDs on the rectifier extinguish), then turn AC power to the rectifiers ON.
NCU Battery Charge Current Limit Feature
Functionality: After a commercial AC failure or when some battery cells are permanently damaged, the current
to the batteries can be quite extensive. To avoid overheating or further damages to the battery, the NCU can
be programmed to limit the battery current to a preset level by limiting the charging voltage of the rectifiers.
Should the battery current still exceed a higher preset value, an alarm is issued.
The controller limits the current going to the batteries based on the “Battery Current Limit” set point which is a
percentage of the battery capacity in C10. For example, 0.1C10 would mean 10% of the battery capacity.
In this system, the NCU Battery Charge Current Limit feature is set to be enabled. If enabled, battery charge
current is limited to the value set in the NCU Controller, as long as battery voltage is above 47VDC. Refer to the
NCU Controller Instructions (UM1M830BNA) for more information.
Local Controls and Indicators
Refer to the Controller and Rectifier Instructions for descriptions of the local controls and indicators located on
these units.
