Operating Procedures; Controller And Rectifiers; Estop Function; Controller Battery Charge Current Limit Feature - Vertiv NetSure 7100 User Manual

3 Operating Procedures

3.1 Controller and Rectifiers

For operation instructions on these units, refer to the following documents.
•
NCU Controller Instructions (UM1M830BNA)
NOTE!
The controller's default "User Name" is "admin" and the default "Password" is "640275".
•
Rectifier Instructions (UM1R483500e3)

3.2 ESTOP Function

If an ESTOP switch is wired to the IB2, customer-furnished system ground applied to terminal DI8+ activates the ESTOP function.
The ESTOP function shuts down and locks out the rectifiers and opens the low voltage battery disconnect contactor (if furnished). If
the system has battery connected and does not contain a low voltage battery disconnect contactor or the controller power option is
set to Battery Pwr (jumper J4 on the system interface board is set to Battery Pwr), the controller will remain operational. If the system
has battery connected and does not contain a low voltage battery disconnect contactor, the loads will be sustained by the battery
voltage.
When the ESTOP signal is removed, the low voltage battery disconnect contactor (if furnished) remains open. Rectifiers remain off.
The rectifiers restart when input power is removed and restored after 30 seconds or more (until the LEDs on the modules extinguish).
When the rectifiers restart, the low voltage battery disconnect contactor closes (if furnished).
NOTE!
If a customer-furnished method to disconnect the input power to the system is not provided, the rectifiers will stay
locked OFF until the input power is recycled. If the ESTOP signal is removed without recycling the input power, the rectifiers
will remain off and have a local alarm visible on the module. The ESTOP alarm from the controller will extinguish. The
controller will not issue an alarm for this condition.

3.3 Controller Battery Charge Current Limit Feature

Functionality: After a failure of the input source (commercial AC) 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 controller 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. If the C10 capacity of a battery is 100 amp-hr,
the battery recharge current limiting set point is 0.1C10; therefore, the recharge current is limited to 10 A.
Refer to the NCU Controller Instructions (UM1M830BNA) to program this feature. Battery charge current is limited to the value set in
the controller, as long as battery voltage is above 47 VDC. The default value for battery recharge current limit is 0.1xC10.

3.4 Local Controls and Indicators

3.4.1 Controller and Rectifiers
Refer to the controller and rectifier instructions for descriptions of the local controls and indicators located on these units.
Vertiv™ NetSure™ 7100 -48 VDC Power System User Manual
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