ABB CPS6000 Product Manual page 112

Shunt Monitors
The QS841A utilizes RS485 serial communication to external distribution monitoring and control
boards for shunt measurements and contactor control. Up to six external boards can be controlled by
the controller. These boards are identified by assigning them an address and an appropriate operation.
Each individual LVD distribution and control board is uniquely addressed by an appropriate ID setting
and assigned to an operation Type. The available Types are: Battery, Load, and None. Shunt sizes for
each assigned battery or load type must also be configured. All shunts are assumed to have a voltage
rating of 50mV. The current rating of each shunt is programmable between 0 to 9999A. Systems that
are ordered with the QS841A such as the NX400 come factory preconfigured. Following are the fields
that need to be programmed.
ID1-6
ID1-6 Rating
Rectifiers
The following features pertaining to rectifiers can be configured:
Redundancy
Rectifier On Threshold
Remote Off
Current Limit
Batteries
This section provides all the configurable items associated with batteries and battery management.
Battery Type
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The operation "Type" of each shunt monitoring circuit on system distribution boards 1-6 must
be assigned based upon actual system implementation. The operational Type may be: None
(For no shunt), Battery (Monitoring battery currents), and Load (for load currents). The factory
default is Battery for ID1 and NONE for the rest.
The current rating of each shunt being monitored by the system distribution boards 1-6 must
be configured based upon actual system implementation. All shunts are assumed to be 50mV.
The current rating may be from 0-9999 Amps. The factory default is 300A for ID1-4 and 600 for
ID5-6.
An alarm is automatically generated when the rectifier capacity On-line in the system falls below
N+1 based on the present system load. The factory default for this feature is Disabled.
The system DC bus threshold that rectifiers placed into Standby will automatically be turned
on. This value can be set between -40 and - 50V. The factory default is -44.0V
Provides the ability to disable or enable the capability of placing a rectifier into Standby
operation through remote means such as the network, modem, or local terminal. The factory
default for this feature is Disabled.
Adjustable from 30-100%.
The type of batteries used in the system and can be set for the following battery types:
SE48S63 (Li-LMP)
•
SE48S80 (Li-LMP)
•
NSB110FT (VRLA)
•
NSB170FT (VRLA)
•
NSB60FT (VRLA)
•
IR30EC (VRLA)
•
IR40EC (VRLA)
•
12A100FT (VRLA)
•
12A150FT (VRLA)
•