GE Industrial Solutions Galaxy Pulsar Edge User Manual
Page 82
Galaxy Pulsar Edge Power System Controller
Issue 3 October 2011
82
ID8
Type: None
Shunt: 600A
IDs defined as None will have no currents displayed and shunt configuration has no affect.
Note: Depending on the system and controller configuration for that system the values of the total
load current (I
load
) are calculated differently.
The following table describes the different calculations for total load current.
Shunt
Type
System Configuration
Proposed Controller Operation
Battery
Shunt input is connected to a
centralized battery shunt located in the
system. All battery current flows
through this shunt to and from the
system batteries. System may or may
not have Shunt Monitors configured.
Note: the shunt must be mounted in the
grounded side of the system’s DC bus.
Possible damage may occur if the shunt
is connected incorrectly.
Controller shall report the following:
I
Load
= Σ I
Rect
+ I
plantshunt
I
battery
= I
plantshunt
Where I
plantshunt
is negative for current
into the battery and positive for current
out of the battery.
If there are shunt monitor cards also
installed:
1. Cards configured as monitoring a
“Load” shunt shall not affect the
total I
Load
but have their values
individually displayed.
2. Cards configured as monitoring a
“Battery” shunt shall not contribute
to total battery current ( I
battery
) but
have their values individually
displayed.
All battery management functions
remain available.
LOAD
Shunt input is connected to a
centralized load shunt located in the
system. The total system Load current
flows through this shunt to the load
equipment. System may or may not
have Shunt Monitors configured.
Note: the shunt must be mounted in the
grounded side of the system’s DC bus.
Possible damage may occur if the shunt
is connected incorrectly.
Controller shall report the following:
I
Load
= I
plantshunt
I
battery
= Unavailable
If there are shunt monitor cards also
installed:
1. Cards configured as monitoring a
“Load” shunt shall not affect the
total I
Load
but have their value
individually displayed.
2. If there are cards configured as
monitoring a “Battery” shunt it
shall be assumed that all battery
current flows through these shunts
to and from the system batteries.
These values shall be summed to be
equivalent to the total battery
current ( I
battery
) and override the
previous equation for I
battery
. Thus,
the new I
battery
is
I
battery
= Σ I
battery shunt monitors