Hawke’s Bay
Manual
15| P a g e 1 0 - 4 2 5 - 1 R E V : - F W : X X X
Activating Arc Fault:
1.
Go to MPPT Config, then to External Sensors.
2.
Go to AF, then ENABLE.
Ground Fault
Since 2008 the NEC requires a DC Ground Fault (GF)
Protection device on all PV systems to indicate when a GF
condition exists. For GF monitoring, you can either install the optional GF sensor (toroid) in the
Hawke’s Bay
or install an external GF breaker into your PV system.
The
Hawke’s Bay
GF toroid works with either grounded or
ungrounded PV systems
. When a GF condition occurs, the Hawke’s
Bay stops charging and announces a GF alert.
Connecting the GF toroid to the Options Board:
1.
GF toroid shown in
Figure 10
.
2.
Connect GF toroid to Options Board.
3.
Pass
PV+
AND
PV-
cables through GF toroid,
Figure 11
.
Activating Ground Fault:
1.
Go to MPPT Config, then to External
Sensors
2.
Go to GF, then ENABLE.
Rapid Shutdown System
The NEC requires a Rapid Shutdown System (RSS) to be installed to reduce shock hazards to
firefighters whenever PV system conductors are on or in a building other than a building whose
sole purpose is to house PV system equipment. When initiated RSS lowers PV string- or
module-level voltages to a prescribed voltage level in a prescribed timeframe. Basic RSS
components include PV string or module receivers and a transmitter.
Connecting the RSS sub-board to the Options Board:
1.
The RSS sub-board (green) connects to lower half of Options Board,
Figure 12
.
Figure 10
Figure 9
Figure 11
Ensure tab on toroid jack
mates with the lock on
Option Board receptacle.
