11
2.0 INSTALLATION
©2000 Xantrex/Trace Engineering
Figure 8
ST1500 and ST2500 Electrical Component Location
Wiring:
DC Wiring
The combiner board (included on some models) in the ST accepts up to six individual PV array
circuits (positive and negative wires). Each circuit on the combiner board contains a fuse to protect
against over-current. Always replace this fuse with one of the same type and rating (GBB, 20 amp
maximum, ceramic type, 0.25" x 1.25").
The combiner board PV array input connection block is located in the lower section of the ST
unit.
ST1500 and ST2500 DC Wiring
(Refer to Figures 8 and 9)
PV Array Conduit/Wire Run
1.
Install the DC conduit from the PV arrays to the bottom of the ST unit, via one of the knockout
holes (Figures 7A and 7B).
2.
Route the wires from the PV array(s) through conduit and into the lower section of the ST
enclosure (Figure 9).
NOTE: If more than one PV array is used, label the wire pairs (positive and negative) appropriately
(i.e., PV 1, PV 2, etc.).
3.
Connect the positive (+) wire from the #1 array to the terminal strip labeled PV INPUT 1
POSITIVE terminal. Check that the wire is in the proper location and tighten the screw.
4.
Connect the negative () wires from the PV array to the PV INPUT 1 NEGATIVE terminal.
Check that the wire is in the proper location and tighten the screw.
5.
Repeat this procedure for each PV array circuit, connecting the #2 PV Positive wire to the
terminal labeled PV INPUT 2 POSITIVE, etc.
NOTE: The solar arrays do not have to connect in the order marked on the board (this is just for
reference). All solar array positives on the combiner board are joined together AFTER the fuse.
L1 breaker
AC connection
L2 breaker
AC connection
Solar array
100 amp DC breaker
PVGFP (ganged)
1 amp DC breaker
PVGFP (ganged)
100 amp DC breaker
Solar DC terminal block
Solar input 4
+
-
Solar input 3
+
-
Solar input 2
+
-
Solar input 1
+
-
Solar input 5
+
-
Solar input 6
+
-
Solar DC Fuses
Grounding
block
L1
15 amp AC breaker
(ganged)
L2
15 amp AC breaker
(ganged)
Combiner board
