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To wire for well application, pass the water level switch cable through the
waterproof PG terminal and connect to the I3 and COM terminals(remove the
short-circuit strip between the two first), for tank application, connect to the I1 and
COM terminals as shown in Fig. 12.
Fig 11: Water Level Switch
Installation for Well/Tank
3.7 Others
A DC circuit breaker should be installed as protection switch for solar DC input.
Ÿ
The inverter has one pair of DC input terminals. If the solar modules are multi-
Ÿ
paralleled, an additional solar combiner box is necessary.
The inverter must be grounded reliably and the grounding cable properly sized and
Ÿ
as short a possible. If possible, the inverter should be grounded separately.
In areas with high incidence of lightning, it is recommended to install an external
Ÿ
surge protector at the power input of the inverter.
If the inverter is far from the motor (>200m), it is recommended to install on output
Ÿ
reactor or filter.
It is recommended to install input and output reactors, dedicated filters and
Ÿ
magnetic rings at the input and output of the inverter which can effectively reduce
the noise and avoid interference with other components.
Consult nearest Davis & Shirtliff dealer for the extra accessories such as PV
Ÿ
disconnect switch/DC breaker, combiner, surge suppressor and reactors.
Model
SV3/1.5M
SV3/2.2M
SV3/3.7M
SV3/3.7T
SV3/5.5T
SV3/7.5T
SV3/11T
SV3/15T
SV3/18T
SV3/22T
AC Breaker (A)
25
40
50
25
25
40
50
63
63
100
Fig 12: Water Level Switch
Wiring Diagram
DC Breaker
16A/750VDC
25A/750VDC
25A/750VDC
16A/1000VDC
25A/1000VDC
25A/1000VDC
40A/1000VDC
63A/1000VDC
4
63A/1000VDC
80A/1000VDC
4 14
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