Lux Power Technology SNA5000WPV User Manual page 7

2.4 CT
To measure the power imported from and exported to the grid, a pair of Cts must be installed at the
service entry point in or near the main service panel. External Grid CT" function is off by default, and if
you need inverter to export power to compensate the grid loads, you can set "External Grid CT"
function to "Enable" state. Please refer to section 4.4 LCD Settings for detected setting info.
CT Port Pin definition
The CT interface for CT connection is a RJ45 port
Pin Description
CT-L1
1/3
B
A
2/4
CT1N
5
6 CT1P
7
B2
8
A2
Pin
1 2 3 4 5 6 7 8
09
MPPT485/CT
NTC
Parallel
Please refer to the connection diagram for the correct positions of Grid CT and clamp the CT on
the wires at the service entry point in the main service panel. The arrow on the CT is pointing to the
inverter.(*** Incorrectly install CT will cause The Display to show incorrect information and features
of the inverter will not function correctly) If the CT is in a wrong direction, there is an option you can
change the direction of the CT on your inverter call: CT Direction Reversed in Advanced Tab. You
would not need to go change it physically.
5 6
TO Grid
Pin6
Pin5
CT Clamp Ratio
The inverter support 3 ratios of CT clamp- 1000:1 ,2000:1 and 3000:1 . The CT ratio of the CTs in the
accessory bag is 3000:1. If you are using a 3rd party CT, please ensure the CT ratio is one of them, and
select the correct CT ratio setting in the inverter monitor page or on the inverter LCD.
BAT+
CT
GRID
TO PCS
L
CT
P
N
PVA+ PVA- PVB+ PVB- L N PE L N L N
AC INPUT AC OUTPUT GEN
BAT-
10