Anti Reverse Limiter with Modbus Connection for ThinkPower Installa ons
Power Input |
Power line |
CT-R |
Connected to R phase CT clamp |
CT-S(only for three phase) |
Connected to S phase CT clamp |
CT-T(only for three phase) |
Connected to T phase CT clamp |
Switch Com |
Connected to inverter com |
LED-Power |
Led will turn on after power input connected |
LED-R |
1) Led will turn off if r phase of power input not connected2) Led will blink, on 2 seconds and off 2 seconds if power consumption on r phase from grid larger than 300 watts
3) Led will blink, on 0.5 seconds and off 0.5 seconds if power reverse to grid on r phase larger than 300 watts 4) Led will be on continuously if power from or reverse to grid on r phase less than 300 watts |
LED-S (only for three phase) |
Similar behavior for S phase as LED-R |
LED-T (only for three phase) |
Similar behavior for T phase as LED-R |
Three phase anti reverse limiter has 3 CT clamps, CT should be installed
between meter and grid accordingly before meter.
Note:The CT clamp has arrow symbol, it's direction should follow "Grid Side" to "Meter Side".
Fig 2-5 CT Connection
a) R phase wire pass through the CT1 in the direction of the arrow on the CT clamp, and connect the CT1 to CT-R terminal of limiter;
b) S phase wire pass through the CT2 in the direction of the arrow on the CT clamp, and connect the CT2 to CT-S terminal of limiter;
c) T phase wire pass through the CT3 in the direction of the arrow on the CT clamp, and connect the CT3 to CT-T terminal of limiter;
d) The power line is a four core cable with color yellow, green, red and blue. Connect the yellow wire to R phase of the grid, green to S phase, red to T phase and blue to neutral.
You can follow below steps to verify if your installation is correct.
① Keep the power line of limiter connected
② Unplug the AC connecter of the inverter
③ If the symbol on the inverter screen blink 2 seconds on and 2 seconds off, it means com cable connection between inverter and limiter is OK
④ Plug CT-R, Unplug the CT-S and CT-T terminal of the limiter.
⑤ Turn on some power consumption equipment to make R phase load larger than 300 watts, the LED-R on limiter should blink 2 seconds on and 2 seconds off, if not, check if the direction of R phase CT clamp reversed.
⑥ Plug CT-S, unplug CT-R and CT-T, turn on some power consumption equipment
to make S phase load larger than 300 watts, the LED-S on limiter should blink 2 seconds on and 2 seconds off, if not, check if the direction of S phase CT clamp reversed.
⑦ Plug CT-T, unplug CT-R and CT-S, turn on some power consumption equipment
to make T phase load larger than 300 watts, the LED-T on limiter should blink 2 seconds on and 2 seconds off, if not, check if the direction of T phase CT clamp reversed.
⑧ Resume all connection, the anti reverse system will work normally.
① Connect the inverter to PV arrays and public grid, the same as normal on grid system.
② Connect communication cable between limiter and inverter(Same as step 2 in chapter 2.2.1)
③ Connection of power line of limiter and CT clamp
Installation position of CT:Single phase anti reverse limiter has one CT clamp, CT should be installed between meter and grid accordingly before meter .
a) Live wire pass through the CT in the direction of the arrow on the CT clamp, and connect the CT to CT-R terminal of limiter;
b) The power line is a two core cable with color blue and brown. Connect the blue line to neutral and brown to live
You can follow below steps to verify if your installation is correct.
① Keep the power line of limiter connected
② Unplug the AC connecter of the inverter
③ Turn on some power consumption equipment to make load larger than 300 watts, the LED-R on limiter should blink 2 seconds on and 2 seconds off, if not, check if the direction of CT clamp reversed.
④ Resume all connection, the anti reverse system will work normally.