Power Export Limiter

Power Export Limiter

Short Description:

Anti Reverse Limiter with Modbus Connection for Knox Installa ons

High accuracy meter readings for Production/consumption monitoring
Import/Export meter readings for export Limitation functionality
Small and easy to install – in standard electrical panel
Supports residential commercial and utility-size installations
Support RS485 120Ω line termination

Anti Reverse Limiter with Modbus Connection for Knox Installa ons

High accuracy meter readings for Production/consumption monitoring
Import/Export meter readings for export Limitation functionality
Small and easy to install – in standard electrical panel
Supports residential commercial and utility-size installations
Support RS485 120Ω line termination

Limiter diagram

   

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
Connection of power line of limiter and CT clamp Installation position of CT:

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”.

Follow Fig2-5,
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.

2.2.2 Installation verification
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.

2.3.1 Installation instructions
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 .

Follow Fig2-6,
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

2.3.2 Installation verification
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.

Short Description:

Anti Reverse Limiter with Modbus Connection for Knox Installa ons

High accuracy meter readings for Production/consumption monitoring
Import/Export meter readings for export Limitation functionality
Small and easy to install – in standard electrical panel
Supports residential commercial and utility-size installations
Support RS485 120Ω line termination

Anti Reverse Limiter with Modbus Connection for Knox Installa ons

High accuracy meter readings for Production/consumption monitoring
Import/Export meter readings for export Limitation functionality
Small and easy to install – in standard electrical panel
Supports residential commercial and utility-size installations
Support RS485 120Ω line termination

Limiter diagram

   

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
Connection of power line of limiter and CT clamp Installation position of CT:

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”.

Follow Fig2-5,
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.

2.2.2 Installation verification
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.

2.3.1 Installation instructions
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 .

Follow Fig2-6,
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

2.3.2 Installation verification
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.