Logicfox KTL-S 33kW Grid Connected PV Inverter Installation Guide

Logicfox KTL-S 33kW Grid Connected PV Inverter

Attention: Only trained electrically qualified personnel are permitted to do electrical operation on this product!

Packing List Check

• Check if the packaging is intact and the accessories are complete.

Note: Please download the User Manual from the company website: www.eastups.com

• Check if every machine module is intact.

| Description| Remarks
---|---|---
1| DC switch (option)| To control DC input on and off directly

2

|

LED display panel

| To display the inverter running state/communication status

3

| Electric meter & DRM

communication

| User electric meter communication & DRM (demand

response mode) interface

4

| WIFI&GPRS

communication terminal

|

To connect WiFi or GPRS communication module

5| AC output terminal| To feed the inverter output energy into the grid

6

|

Ventilation valve

| To prevent condensing and fogging, and balance differential pressure inside and outside the cabinet
7| PV+ input terminal| To connect the positive electrode of the PV module
8| PV- input terminal| To connect the negative electrode of the PV module
9| Cooling fan| To fan-cool the inverter

Machine Installation

• Choose a well-ventilated, no direct sunlight, no rain, and no snow installation location. It is recommended to be installed in a place such as an indoor garage or loft.

• Select a wall with sufficient space and a defined angle.

Note: Installed vertically or tilted backward no more than 15°, no lateral tilt or horizontal installation, wiring area should face downward.

• For good heat dissipation and easy disassembly, the minimum clearance around the inverter must not be less than the following values.

• Mark the position of clevis mounting holes on the wall. According to the specifications of the expansion screw, use an electric screwdriver to drill suitable mounting holes at the marks, and then fix the clevis to the wall.

• Align the inverter radiator mounting holes with the clevis and push it to the bottom, then hang it in line. Fasten the left and right sides of the clevis to the inverter bracket by using the screws provided respectively.

AC Side Wiring

• Attention: Before wiring, make sure the circuit breaker on the AC side is disconnected until the PV system is fully installed!
• Attention: If the user adds a residual current detector to the AC side, it is recommended a 300mA type B residual current detector!
• Wiring cable requirement: Since the peak current of AC short circuit measurement can reach 240A, please be sure to strictly follow the requirements of wiring and use the specified wire diameter of the cable.

wire diameter 16mm2
AC output L2 phase| 15-25KW recommend wire diameter 10mm2

30-33KW recommend wire diameter 16mm2

AC output L3 phase| 15-25KW recommend wire diameter 10 mm2

30-33KW recommend wire diameter 16mm2

AC output N phase| 15-25KW recommend wire diameter 10mm2

30-33KW recommend wire diameter 16mm2

Grounding cable| Recommend wire diameter 6~8mm2

• Strip the DC cable insulation layer of about 8mm to reveal the copper wire.

• Pass the appropriate length of cable through the waterproof joint end shield and the case.
• Insert the copper wire of the cable into the RNB terminal and press it tightly with crimping pliers.

• Use a screwdriver to fix the L1, L2, L3, N, and PE wire to the corresponding AC wiring terminal, ensure that the PE wire is reliably grounded, then lock the outlet box, and finally tighten the waterproof joint end shield.

DC Side Wiring

Attention: Before installing, make sure the inverter DC switch is off until the PV system is installed.
Attention: High DC voltage will be generated when the solar panels are sunlit. Please be careful to take appropriate protective measures!

• Strip the DC cable insulation layer of about 8mm to reveal the copper wire.

• Insert the copper wire of the cable into the metal core of the connector and compress it with a crimping plier, loosen the terminal cover, and pass the cable through the terminal cover. Insert the core into the wiring slot until you hear the sound of the connection in place.

• Tighten the terminal cover to ensure well waterproof performance. Connect the PV DC input connector to the corresponding polarity DC input port of the inverter until a slight “click” is heard.

Attention: Use a voltmeter with a DC voltage range over 1000V to check whether the wiring of the polarity of the PV array cable is correct and confirm that the open circuit voltage does not exceed the specification. When the ambient temperature is higher than 10℃, the PV array open circuit voltage should not exceed 90% of the maximum DC voltage of the inverter, otherwise, at low temperatures, the PV array voltage may exceed the maximum input voltage of the inverter and cause damage.

• Connect the PV DC input connector to the corresponding polarity DC input port of the inverter until a slight “click” is heard.

Grounding Protection Connection

• A protective grounding hole is right at the bottom of the inverter chassis. The user must ground the inverter through the grounding hole and fasten it with supplied M6*10 screws.

Attention: PE wiring on the AC side cannot replace this grounding protection, so make sure that both are reliably grounded.

Communication Connection

• Plug the WIFI module, GPRS module, or Ethernet communication module into the COM1 communication interface, and then tighten the fixing nut.
• Plug the RJ45 plug for meter communication and switching value input into the COM2 connector at the bottom of the chassis, for meter wiring, please refer to the User Manual.

Start the Machine

• Check that all parts of the PV system are installed correctly and firmly.
• The machine performs start-up detection (more than one minute), after the self-test passes, the machine will automatically run, and output power to the grid, and the green LED indicator is always on.

Note: Please refer to the User Manual for precautions.

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