DC Power Supply PV SPD 1000V Household Use 20KA 40KA SPD for Solar System

  PV Surge Protective Device 

1.Introduction

DKG-20 3P photovoltaic surge protective device is a parallel type module DC power surge protection device(short for SPD), which is dedicated to the lightning protection of photovoltaic DC power distribution system. Adopted high temperature and resistant flame retardant plastic shell, with the features of good sealing, good appearance, easy installation, dust-proof, anti-corrosion and flame retardant, this product can work stably under a harsh environment. This product is used for lightning protection of DC power distribution equipment, such as photovoltaic combiner box, photovoltaic DC power distribution cabinet and grid tie inverter.

It is designed as module with 35mm din rail mounting. It has working indication window in each line. When working indication window turns red, the SPD breaks down. With temperature control circuit breaker and built-in over current protective circuit, this modular SPD can automatically release to avoid fire danger when it breaks down. The optional remote alarm function is convenient for remote monitoring and automated management. The main module and the base are replaceable. It can be used for lightning protection of  +-PE,--PE.

2. Application Scope

DKG-20 3P photovoltaic DC surge protective device is dedicated to the lightning protection of photovoltaic DC power distribution system.

3. Technical Parameter

4.Installation Instruction

1) DKG-20 photovoltaic DC power surge protective device shall be installed in the front end of DC power distribution equipment. It is installed in the output bus of PV combiner box, or the input terminal of DC power distribution cabinet/box and grid tie inverter. It is in parallel connection with the power grid (Please pay attention to the power line and the ground wire);

 2) When installation, please use Kevin Connection Mode as soon as possible, that is, shuck off the Insulating Layer from the Middle of Power Distribution Power Line, then put the Power Line in the relative connection terminal and tighten the screw;

 3) When using the General Parallel Connection Mode, the conductor sectional area of power SPD should be in the range from 4mm to 35mm(the specific conductor size, please choose according to the size of distribution power line). The length of connecting line should be less than 0.5 meter;

 4) The sectional area of grounding connection line should be larger than the power connection line, and the distance from the grounding wire to grounding assembly row should be less than 1 meter.

Installation Wiring Diagram

(The appearance in kind prevail)

5.Remote Alarm

The product can be matched with remote signaling alarm function.When the surge protective device is normal, COM is public output port, the NC is normally closed dry contact output, and NO is normally open dry contact output. The wiring diagram of remote alarm is shown as below:

Remote Alarm Terminal Wiring Diagram

6. Ordering Instruction

Please declare the maximum discharge current of required product when ordering. If it's not clear, it can be selected by the professional personnel of our company after site survey.

7. Maintenance

The indication window is green when the SPD is normal. The SPD breaks down when the indication window turns red, which means the lightning protection function is in failure. Please remove the damaged SPD timely, replace with a new module, and check if the screws are loosed. (Note: the power must be disconnected during installation, charged operation is strictly prohibited; the grounding wire should be as short and thick as possible, and the grounding resistance shall be less than 10 Ω.)

8. Pictures