Products
Products
Installation & Application（安装应用） AC System: When using KEJIA® KDY series power surge protectors for three-phase four-wire power systems, four units can be connected in parallel between the protected terminals and ground (L, N lines and PE), which is called the TN-S connection method. Alternatively, three units can be connected in parallel between L and N lines, with an additional gas discharge surge protector connected between N and PE lines, known as the TT connection method. For single-phase power systems, one surge protector can be connected in parallel between each of the L and N lines to ground (PE).
DC System: When using KEJIA® KDY series DC power surge protectors, two surge protectors can be connected in parallel between the two lines of the DC power system and ground (+, - lines and PE), and the PE terminal grounding must be reliable.
RS-485 Communication Series (optional): The power surge protector is a combination product of power surge protection and NKP-LJ-04 surge detection communication. This product features a high-brightness LED digital display that can collect the failure status of the surge protection module, lightning strike counts, and lightning strike occurrence times, and send signals to the background management system through the RS485 interface. For the button operations and communication methods of the NKP-LJ-04 communication module, please refer to its user manual.
Technical Parameters（技术参数） Nominal voltage Un: 220/380V AC
Maximum continuous operating voltage Uc: 440V AC
Rated discharge current In: 65kA (8/20μs).
Maximum discharge current Imax: 100kA (8/20μs).
Voltage protection level Up: 2500V
Upper lead L/N: ≥6mm2
Lower lead PE : ≥10 mm2
Mounting:: 35mm DIN rail , EN60715 standard
Notice
Reliable PE grounding is a must when using a surge protective device.
When in normal use, when the window turns red, indicates that the surge protective device has failed and needs to be replaced with a new product in time.
Ordering and Model Selection（订货选型） | Product model | Product description |
|---|---|
| KDY-100/440/1P+N | The modular Class B power surge protective device (SPD) is suitable for single-phase two-wire/three-wire power systems with poor grounding conditions, featuring a maximum discharge current of 100kA (8/20μs) and standard DIN-rail mounting。 |
| KDY-100/440/2P | Modular Type B power surge protective device (SPD) for single-phase two-wire/three-wire power systems, featuring 100kA maximum discharge current (8/20μs) and standard DIN-rail mounting。 |
| KDY-100/440/3P | Modular Type B power surge protective device (SPD) for TN-C three-phase four-wire power systems, with 100kA maximum discharge current (8/20μs) and standard DIN-rail mounting。 |
| KDY-I-12.5/440/3P+N | Modular Type B Surge Protective Device (SPD) for TT three-phase four-wire power systems, featuring 100kA maximum discharge current (8/20μs) with standard DIN-rail mounting。 |
| KDY-100/440/4P | Modular Type B Surge Protective Device (SPD) for TN-S three-phase five-wire power systems, featuring 100kA maximum discharge current (8/20μs) and standard DIN-rail mounting。 |
Download
| File name | Product type | Download |
|---|---|---|
| KDY-100/440/4P KDY-100/440/4P Type 2 Power Surge Protective Device (SPD) - Classic Case Study PDF Document | Instruction manual | Download |
