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） Maximum continuous operating voltage Uc: 385V AC (L-PE).
Rated discharge current In : 40kA(8/20μs).
Maximum discharge current Imax: 80kA (8/20μs).
Voltage protection level Up: 2100V
Front empty opening or fuse F: 40A
Response time< 25ns
Top Lead: ≥4mm2
Lower lead: ≥6mm2
Mounting: 35mm DIN rail, EN60715 standard
Notice
There must be a reliable PE grounding when using the surge protective device.
During normal use, the transparent window is green, and when the window turns red,
It means that the power surge protector has failed and needs to be replaced with a new product in time.
订货选型 | 文件名 | 描述 |
|---|---|
| KDY-80/385/2P | Modular Type B Surge Protective Device (SPD) for single-phase two-wire/three-wire power systems, featuring 80kA maximum discharge current (8/20μs) with standard DIN-rail mounting。 |
| KDY-80/385/3P | Modular Class B power surge lightning protector, suitable for TN-C three-phase four-wire power systems, maximum discharge current 80kA (8/20μs), standard rail mounting。 |
| KDY-80/385/3P+N | Modular Class B Power Surge Arrester, suitable for TN-C three-phase four-wire power systems, maximum discharge current 80kA (8/20μs), standard DIN rail mounting。 |
| KDY-80/385/4P | Modular Class B Power Surge Protective Device (SPD), suitable for TN-S three-phase five-wire power systems, with a maximum discharge current of 80kA (8/20μs), standard DIN-rail mounting。 |
Download
| File name | Product type | Download |
|---|---|---|
| KDY-80/385/4P Type 2 Surge Protective Device (SPD) PDF Document | Instruction manual | Download |
