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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 : 220V AC
Maximum continuous operating voltage Uc: 320V AC
Discharge current rating In :30kA（8/20µs）
Maximum discharge current Imax: 60kA（8/20µs）
Voltage protection level Up: 1800V
Front circuit breaker or fuse F: 40A
Upper lead L/N: ≥4mm2
Lower lead PE : ≥6mm2
Installation: 35mm DIN guide rail, EN60715 standard
Attention:
When using Surge protective device, there must be reliable PE grounding.In normal use, the inside of the transparent window is green. When it turns red means the power lightning protector has failed and needs to be replaced in time.
Ordering and Model Selection（订货选型） The KDY-60/320/4P is suitable for TN-S three-phase five-wire power supply systems.
The KDY-60/320/3P is suitable for TN-C three-phase four-wire power supply systems.
The KDY-60/320/3P+N is suitable for TT-C three-phase four-wire power supply systems.
The KDY-60/320/2P is suitable for single-phase two-wire/three-wire power supply systems.
*Please send the inquiry email containing specific product requirements (such as model, quantity, technical parameters, etc.) to the designated email address salina@kejia.com.
（请将包含具体产品需求（如型号、数量、技术参数等）的询价邮件发送至指定邮箱 salina@kejia.com）
Download
| File name | Product type | Download |
|---|---|---|
| KDY-60/320/4P Power Surge Protector PDF Document | Instruction manual | Download |
