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Home Product Center Power SPD Class II (T2) Power SPD KDY-40/440/
surge protective device
KDY-40/440/
surge protective device
Imax:40kA;Uc:440V
Product Features
  • High-quality surge protection components ensure reliable performance;
  • Compact structural design with aesthetically pleasing appearance;
  • Thermal disconnect mechanism provides long service life with visual fault indication;
  • Maximum discharge capacity of 40kA with nanosecond-level response time;
  • Standard DIN rail mounting enables quick installation and easy maintenance.
KDY-40/440/ <br/>surge protective device
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.


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KDY-I-100/440/4P(图4)

Technical Parameters(技术参数)

Maximum continuous operating voltage Uc: 440V AC (L-PE).

Rated discharge current In : 20kA (8/20μs).

Maximum discharge current Imax: 40kA (8/20μs).

Voltage protection level Up: 2200V

Front empty open or fuse F: 32A

Top lead : ≥4mm2

Lower lead : ≥6 mm2

Mounting: 35mm DIN rail, EN60715 standard                   

Notice

There must be a reliable PE ground when using a power surge protective device.

When the transparent window is green during normal use, when the window turns red,

It means that the power surge protective device has failed, and it needs to be replaced with a new product in time.


*The product parameters are subject to the actual product manual.
Ordering and Model Selection(订货选型)

The KDY-40/440/4P is compatible with TN-S three-phase five-wire power systems.

The KDY-40/440/3P is designed for TN-C three-phase four-wire power systems.

The KDY-40/440/3P+N supports TT-C three-phase four-wire power systems.

The KDY-40/440/2P works with single-phase two-wire/three-wire power systems.

The KDY-40/440/1P+N is suitable for single-phase two-wire power 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-40/440/4P Power Surge Protector PDF Document Instruction manual Download
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