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Installation & Application（安装应用） KEJIA® KDY-I-15RX surge protective device has large current capacity and is a T1 class voltage limiting primary power surge protective device, it has the characteristics of no freewheeling, reliable performance and stable operation。According to the lightning protection principle, after the lightning energy is released once, there is still a high residual voltage on the power line. The lightning energy shall be released step by step through the cooperation of the post surge protector of the lightning protection system, so as to effectively protect the terminal electrical equipment.
When using the KEJIA® KDY-I-15RX surge protective device，power protection module is partially connected in parallel between the protected end and the ground (L1, L2, L3, N, and PE) lines. It is installed using DIN35 rails and can be installed in power distribution boxes and various standard cabinets. During partial wiring of SPD communication module, the working power terminal must be connected to the protection side of the power lightning protector, the sampling transformer should be connected in series in the down lead of the lightning protector, and the remote signaling terminal should be connected to the remote signaling contact of the power lightning protector to indicate the failure status of the power lightning protector. The RS-485 serial communication terminal should be connected to the remote intelligent management unit or the integrated automation system 485 bus (background host computer). The key operation and communication method of the NKP-LJ-04 SPD communication module are also shown in its user manual.
Terminal Definitions for NKP-LJ-04 Communication Module
1 — Power L1/+
2 — Power L3/-
3 — RS-485 Communication Output A
4 — RS-485 Communication Output B
5 — SPD Remote Signal (YX) Contact 1 (non-polarized)
6 — SPD Remote Signal (YX) Contact 2 (non-polarized)
7 — Current Transformer Output 1 (non-polarized)
8 — Current Transformer Output 2 (non-polarized)
KDY-I-15/440/3P
KDY-I-15/440/4P
Technical Parameters（技术参数） Nominal voltage Un : 220/380V AC
Maximum continuous operating voltage Uc: 440V AC
Nominal discharge current In : 100kA（8/20µs）
Maximum discharge current Imax: 200kA（8/20µs）
Impulse discharge current Iimp：15kA（10/350µs）
Voltage protection level Up:1800V
Front circuit breaker or fuse F: 315A
Telesignalling：1、3 normally off，2、3 normally on
Response time：25ns
Working temperature：-40℃—+80℃
Upper lead L/N: ≥6mm2
Lower lead PE : ≥10mm2
Sampling method: equipped with a special transformer to count the lightning current out of date；
Display mode: 2-bit 0.30 inch red high brightness LED digital tube；
Local address：hexadecimal 01H-FFH，corresponding decimal system 1-255；the default value for power-on is 01，it can be set to have the same number as the connected lightning protector by pressing the key；
Baud rate：9600、4800、2400、1200、600bit/s optional，the default value for power-on 9600bit/s，set by key；
Equipped with RS-485 communication interface, it adopts simplified MODBUS-RTU communication protocol to communicate with the management computer；
Maximum count： 99times，return to 01 times after full recording；
Data storage：Data storage after power failure,it can be stored for up to 10 years after power failure；
Installation: 35mm DIN guide rail, EN60715 standard.
Attention
When using surge protective device, there must be reliable PE grounding.
Ordering and Model Selection（订货选型） The KDY-I-15RX/440/4P is designed for TN-S three-phase five-wire power systems,;
The KDY-I-15RX/440/3P is designed for TN-C three-phase four-wire systems;
The KDY-I-15RX/440/2P is designed for single-phase two-wire/three-wire systems.
*Please send your quotation email containing specific product requirements (including model numbers, quantities, technical specifications, etc.) to the designated email: 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-I-15RX/440/4P Power Surge Protector PDF Document | Instruction manual | Download |
