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The SPD is single-port type with electric shock protection, designed for indoor fixed installation and voltage-limiting operation.
The SPD is equipped with a built-in disconnector. When the SPD fails due to overheating or breakdown, the disconnector automatically disconnects it from the power grid and sends an indication signal. The visual window displays white for normal operation and red for failure.
1P+N, 2P+N and 3P+N models consist of 1P, 2P, 3P SPD modules plus NPE neutral-ground protection modules, suitable for TT, TN-S and other power supply systems.
LYD1-D series surge protective devices (hereinafter referred to as SPD) are suitable for low-voltage AC power distribution systems including IT, TT, TN-C, TN-S and TN-C-S, providing protection against surges caused by indirect/direct lightning strikes or other transient overvoltages. They are Class III surge protective devices complying with IEC61643-1:1998-02 and Type D surge protective devices. Featuring common mode (MC) and differential mode (MD) protection, the product meets standards including GB18802.1 and IEC61643-1.
| Model & Specification | LYD1-D20 | LYD1-D10 | ||||||||
| Maximum Continuous Operating Voltage Uc (VAC) | 750 | 420 | 385 | 320 | 275 | 750 | 420 | 385 | 320 | 275 |
| Voltage Protection Level Up (kV) ≤ | 2.5 | 1.8 | 1.5 | 1.4 | 1.2 | 2.0 | 1.6 | 1.3 | 1.2 | 1.0 |
| Maximum Discharge Current (8/20μs) Imax (kA) | 20 | 10 | ||||||||
| Nominal Discharge Current (8/20μs) In (kA) | 10 | 5 | ||||||||
| Response Time (ns) | <25 (Universal) | <25 (Universal) | ||||||||
| Protection Class | IP20 (Universal) | IP20 (Universal) | ||||||||
| Failure Indication | White for Normal, Red for Failure (Universal) | White for Normal, Red for Failure (Universal) | ||||||||
| Application | Tertiary Incoming Line Protection (Universal) | Tertiary Incoming Line Protection (Universal) | ||||||||
| Remote Signaling Function | Optional Accessory (Universal) | Optional Accessory (Universal) | ||||||||
| Ambient Temperature | -40℃~+80℃ (Universal) | -40℃~+80℃ (Universal) | ||||||||
| Remark | Other Uc Values are Customizable (Universal) | Other Uc Values are Customizable (Universal) | ||||||||
Installed at the junction of LPZ1 / LPZ2 zone and LPZ3 zone, mounted on 35mm standard DIN rail, connected with copper stranded wires of 2.5~16mm².
Each pole of LYD series must be equipped with backup protection — LYSCB series surge backup protectors are used for short-circuit protection after SPD breakdown.
Suitable for installation in residential distribution boxes, or in the socket boxes in front of or nearest to computer equipment, information equipment, electronic equipment and control equipment.
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