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● The SPD is single-port type, with electric shock protection, indoor fixed installation, and voltage-limiting design.
● The SPD is equipped with a built-in thermal disconnector. When the SPD fails due to overheating or breakdown, the disconnector will automatically disconnect it from the power grid and trigger an indication signal. The visual window shows 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-C 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 II surge protective devices complying with IEC61643-1:1998-02 and Type C 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-C40 Rated Values | |||||||
| Maximum Continuous Operating Voltage Uc (VAC) | 1000 | 750 | 420 | 385 | 320 | 275 | 175 | 48 |
| Voltage Protection Level Up (kV) ≤ | 3.5 | 3.0 | 2.0 | 1.8 | 1.6 | 1.5 | 1.3 | 0.6 |
| Maximum Discharge Current (8/20μs) Imax (kA) | 40 | |||||||
| Nominal Discharge Current (8/20μs) In (kA) | 20 | |||||||
| Response Time (ns) | <25 | |||||||
| Protection Class | IP20 | |||||||
| Failure Indication | White for Normal, Red for Failure | |||||||
| Application | Secondary Incoming Line Protection | |||||||
| Remote Signaling Function | Optional Accessory | |||||||
| Ambient Temperature | -40℃~+80℃ | |||||||
| Remark | Other Uc Values are Customizable | |||||||
● Installed at the junction of LPZ0B / LPZ1 zone and LPZ2 zone, mounted on 35mm standard DIN rail, connected with copper stranded wires of 2.5~35mm².
● Each pole of the SPD must be equipped with backup protection — LYSCB series surge backup protectors are used for short-circuit protection after SPD breakdown.
● Suitable for installation in floor distribution boxes, computer centers, telecommunication rooms, elevator control rooms, CATV rooms, fire control centers, villas, residential distribution boxes, etc.
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