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● The SPD is single-port, with electric shock protection, indoor fixed installation, and voltage limiting type.
● The SPD has a built-in disconnector. When the SPD fails due to overheating or breakdown, the disconnector will automatically disconnect it from the power grid and send an indication signal at the same time. The visible window shows white when the SPD is working normally, and red after failure and disconnection.
● 1P+N, 2P+N and 3P+N are composed of 1P, 2P, 3P SPD + NPE neutral-ground protection modules, which are applied to TT, TN-S and other power supply systems.
LYD2 Series Surge Protective Devices (hereinafter referred to as SPD) are brand-new replaceable SPDs developed on the basis of absorbing advanced foreign technologies. The SPDs are suitable for power supply systems with AC 50/60Hz and rated voltage below 380V, protecting against the effects of indirect or direct lightning strokes or other transient overvoltages. The SPDs feature common mode (MC) and differential mode (MD) protection. The products comply with GB18802.1, IEC61643-1 and other relevant standards.
| Item | LYD2-65 | LYD2-40 | LYD2-15 | LYD2-8 | ||||
| Maximum Continuous Operating Voltage Uc (VAC) | 420 | 275 | 420 | 275 | 420 | 275 | 420 | 275 |
| Voltage Protection Level Up (kV) ≤ | 2.5 | 2.0 | 2.0 | 1.2 | 1.5 | 1.0 | 1.2 | 0.8 |
| Maximum Discharge Current (8/20μs) Imax (kA) | 65 | 65 | 40 | 40 | 15 | 15 | 8 | 8 |
| Nominal Discharge Current (8/20μs) In (kA) | 30 | 30 | 15 | 15 | 5 | 5 | 2 | 2 |
| Response Time (ns) | <25 | |||||||
| Ambient Temperature | -40℃~+80℃ | |||||||
| Protection Class | IP20 | |||||||
| Failure Indication | White for Normal, Red for Failure | |||||||
| Application | Incoming Line Protection | |||||||
| Remote Signaling Function | Optional Accessory | |||||||
● It is installed at the junction of LPZ0B or LPZ1 zone and LPZ2 zone, mounted on a 35mm standard DIN rail, with 2.5~35mm² multi-strand copper flexible connecting wires.
● Each pole of the SPD must be protected by a fuse or a miniature circuit breaker. Users can freely combine single-phase or three-phase surge protective devices according to their needs.
● To prevent the failure of surge protective devices from affecting the safe operation of the power grid, a matching LYSCB backup protector must be connected in series at the front end of each pole of the SPD.
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