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● LYD1-I25 is a single-port, indoor-installed voltage switching type SPD.
● Designed in accordance with current national standards including GB50057 and GB18802.1, the product features high impulse current (Iimp: 25kA) and low residual voltage (Up < 2.5kV).
● Its core component is composed of stacked multi-stage high-energy discharge tube gaps.
● Through elaborate design, the product combines multi-stage discharge tubes to form a fully sealed structure. No arc leakage will occur when surge current passes through, so no special space for arc leakage is required during installation, ensuring stable and reliable quality.
LYD1-I25 Surge Protective Devices (hereinafter referred to as SPD) are suitable for TT, TN and other power supply systems of 50/60Hz AC and below 420V, providing protection against lightning strikes or other transient overvoltages. They are applied for Class I (Class B) lightning protection of power systems in areas with high lightning risk, installed at the junction of LPZ0B zone and LPZ1 zone. The product complies with GB50057 and GB18802.1 standards.
| Item | LYD1-I25 | |
| Lightning Protection Zone | Class I | |
| Maximum Continuous Operating Voltage Uc (V) | 275 | 420 |
| Voltage Protection Level (8/20μs) Up (kV) | 2.5 | 2.5 |
| Maximum Impulse Current Iimp (10/350μs) (kA) | 25 | 25 |
| Nominal Discharge Current In (8/20μs) (kA) | 25 | 25 |
| Response Time (ns) | ≤100 | ≤100 |
| Ambient Temperature | -40℃~+80℃ | -40℃~+80℃ |
| Protection Class | IP20 | IP20 |
| Failure Indication | White for Normal, Red for Failure | White for Normal, Red for Failure |
| Remote Signal Contact | Optional Accessory | Optional Accessory |
| Installation | Mounted on 35mm DIN Rail | Mounted on 35mm DIN Rail |
● The product is installed at the junction of LPZ0A / LPZ0B zone and LPZ1 zone, or at the main distribution box (cabinet) for power incoming, mounted on 35mm standard DIN rail. Connecting wires adopt 6~35mm² multi-strand copper flexible cables.
● The grounding wire shall use bicolor wires with cross-section ≥16mm² and length ≤500mm.
● To prevent the failure of surge protective devices from affecting the safe operation of the power grid, a matching LYSCB backup protector shall be connected in series with the protector connected to the L line.
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