- Contact Person : Ms. Xia Athena
- Company Name : Shanghai LERDN Lightning Protection Co., Ltd.
- Tel : 86-21-3632 1681
- Fax : 86-21-51062207
- Address : Shanghai,Shanghai,2/F., 305 Jiangchang No.3 RD., Shanghai Shibei Industrial Park, China, 200436
- Country/Region : China
- Zip : 200436
Surge Arrestor
Surge Arrestor
Application range
LDY-30A/50A are applied to equipotential bonding of the low voltage side of transformer or main low voltage distribution boxes inside the building, providing protection against the overvoltage arising from the lightning strike to power supply system of class I or faulty operation, but they are not applied to the system of the expected short-circuit current beyond rated breaking afterflow current. The series fuse must be at the front-end of the product, otherwise, the surge protector may be burned out by the developed power flowcurrent, while the product is discharging. (Option from standard IEC61643-1 and GB50343)
Main Feature
The two electrodes are connected to the line L (or line N) and line PE respectively. An electric gap is formed between the two electrodes. The high-impedance state exists between the two electrodes when the electric network runs under the striking voltage. If the voltage between the two electrodes surpasses the striking voltage arising from the lightning or faulty operation on the electric network, arc through the electric gap and power energy releases through arc discharge. The arc will be extinguished by the arc quenching system consisting of detached arc slices and arc quenching room and the electric gap resumes to high-impedance state. The discharge gap is totally-enclosed and No arc escape.
Main technical data
Type | LDY-30A | LDY-50A |
Part No. | 081510 | 081502 |
Impulse discharge current Iimp (10/350μs) kA | 30 | 50 |
Rated load voltage Un V | 230 | |
Max. continuous operating voltage Uc V | 255 | |
Voltage protection level Up kV | < 0.8 | |
Ability of anti-short-circuit of the Max. backup fuse | 50kA | |
Rated breaking afterflow current | 3kA | |
Insulating resistance | > 5MΩ | |
Response time tA ns | < 100 | |
Protection modes | 1P, 2P, 3P,4P | |
Housing material | Enhanced flame retardant nylon (light gray, flame retardancy degree: V0) | |
Max. backup fuse/air-break switch | 250A gL | |
Cross-section | ≥ 16 mm2 stranded/flexible conductor | |
Surge Arrestor
