Lightning Surge Protector AC275V 20-40KA Lightning Arrester

The 275V lightning surge protector (SPD) is an overvoltage protection device used in low-voltage electrical systems. Its core function is to protect against surge voltages caused by lightning or abnormal grid conditions, ensuring the safety of equipment. The specific usage functions are as follows:

Surge voltage interception: When an instantaneous overvoltage exceeding 275V occurs in the circuit (such as surges generated by lightning induction or grid switch operations), it can quickly conduct and discharge the excessively high voltage to ground, preventing equipment from being damaged by breakdown.

Normal circuit maintenance: When the grid voltage is normal (not exceeding 275V), maintain a high-impedance state to ensure normal power supply to the circuit and stable operation of the equipment.

Overload protection and indication: Some models are equipped with overload protection function. When the surge current is too large, it will automatically disconnect to prevent self-damage. At the same time, the working status (such as normal or faulty) is indicated through indicator lights and other means, facilitating maintenance.

product details

Detailed picture

Scope of application

To specify the severity of LEMP in different parts of the lightning protection area and to specify the location of equipotential junction points at the boundary of each area, protection will be provided Is divided into multiple minefields (LPZ).

• LPZOA area; All objects in this area may be struck by direct lightning and lead away all lightning currents without attenuation of the electromagnetic field.

• LPZOB area: this area is within the range corresponding to the selected light ning protection ball radius, each object may be directly struck by lightning, and the electromagnetic field does not attenuate.

• LPZ1 area: each object in this area is impossible to be attacked by direct ligh tning. The intensity of lightning current and electromagnetic field passing through each conductor is attenuated. The attenuation depends on the shielding measures of the building.

• LPZ2 area: When it is necessary to further reduce the incoming lightning current and the intensity of electromagnetic field, follow-up mineproof areas should be added, such as shielded machine room, metal shell of equipment, case, cabinet, etc.; According to the environment of the protected object to choose theconditions of the lightning protection area.

• When working normally, the visual window shows green; Displays red after failure and disengagement.

Type Instruction

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Wiring Method

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Parameter Information

Product name	Surge Protector	Voltage protection level up	≤1.8kV
Product model	SRU6-C40	Max discharge current Imax	40KA（8/20u）
Maximum continuous operating voltage	275V	Nominal discharge current In	20KA（8/20u）
The number of	2P	Response time NS	<25
Protection level	IP20	Failure indication	Aging failure: Green normal, red failure