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Surge Protection Device (SPD)

The RY3 series surge protection device, abbreviated as SPD, is used in the IT, TT, TN-S or TN-C-S system, whose rated voltage is less than 380V and frequency is AC 50 or 60Hz, at the junction of LPZ0 or LPZ01 and LPZ2 to protect the electrical equipment in the system from lightning. It is designed in compliance with GB18802.1 and IEC61643-1.

Mounted on a 35mm standard rail, our product is equipped with a disconnecting module. This module can disconnect the SPD failed due to overcurrent-induced overheating from the power system and turn the visual window from green to red.

1. Our surge protection device is able to withstand the impact of 20kA 8/20μs lightning current.
2. Its response time is less than 25ns.
3. The visual window displays the working status of the product. Green means normal and red indicates a fault.
4. The built-in disconnecting module can be replaced without cutting off the power.

Model Description
Main Technical Parameters of Surge Protection Device
Model RY3
Protection Level C, D
Rated Operating Voltage Un (V AC) 110, 220, 380
Maximum Continuous Operating Voltage Uc (V AC) 140 275 320 385 420 550
Voltage Protection Level Up (kV AC) ≤ 0.8 ≤ 1.5 ≤ 1.5 ≤ 2.0 ≤ 2.1 ≤ 2.5
Nominal Discharge Current In (8/20 μs) kA 40 20
Maximum Discharge Current Imax (8/20 μs) kA 20 10
Response Time ns < 25
Operating Environment ℃ -40 ℃ ~ +85℃
Max. Connection Wire Diameter (mm2) 35
Recommend Connection Wire Diameter (mm2) 16 or 25 copper line
Fuse (A) Maximum: 32
Installation 35mm standard rail
Housing Material Enhanced, flame-retardant nylon

Related Names
Electricity Surge Protector | Electrical Surge Guard | Overvoltage Protection Device

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