Surge protective device 20~40kA /Three phases AC380V SPD

Power SPD 40KA, standard type MOV SPD 1,Test standard: IEC61643-1 2,Imax: 40kA, In: 20kA, Up: 2.2kV 3,20years` experiences

Surge protective Device     APPLICATION

Surge protective Device (surge protection device, SPD )  provides protection against surge current resulted from direct or indirect lightning strike or similar surge voltage. SPD is applicable to circuit with rated voltage up to 440V~, rated frequency 50/60Hz.The product, using metal oxide varistor,  designed to protect both phase and neutral line, is of high electricity resistance under normal operations. In case of surge current or voltage caused by lightning strike or similar, SPD functions quickly conduct the surge voltage/current to earth and thus effectively prevent the downstream equipments of its protected line from destruction. SPD resumes its high electricity resistance to secure normal operation of the protected power network without presence of the surge voltage.

Functions

1. protection of heavy-loaded electrical circuits from overload2. used to protect not only particular consumers/circuits, but also the whole panel3. Pillar terminal with clamp4. On-Off indicating window:Green: normal functionRed: functionless,  immediate replacement required

 Technical parameter

Model and specification	KDY-40/440/4P
No. of poles	4P/2P
Power supply system	TT/TN/IT
Protection grade	C class
Operation voltage Un(V)	AC220
Max. continuous operating voltage Uc(V)	AC440
Voltage protection level Up(kV)-Less than	2.2
Max. discharging current(8/20 us) Imax(kA)	40
Normal discharging current (8/20 us) In(kA)	20
Status indication	Mechanical flag
Dimension	72mmx91mmx63mm
Response time(ns)	≤25
Ambient temperature	-40°C to +80°C
Relative humidity	On condition that room temperature 30% to 90%
Shell material	PA6-5-3
Protection level	IP20
Installation	35mm DIN rail, EN 60715 standards
Test grade	GB18802.1/IEC61643-1 standards

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