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LT AC surge protector

Model description

Application scope

LT series surge protective devices are designed and manufactured according to GB18802.1-2011 and IEC616343-1:2005. They are suitable for AC 47-63Hz's power supply system such as TT, IT and TN, so as to prevent all kinds of electronic and electrical equipment from being damaged by lightning overvoltage.

Working principle

Under normal conditions, the surge protector is in a high resistance state. When the surge or overvoltage occurs due to lightning or other reasons, the protector will rapidly lead in the nanosecond time, and the surge and overvoltage will be introduced into the earth, thus protecting the power equipment on the grid. When the surge overvoltage is disappearing, the protector is restored to a high resistance state. It does not affect the normal operation of the power grid and equipment.

technical parameter

Model	LT-200	LT-100	LT-80	LT-40	LT-20	LT-10
Maximum continuous operating voltage Uc（V~）	385/440	385/440	385/440	385/440	385/440	320/385
Nominal discharge current In（kA)	100	60	40	20	10	5
Maximum discharge current lmax(kA)	160	100	80	40	20	10
Protection level Up(kA)	＜2.5/3.0	＜2.5/3.0	＜2.5/3.0	1.8/2.2	1.6/1.8	1.4/1.5
response time t(ns)	＜25	＜25	＜25	＜25	＜25	＜25
Intercepting area of access wire （mm²）	≥16	≥16	≥10	≥6	≥6	≥4
Intercepting area of grounding wire （mm²）	≥25	≥25	≥16	≥10	≥10	≥6
Anterior recommendation series fuse （A）	320	250	125	63	40	32
work environment （℃）	-40~+70℃
relative humidity	≤95%（25℃）