Surge protection box for power(with airbreak switch)

LZA-/FS Series
Application range
These series are applied to equipotential bonding of the low voltage main or distribution boxes in the building, providing protection against the overvoltage arising fromthe lightning strike to power supply system or faulty operation.(option from IEC61643-1 and Gb50343 standard)
Main structure and work principle.
☆ Convenient wiring standard connection components
☆ Build-in temperature control and circuit breaking technology, high security performance.
☆ Green light in notice window indicates normal, red indicates broken, replacement notice, which are clear and easy distinguished.
☆ Function of lightning count capable of storage and display of lightning frequency
☆ Display status of ormal on and normal off.
☆ Totally-enclosed metal shell good shielding effectiveness free maintenance
Main technical data
Type LZA-20C/2FS（3FS） LZA-40B/2FS（3FS）
Norminal working voltage Un V 220V 380V 220V 380V
Max. continuous AC Voltage Uc V 385 385
Voltage protection level Up KV ＜1.8 ＜2.0
Norminal discharge current In (8/20μs) kA 20 40
Max. Discharge current Imax (8/20μs) kA 40 80
Reserve protection breaker 40A/2P 40A/4P 63A/2P 63A/4P
Protection principle 2P 3P+N 2P 3 P+ N
Response time ns ＜25
Enclosure material Aluminum alloy
Cross-sectional area ≥10mm 2 stranded/ flexible
Starting current ≥400A
Counting range 0-99
Leakage current 75% Uc 1mA ≤20μA
Ordering description
Type Remarks
LZA-20C/2F single phase
LZA-20C/3F three phase
LZA-40B/2F single phase
LZA-40B/3F three phase