CHT1-SCB40KA Surge Backup Protector

The SPD backup protector is connected in series to the SPD circuit, and uses the internal current sorting channel device to achieve fast disconnection of power frequency small current and non-tripping of large current lightning impact, achieving the function of power frequency small current SPD fire protection and lightning impact SPD continuous protection. SCB products are only used for SPD circuit overcurrent protection or backup current protection, and do not use in other occasions.

• Parameter-controlled tripping mechanism, selectively disconnecting lightning current and power frequency current
• High-energy contacts, long service life
• Micro-break appearance, small size, convenient for power-off detection of SPD
• Full specifications, meeting the requirements of T1, T2, T3 level SPD
• 35MM rail installation, meeting installation requirements around the world
• Low residual pressure of impact current, equivalent fuse

According to IEC61643-4-43, Article 430.3, "Before a circuit becomes dangerous, appropriate,Overcurrent protection device" ensures that the surge protector does not catch fire and the equipment lightning protection continues to be effective.over current protection device" ensures that the surge protector does not catch fire and equipment lightning protection continues to beef Fe Ctive.

1.When the surge (SPD) deteriorates and an abnormal overvoltage occurs in the distribution line, the surge (SPD) will be short-circuited to the ground. The fuse and circuit breaker cannot be disconnected quickly at this time, and the surge (SPD) will quickly catch fire and burn. The critical point of SPD ignition is 5A.

2.When lightning strikes, fuses and circuit breakers are power distribution components that cannot carry the instantaneous energy of lightning current, causing the components to explode and trip, causing the equipment to lose lightning protection and be damaged.

3.The short-circuit breaking capacity (ICS) of fuses and circuit breakers is insufficient (6-15KA), which causes the SPD to be unable to break after a short circuit occurs, and the arc continues to burn, causing a major fire accident.

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