The backup protection circuit breaker is mainly used for backup short-circuit protection of surge protectors in 230/400V power distribution systems. The product is equipped with a power frequency current and a lightning current dual-pass circuit, which can realize the rapid breaking of the power frequency small current, and the lightning current impact does not trip, achieving the fire protection of the power frequency small current surge protector, and the lightning current impact surge protector continues to work The role of. The product complies with the standard GB 18802.1/IEC61643-11, GB10963, NB/T 31040-2012.

Features：

1. Parameter control trip mechanism to realize selective breaking of passing current;

2. The inrush current residual voltage is low, comparable to the fuse;

3. High-energy contacts, long service life

4. Micro-off appearance, considerate and small, convenient to detect SPD after power off

5. Complete specifications to meet the requirements of T1T2T3 SPD

6. 35mm rail installation, in line with installation needs all over the world

Product Usage：

1. It realizes selective breaking of the passing power frequency current and lightning current, which can effectively protect the SPD from melting and short-circuiting of the PSD due to abnormal transient over-voltage, causing serious fire accidents.

2. Selective breaking of the passing power frequency current and lightning current can effectively protect the SPD from degrading, causing the SPD start voltage to drop below the power supply voltage, and the power frequency leakage current increases, causing serious fire accidents

3. When the SPD has lightning current, the external disconnector will not trip by mistake, so that the lightning protection of electrical equipment is always in an effective state.

Scope of application：

The dedicated backup protector for Lefedi provides professional backup protection for the power supply with the first, second, and third level equipment protection (lightning protector). It is suitable for places where SPD lightning protection equipment has been installed, such as power equipment for industrial and civil construction, electrical, communications, road traffic, petrochemical and other industries.