SCB ( Surge Protector Circuit Breaker )-SSD ( SPD Specific Disconnector)

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In low voltage power systems, a surge protector circuit breaker (SCB)-SSD ( SPD Specific Disconnecotor) is an external disconnector used in series with a surge protector (SPD). Surge protector circuit breakers are suitable for AC 50/60hz, 15/20 amp, 230v-400v range of TT, TN, and other power supply systems. The power frequency action current of the SCB breakers is less than 3A, (8/20s impulse current can pass through 120kA). All the performance indexes of products exceed miniature surge arrester circuit breakers and fuses, making them the best choice for SPD backup protection. The SCB (SSD) is connected in series on the SPD circuit and has the ability to resist high surges. The T1 level can reach up to 25KA (10/350μs), and the residual voltage is low. The surge protector main breaker can intelligently identify lightning current and power frequency current. When the power distribution system fails, it can trip quickly within 0.1S to protect the SPD from fire.

Features Of Surge Protector Circuit Breaker-SSD ( SPD Specific Disconnector)
The SCB (surge protector circuit breaker)-SSD ( SPD Specific Disconnecotor) is specially designed for SPD according to the requirements of GB18802.1/IEC, to solve the problem that when the SPD has power frequency leakage current or working frequency follow current due to deterioration or power frequency overvoltage, The SCB acts quickly to disconnect the SPD from the power frequency distribution system but does not act when the SPD discharges the lightning electromagnetic pulse current; SCB breakers effectively solves the possibility of serious accidents such as burning and explosion in the application of the SPD, At the same time, it effectively solves the problem of protection dead zone when using a fuse or a spd circuit breaker as an external disconnecting device. In low-voltage power distribution systems, it is an ideal companion device for voltage-switching SPDs and voltage-limiting SPDs.

2. With a special design, it can accurately distinguish and identify the power frequency current and the lightning electromagnetic pulse current, and automatically make the correct action.

3. It has the functions of large current flow, low residual voltage, small power frequency tripping current, and short circuit protection tripping.

Note: It is forbidden to connect other loads at the end of the SCB.

Specification Of Surge Protector Circuit Breaker-SSD ( SPD Specific Disconnector)

Models TD-HA 15 TD-HA25 TD-HA50 TD-HB 20 TD-HB 40 TD-HB 60 TD-HB 80 TD-HB 100 TD-HB 120
Test Standard T1 T2
Normal Voltage 230/400V AC
Nominal discharge current（8/20μs）In 10 20 30 40 50 60
Maximum discharge current（8/20μs）Imax 20kA 40kA 60kA 80kA 100kA 120kA
Maximum discharge current（10/3500μs）Iimp 15KA 25KA 50KA
Frequency 50/60Hz
Rated short-circuit current capability Icn 100kA 100kA 100kA 15kA 30kA 50kA 50kA 100kA 100kA
Matched SPD Iimp
15kA Iimp
25kA Iimp
50kA Imax
20kA Imax
40kA Imax
60kA Imax 80kA Imax
100kA Imax
120kA
Powerfrequency short circuit operating current Id 3A
Powerfrequency breaking times Tcn 0.1s
Product width dimension 18cm 36cm 18cm 36cm
Power frequency breaking times 1000 times
IP Grade IP20
Remote Control Option
Working Temperature 25～＋75℃
Number of pole 1P/2P/3P/4P

Shenzhen Techwin Lighting Technologies Co., Ltd is a professional lightning protector supplier, we provide solar power surge protector, power surge circuit breaker, lightning surge protector, coaxial surge protector and etc. Want to know more? Please contact us.

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