Product Description

SCB special external disconnector (backup protector: SCB) is a special device designed and manufactured according to the requirements of Article 430.3 of EC61643-4-43, "Before the circuit causes danger, a suitable overcurrent protection device should be used". It mainly solves the problem of local problems. The safety problem of SCB tripping quickly when dangerous power frequency freewheeling or dangerous power frequency leakage current occurs, but not accidentally tripping when lightning current passes through, ensures that SCB does not rise and equipment lightning protection continues to be effective, solving the current widespread use of fuses or The circuit breaker used as an external disconnector has the problem of blind zone protection. It is an ideal supporting device for voltage switching SCB and voltage limiting SCB in low-voltage power supply systems.

Features

Large lightning surge current (25kA 10/350us, 100kA 8/20us) is not interrupted to ensure effective SCB lightning protection;

SCB fault power frequency freewheeling breaking value is lower than 3A to 1A to ensure the safety of the power grid and power consumption;

The lightning impact residual voltage is low, which increases the reliability of equipment lightning protection.

Product design and ordering instructions

When designing and ordering products, users should specify the product series, color, model, series, voltage, and quantity in detail. For example: SCB series full line SCB-4P40KA T2 20 units.

The main technical parameters

Dimensional drawing