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The performance of automatic circuit breakers used by telecommunications operators in Direct Current (DC) power transmission systems is currently regulated by IEC/EN/UL standards. Though the standards rigorously cover safety and performance requirements, tested and approved breakers failing under real operating conditions are not a rare occurrence, and sometimes lead to entire network shutdowns.

Breaker failures mostly happen when contact points weld together, thereby blocking electricity transmission. This is mainly caused by resistances, inductivity, limited network, and system capacity or a missing polarity exchange in the DC power.

New Testing System at CQE

The SGS Center for Quality Engineering (CQE) recently acquired new testing equipment that not only enables the testing of breakers against existing standards, but also allows for a larger palette of measurements, enabling customers to test breakers under the exact operating conditions under which they will be later employed.

CQE’s new testing system can operate at either 48 VDC (Volts Direct Current) or 60 VDC, and is able to provide non-staged short circuit currents of up to 10,000 amperes. The new equipment further enables CQE to perform overload tests in accordance with UL 1977 for connectors, data, signal, and performance applications, as per requirements you may receive from third-party testing organizations.

For more information on SGS CQE’s Breaker Testing Services, please contact:

Christian Waldenburg
Product Safety Manager

SGS Germany GmbH
t: +49 89 787475 420

About SGS

The SGS Group is the global leader and innovator in inspection, verification, testing and certification services. Founded in 1878, SGS is recognized as the global benchmark in quality and integrity. With more than 56,000 employees, SGS operates a network of over 1,000 offices and laboratories around the world.