Higher ratings through energy-efficient cooling SIVACON S8 – cubicle in circuit-breaker design and in universal mounting design with forced cooling Safe and reliable power distribution Low-voltage switchboards are subject to continuously increasing technical requirements with high demands for personnel and operational safety. This is manifested by a further increase in packing density associated with a high degree of protection for the switchboard and a high form of internal s eparation. The rated currents in the switchboard increase. As a consequence, the higher operational power loss results in a higher development of heat where more power is required in confined spaces, for example, in i ncoming feeder cubicles and in the compact withdrawable design. The higher temperature rise leads to a derating at the installed components and can have an influence on the s ervice life of sensitive electronic d evices. Relief is provided by different measures such as enlarged busbar cross-sections. To improve the heat dissipation and cooling, cubicle dimensions can be i ncreased or the degree of protection and the form of internal separation r educed as an alternative. However, these measures no longer satisfy the current demands placed on low-voltage switchboards, which means that higher ratings of the d evices must be enabled by means of energy-efficient cooling. The reliable way to more cost-efficiency With the feature package SIVACON S8plus, Siemens offers the possibility to equip cubicles of the S IVACON S8 low-voltage switchboard in circuit-breaker design and in uni versal mounting design with forced cooling. The targeted use of fans will considerably reduce the device derating caused by operational power loss. This allows to increase the rated c urrent without costly expansions or enlargements of the switchboards. C ubicle properties such as a high d egree of protection and a high form of internal separation are not restricted thereby. Your benefit • Cubicle in circuit-breaker design and in universal mounting design with i ncreased rated current due to forced cooling • Reduced derating of integrated components • High operational safety thanks to controlled and monitored cooling system with redundant fans • Safety for personnel and switchboard by means of tests according to IEC 61439-2 • High personnel and switchboard safety in case of arcing by means of tests under conditions of arcing according to IE

Innovative solution SIVACON S8 offers a patented forced cooling technology for cubicles in circuit-breaker design and in universal mounting design. The system was designed and optimised by Computational Fluid Dynamics (CFD) simulation, and was confirmed by numerous design verifications according to IEC 61439-2. It reduces the derating and provides a low temperature profile inside a cubicle to ensure safe and long life operation of sensitive electronic equipment. The control system monitors the temperature at critical spots, ensuring energy-efficient cooling at any time. To increase the service...

Heat sink Circuit breaker Forced cooling for circuit-breaker design Your advantages Reduction in derating As a result of forced cooling with fans, the rated current of cubicles in c ircuit-breaker design and in universal mounting design can be increased. This is possible without additional costs for larger busbar cross-sections or a circuit breaker with a larger type of construction in the cubicle in circuit- breaker design. Further demands placed on the switchboard such as a high degree of protection or a high form of internal separation are not r estricted by the forced cooling. The low temperature...

High personnel and switchboard safety Requirement of the IEC 61439 standard Low-voltage switchboards, defined in the standard as “power switchgear and controlgear assemblies”, are developed, manufactured, and tested following the specifications of IEC 61439-2. In order to provide evidence that the switchboard is fit for purpose, this standard requires two main forms of verification – design verifications and routine verifications: • Design verifications are tests carried out during the development process and are the responsibility of the original manufacturer (developer). • Routine verifications...