Siemens DTU3005-B Especificaciones descargar pdf (Pagina 3)

General Information

NOTE: For more information on other standard and optional

trip unit features, see Siemens Electronic Trip Units for SB

Encased Systems Breakers Information and Instruction Guide

Bulletin IPIM-2203B and the Sentron Systems Breaker Energy

Communicating Trip Unit Information and Instruction Guide

Bulletin IPIM-2208A.

The SB breakers incorporate several installation, operation and

safety features.

Insulated - Encased Construction

The SB breaker’s housing, internal barrier, and front cover are

molded froma thermoset material witha high-dielectric strength

(electrical insulation). The one piece molded case (base and hous-

ing) provides enhanced structural integrity. A midbarrier provides

outer wall reinforcement, integral arc baffling, and insulation/

isolation between the two compartments of the circuit breaker.

This patented construction provides a higher interrupting capacity

within a smaller housing than can be achieved by more conven-

tional construction. The electrical insulation property of the

thermoset material enhances operational safety. The insulated

case physically isolates and electrically insulates users from the

internal high voltage contacts.

The arc chambers and main contact structure are encased in the

back compartment. The trip unit, controls, springs of the stored

energy mechanism, and optional internal accessories are located

in the front compartment. Access to the front compartment is

by the removable front cover. Since the barrier between the two

compartments is made from the same insulating thermoset mate-

rial as the housing, the user is physically isolated and electrically

isolated from the main breaker mechanism and contacts when

the front cover is removed.

Photos of 2000A Frame Shown for Illustration Purposes Only

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Siemens DTU3005-B Especificaciones Pagina 3