| 3WT Air Circuit Breakers | |
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3WT Air Circuit-Breakers up to 3200 A (AC) |
■Benefits Safety and reliability •High degree of protection with door sealing frame in the case of exclusively local operation of the circuit-breaker • Incoming supply from above or below, as required • Locking of the withdrawable circuit-breaker against moving, as standard • Locking of the guide frame with the circuit-breaker removed, as standard • Signaling switch for overload and short-circuit tripping with mechanical closing lockout Easy to operate •Unambiguous ON-OFF indicator with auxiliary switch for signal • Ready-to-close indicator with signaling switch as safety standard. Modular Many components, such as auxiliary releases, motorized operating mechanisms, electronic trip units and current transformers can be replaced or retrofitted to adapt the circuit-breaker to changing requirements. Minimal power loss and therefore low energy consumption The low power consumption of the electrical components also saves money when it comes to purchasing the control-power transformers. Where space is at a premium or ventilation is limited. ■Application Specifications IEC 60947-2, VDE 0660 Part 101, GB 14048.2, CCC Approval, climate-proof to IEC 60068-2-30, Approval according to maritime classification on request. Operating conditions The 3WT circuit-breakers are climate-proof in accordance with IEC 60068-2-30. They are intended for use in enclosed areas where no severe operating conditions (e.g. dust, corrosive vapors, damaging gases) are present. When installed in dusty or damp areas, suitable enclosures must be provided. If damaging gases (e.g. hydrogen sulfide) are present in the surrounding air, sufficient incoming fresh air must be supplied. The permissible ambient temperatures and the associated rated currents are listed in the technical specifications. |
