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  2. List of IEC standards - Wikipedia

    en.wikipedia.org/wiki/List_of_IEC_standards

    IEC 61636 Software interface for Maintenance Information Collection and Analysis (SIMICA) IEC TR 61641 Enclosed low-voltage switchgear and controlgear assemblies – Guide for testing under conditions of arcing due to internal fault; IEC 61642 Industrial a.c. networks affected by harmonics – Application of filters and shunt capacitors

  3. Switchgear - Wikipedia

    en.wikipedia.org/wiki/Switchgear

    Tram switchgear This circuit breaker uses both SF 6 and air as insulation. In an electric power system, a switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults ...

  4. Electrical room - Wikipedia

    en.wikipedia.org/wiki/Electrical_room

    The construction features of an electrical room vary depending on the scope of the equipment to be installed. Floors may be reinforced to support heavy transformers and switchgear. Walls and ceilings may have to support a heavy cable tray system or busbars. Additional ventilation or air conditioning may be needed, since electrical apparatus ...

  5. Utilization categories - Wikipedia

    en.wikipedia.org/wiki/Utilization_categories

    The utilization categories category for low-voltage switchgear defines the characteristic operating conditions for switchgear such as contactors, circuit-breakers, circuit-breaker-fuse units, contactor relays, etc. These devices are dimensioned for different electrical loads and for different operating conditions.

  6. High-voltage switchgear - Wikipedia

    en.wikipedia.org/wiki/High-voltage_switchgear

    750 kV high-voltage switchgear. High-voltage switchgear is any switchgear used to connect or disconnect a part of a high-voltage power system.This equipment is essential for the protection and safe operation, without interruption, of a high voltage power system, and is important because it is directly linked to the quality of the electricity supply.

  7. Motor control center - Wikipedia

    en.wikipedia.org/wiki/Motor_control_center

    Motor control centers are usually used for low voltage three-phase alternating current motors from 208 V to 600 V. Medium-voltage motor control centers are made for large motors running at 2300 V to around 15000 V, using vacuum contactors for switching and with separate compartments for power switching and control.

  8. USAID employees around the world will be placed on leave ...

    www.aol.com/more-usaid-officials-being-put...

    US Agency for International Development staff around the world will be placed on administrative leave Friday and ordered to return to the US, according to a directive issued Tuesday night.

  9. Interlock (engineering) - Wikipedia

    en.wikipedia.org/wiki/Interlock_(engineering)

    Trapped key interlock switchgear door. An interlock is a feature that makes the state of two mechanisms or functions mutually dependent. It may consist of any electrical or mechanical devices, or systems. In most applications, an interlock is used to help prevent any damage to the machine or to the operator handling the machine.

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