The circuit configurations for high and medium voltage switchgear installations are governed by operational considerations. The entire range of havells industrial switchgear include switches circuit breakers and conventional devices that are designed and manufactured according to world class standards.
Low Voltage One Line Abb Us Electrification
Switchgear circuit diagram. The apparatus used for switching controlling and protecting the electrical circuits and equipment is known as switchgear. The switchgear assembly is secured on a true and level surface. In an electric power system switchgear is composed of electrical disconnect switches fuses or circuit breakers used to control protect and isolate electrical equipment. A typical diagram of low voltage switchgear is shown above. Two sub incomers are connected to the incomer bus and these sub incomers are protected by means of either switch fuse unit or air circuit breaker. Havells manufactures world class industrial switchgear that offers close protection of devices such as motors against overload single phasing etc.
Switchgear is commonly found throughout electric utility transmission and distribution systems as well as in medium to large sized commercial or industrial facilities. Applying these portable ground cables requires a safe disconnection of power in the zone to be grounded to ensure personnel safety. The apparatus used for controlling regulating and switching on or off the electrical circuit in the electrical power system is known as switchgearthe switches fuses circuit breaker isolator relays current and potential transformer indicating instrument lightning arresters and control panels are examples of the switchgear devices. Dc switches the merz dc switches have been specifically developed as dc load break disconnectors. Repair maintenance switches encapsulated switches designed to be used as main or emergency stop switches suitable for indoor and outdoor applications. Cam switches the merz cam switches are freely.
Caution before energizing the switchgear assembly ensure that. By opening the breaker or short circuit the secondary of the current transformer. Here the main incomer comes from lv side of an electrical transformerthis incomer through an electrical isolator as well as an mccb not shown in the figure feeds the incomer bus. The term switchgear is a generic term that includes a wide range of switching devices like circuit breakers switches switch fuse units off load isolators hrc fuses contactors miniature circuit breakers elcbs gfcis. This type of equipment is directly linked to the reliability of the electricity supply. Whether single or multiple busbars are necessary will depend mainly on how the system is operated and on the need for sectionalizing to avoid excessive breaking capacities.
Compact switches the merz compact switches as onoff switches in open and encapsulated designs. The user is responsible for conforming to all applicable code requirements with respect to grounding the switchgear assembly. A collection of one or more of these structures is called a switchgear line up or assembly. Switchgear is used both to de energize equipment to allow work to be done and to clear faults downstream. The circuit protection devices are mounted in metal structures. As shown on the single line diagram there are ground studs on the incoming and outgoing sides of both the usg 1a 138 kv and psg 1a 416 kv switchgear.
Gallery of Switchgear Circuit Diagram
