SWITCHBOARD
Definition
Panel, a frame single large homemade or panels place seating electric switch, the flow of excess equipment protection, bus, and other instrument, on the surface, behind, or in both.
(National Electrical Code)
The Switchboard can usually be accessed from behind as well as from the front and is not intended to be installed in the Cabinet.
(Section 100- Definitions)
Equipment Contained in The Switchboard
From example, section input or switchboard services and distribution section that provides power to the feeder and branch circuit. Circuit breaker which is seating in this sections provides excess flow protection. Most switchboard using the electrical switch as an alternative switch circuit breaker.
Bus
Implied on the definition, buses, switchboard load that is the trunks of metal seating in the switchboard to conduct power to equipment switchboard.
Instrumentation
Instrumentation often containts one or more meters designed to receive a signal from sensors and other appliaces and display of values that appear for mentoring and management resources. It can be accessed from behind another feature switchboard is can be mounted away from the back wall to provide access switchboard.
Standard Switchboard
The Switchboard is made following the standard set by Underwriters Laboratory (UL 891) dan National Electrical Manufacturers Association (NEMA PB2). The basic requirements for the Switchboard is also included in the National Electrical Code Section 408.
Switchboard Construction
There are a few items that construct a switchboard. Included on the list element is frame, buses, instrument flow protection excessive, meters service, and cover outside.
Frame
The switchboard frame hosts and supports other components. The switchboard frame Siemens is high 90 inches and a width of 32 or 36 inches. High 70 ‘s choice with a width of 32, 38, or 42 inches are available. Switchboard Siemens has a size of depth ranges from 20 to 40 inches.
Bus
The bus is a conductor or set of conductor that serves as mutual connection two or more circuit. NEC article 408.3 stated that trunk buses will be placed in such a way that it is free from physical damage and will be held tightly in place.
Phase NEMA Layout
The bus having a phase required to sequence that really can have layout remains the same phase in each point termination in any switchboard. This is specified by NEMA (National Electrical Manudacturers Association). If the phase sequence is not used, this should be marked NEMA on the switchboard. Except otherwise, marked considered that the bus arranged in the trunks nema. The following Diagram illustrates the layout phase NEMA which is already widely accepted.
The bus was seated in a frame.A horizontal bus used to distribute power to each switchboard section.A vertical bus used to distribute tools to power through the current excess equipment ioads.The bus made of tin or copper aluminum berfinishing berfinishing silver.The bus can berpengenal temperature or density berpengenal arus.Identification arus determine the maximum density per inch quadrat cross-section of latitude the bus.
The Switchboard appear behind described the connection rods vertical and horizontal bus. Vertical bus bars phase looks upside down sususnannya because it is seen from the back, but in accordance with NEMA sequence when viewed from the front.
Konektor bus menjadi koneksi mekanis dan elektris antara batang bus vertikal dengan batang bus horizontal terkait. Konektor dapat terlihat jelas pada bus netral. Cantolan kompresi yang tersedia pada switchboard ini menerima kabel daya masuk yang berukuran sesuai.
Plate Connection
Plate Connection is used to connect the rod to the horizontal bus switchboard sections are connected. To facilitate the distribution when required additional additional sections distribution when needed bus in the drill earlier extended horizontally and to be ready to accept the connection. Flattened against sections just installed. Old and new section connected using plates connection.
Bus translucent
Bus horizontal extended called also bus translucent. Because of the requirements of the load on downstream distribution section is usually less than section service on upper end, translucent bus capacity persisted, or reduced, in line with the decline in the lower weights. Translucent Bus pursed at least a third of the parent ampasitas service entrance. A see-through Bus full capacity, or conical collar, available as an option. Ampasitas bus is not translucent, conical remains constant throughout the switchboard.
| The Excess Flow ProtectionThe Component operator seating on the front side. This is include the excess flow protection, like circuit breaker and interuptor. This requirements seating on the bus using a fastener that is associated with the line tool. |  |
Close Out
Panel cover is mounted on the switchboard so that no part which electrically open to operators.
 |
Front lid called the face die. Panel also used as furnace to look perfect switchboard. |
A label identifying a kind of information prosuk switchboard, catalogue number, and identification voltage and current.
Diagram Images
A simple picture, as a diagram one line, blok, or picture is often used to show circuit which is connected with a system of the distribution of resources.
Source : Ahmad Sumpena
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