Switchgear describes a complete set of power circulation tools set up from primary tools and secondary devices according to a certain circuit strategy. It is used to control as well as shield circuits and tools. The framework of the switchgear is roughly comparable, mostly separated right into busbar area, breaker area, second control room (tool space), feeder room, each area is usually divided by steel plates.
low-voltage withdrawable switchgear
1. Understanding of distribution box (closet).
GCK, GCS, MNS are low-voltage withdrawable switchgear; GGD, GDH, PGL are low-voltage dealt with switchgear; XZW is a comprehensive distribution box; ZBW is a box-type substation; XL, GXL are low-voltage power circulation cabinets and building and construction website boxes; JXF is an electrical control box; PZ20 and also PZ30 series are incurable lighting circulation boxes; PZ40 and also XDD( R) are electric meter measurement boxes.
2. The effect of low-voltage power circulation cabinets.
( 1) It is convenient to set up the power supply fairly.
( 2) When the line fails, it is beneficial to manage the scope of the fault and it is convenient to rapidly find the mistake point and also remove it in time.
( 3) It is convenient to prepare circuit inspection and repair in pieces, without large power blackout.
( 4) Various security tools such as merges to avoid brief circuits and also air switches to avoid overload can be easily put in the power circulation cabinet.
3. The make-up of the low-voltage power distribution cupboard.
( 1) The power circulation cupboard mostly includes: circuitry terminals, numerous switches, protection tools (air switches, fuses, and so on), measuring equipment (voltmeter, ammeter, cycle meter, etc.), gauging equipment (active and reactive power) table).
( 2) There are several kinds of low-voltage power distribution cabinets, as well as the components are very different. Taking the power closet as an example, from leading to base: blade switch, present transformer, air switch, as well as branch circuit breakers.
TControl power distribution closet.
4. The content of each digit of the power distribution closet version.
GGD low-voltage acid pretreatment of steel power distribution cupboard: G-- low-voltage power circulation closet; G-- fixed installation as well as circuitry; D-- power cupboard;.
GCK low-voltage power circulation cabinet: G-- cupboard framework; C-- withdrawable kind; K-- control center;.
GCS low-voltage power distribution cabinet: G-- enclosed button closet; C-- withdrawable kind; S-- Senyuan electric system;.
MNS low-voltage power distribution cabinet is an item produced according to the transfer technology of Swiss ABB business.
5. The distinction between GGD, GCS, GCK, MNS power circulation cupboard.
GGD is various from the other 3 in that it is a fixed type, while GCK, GCS, and also MNS are all cabinet type button closets. Each outlet device of them is independent as well as each circuit will not impact each various other.
GCS is a new generation of cabinet type button cupboard developed by Senyuan Company in the mid-90s with referral to ABB's MNS cupboard type. The primary structure is similar to MNS, with the main bus bar behind. The distinction from MNS is that the cabinet module makes use of a 20mm component (MNS is 25mm); the drawer embraces a press mechanism, which makes the procedure easier and also flexible.
The MNS cupboard can be operated both sides, and also a single closet can hold 36 loopholes (with 1/4 cabinets) at a lot of, while the GCS can be approximately 22. The material made use of in the MNS cabinet is aluminum-zinc layered, totally constructed structure, no post-processing (galvanizing) is called for.
The straight busbars of MNS as well as GCS are divided from the front left drawer device and also the front right cable electrical outlet compartment with partitions. Their upright busbars are assembled in flame-retardant plastic practical boards to be much more trusted. The distinction is that GCS can only have 1/2 drawer a minimum of, MNS has 1/4 drawer, MNS drawer has another interlacing system, and GCS only has the switch itself.