High voltage common box bus duct

High-voltage common box busbar (high-voltage common box bus duct) is a device used for power transmission and distribution in power systems.It is usually made of conductive material such as copper or Aluminum has good electrical conductivity properties.The common box busbar consists of multiple conductors arranged in parallel, which are fixed and connected by supporting and insulating structures isolation.

product details

Scope Of Application

The busbar casing is made of track-type aluminum alloy profiles, which is simple and quick to assemble and beautiful in appearance.

All current level bus ducts use the same specification shell, the connections use standard connection terminals, and the common phase closed bus bar has good versatility.

Use insulating parts to support and separate insulating wires to ensure safe and reliable electricity use.

Using universal two-hole and three-hole sockets, it is convenient and fast to draw out branch power.

The outlet setup facilitates three-phase load balancing.

Various on-site installation methods are provided, and users can use them flexibly according to their needs.

High-voltage common box busbars are mainly used to transport large currents from substations to different load points, such as industrial plants or distributed substations in cities.It can withstand higher electricity current load and has lower resistive losses.The common box busbar also has smaller inductance and capacitance characteristics, which can reduce power losses in the power system and improve energy transmission.

Transmission Efficiency

Structural Features

This series of bus ducts has an advanced structure. The installation and maintenance holes can be arbitrarily located on the upper or lower part of the bus duct. For large current indoor bus ducts, the eaves are placed on both sides of the casing.

And the lower part is equipped with ventilation shutters to enhance heat loss and reduce temperature rise.

The use of double insulation and multi-point grounding connection significantly reduces maintenance work and significantly improves safety performance.

It adopts bellows expansion joint, which is easy to install and can realize two degrees of freedom adjustment in horizontal and vertical directions. It can not only meet the expansion and contraction requirements caused by different temperature drops and thermal expansion and contraction.

It can also compensate for errors caused by foundation settlement, solving the shortcomings of traditional slide-type telescopic devices with poor protection levels, troublesome installation, and unreliable operation.

The Main Technical Parameters

Serial number	Functional unit	Standard length(m)	serial number	functional unit	Standard length(m)
1	Straight line	1.5or2	4	expansion joint	1
2	Horizontal 90 degree elbow	0.5+0.5	5	buffer section	0.5
3	Vertical 90 degree elbow	0.5+0.56	6	commutation festival	2

Working rated current 250A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A, 5000A, 6300A.

Working frequency 50~60Hz, three-phase three-wire.

Rated working voltage, maximum working voltage, rated power frequency withstand voltage (1min), rated (lightning) impulse withstand voltage. (see table below).

Rated voltage (Kv)	Maximum working voltage (KV)		insulation level
			Rated power frequency withstand voltage (1min)	Rated (lightning) impulse withstand voltage (KV)
			Wet test (KV)	Dry test (KV)
3.15	3.6	18	25	40
6.3	7.2	23	32	60
10.5	12	30	42	75
20	24	50	68	125
35	40.5	80	100	185

When the busbar system is operated with rated current for a long period of time, the temperature and temperature rise are allowed (when the ambient temperature is 40°C). (see table below right)

	Maximum allowable temperature ℃	Maximum allowable temperature rise K
Conductor	90	50
Silver plated connector	105	65
Shell	70	30

Rated voltage (KV))	3.15	6.3	10.5	35
Rated current(A)		Overall dimensions (WXH) (mm)
1000	1:850×350	1:1060×460	l:1060×460	1:1600×800
1000	I:750×400	ⅡI:900x560	11:900×560	Ⅱ:1500×920
1600	1:850×350	I:1060×460	l:1060x460	1:1600×800
1600	11:750×400	Ⅱ1:900×560	11:900×560	Ⅱ:1500×920
2000	1:850×350	I:1060×460	l:1060×460	:1600x800
2000	I:750×400	Ⅱ:900×560	11:900×560	II:1500 x920
2500	1:850×350	I:1060×460	l:1060×460	I:1600x800
2500	11:750×400	ⅡI:900×560	11:900×560	II:1500x920
3000	1:850×350	I:1060×460	l:1060×460	I:1600×800
3000	II:750x400	ⅡI:900×560	11:900×560	Ⅱ:1500×920
3500	1:850x480	I:1060×460	l:1060×460
3500	Ⅱ1:750×440	ⅡI:900×560	I1:900×560
4000	1:850x480	I:1060x460	1:900x560
	Ⅱ:750 x440	Ⅱ1:900x560	II:1060x440
	※:850×440	※:1060x440	※:1060×460
4500	1:750x440	l:1000x560	l:1000x560
4500	※:980×480	※:1180×480	※:1180×480
5000	I:1350×500	I:1500x600	l:1500x600
5000	※:1040×500	※:1240x500	※:1240×500
6300	I:1350x500	1:1500×600	I:1500x600

I:The beginning of I: indicates that the conductor busbar of the busbar is laid flat;

II: The beginning indicates that the busbar conductor busbar is placed vertically;

※: The one at the beginning is a fully insulated common box closed busbar.