busbar lineservo cnc busbar cut

The use characteristics of the busbar joint insulation protection box

Busbar connector insulation protection box: This product is also known as busbar protection box, busbar connector box, insulation box, protective sleeve, busbar insulation cover, connector protection cover, etc., with 1kv, 10kv and 35kv different voltage levels. For our company's first new product in China, after years of research and development, our company has finally developed the first domestic production equipment dedicated to busbar protection boxes and a related set of new production processes. Instantly changed the traditional backward production mode of the busbar protection box, so that the performance, appearance, and quality of the busbar protection box reached the international leading level, and the materials can be produced from polyolefin cross-linked, pvc, eva, pe, etc. including various composite materials Including busbar protection box products. Filling the domestic gap is a major highlight of national industry.

1 busbar bending machine manual. Product use: Mainly use the insulation protection of the busbar connector box at the connection of the live conductor of the electrical equipment, and the high and low voltage switchgear, circuit breaker, busbar connection, and the insulation protection of special parts such as transformer terminals.

2. Features of finished products: Irradiation can not reach the international leading level, and can produce busbar protection box products including polyolefin cross-linking, pvc, eva, pe and other composite materials. Filling the domestic gap is a major highlight of national industry.

1. Product use: Main deformation, no deformation when heated, no shrinkage when heated. The appearance is sharp and angular, the wall thickness is uniform, the size is accurate, the performance is stable, the appearance is smooth and meticulous, to the international advanced level, we can produce busbar protection boxes including polyolefin cross-linked, pvc, eva, pe and other composite materials product. Filling the domestic gap is a major highlight of national industry.

1. Product use: Main advantages such as long service life, can better show the equipment grade, and the overall effect is more obvious. For our company's patented products.

3. Compared with the disadvantages of the traditional busbar connector box protection box product: because the traditional busbar protection box is made by the heat shrinking process, the raw material is limited by the shrinkage ratio and its own elastic strength during preheating shrinkage. May be completely fitted with the mold, so the shape of the busbar box made is not good, the surface is rough, the shape is not in place, the heat will deform and distort, the size is not accurate, the thickness is uneven, the performance is unstable, the service life is short, the quality is poor, the insulation The degree of protection is difficult to reach the standard, and secondly it will affect the overall aesthetic effect of the equipment and reduce the grade of the busbar junction box equipment.

4. The specifications of applicable busbars are 30*3, 40*4, 50*5, 60*6, 80*8, 100*10, 120*12, 150*12, etc. The shape includes I type, straight T type and L type, and cross type. The colors are yellow, green, red, black and other common optional colors.

"T" type (the main bus bar and the branch bus bar are vertically overlapped)

"L" type (the main bus and the supporting bus are lapped at right angles)

"=" type (main bus and parallel bus are connected in parallel)

"+" type (cross-overlap of main bus and branch bus)

copper bus bar machineryautomatic bending machine

Precautions for waterproofing of busbars during installation of dense insulated busbars

 

Busbar waterproof

   Busbars are generally designed to be used indoors. The humidity in the air will not affect the operation of the busbars. However, water in the busbars during use will inevitably cause a reduction in insulation. Long-term operation will cause short circuits and burn the busbars. Therefore, the necessary protection measures should be taken for the installation method that may cause the busway to enter the water. 

For example, when the busway passes through the floor, the floor water accumulation due to various reasons such as production or roof leakage will leak along the busway passing through the floor busbar drawing machine, causing the busway to enter the water and reduce the insulation of the busway. After the bus bar of the acrylic plant polymerization workshop of our factory was put into use, a short-circuit failure caused by the water ingress when the bus bar passed through the floor caused a shutdown accident of the entire production device. The solution is to add waterproof cofferdam when the busway crosses the floor

Even if the bus duct is connected with the expansion joint of the transformer for transition, the current of the main bus as the low-voltage incoming main bus is generally larger, and some have reached 2500A. The corresponding expansion joint has a larger cross-section and less elasticity, which may still cause Transformer low voltage sleeve is stressed. 

Therefore, it is recommended to use the fixing method shown in Figure 3 for the bus bar of the transformer room. Use the channel steel bracket to mount under the bus bar, and use round steel as the hoop to fix the bus bar on the channel steel bracket. Both ends of the channel steel bracket and the embedded parts on both sides of the transformer room are bolted. In this way, the "steel" fixation of the channel steel bracket is fully matched with the "flexible" connection of the expansion joint, and the "steel flexibility" ensures that the low bushing of the transformer will not be damaged by force.

 

cnc busbar equipmenthydrolic busbar machine

Problems in the installation process of dense insulated busbars

The dense insulated bus bar has the advantages of small volume, compact structure, large transmission current, safety, and convenient maintenance. It has been widely used in enterprise low-voltage distribution equipment. However, in the process of construction management, it was found that due to the monotonous product specifications of the manufacturer bus bar shear, the installation and operation manuals being too simple, and the design considerations, etc., it often caused on-site installation difficulties. The following are some issues that should be paid attention to during the installation of the dense insulated busbars from the transformer to the low-voltage distribution cabinet, for reference during construction.

   1.) Connection of bus duct

   Plug-in busbar connection. For the connection of the bus bar, use a high-strength insulation board with high insulation, arc resistance and flame retardancy as the connection accessory, and fasten it with a bolt with an insulation sleeve. According to the requirements of the specification, in order to meet the overlapping area of the busbar, the gap between the bolt hole and the bolt is small. Since the busbar bolt adds an insulating sleeve, the gap is narrower. Therefore, when the main busbars of the two sections of busbars are connected, the axis of the two sections of busbars should be kept strictly on a center line, and the busbars of the two sections of busbars and the bolt holes of the insulating plate should be completely aligned. When the bolts are tightened, each The bolts should be applied evenly in sequence. This purpose is to prevent the insulating sleeve on the bolt from being damaged by shearing force during installation. In the course of engineering construction management, the author found several cases of busbar insulation degradation due to the damage of bolt insulation sleeves. The grounding connection adopts the busbar shell to meet the grounding requirements. However, when all the busbar shells are sprayed, the two sections of busbar grooves must be connected with grounding bolts. The insulation of the bus duct should be checked before and after installation, and compared to check whether the insulation of the bus duct is reduced due to installation quality problems.

  2.) Fixing method of transformer room bus duct

The bus bar provided on the manufacturer's sample is generally hoisted with round steel. This method is not suitable for the fixing of the bus bar in the transformer room. This type of hoisting is "flexible". It can only hold the bus bar to make it It can not move up and down, and when the busbar slot is improperly installed by twisting stress or under the influence of busbar short-circuit electromotive force, the busbar slot may sway to the left or right or up, which will cause damage to the transformer low-voltage bushing connected to the busbar slot Or oil leakage at the rubber seal at the root of the casing.

busbar shearing punching machinebusbar cutting machine

Matching of common copper busbar section and rated working current in low-voltage switchgear

              According to the maximum allowable temperature of the busbar 700C (the busbar selection is subject to 500C data)

When the actual ambient temperature is 400C
Busbar sectionmm2	Maximum allowable current A
	Lay flat	Vertical
automatic cutting machines.0000pt solid windowtext;"> 15×3	162	171
20×3	214	225
25×3	271	285
30×4	366	385
40×4	484	510
40×5	551	580
50×5	669	705
50×6	735	775
60×6	873	920
60×8	1016	1070
60×10	1133	1195
80×6	1110	1205
80×8	1260	1370
80×10	1417	1540
100×6	1356	1475
100×8	1546	1685
100×10	1720	1870
120×8	1800	1955
120×10	1996	2170
2（60×6）	1340	1410
2（60×8）	1660	1750
2（60×10）	1985	2090
2（80×6）	1580	1720
2（80×8）	1950	2120
2（80×10）	2345	2550
2（100×6）	1855	2015
2（100×8）	2290	2490
2（100×10）	2735	2710
2（120×8）	2550	2770
2（120×10）	3090	3360
3（60×6）	1670	1815
3（60×8）	2080	2260
3（60×10）	2560	2690
3（80×6）	2040	2215
3（80×8）	2530	2750
3（80×10）	2990	3250
3（100×6）	2370	2580
3（100×8）	2945	3200
3（100×10）	3450	3750
3（120×8）	3260	3540
3（120×10）	3920	4260
4（100×10）	4000	4350
4（120×10）	4450	4840

 

 

hydrafore busbar benderbus bar line

The matching of the common cable cross-section and rated working current in the pressure switch cabinet:

                                                              

Ambient temperature    AmpacityA sectionmm2	40 0C	55 0C	60 0C	65 0C	70 0C	75 0C
1.5	21			--	--	10
2.5	28			--	--	14
4	37			--	23	--
6	48	43	40	34	30	--
10	65	59	54	49	42	--
16	91	82	76	68	busbar processing machine hs code.0000pt solid windowtext;"> 58	--
25	120	108	100	90	77	--
35	148	133	123	111	95	--
50	187	168	155	140	120	--
70	231	208	192	173	148	--
95	283	255	235	212	181	--
120	326	293	271	237	209	--

 

 

Note: 1. The cable cross section can be selected according to 1.1~1.2 times of the calculated current.

2. The cable cross section can also be selected according to the minimum setting current of electrical components in the loop.

3. The temperature in the drawer is generally: 55~65 0C.

4. The wires in the drawer of the IP54 cabinet are selected according to the environment where the cable works at 70°C.