Estimation of shell size for distribution box quotation

The quotation for the distribution box was originally an easy task, but the cabinet gave a lot of problems to the quoting personnel who just started the introduction. There are many types of distribution boxes, which can be said to be non-standard cabinets in the standard. So what should we pay attention to for the cabinet?

First of all, the material of the distribution box, wall mounted, dark turn, hanging or floor type, as well as some special purposes, such as outdoor, fire, mining and other design drawings have instructions, understand these we know this What is this box, the size estimation is simple. The size of the distribution box is determined by the dimensions of the electrical components, the safety distance, and the wiring distance.

The following is a standard control box: a main switch CM1-100 molded case, which controls 4 branch switches CM1-63 molded case, and each circuit adds AC heat.

Such a control box, we know that there are 1 component 100 plastic case, 4 63 plastic case, 4 AC, 4 hot 継, plus a number of signal button, insurance, terminal block, zero floor, Basically it's all.

The order of components is as follows: one of the above main switch 100-shaped molded case, reserved for the line position, followed by four 63-shaped molded cases, reserved for the position of the line, below is 4 AC 4 hot 継 (hot 継 without base) In the case of 100mm in the middle, the wiring position is reserved. The secondary terminals are placed on the side of the door. The general control box is the left door. (The industry is used to lock the door to the left, which means left open, left hand, and vice versa. The terminal is placed on the left, zero. The components are discharged on the right side of the main switch (or on the bottom side).

The reserved switch position on the main switch is based on easy wiring (general flying fox distance is less than the suitable wiring distance). For 100A, the wire about 25 square meters is reserved for about 150mm (Note: the field wiring is mainly based on the national standard wiring nose, wiring nose The head is longer than the normal wiring nose. The CM1-100 molded case has a size of 92*150*86mm (M type).

If the branch switch is molded, the distance between the main switch and the main switch should be considered. If the wire is 150mm, connect with the copper bar, 200mm, increase the distance according to the current; CM1-63M size 78*135*81.5mm, AC and molded case Reserve 100mm between, 32-type AC and hot 継 combined height is not more than 150mm to 150mm, if you do not have a base, then 250mm, the bottom outlet position is 150mm (200mm if the ground is discharged below).

Then we get the height of the distribution box:

150 line position +150 main switch +150 wiring position +135 outlet line open +100 wiring position +150 AC hot 継 +150 outlet position = 985mm.

The width is the widest position calculation, that is, four 63-shaped molded cases, the terminals are placed in the space of the left side of the total empty space, and the distance between the four molded cases 81.5*4+ molded case is 10*(4)+ The estimated distance between the bottom plate and the side wall of the distribution box is 50*2, namely:

326 outlet switch width and +40 open clearance +100 clearance on both sides = 466mm;

Depth main switch (AC may be slightly higher) 78+ base plate estimation 30mm + panel signal lamp wiring distance 100mm is:
 
78+30+100=208mm or 200mm.

According to the above estimation (the position of the zero ground row can be ignored), the size of the distribution box is 1000* wide and 500* deep 200, so that a box size comes out.