When installing several AB within the cabinet often have to combine their like terminals on the standard template. Traditionally used for this improvised bridge, made of pieces of copper wire. If you do them all the rules - will be able to get quite a good contact. And yet, this method has disadvantages, which will help get rid of special combs designed in the form of solid copper bars.
What is the rake?
Unlike improvised webs forming the double contact unreliable when connected to terminal AB, branded comb does not have this drawback. It is made as a solid copper plate with an insulator retardant plastic. Moving away from its base single pins or teeth, and deprived of insulation designed to form a reliable contact between the terminals adjacent automata (pictured below).
Form them is L-shaped or U- shaped, and the plate itself, if desired, can be removed from the plastic.
Considered products are available in the following versions:
- Single-pole (or single).
- 3 and 4 pole.
Note: The last one is used very rarely (if necessary, switching three phases and zero simultaneously).
Each of these versions should be considered separately.
A first embodiment - is a simple single plate with teeth arranged on the base with a certain pitch. Pole execution represented more complex product, containing two copper isolated one from the other plate with twice the distance between the pins (pictured below).
The pins of one plate are molded so that they are arranged in a line with other teeth. A modified pitch between contacts 2 pole jumper due to the fact that they are designed to be coupled with a combination of AV devices terminals L + N or L1 + L2. That is why the teeth in such a connector are located in one.
Branded comb with three or four poles are used in rare cases:
- When it is desired to connect like terminals coupled L1 + L2 + L3 (when three-phase podvodke).
- If necessary, the joint 4 of the contact groups (three phases, supplemented zero bus N). An example of such a comb is represented pictured below.
Known types of connection bars also differ in the number and shape of the teeth.
According to the second feature, they can have the following performance:
- In a single pin (PIN).
- In the form of a fork (FORK).
According to the number of teeth in each of their lines they are divided into products 12, 24, 36, 48 or 60 tap-pins arranged on a plate with a pitch of about 1.8 centimeters.
how to connect
As will be discussed the procedure of Example association interdigitated comb PIN four adjacent identical AB.
It will have to do the following:
- First, using the pliers of the plastic housing gets copper bus and is measured by the length of all 4 devices.
- Then, an unnecessary portion is cut hacksaw (leaving only the length of the length of machine).
Important!The plastic part is cut with a small margin, allows you to securely isolate the bus bar.
Next, the working length of the comb back to the place (in the protective body of plastic), and then inserted with their pins in machines and securely tightened at several points.
In the presence of AB with auxiliary contacts, allowing the use of a comb with pins FORK, the order of connection is even easier. First, the preform is cut to the desired length, and then simply inserted into the groove and tightened with a screwdriver intended for it.