How to control the poor contact of the binding post?

If your one of the binding posts is not in good contact, the best control method is to choose this one of it, replace it accordingly, and this one binding post will do.

Because the ammeter is connected in series in the circuit, the current is as large as the current of the electrical appliance, and the poor contact of the terminal post will lead to heating, burning the binding post, and even burning the ammeter, and when it is heated, it will lead to a large contact resistance, resulting in a voltage drop, resulting in the use of electrical appliances due to insufficient voltage and burning.

If this kind of poor contact occurs, be sure to find some electricians, and then ask them to help you reconnect in time, so that the problem will be better solved.

If it is loose and not clamped, the current passing through it is large, and it is easy to heat up and oxidize. Finally, it may cause circuit breakage or easily cause electrical fire accidents.

First of all, when wiring, it should be tightened at one time, and the wire of appropriate size and diameter should be selected as the wire, the current is large and the wire is thin, which is easy to cause heating and oxidation of the connection point.

Budget whether the power and wire are matched, whether there is an insurance factor, and take into account factors such as instantaneous overload.

If it is 30A, the load power can be replaced by 40A, which can reduce the heating and oxidation of the terminal, and the safety of the equipment is also guaranteed.

Some wiring harness connectors are unstable or fail due to poor contact of electrical appliances. There are many reasons for this kind of problem, such as connector deformation, excessive fitting gap of the connector, unreliable connector fixing, incorrect installation position, foreign objects in the contact position of the terminal, damage during assembly, too small mating force, etc. This article analyzes and analyzes the three aspects of terminal deformation, plug structure and selection, process design and control.

First, the terminal deformation problem.

1. The deformation of the elastic structure of the female terminal leads to the virtual connection with the male terminal, see Figure 1.

2. There are impurities in the contact position of the male and female terminals, which affects the conduction performance of the terminals.

3. The problem of male terminal deformation (forward tilt and backward tilt, left and right skew), and the deformation of the male terminal (forward tilt and backward tilt, left and right skew) will generally cause the following problems:

1. The terminal is bent or broken when the sheath is docked; See Figure 3

2. The terminal enters other gaps, resulting in open circuits

The deformation of the male terminal (forward tilt and backward tilt, left and right skew) is generally caused by unreasonable manufacturing, packaging and assembly. However, it also has a certain relationship with the structure and design selection of the product.

Second, the product structure.

The tab terminal can be seen as a cantilever beam structure within the sheath. Terminal skew is the change in the deflection of the cantilever beam in the direction of force. According to the calculation formula of deflection, the deflection is proportional to the force and the size of the stress point from the support point, and inversely proportional to the cross-sectional area and elastic modulus (affected by the material).

It can be analyzed that terminal selection will affect the terminal deformation in the following aspects.

1. The width and thickness of the terminal are small.

Generally, the thickness of the pin-shaped part of the terminal is generally only small, especially the terminal type and below, so the smaller the terminal width, the lower the bending strength of the terminal, and the easier it is to cause bending.

2. The terminal material is soft.

The terminal material is generally copper, brass, phosphor bronze, alloy copper, steel, etc., the hardness of copper is the smallest, and the material directly affects the modulus of elasticity, so the softer the terminal, the worse the ability to resist deformation, the easier it is to cause bending.

3. The terminal size is long.

The longer the terminal size, the longer the arm is, and the greater the tip deformation caused by the force on the tip of the terminal.

Countermeasures: 1. Try to choose a terminal with a larger width, but it is not conducive to the requirements of miniaturization and lightweight; Consider widening the root of the terminal or adding stiffeners.

2. Choose phosphor bronze or alloy terminals made of hard material, but the conductivity of such terminals is slightly poor; Generally, the folded pin terminal is replaced with a one-piece pin terminal.

A connector is generally a connection between a pin contact and a hole contact. Terminals generally have plating such as lead-tin alloy, pure tin, nickel, silver-plated, silver-plated palladium alloy, gold plating, etc

Otherwise, I can't understand it later, and I may not dare to do this, in a different way.