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Junction Box Mould Heat Resistance
- Jul 06, 2017 -

Three-phase four-wire DT electrical junction box, Junction Box Mould also called the meter table junction box.Junction Box Mould  Watt-hour meter junction box is a special junction box in the standard wiring of the electric energy metering device, which is connected with wiring and safety protection.With the transparent dust cover, Junction Box Mould the internal components and terminal status can be directly observed. Both the conductor and the wiring screw are selected. , Nickel plated on the surface. Circuit connection is reliable; insulation box material, heat resistance and impact resistance is good, Junction Box Mould electrical clearance and creepage distance are higher than the national standard.

Bubble for you to analyze the common fatal fault form of the terminal has the following:

1. Poor contact: the metal conductor inside the terminal is the core part of the terminal, Junction Box Mould it will power, signal, etc. to contact with other parts on the contact. Junction Box Mould The metal conductors inside the terminals must have good conductivity. If the contact design is unreasonable, Junction Box Mould the material selection error, size substandard, or improper treatment of the plating layer, will cause the connector terminal bad contact.

2. Fixed bad: the terminal needs to be fixed in a certain position in order to achieve a stable connection. Sometimes careless installation is not perfect, Junction Box Mould or limited product durability, such as mating too many times, resulting in poor fixation, light exposure to reliable contact caused by instantaneous power failure, serious product disintegration. Disintegration refers to the terminal in the state of the joint, due to material, design, process and other reasons leading to unreliable structure caused by the plug and socket between the pin and the hole between the abnormal separation will result in control system power transmission and Signal control interrupt the serious consequences. As the design is unreliable, material selection error, Junction Box Mould improper selection of forming process, heat treatment, mold, assembly, welding and other poor quality of the process, the assembly is not in place and so will cause poor fixation.

3. Insulation is poor: the role of the insulator is to keep the contact in the correct position, and between the contact and the contact, the contact between the shell and the insulation. So the insulation must have excellent electrical properties, mechanical properties and process performance. Junction Box Mould Especially with the high density, miniaturized terminal blocks are widely used, the effective wall thickness of the insulator is getting thinner. This is the insulation material, injection mold precision and molding process put forward more stringent requirements. As the surface of the insulator or the existence of metal residues, Junction Box Mould the surface dust, Junction Box Mould flux and other pollution damp, organic material precipitates and harmful gas adsorption film and surface water film fusion to form ionic conductive channels, moisture absorption, mildew, insulating material aging and other reasons, Junction Box Mould Will cause short circuit, leakage, breakdown, insulation resistance is low and other poor insulation phenomenon. Any failure of a terminal will lead to the failure of the entire system engineering, Junction Box Mould so we should try to avoid the use of the above mentioned may lead to the failure of the terminal terminal situation, so that the terminal more durable.