MCCB this product, I believe most people are not familiar with it, but very few friends can discern differences in the quality of molded case circuit breakers. I believe many of my friends use the MCCB will often appear many faults, primarily reason is did not choose a good quality MCCB caused. So how to effectively distinguish the quality of mccb good and bad? Do not worry, Meba Electric will teach you a trick, as long as they could use well can selection a excellent quality molded case circuit breakers.
We all know that there are kinds of molded case circuit breakers in the market, product quality is uneven. If not distinguish very easy to buy substandard quality MCCB, so how to distinguish before buying?
◆Meba Electric teach you a trick is to look at the molded case circuit breakers contacts, the best quality contacts is silver contacts, followed alloy contacts. As we all know the price of silver is not cheap, MCCB real use silver contacts, the price is expensive, so the market price gap is very big. Of course, some manufacturers in order to benefit, which uses composite silver or silver-plated, such an approach will have an impact on product quality.
◆Use silver contacts MCCB majority are very good quality, of course, in order to avoid to choose is used in composite silver or silver-plated MCCB, we also need to be a trick, that is to be distinguish MCCB contacts.
◆When we open the lid of the circuit breaker, get Arc Chute, you can clearly see that the static contact of the MCCB. Both the?alloy contact?or?composite?silver contact will?cross on?a layer of silver,?so?we couldn’t distinguish?the breaker contact?is?what?material, but we can use a sharp tool to draw the contact surface.
◆If it is alloy contact will soon see bottom color is the copper colored, otherwise it is a composite silver contacts still unable distinguish.Then we should scratch from the side surface of the contact side, when we remove the surface of silver can be seen that there are two layers of different materials, white metal is silver, copper as copper base.If it is silver contacts from top to bottom is a silver white, if not that is a former two.