How to choose a good terminal block?

How to choose a good terminal block? These are some points you need to know! The task of the wiring system is to make mechanically and electrically reliable connections to the wires. Crimp frames can effectively realize this function. Terminal block subsystem: the task of the wiring system is to make a reliable mechanical and electrical connection to the conductor. The crimping frame effectively fulfills this function. The crimp frame is made of hardened and galvanized steel, and the steel screws, which can withstand large moments, hold the wires firmly in place. Copper conductive sheets coated with a flexible tin-lead alloy ensure an airtight, low-resistance, permanent connection to the wire. The following advantages of this wiring system are favored by users and are widely adopted:

First: large contact surface, and contact pressure, and can be any lateral contact; with self-locking, anti-vibration, anti-loosening function; can be installed to test the jack, without maintenance; contact point absolutely airtight, corrosion resistance; multi-stranded wire allows not crimp the end of the end, can be directly coupled; easy to use; is widely used around the globe; Second: contact pressure: in the terminals, the contact force is one of the basic elements. If there is not enough contact pressure, the use of even better conductive materials is not helpful. Because, if the contact force is too low, the conductor and the conductive sheet will produce displacement between the oxidized contamination, so that the contact resistance increases and leads to overheating. In the case of the WDU 2.5 crimp frame assembly, for example, a torque of only 0.8 Nm on the screws produces a real contact force of up to 750 N, which is independent of the wire cross-section. Thus, with the crimp frame you have a permanent connection with a large contact area and high contact force, independent of any environmental influences. Third: small voltage drop: the size of the voltage drop at the point of contact is also one of the measures to identify the quality of the terminal block. Even if a small force distance is applied to the screws, the value of the voltage drop is still well below the limits required by VDE 0611. At the same time, the applied torque varies over a wide range and the voltage drop remains almost constant. Therefore, the quality of the connection is not affected by the fact that different operators use different amounts of force.

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