3/14/2024 0 Comments Touch sensor continuously bouncing![]() This is the durability of opening and closing of the contacts based on the specified switching frequency with no load applied. It is also sometimes referred to as "Form C1" contacts or "Continuous" contacts. MBB (Make-Before-Break) contacts (shorting contacts) are part of a group of contacts with a specified operation sequence, designed to close before another contact can open. The standard measuring method of contact resistance uses the voltage-drop method (four-terminal measurement) as shown in the drawing below at the designated measuring currents. The size of the values do not indicate performance during actual operation. The contact resistances given in this catalog are the initial specified values. The contact resistance is a combination of the inherent resistance of the conductors that make up the armature, terminals, contacts, and other parts, the boundary resistance where the two contacts meet, and the concentrated resistance. Types of contact forms include Form B contacts (Break contacts), Form A contacts (Make contacts) and Form C contacts (Transfer contacts). Relays have different inductances for "pull-in" and "drop-out" states.Ĭoil resistance This is the resistance of a coil measured between the coil terminals when the coil temperature is at +23☌.Ĭontact forms refer to the contact mechanism. For a DC relay, inductance value is determined by the time constant when a rectangular wave is applied.įor an AC relay, inductance value is at the rated frequency. ![]()
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