LOW-PRESSURE SWITCH WITH BY-PASS TERMINAL FOR THREE-PHASE/FOUR-WIRE

摘要

PURPOSE:To improve stability and durability by making a switch main body a full sealing type as well as three-phase contacts integrated so as to be concurrently operable. CONSTITUTION:Three sets of a contact assembly body 35 electrically connecting the fixed contacts of a power source side and a load side are connected for three-phase, and housed within housings 3 and 4 for sealing with a neutral-phase electrode assembly body 35 connected. A locking mechanism is released with a push button 11 depressed, and a switch action is made with three sets of a movable contact, integrally movable by the operation of a handle 16, actuated. And an uncertain element such as insufficient clamping is eliminated with a tulip terminal is used to the terminal of a connection wire, and the power failure in a load side is unoccurring by connecting from other power source at the time of changing a transformer with a by-pass terminal provided on each phase. This prevents the corrosion or performance deterioration with a rain water.