PHASE-LOST PROTECTIVE SOCKET FOR THREE PHASE MOTOR

The utility model relates to a phase-loss protective socket for a three phase motor, comprising an executive device for a normally closed contact, an insulating push board and tensile safety mechanisms. The insulating push board is tightly contacted with three tensile safety mechanisms, and the end...

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Bibliographic Details
Main Author ZHOU TIANFEI
Format Patent
LanguageEnglish
Published 11.09.1991
Edition5
Subjects
BASIC ELECTRIC ELEMENTS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
EMERGENCY PROTECTIVE DEVICES
GENERATION
RELAYS
SELECTORS
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Summary:The utility model relates to a phase-loss protective socket for a three phase motor, comprising an executive device for a normally closed contact, an insulating push board and tensile safety mechanisms. The insulating push board is tightly contacted with three tensile safety mechanisms, and the end part of the insulating push board is contacted with the executive device for the normally closed contact. Three phase main fuses are respectively connected in parallel with one tensile safety mechanismwhose fuse wire is smaller than the fuse wire of the main fuses, and the executive device for the normally closed contact is connected in series between any phase of an electric source and the control circuit of the motor. When a phase-loss occurs in any phase, the protective socket can reliably guarantee the motor to stop running. The socket which has the advantages of simple structure and low cost can be suitable for different working environments, and can simultaneously protect a plurality of motors which are combined together.
Bibliography:Application Number: CN1990225960U