【Q&A Question 169】June 18, 2018
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【Q&A Question 169】June 18, 2018: Briefly explain the reasons why a motor will not start (1) Circuit disconnection, (2) Poor contact or the switch not fully open, (3) Faulty starter or poor contact, (4) Damaged windings. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below. The APP short-video skills competition has started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
The motor is not powered, the wiring is not connected, the motor bearings are seized, and the interlock of the pump with a interlocking mechanism has not been reset
1. The motor itself is broken. 2. The motor is not powered. 3. Incorrect power supply.
The motor is not powered, the wiring is not connected, the motor bearings are seized, and the interlock of the pump with a interlocking mechanism has not been reset
1. The motor itself is damaged. 2. The motor isn’t being powered. 3. The power supply is incorrect.
①The power switch is not turned on; ② The fuse has blown; ③ The overload protection mechanism was activated but not reset in time; ④ The start button is malfunctioning; ⑤ The wiring of the motor protection device is incorrect.
①The power switch is not turned on; ② The fuse has blown; ③ The overload protection mechanism was activated but not reset in time; ④ The start button is malfunctioning; ⑤ The wiring of the motor protection device is incorrect.
(1) Circuit disconnection, (2) Poor contact or the switch not fully open, (3) Faulty starter or poor contact, (4) Damaged windings.
The power switch is not turned on; the fuse has blown; it has not been reset in time after the overload protection mechanism activated, etc
(1) Motor power supply phase loss (one or two fuses blown)； (2) Break in the stator or rotor windings of the motor.
One phase is missing in the power supply input. Phase loss caused by poor contact of the contactor contacts. The thermal relay has tripped and will not reset. The motor itself is broken. The normally closed contact of the stop button is faulty. The normally open contact of the start button has poor contact. The interlocked normally closed contacts have poor contact. Control circuit, main circuit, loose wiring. The contactor coil is open-circuited. The main contacts of the contactor are not in good contact.