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Protector for electromotor heavy load startup

A technology for protectors and motors, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as heavy loads or long-time starting, and achieve simple and convenient installation and debugging, strong anti-interference ability, and good stability.

Inactive Publication Date: 2008-08-13
蔡甫寒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, most motor protectors protected the motor according to the requirements of conventional motor starting and running, and could not meet the special needs of heavy load or long-term starting.

Method used

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  • Protector for electromotor heavy load startup
  • Protector for electromotor heavy load startup
  • Protector for electromotor heavy load startup

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] See Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, (1) Shell 1, (1) Shell 2, (3) Shell 3, (4) Shell 4, (5) Current setting knob and scale, (6) fault memory indicator light, (7) wiring terminal, (8) reset button, (9) through hole, (10) circuit.

[0018] As shown in Figure 1, Figure 2, Figure 3, and Figure 4, the same circuit is installed inside the housing 1(1), housing 2(2), housing 3(3), and housing 4(4) ( 10), the exterior is equipped with current setting knob and scale (5), fault memory indicator light (6), terminal block (7), reset button (8), housing (2), housing (3), housing There are through holes (9) on (4).

[0019] As shown in Figure 5, the current signals detected by transformers L1, L2, and L3 are rectified by DB1, DB2, filtered by C1, RA, RB, and RC, and the current signals are taken out from RA, RB, and RC and entered into the U1A operational amplifier for amplification, W1 Potentiometer setting current, U1A output is divided into three channels, one ...

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Abstract

The invention provides a special protector for the loaded start of motor. Same circuits are disposed in four different shells, and a current setting knob, calibration, a fault memory indicator, connection terminals, a reset button and perforation hole are mounted at outside. The circuit comprises a current detecting and setting circuit, an overload heat memory inverse time limiting and loaded start protecting circuit, a phase failure and phase unbalance protecting circuit, a power source and current indicating circuit, a relay output controlling circuit and a power switch circuit. The invention has complete protection performance thereby being applicable for protecting the motor which is in loaded start or has large mass load.

Description

technical field [0001] The invention relates to the field of automatic control, especially a motor protector. technical background [0002] In the past, most motor protectors protect the motor according to the requirements of conventional motor starting and running, and cannot meet the special needs of heavy load or long-term starting. Contents of the invention [0003] The object of the present invention is to address the above defects and provide a special protector for heavy-duty starting of motors, which can automatically delay the starting time to a limit value and has a protective effect. [0004] The technical solution of the present invention is a special protector for heavy-duty starting of motors, including housing 1, housing 2, housing 3, housing 4, current setting knob and scale, fault memory indicator light, terminal block, reset button, through-wire hole, circuit. [0005] It is characterized in that the insides of the shells of the four different shapes of...

Claims

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Application Information

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IPC IPC(8): H02H7/08H02H7/085H02H7/09
Inventor 蔡甫寒周挺巧
Owner 蔡甫寒
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