Motor protector equipped with auxiliary device

Abstract

The invention discloses a motor protector equipped with an auxiliary device, which comprises a protector body and the auxiliary device. One side of the protector body is provided with a first through hole, the auxiliary device comprises an opening and closing deflector rod extending into the first through hole, and an operation mechanism is arranged in the protector body. The operation mechanism comprises a tripping lever provided with a driving groove structure, one end of the opening and closing deflector rod penetrates into the driving groove structure, when the operation mechanism executes closing or opening, the tripping lever is driven to rotate forwards or reversely, and the opening and closing deflector rod is driven by the driving groove structure to perform switching motion between a first position and a second position, and thus,the normally-open and normally-closed contact groups on the auxiliary device are controlled to perform alternate operations of closing and opening. According to the technical scheme, the motor protection device can be externally connected with an indicating device through the normally-open contact group and the normally-closed contact group on the auxiliary device, the signal external detection function is achieved, the motor protector can be used for interlocking protection control, the setting cost is reduced, and the use performance of a product is improved.

Description

technical field [0001] The invention relates to the technical field of motor protectors, in particular to a motor protector equipped with auxiliary devices. Background technique [0002] The motor protector is used for the infrequent start, overload protection and short circuit protection of the motor. It can be seen that in addition to the basic switching function for controlling the start / stop of the motor, the existing motor starter also requires additional functions for safety protection and control of the operating characteristics of the motor, etc. Other functions, such as motor protectors, usually have short-circuit protection and overload protection functions. When the motor starter is connected to the protected circuit, when the load is overloaded or the phase is open, the bimetal in the overload release will bend to a certain extent when heated. The stroke is to drive the operating mechanism in the motor protector to trip, thereby disconnecting the circuit to play ...

AI Technical Summary

Problems solved by technology

Although the motor protector can protect the motor from overload and short circuit, there are still the following problems in the actual use of the existing motor protector: First, the motor protector can only observe its working status on the spot, but cannot detect it conveniently in real time. When the motor protector is in the starting and stopping working state, it does not have the signal external inspection function; secondly, the existing motor protector is limited by the structure, and it also lacks the protection of the motor interlock control, so it is necessary to install another on the motor control circuit. Group of relays, complex line connection, high setup cost

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