CN217590651U - Accurate thick liquid switch board that grinds - Google Patents

Abstract

The utility model belongs to the technical field of the pulping and papermaking technique and specifically relates to an accurate thick liquid switch board that grinds is related to, including feed motor control circuit and thick liquid motor control circuit, feed motor control circuit includes miniature circuit breaker and converter, miniature circuit breaker with converter electric connection, thick liquid motor control circuit includes moulded case circuit breaker, soft starter and current transducer, moulded case circuit breaker with soft starter electric connection, soft starter with current transducer electric connection. The utility model has the advantages that through mutually supporting between converter and the current transmitter, make the feed volume of disc mill will be can automatic control, no longer need the operator to rely on experience to adjust the feed volume of disc mill, the feed volume of effectual accurate control disc mill feed motor to make the disc mill obtain the highest making beating efficiency, improve the production productivity.

Description

Accurate thick liquid switch board that grinds

Technical Field

The utility model relates to a pulping and papermaking technical field, specifically speaking relates to an accurate thick liquid switch board that grinds.

Background

The pulping process is an extremely important link in the production process of pulping and papermaking, the disc grinder is the most critical equipment for high-yield pulping, but disc grinder feed control is a complex control process with large lag, nonlinearity and time-varying property, and is characterized in that the control and adjustment time is long, obvious oscillation is generated, disc grinder blades are easily damaged when the oscillation is severe, the feed amount is adjusted by a traditional hand wheel, an operator is required to adjust the pulping degree according to the actually measured pulping degree, the feed amount is controlled by manually adjusting the hand wheel by experience so as to adjust the pulping degree, the adjusting mode needs manual operation, and the accurate pulping control cabinet has large errors and large defects, so that the accurate pulping control cabinet is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an accurate thick liquid switch board to solve the problem that proposes in the above-mentioned background art.

In order to realize the above purpose, the utility model provides an accurate thick liquid switch board, including feed motor control circuit and thick liquid motor control circuit, feed motor control circuit includes miniature circuit breaker and converter, miniature circuit breaker with converter electric connection, thick liquid motor control circuit includes moulded case circuit breaker, soft starter and current transducer, moulded case circuit breaker with soft starter electric connection, soft starter with current transducer electric connection.

As a further improvement of the technical scheme, the miniature circuit breaker comprises an L1 phase, an L2 phase, an L3 phase, an N phase, a PE phase, a circuit breaker QF1 and a three-phase motor M1, wherein

The pin U1 of the three-phase motor M1 is connected with the pin U of the breaker QF1, the pin V1 of the three-phase motor M1 is connected with the pin V of the breaker QF1, the pin W1 of the three-phase motor M1 is connected with the pin W of the breaker QF1, and the pin PE of the three-phase motor M1 is grounded;

the pin R of the circuit breaker QF1 is connected with the L1 phase, the pin S of the circuit breaker QF1 is connected with the L2 phase, the pin T of the circuit breaker QF1 is connected with the L3 phase, and the pin 2 of the circuit breaker is connected with the PE phase and is grounded.

3. As a further improvement of this technical solution, the frequency converter includes normally open button SA1, normally closed button SB1, normally open button BL2, normally open button BL3, contact KA1, contact KA2, normally open contact K1, normally open contact K2, normally closed contact K1, normally closed contact K2, normally closed contact K3, bulb L1, bulb BL2, bulb BL3, node 1, node 2, node 3, node 4, node 5, node 6, node 7, node 8, node 9, node 10, node 11, node 12, node 13, relay coil K1, relay coil K2, relay coil K3, contactor KM1, an operational relay, a fault relay, wherein

The normally open button SA1 is connected with the node 1, the node 6 and the contact KA2, the node 1 is connected with the normally closed button SB1, the normally closed button SB1 is connected with the node 2, the node 2 is connected with the normally open button BL2, the normally open button BL3, the normally open contact K1 and the normally open contact K2, and the normally open button BL2 and the normally open contact K1 are connected in parallel;

the node 6 is connected with the contact KA1, the contact KA1 is connected with the other end of the normally open contact K1, the normally open contact K1 is connected with the node 3 and the bulb BL2, the node 3 is connected with the relay coil K1, the relay coil K1 is connected with the node 4, and the bulb BL2 is connected with the node 3, the relay coil K1 and the node 4 in parallel;

the node 4 is connected with the normally closed contact K2, the normally closed contact K2 is connected with the node 5, the node 5 is connected with the normally closed contact K3, the contact KA2 is connected with the other end of the normally open button BL3, the normally open button BL3 is connected with the node 7, the node 7 is connected with the relay coil K2, the relay coil K2 is connected with the node 8, the node 8 is connected with the normally closed contact K1, the K2 is connected with the bulb BL3, the bulb BL2 is connected with the normally closed contact K1, and the normally closed contact K1 is connected with the node 5;

the normally closed contact K3 is connected with the contactor KM1, the relay coil K3 and the bulb L1, the bulb L1 is connected with the other end of the relay coil K3, and the relay coil K3 is connected with the bulb L1 in parallel;

the contactor KM1 is connected with the node 9, the node 9 is connected with a pin R5 of the operation relay, and a pin R4 of the operation relay is connected with the normally open button SA1;

the relay coil K3 is connected with the node 10, the node 10 is connected with a pin R2 of the fault relay, and a pin R1 of the fault relay is connected with the normally open button SA1;

the pin 11 of the fault relay is connected with the node 11, the node 11 is connected with the normally open contact K1, the normally open contact K1 is connected with the normally open contact K2 and the node 12, the node 12 is connected with the pin 02 of the fault relay, the normally open contact K2 is connected with the node 13, and the node 13 is connected with the pin 03 of the fault relay.

As a further improvement of the technical scheme, the molded case circuit breaker comprises an L1 phase, an L2 phase, an L3 phase, an N phase, a PE phase, a circuit breaker QF1, a three-phase motor M1, a soft-start cooling fan and a node F, wherein the L1 phase, the L2 phase, the L3 phase, the N phase, the PE phase, the circuit breaker QF1, the three-phase motor M1, the soft-start cooling fan and the node F are arranged in sequence, and the node F is arranged in sequence on the molded case circuit breaker

The pin U1 of the three-phase motor M1 is connected with the pin T1 of the breaker QF1, the pin V1 of the three-phase motor M1 is connected with the pin T2 of the breaker QF1, the pin W1 of the three-phase motor M1 is connected with the pin T3 of the breaker QF1, and the PE pin of the three-phase motor M1 is grounded;

a pin L1 of the circuit breaker QF1 is connected with the L1 phase, a pin L2 of the circuit breaker QF1 is connected with the L2 phase, a pin L3 of the circuit breaker QF1 is connected with the L3 phase, and a pin 2 of the circuit breaker QF1 is connected with the PE phase and is grounded;

the pin L3 of the circuit breaker QF1 is connected with the node F, the node F is connected with the pin 1 of the soft-start radiating fan, the pin 2 of the soft-start radiating fan is connected with the pin 3 of the soft-start radiating fan, and the pin 4 of the soft-start radiating fan is connected with the N phase.

As a further improvement of the technical scheme, the current transmitter is BD-3I3, a mutual inductor S1 is connected between a pin 3 and a pin 4 of the current transmitter, the mutual inductor S1 is mutual inductive with a pin L1 of the circuit breaker QF1, a mutual inductor S2 is connected between a pin 5 and a pin 6 of the current transmitter, the mutual inductor S2 is mutual inductive with the pin L2 of the circuit breaker QF1, a mutual inductor S3 is connected between a pin 7 and a pin 8 of the current transmitter, and the mutual inductor S3 is mutual inductive with the pin L3 of the circuit breaker QF 1.

As a further improvement of this technical scheme, soft starter includes normally closed button SA1, normally closed button SB1, normally open button SB2, node 1, node 2, node 3, node 4, node 5, node 6, node 7, node 8, relay coil K1, relay coil K2, relay coil K3, bulb HG1, bulb HR1, power, contact KA1, normally open contact K1, normally closed contact K3, wherein

The normally closed button SA1 is connected with the current transducer pin 1, the other end of the normally closed button SA1 is connected with the node 1 and the node 5, the node 1 is connected with the normally closed button SB1, the normally closed button SB1 is connected with the node 2, the node 2 is connected with the normally open button SB2 and the normally open contact K1, and the normally open contact K1 is connected with the normally open button SB2 in parallel;

the node 5 is connected with the contact KA1, the contact KA1 is connected with the node 3, the normally open button SB2 is connected with the node 3, the node 3 is connected with the relay coil K1, the relay coil K1 is connected with the node 4, the node 4 is connected with the normally closed contact K3, and the normally closed contact K3 is connected with the pin 2 of the current transmitter, the pin 12 of the power supply, the relay coil K2, the bulb HG1, the relay coil K3 and the bulb HR1;

a pin 12 of the power supply is connected with a pin 13 of the power supply, a pin 11 of the power supply is connected with the normally closed button SA1, the normally open contact K1 and a pin 17 of the power supply, and the normally open contact K1 is connected with a pin 16 of the power supply;

the pins 29 and 31 of the power supply are connected with the pin 11 of the power supply, the pin 30 of the power supply is connected with the node 7, the node 7 is connected with the relay coil K2 and the other end of the bulb HG1, and the relay coil K2 is connected with the bulb HG1 in parallel;

the pin 32 of the power supply is connected with the node 8, the node 8 is connected with the relay coil K3 and the other end of the bulb HR1, and the relay coil K3 is connected with the bulb HR1 in parallel.

Compared with the prior art, the beneficial effects of the utility model are that:

in the accurate pulping control cabinet, the mutual matching between the frequency converter and the current transmitter can be realized by arranging the feed motor control circuit and the pulping motor control circuit, so that the feed amount of the disc grinder can be automatically controlled, an operator is not required to adjust the feed amount of the disc grinder by experience, the feed amount of the feed motor of the disc grinder is effectively and accurately controlled, the disc grinder obtains the highest pulping efficiency, and the production capacity is improved.

Drawings

Fig. 1 is a flow chart of the system control of the present invention.

Fig. 2 is a schematic diagram of the miniature circuit breaker of the present invention.

Fig. 3 is a schematic diagram of a frequency converter portion of the present invention.

Fig. 4 is a schematic diagram of a second frequency converter part according to the present invention.

Fig. 5 is a schematic diagram of a control circuit part of the pulping motor of the present invention.

Fig. 6 is a schematic diagram of a second control circuit part of the pulping motor of the present invention.

Fig. 7 is a third schematic diagram of the control circuit part of the pulping motor of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Example 1

Referring to fig. 1 to 7, the present embodiment provides an accurate refining control cabinet, including a feeding motor control circuit and a refining motor control circuit, where the feeding motor control circuit includes a micro circuit breaker and a frequency converter, the micro circuit breaker is electrically connected to the frequency converter, the micro circuit breaker provides a feeding motor power supply and a power supply short circuit protection function, the frequency converter controls the feeding and retracting of a disc grinder feeding motor and the feeding and retracting speed, and provides multiple protection of short circuit defects and the like for the disc grinder feeding motor, the refining motor control circuit includes a plastic casing circuit breaker, a soft starter and a current transformer, the plastic casing circuit breaker is electrically connected to the soft starter, the soft starter is electrically connected to the current transformer, the plastic casing circuit breaker provides a disc grinder power supply and a power supply short circuit protection function, and the soft starter is used for smooth starting of a motor and a mechanical load by adopting voltage reduction, compensation, or frequency conversion in the starting process of a disc grinder, reducing the influence degree of the starting current on the power grid, and protecting the power grid and the mechanical system, and the current transformer is used for detecting the operation current of the disc grinder in the operation process of the disc grinder.

Further, the frequency converter comprises a normally open button SA1, a normally closed button SB1, a normally open button BL2, a normally open button BL3, a contact KA1, a contact KA2, a normally open contact K1, a normally open contact K2, a normally closed contact K1, a normally closed contact K2, a normally closed contact K3, a bulb L1, a bulb BL2, a bulb BL3, a node 1, a node 2, a node 3, a node 4, a node 5, a node 6, a node 7, a node 8, a node 9, a node 10, a node 11, a node 12, a node 13, a relay coil K1, a relay coil K2, a relay coil K3, a contactor KM1, an operation relay, a fault relay, wherein

The normally open button SA1 is connected with a node 1, a node 6 and a contact KA2, the node 1 is connected with a normally closed button SB1, the normally closed button SB1 is connected with a node 2, the node 2 is connected with a normally open button BL2, a normally open button BL3, a normally open contact K1 and a normally open contact K2, and the normally open button BL2 and the normally open contact K1 are connected in parallel;

a contact point KA1 of a node 6 is connected, the contact point KA1 is connected with the other end of a normally open contact K1, the normally open contact K1 is connected with a node 3 and a bulb BL2, the node 3 is connected with a relay coil K1, a relay coil K1 is connected with a node 4, and the bulb BL2 is connected with the node 3, the relay coil K1 and the node 4 in parallel;

the node 4 is connected with a normally closed contact K2, the normally closed contact K2 is connected with the node 5, the node 5 is connected with a normally closed contact K3, the contact KA2 is connected with the other end of a normally open button BL3, the normally open button BL3 is connected with the node 7, the node 7 is connected with a relay coil K2, the relay coil K2 is connected with the node 8, the node 8 is connected with a normally closed contact K1, the K2 is connected with a bulb BL3, the bulb BL2 is connected with a normally closed contact K1, and the normally closed contact K1 is connected with the node 5;

the normally closed contact K3 is connected with the contactor KM1, the relay coil K3 and the bulb L1, the bulb L1 is connected with the other end of the relay coil K3, and the relay coil K3 is connected with the bulb L1 in parallel;

the contactor KM1 is connected with a node 9, the node 9 is connected with a pin R5 of the running relay, and a pin R4 of the running relay is connected with a normally open button SA1;

a relay coil K3 is connected with a node 10, the node 10 is connected with a pin R2 of the fault relay, and a pin R1 of the fault relay is connected with a normally open button SA1;

the pin 11 of fault relay connects node 11, and node 11 connects normally open contact K1, and normally open contact K1 connects normally open contact K2 and node 12, and node 12 connects fault relay's pin 02, normally open contact K2 connects node 13, and node 13 connects fault relay's pin 03, can control the feed volume of disc grinder feed motor through being equipped with the converter, controls the feed speed to provide multiple protection for disc grinder feed motor. The miniature circuit breaker comprises an L1 phase, an L2 phase, an L3 phase, an N phase, a PE phase, a circuit breaker QF1 and a three-phase motor M1, wherein

A pin U1 of a three-phase motor M1 is connected with a pin U of a breaker QF1, a pin V1 of the three-phase motor M1 is connected with a pin V of the breaker QF1, a pin W1 of the three-phase motor M1 is connected with a pin W of the breaker QF1, and a PE pin of the three-phase motor M1 is grounded;

a pin R of the breaker QF1 is connected with an L1 phase, a pin S of the breaker QF1 is connected with an L2 phase, a pin T of the breaker QF1 is connected with an L3 phase, a pin 2 of the breaker is connected with a PE phase and is grounded, and a miniature breaker is arranged to provide power for a feed motor and achieve the short-circuit protection function of a circuit.

Still further, the molded case circuit breaker comprises an L1 phase, an L2 phase, an L3 phase, an N phase, a PE phase, a circuit breaker QF1, a three-phase motor M1, a soft-start cooling fan and a node F, wherein the L1 phase, the L2 phase, the L3 phase, the N phase, the PE phase, the circuit breaker QF1, the three-phase motor M1, the soft-start cooling fan and the node F are arranged in sequence, and the soft-start cooling fan is arranged on the same plane, and the node F is arranged on the same plane, and the soft-start cooling fan is arranged on the same plane

A pin U1 of a three-phase motor M1 is connected with a pin T1 of a breaker QF1, a pin V1 of the three-phase motor M1 is connected with a pin T2 of the breaker QF1, a pin W1 of the three-phase motor M1 is connected with a pin T3 of the breaker QF1, and a PE pin of the three-phase motor M1 is grounded;

a pin L1 of the breaker QF1 is connected with the L1 phase, a pin L2 of the breaker QF1 is connected with the L2 phase, a pin L3 of the breaker QF1 is connected with the L3 phase, and a pin 2 of the breaker QF1 is connected with the PE phase and is grounded;

a pin L3 of the circuit breaker QF1 is connected with a node F, the node F is connected with a pin 1 of the soft-start cooling fan, a pin 2 of the soft-start cooling fan is connected with a pin 3 of the soft-start cooling fan, a pin 4 of the soft-start cooling fan is connected with an N phase, and the power supply of the disc grinding motor and the power supply short circuit protection function can be provided through the plastic case circuit breaker.

Furthermore, the current transmitter is BD-3I3, a mutual inductor S1 is connected between a pin 3 and a pin 4 of the current transmitter, the mutual inductor S1 is mutual inductive with a pin L1 of the breaker QF1, a mutual inductor S2 is connected between a pin 5 and a pin 6 of the current transmitter, the mutual inductor S2 is mutual inductive with a pin L2 of the breaker QF1, a mutual inductor S3 is connected between a pin 7 and a pin 8 of the current transmitter, the mutual inductor S3 is mutual inductive with a pin L3 of the breaker QF1, and the running current of the disc grinder can be detected in the running process of the disc grinder through the arrangement of the current transmitter.

In addition, the soft starter comprises a normally closed button SA1, a normally closed button SB1, a normally open button SB2, a node 1, a node 2, a node 3, a node 4, a node 5, a node 6, a node 7, a node 8, a relay coil K1, a relay coil K2, a relay coil K3, a bulb HG1, a bulb HR1, a power supply, a contact KA1, a normally open contact K1, a normally closed contact K3, wherein

The normally closed button SA1 is connected with a current transducer pin 1, the other end of the normally closed button SA1 is connected with a node 1 and a node 5, the node 1 is connected with a normally closed button SB1, the normally closed button SB1 is connected with a node 2, the node 2 is connected with a normally open button SB2 and a normally open contact K1, and the normally open contact K1 is connected with the normally open button SB2 in parallel;

a contact point KA1 of a node 5, a contact point KA1 is connected with a node 3, a normally open button SB2 is connected with the node 3, the node 3 is connected with a relay coil K1, a relay coil K1 is connected with a node 4, the node 4 is connected with a normally closed contact K3, the normally closed contact K3 is connected with a pin 2 of a current transmitter, a pin 12 of a power supply, the relay coil K2, a bulb HG1, the relay coil K3 and a bulb HR1;

a pin 12 of the power supply is connected with a pin 13 of the power supply, a pin 11 of the power supply is connected with a normally closed button SA1, a normally open contact K1 and a pin 17 of the power supply, and the normally open contact K1 is connected with a pin 16 of the power supply;

a pin 29 and a pin 31 of the power supply are connected with a pin 11 of the power supply, a pin 30 of the power supply is connected with a node 7, the node 7 is connected with the other ends of the relay coil K2 and the bulb HG1, and the relay coil K2 is connected with the bulb HG1 in parallel;

a pin 32 of the power supply is connected with a node 8, the node 8 is connected with the other end of a relay coil K3 and the other end of a bulb HR1, the relay coil K3 is connected with the bulb HR1 in parallel, and the soft starter is arranged to realize smooth starting of the motor and mechanical loads through voltage reduction, compensation or frequency conversion in the starting process of the disc grinder.

The accurate pulping control cabinet of this embodiment, soft starter provides a smooth stable start-up process for the disc mill when specifically using, and the current transmitter is used for the operational current of disc mill in the disc mill operation, and feeds back to the switch board in real time, and the switch board carries out relevant algorithm and various controls and issues algorithm and control to the variable frequency drive system according to the current that the current transmitter fed back, and the frequency converter removes the system and accepts the switch board control and drives disc mill feed motor to advance and retreat, drives disc mill drive disc mill to change the feed rate in step for the disc mill to make the disc mill obtain the highest making beating efficiency.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only the preferred embodiments of the present invention, and is not intended to limit the present invention, and that there may be various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The accurate pulping control cabinet is characterized in that: including feed motor control circuit and defibrination motor control circuit, feed motor control circuit includes miniature circuit breaker and converter, miniature circuit breaker with converter electric connection, defibrination motor control circuit includes moulded case circuit breaker, soft starter and current transducer, moulded case circuit breaker with soft starter electric connection, soft starter with current transducer electric connection.

2. The refining control cabinet of claim 1, wherein: the miniature circuit breaker comprises an L1 phase, an L2 phase, an L3 phase, an N phase, a PE phase, a circuit breaker QF1 and a three-phase motor M1, wherein

The pin U1 of the three-phase motor M1 is connected with the pin U of the circuit breaker QF1, the pin V1 of the three-phase motor M1 is connected with the pin V of the circuit breaker QF1, the pin W1 of the three-phase motor M1 is connected with the pin W of the circuit breaker QF1, and the PE pin of the three-phase motor M1 is grounded;

the pin R of the breaker QF1 is connected with the L1 phase, the pin S of the breaker QF1 is connected with the L2 phase, the pin T of the breaker QF1 is connected with the L3 phase, and the pin 2 of the breaker is connected with the PE phase and is grounded.

3. The refining control cabinet of claim 1, wherein: the frequency converter comprises a normally open button SA1, a normally closed button SB1, a normally open button BL2, a normally open button BL3, a contact KA1, a contact KA2, a normally open contact K1, a normally open contact K2, a normally closed contact K1, a normally closed contact K2, a normally closed contact K3, a bulb L1, a bulb BL2 and a bulb BL3, node 1, node 2, node 3, node 4, node 5, node 6, node 7, node 8, node 9, node 10, node 11, node 12, node 13, relay coil K1, relay coil K2, relay coil K3, contactor KM1, an operating relay, a fault relay, wherein

The normally open button SA1 is connected with the node 1, the node 6 and the contact KA2, the node 1 is connected with the normally closed button SB1, the normally closed button SB1 is connected with the node 2, the node 2 is connected with the normally open button BL2, the normally open button BL3, the normally open contact K1 and the normally open contact K2, and the normally open button BL2 and the normally open contact K1 are connected in parallel;

the node 6 is connected with the contact KA1, the contact KA1 is connected with the other end of the normally open contact K1, the normally open contact K1 is connected with the node 3 and the bulb BL2, the node 3 is connected with the relay coil K1, the relay coil K1 is connected with the node 4, and the bulb BL2 is connected with the node 3, the relay coil K1 and the node 4 in parallel;

the node 4 is connected with the normally closed contact K2, the normally closed contact K2 is connected with the node 5, the node 5 is connected with the normally closed contact K3, the contact KA2 is connected with the other end of the normally open button BL3, the normally open button BL3 is connected with the node 7, the node 7 is connected with the relay coil K2, the relay coil K2 is connected with the node 8, the node 8 is connected with the normally closed contact K1, the K2 is connected with the bulb BL3, the bulb BL2 is connected with the normally closed contact K1, and the normally closed contact K1 is connected with the node 5;

the normally closed contact K3 is connected with the contactor KM1, the relay coil K3 and the bulb L1, the bulb L1 is connected with the other end of the relay coil K3, and the relay coil K3 is connected with the bulb L1 in parallel;

the contactor KM1 is connected with the node 9, the node 9 is connected with a pin R5 of the operation relay, and a pin R4 of the operation relay is connected with the normally open button SA1;

the relay coil K3 is connected with the node 10, the node 10 is connected with a pin R2 of the fault relay, and a pin R1 of the fault relay is connected with the normally open button SA1;

the pin 11 of the fault relay is connected with the node 11, the node 11 is connected with the normally open contact K1, the normally open contact K1 is connected with the normally open contact K2 and the node 12, the node 12 is connected with the pin 02 of the fault relay, the normally open contact K2 is connected with the node 13, and the node 13 is connected with the pin 03 of the fault relay.

4. The refining control cabinet of claim 1, wherein: the molded case circuit breaker comprises an L1 phase, an L2 phase, an L3 phase, an N phase, a PE phase, a circuit breaker QF1, a three-phase motor M1, a soft-start cooling fan and a node F, wherein the L1 phase, the L2 phase, the L3 phase, the N phase, the PE phase, the circuit breaker QF1, the three-phase motor M1, the soft-start cooling fan and the node F are arranged in sequence, and the soft-start cooling fan is arranged on the molded case circuit breaker

The pin U1 of the three-phase motor M1 is connected with the pin T1 of the breaker QF1, the pin V1 of the three-phase motor M1 is connected with the pin T2 of the breaker QF1, the pin W1 of the three-phase motor M1 is connected with the pin T3 of the breaker QF1, and the PE pin of the three-phase motor M1 is grounded;

a pin L1 of the circuit breaker QF1 is connected with the L1 phase, a pin L2 of the circuit breaker QF1 is connected with the L2 phase, a pin L3 of the circuit breaker QF1 is connected with the L3 phase, and a pin 2 of the circuit breaker QF1 is connected with the PE phase and is grounded;

the pin L3 of the circuit breaker QF1 is connected with the node F, the node F is connected with the pin 1 of the soft-start radiating fan, the pin 2 of the soft-start radiating fan is connected with the pin 3 of the soft-start radiating fan, and the pin 4 of the soft-start radiating fan is connected with the N phase.

5. The fine refining control cabinet of claim 4, wherein: the current transmitter is BD-3I3, be connected with mutual inductor S1 between current transmitter 'S pin 3 and pin 4, mutual inductor S1 with circuit breaker QF 1' S pin L1 is mutual inductance, be connected with mutual inductor S2 between current transmitter 'S pin 5 and the pin 6, mutual inductor S2 with circuit breaker QF 1' S pin L2 is mutual inductance, be connected with mutual inductor S3 between current transmitter 'S pin 7 and the pin 8, mutual inductor S3 with circuit breaker QF 1' S pin L3 is mutual inductance.

6. The refining control cabinet of claim 5, wherein: the soft starter comprises a normally closed button SA1, a normally closed button SB1, a normally open button SB2, a node 1, a node 2, a node 3, a node 4, a node 5, a node 6, a node 7, a node 8, a relay coil K1, a relay coil K2, a relay coil K3, a bulb HG1, a bulb HR1, a power supply, a contact KA1, a normally open contact K1 and a normally closed contact K3, wherein

The normally closed button SA1 is connected with the current transducer pin 1, the other end of the normally closed button SA1 is connected with the node 1 and the node 5, the node 1 is connected with the normally closed button SB1, the normally closed button SB1 is connected with the node 2, the node 2 is connected with the normally open button SB2 and the normally open contact K1, and the normally open contact K1 is connected with the normally open button SB2 in parallel;

the node 5 is connected with the contact KA1, the contact KA1 is connected with the node 3, the normally open button SB2 is connected with the node 3, the node 3 is connected with the relay coil K1, the relay coil K1 is connected with the node 4, the node 4 is connected with the normally closed contact K3, and the normally closed contact K3 is connected with the pin 2 of the current transmitter, the pin 12 of the power supply, the relay coil K2, the bulb HG1, the relay coil K3 and the bulb HR1;

a pin 12 of the power supply is connected with a pin 13 of the power supply, a pin 11 of the power supply is connected with the normally closed button SA1, the normally open contact K1 and a pin 17 of the power supply, and the normally open contact K1 is connected with a pin 16 of the power supply;

the pins 29 and 31 of the power supply are connected with the pin 11 of the power supply, the pin 30 of the power supply is connected with the node 7, the node 7 is connected with the relay coil K2 and the other end of the bulb HG1, and the relay coil K2 is connected with the bulb HG1 in parallel;

the pin 32 of the power supply is connected with the node 8, the node 8 is connected with the relay coil K3 and the other end of the bulb HR1, and the relay coil K3 is connected with the bulb HR1 in parallel.

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