CN214464821U - One-to-two variable frequency motor accident button control wiring circuit - Google Patents
One-to-two variable frequency motor accident button control wiring circuit Download PDFInfo
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- CN214464821U CN214464821U CN202120301399.2U CN202120301399U CN214464821U CN 214464821 U CN214464821 U CN 214464821U CN 202120301399 U CN202120301399 U CN 202120301399U CN 214464821 U CN214464821 U CN 214464821U
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- auxiliary contact
- button
- control wiring
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Abstract
The utility model discloses a one-to-two variable frequency motor accident button control wiring circuit, which is characterized by comprising an accident button control wiring in an A pump power frequency switch cabinet and an accident button control wiring in a variable frequency power switch cabinet; the accident button control wiring in the variable-frequency power switch cabinet comprises an A pump accident trip button, a B pump accident trip button, a contactor auxiliary contact QF4, a contactor auxiliary contact QF5 and a QF circuit breaker operation box. The working condition that the condensate pump can operate at the working frequency of 1 pump and operate at the variable frequency of 1 pump is ensured.
Description
Technical Field
The utility model relates to a gas turbine power generation technical field, concretely relates to one drags two inverter motor accident button control wiring circuit.
Background
The capacity of a steam turbine steam bypass valve of a gas turbine power plant is 100%, a condensate pump is required to provide a large amount of bypass temperature-reducing water, the capacity of the steam turbine steam bypass valve of the coal-fired power plant is usually 30% -40%, and the proportion of the amount of the temperature-reducing water required to be added by the condensate pump is small. Therefore, for the gas turbine power plant, when 100% of bypasses operate, the condensate pump in variable-frequency operation firstly increases the frequency to provide the flow of the pump, and if the frequency reaches 50Hz and cannot meet the temperature reduction water required by the bypasses, the spare condensate pump needs to be started, so that the condensate system has the working condition that the pump A operates frequently and the pump B operates in variable-frequency mode. A primary wiring of a condensate pump one-to-two variable frequency motor in a large-scale gas turbine power plant is shown in figure 1, and a motor accident button is used for emergency pump stopping measures taken when an inspector finds equipment faults during inspection. When the pump A operates frequently and the pump B operates in a frequency conversion manner, the pump A fails, and the conventional accident button controls the wiring under the working condition, so that the power supply of the pump A and the power supply of the frequency converter are simultaneously cut off, and the pump B is stopped. The conventional wiring is shown in fig. 2.
SUMMERY OF THE UTILITY MODEL
Not enough to the above among the prior art, the utility model provides a pair of one drags two inverter motor accident button control wiring circuit has solved and has moved frequently when A pump worker, and B pump frequency conversion moves, and A pump trouble this moment, conventional accident button control wiring can make A pump worker frequently power and converter power cut off simultaneously under this kind of operating mode, cause the problem that B pump shut down.
In order to achieve the purpose of the invention, the utility model adopts the technical scheme that: an accident button control wiring circuit of a one-to-two variable frequency motor comprises an accident button control wiring in an A pump power frequency power switch cabinet and an accident button control wiring in a variable frequency power switch cabinet;
accident button control connection includes A pump accident trip button, B pump accident trip button, contactor auxiliary contact QF4, contactor auxiliary contact QF5 and QF circuit breaker control box, the direct current power supply is anodal all connected to 3 of A pump accident trip button's 3 ends and B pump accident trip button's 3 ends, the one end of contactor auxiliary contact QF4 is connected to 4 of A pump accident trip button, the one end of contactor auxiliary contact QF5 is connected to 4 of B pump accident trip button, the one end of contactor auxiliary contact QF 4's the other end and the other end of contactor auxiliary contact QF5 all connect the one end of QF circuit breaker control box, the direct current power supply negative pole is connected to the other end of QF circuit breaker control box.
Further: accident button control wiring in the A pump power frequency switch cabinet comprises an A pump accident trip button and a QFA circuit breaker operation box, wherein the 1 end of the A pump accident trip button is connected with the positive electrode of a direct current power supply, the 2 end of the A pump accident trip button is connected with one end of the QFA circuit breaker operation box, and the other end of the QFA circuit breaker operation box is connected with the negative electrode of the direct current power supply.
Further: one end of the auxiliary contact QF4 of the contactor is connected with the pump A, and the other end of the auxiliary contact QF4 of the contactor is connected with the frequency conversion device.
Further: one end of the auxiliary contact QF5 of the contactor is connected with the pump B, and the other end of the auxiliary contact QF5 of the contactor is connected with the frequency conversion device.
Further: and the frequency conversion device is connected with the QF circuit breaker operation box.
Further: one end of the auxiliary contact QF5 of the contactor is also connected with the operation box of the QFB breaker.
The utility model has the advantages that: auxiliary contacts QF4 and QF5 of the contactor in the frequency converter are connected in series into an emergency stop loop, so that the power supply of the frequency converter cannot be cut off under the working frequency failure condition of an A pump. The working condition that the condensate pump can operate at the working frequency of 1 pump and operate at the variable frequency of 1 pump is ensured.
Drawings
FIG. 1 is a first wiring diagram of a condensate pump one-drive-two variable frequency motor;
FIG. 2 is a diagram of a conventional crash button control connection;
fig. 3 is the control wiring diagram of the middle accident button of the utility model.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
An accident button control wiring circuit of a one-to-two variable frequency motor comprises an accident button control wiring in an A pump power frequency power switch cabinet and an accident button control wiring in a variable frequency power switch cabinet;
as shown in fig. 3(B), the accident button control wiring in the variable frequency power switch cabinet comprises an a pump accident trip button, a B pump accident trip button, a contactor auxiliary contact QF4, a contactor auxiliary contact QF5 and a QF circuit breaker operation box, wherein the 3 end of the a pump accident trip button and the 3 end of the B pump accident trip button are both connected with the positive electrode of a direct current power supply, the 4 end of the a pump accident trip button is connected with one end of a contactor auxiliary contact QF4, the 4 end of the B pump accident trip button is connected with one end of a contactor auxiliary contact QF5, the other end of the contactor auxiliary contact QF4 and the other end of the contactor auxiliary contact QF5 are both connected with one end of the QF circuit breaker operation box, and the other end of the QF circuit breaker operation box is connected with the negative electrode of the direct current power supply.
As shown in fig. 3(a), the accident button control wiring in the a pump power frequency switch cabinet comprises an a pump accident trip button and a QFA circuit breaker operation box, wherein the 1 end of the a pump accident trip button is connected with the positive electrode of a direct current power supply, the 2 end of the a pump accident trip button is connected with one end of the QFA circuit breaker operation box, and the other end of the QFA circuit breaker operation box is connected with the negative electrode of the direct current power supply.
In one embodiment of the present invention, one end of the auxiliary contact QF4 of the contactor is connected to the a pump, and the other end of the auxiliary contact QF4 of the contactor is connected to the frequency conversion device.
In one embodiment of the present invention, one end of the auxiliary contact QF5 of the contactor is connected to the B pump, and the other end of the auxiliary contact QF5 of the contactor is connected to the frequency conversion device.
In an embodiment of the present invention, the frequency conversion device is connected to the QF circuit breaker operation box.
In one embodiment of the present invention, one end of the auxiliary contact QF5 of the contactor is further connected to the QFB circuit breaker operating box.
The utility model discloses with the contactor auxiliary contact QF4/QF5 cluster in the converter scram return circuit to can not cut off the converter power under the A pump power failure condition frequently. After the wiring is modified, the working conditions that the condensate pump can operate at the working frequency of 1 pump and operate at the variable frequency of 1 pump are ensured.
Claims (6)
1. An accident button control wiring circuit of a one-driving-two variable frequency motor is characterized by comprising an accident button control wiring in an A pump power frequency power switch cabinet and an accident button control wiring in a variable frequency power switch cabinet;
accident button control connection includes A pump accident trip button, B pump accident trip button, contactor auxiliary contact QF4, contactor auxiliary contact QF5 and QF circuit breaker control box, the direct current power supply is anodal all connected to 3 of A pump accident trip button's 3 ends and B pump accident trip button's 3 ends, the one end of contactor auxiliary contact QF4 is connected to 4 of A pump accident trip button, the one end of contactor auxiliary contact QF5 is connected to 4 of B pump accident trip button, the one end of contactor auxiliary contact QF 4's the other end and the other end of contactor auxiliary contact QF5 all connect the one end of QF circuit breaker control box, the direct current power supply negative pole is connected to the other end of QF circuit breaker control box.
2. The one-drive-two variable frequency motor accident button control wiring circuit according to claim 1, wherein the accident button control wiring in the A pump power switch cabinet comprises an A pump accident trip button and a QFA circuit breaker operation box, wherein a 1 end of the A pump accident trip button is connected with a positive electrode of a direct current power supply, a 2 end of the A pump accident trip button is connected with one end of the QFA circuit breaker operation box, and the other end of the QFA circuit breaker operation box is connected with a negative electrode of the direct current power supply.
3. The accident button control wiring circuit for one-drive-two inverter motors as claimed in claim 1, wherein one end of the contactor auxiliary contact QF4 is connected to the a pump, and the other end of the contactor auxiliary contact QF4 is connected to the inverter device.
4. The accident button control wiring circuit for one-drive-two inverter motors as claimed in claim 3, wherein one end of the contactor auxiliary contact QF5 is connected to the B pump, and the other end of the contactor auxiliary contact QF5 is connected to the inverter device.
5. The one-drive-two variable frequency motor accident button control wiring circuit of claim 4, wherein the variable frequency device is connected with a QF circuit breaker operation box.
6. The one-drive-two variable frequency motor accident button control wiring circuit as claimed in claim 1, wherein one end of the contactor auxiliary contact QF5 is further connected with a QFB circuit breaker operation box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120301399.2U CN214464821U (en) | 2021-02-02 | 2021-02-02 | One-to-two variable frequency motor accident button control wiring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120301399.2U CN214464821U (en) | 2021-02-02 | 2021-02-02 | One-to-two variable frequency motor accident button control wiring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214464821U true CN214464821U (en) | 2021-10-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120301399.2U Active CN214464821U (en) | 2021-02-02 | 2021-02-02 | One-to-two variable frequency motor accident button control wiring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214464821U (en) |
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2021
- 2021-02-02 CN CN202120301399.2U patent/CN214464821U/en active Active
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