CN217115618U - Emergency diesel generator and wiring circuit thereof - Google Patents
Emergency diesel generator and wiring circuit thereof Download PDFInfo
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- CN217115618U CN217115618U CN202220850488.7U CN202220850488U CN217115618U CN 217115618 U CN217115618 U CN 217115618U CN 202220850488 U CN202220850488 U CN 202220850488U CN 217115618 U CN217115618 U CN 217115618U
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- diesel generator
- emergency
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- electrically connected
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Abstract
The invention provides an emergency diesel generator and a wiring circuit thereof, wherein the wiring circuit comprises a diesel generator bus, an emergency bus, a power transformer, a communication switch, an outlet switch and an inlet switch; the diesel generator bus is electrically connected with the emergency diesel generator through the outlet switch; the emergency bus is electrically connected with the power transformer through the incoming line switch, and the emergency bus is also electrically connected with the diesel generator bus through the interconnection switch; the neutral points of the emergency diesel generator and the power transformer are electrically connected to the same grounding terminal. By electrically connecting the neutral points of the diesel generator and the power transformer to the same grounding end, stray current caused by unbalanced power supply parameters is effectively reduced; stray current caused by unbalanced load parameters is effectively reduced; the faults of the protection device caused by stray current are effectively reduced, and the safe and reliable operation of the emergency diesel generator is ensured.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, concretely relates to emergent diesel generator and wiring circuit thereof.
Background
Emergent diesel generating set is TN ground system, piles down all direct ground connection in low pressure side neutral point at generator neutral point and emergency bus upstream, and the main problem that this ground connection scheme exists is: during the grid-connected test of the emergency diesel generator set, the upper-stream stack of the emergency bus is directly grounded to the low-voltage side neutral point, and the neutral point of the emergency diesel generator is directly grounded to cause two points of the system to be grounded. The system does not meet the IEC and national standard one-point grounding requirements, and stray current can be generated under certain conditions, so that the normal operation of the system is influenced.
SUMMERY OF THE UTILITY MODEL
The present disclosure is directed to at least one of the technical problems of the prior art, and provides an emergency diesel generator and a wiring circuit thereof.
In one aspect of the disclosure, an emergency diesel generator wiring circuit is provided, which includes a diesel generator bus, an emergency bus, a power transformer, a tie switch, an outlet switch and an inlet switch;
the diesel generator bus is electrically connected with the emergency diesel generator through the outlet switch;
the emergency bus is electrically connected with the power transformer through the incoming line switch, and the emergency bus is also electrically connected with the diesel generator bus through the interconnection switch;
the neutral points of the diesel generator and the power transformer are electrically connected to the same ground terminal.
In some embodiments, the diesel-generator bus comprises a first phase line, a first neutral line, and a first ground line; the emergency bus comprises a second phase line, a second zero line and a second ground wire;
the first phase line is electrically connected with the emergency diesel generator through the outlet switch, and the first zero line and the first ground line are electrically connected with a neutral point of the emergency diesel generator;
the second phase line is electrically connected with the power transformer through the incoming switch, the second phase line is also electrically connected with the first phase line through the interconnection switch, and the second zero line and the second ground wire are electrically connected with a neutral point of the power transformer;
the first zero line and the second zero line are also electrically connected to the same ground terminal.
In some embodiments, the first phase line is a multi-phase line and the second phase line is a multi-phase line.
In some embodiments, the first phase line is a three-phase line and the second phase line is a three-phase line.
In some embodiments, at least one of the tie switch, the egress switch, and the ingress switch employs a circuit breaker.
In some embodiments, the ground terminal is disposed within an emergency switchboard.
In some embodiments, the neutral point of the power transformer is located on the low voltage side of the power transformer.
In some embodiments, the neutral point of the emergency diesel generator is located on the power generation inlet side of the emergency diesel generator.
In another aspect of the present disclosure, an emergency diesel generator is provided, comprising the wiring circuit described above.
According to the emergency diesel generator and the wiring circuit thereof, the neutral points of the diesel generator and the power transformer are electrically connected to the same grounding terminal, so that stray current caused by unbalanced power supply parameters is effectively reduced; stray current caused by unbalanced load parameters is effectively reduced; the faults of the protection device caused by stray current are effectively reduced, and the safe and reliable operation of the emergency diesel generator is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an emergency diesel generator connection circuit according to an embodiment of the present disclosure.
Detailed Description
For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
As shown in fig. 1, the disclosed embodiment relates to an emergency diesel generator wiring circuit, which includes a diesel generator bus 110, an emergency bus 120, a power transformer 130, a tie switch 140, an outlet switch 150, and an inlet switch 160. The diesel generator bus 110 is electrically connected to the emergency diesel generator 200 through the outlet switch 150. The emergency bus 120 is electrically connected with the power transformer 130 through the incoming switch 160, and the emergency bus 120 is also electrically connected with the diesel generator bus 110 through the interconnection switch 140. The neutral points of the diesel generator 200 and the power transformer 130 are electrically connected to the same ground GND.
According to the emergency diesel generator wiring circuit, the neutral points of the diesel generator and the power transformer are electrically connected to the same grounding terminal, so that stray current caused by unbalanced power supply parameters is effectively reduced; stray current caused by unbalanced load parameters is effectively reduced; the faults of the protection device caused by stray current are effectively reduced, and the safe and reliable operation of the emergency diesel generator is ensured.
Illustratively, as shown in FIG. 1, the diesel generator bus 110 includes a first phase line (L) 1 、L 2 And L 3 ) A first neutral wire N and a first ground wire PE, i.e. the first phase wire is a three-phase wire. The emergency bus comprises a second phase line (L) 1 ’、L 2 ' and L 3 '), a second neutral wire N ' and a second ground wire PE ', i.e. the second phase wire is a three-phase wire.
In particular, as shown in fig. 1, the first phase line (L) 1 、L 2 And L 3 ) The outlet switch 150 is electrically connected with the emergency diesel generator 200, and the first zero line N and the first ground line PE are electrically connected with a neutral point of the emergency diesel generator 200. The second phase line (L) 1 ’、L 2 ' and L 3 ') is electrically connected to the power transformer 130 through the incoming switch 160, the second phase line (L) 1 ’、L 2 ' and L 3 ') is also connected to the first phase line (L) via the interconnection switch 140 1 、L 2 And L 3 ) And the second neutral wire N 'and the second ground wire PE' are electrically connected with a neutral point of the power transformer 130. The first zero line N and the second zero line N' are also electrically connected to the same ground terminal GND.
It should be noted that the first phase line and the second phase line are not limited to the three phase lines shown in fig. 1, and those skilled in the art may also design some other number of phase lines according to actual needs, for example, single phase, two phase, etc., and the embodiment is not limited thereto.
Illustratively, as shown in fig. 1, the tie switch 140, the exit switch 150, and the incoming switch 160 employ circuit breakers. In an embodiment, the type of the circuit breaker of the outlet switch 150 may be a 4P type, before the circuit breaker is not switched on, the emergency diesel generator 200 will be in an operation mode in which the neutral point is not grounded, the original single-phase ground protection of the emergency diesel generator will fail, and in order to avoid this, both ends of the N phase of the 4P circuit breaker are shorted by a copper bar, so that the first ground line PE and the neutral point of the emergency diesel generator 200 can be electrically connected, and the ground protection is realized. In another embodiment, the outlet switch 150 may also be directly implemented by a 3P-type circuit breaker, so that the first ground PE is directly electrically connected to the neutral point of the emergency diesel generator 200, thereby achieving ground protection.
It should be noted that the specific structures of the interconnection switch, the outlet switch and the inlet switch are not limited to the breaker structure, and those skilled in the art may select or design other switch device structures for implementing the switch function according to the actual needs, which is not limited in this embodiment.
For example, as shown in fig. 1, the ground GND is provided in an emergency switchboard. That is, in the grounding mode in the wiring circuit of the present embodiment, the direct in-situ grounding of the neutral point of the emergency diesel generator and the neutral point of the power transformer is cancelled, and instead, the direct in-situ grounding is performed at one point in the emergency switchboard.
Illustratively, as shown in fig. 1, the neutral point of the power transformer 130 is located on the low-voltage side of the power transformer 130. The neutral point of the emergency diesel generator 200 is located on the power generation inlet side of the emergency diesel generator 200.
In another aspect of the present disclosure, an emergency diesel generator is provided, which includes the wiring circuit 100 described above, and the detailed structure of the wiring circuit can refer to the related descriptions, which are not described herein again.
According to the emergency diesel generator, the diesel generator and the neutral point of the power transformer are electrically connected to the same grounding terminal, so that stray current caused by unbalanced power supply parameters is effectively reduced; stray current caused by unbalanced load parameters is effectively reduced; the faults of the protection device caused by stray current are effectively reduced, and the safe and reliable operation of the emergency diesel generator is ensured.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.
Claims (9)
1. An emergency diesel generator wiring circuit is characterized by comprising a diesel generator bus, an emergency bus, a power transformer, a tie switch, an outlet switch and an inlet switch;
the diesel generator bus is electrically connected with the emergency diesel generator through the outlet switch;
the emergency bus is electrically connected with the power transformer through the incoming line switch, and the emergency bus is also electrically connected with the diesel generator bus through the interconnection switch;
the neutral points of the emergency diesel generator and the power transformer are electrically connected to the same grounding terminal.
2. The wiring circuit of claim 1 wherein said diesel generator bus includes a first phase line, a first neutral line, and a first ground line; the emergency bus comprises a second phase line, a second zero line and a second ground wire;
the first phase line is electrically connected with the emergency diesel generator through the outlet switch, and the first zero line and the first ground line are electrically connected with a neutral point of the emergency diesel generator;
the second phase line is electrically connected with the power transformer through the incoming switch, the second phase line is also electrically connected with the first phase line through the interconnection switch, and the second zero line and the second ground wire are electrically connected with a neutral point of the power transformer;
the first zero line and the second zero line are also electrically connected to the same ground terminal.
3. The wiring circuit of claim 2, wherein the first phase line is a multi-phase line and the second phase line is a multi-phase line.
4. The wiring circuit of claim 3, wherein the first phase line is a three-phase line and the second phase line is a three-phase line.
5. The wiring circuit of any one of claims 1 to 4, wherein at least one of the tie switch, the exit switch and the inlet switch employs a circuit breaker.
6. The wiring circuit of any one of claims 1 to 4, wherein the ground terminal is provided in an emergency switchboard.
7. The wiring circuit of any one of claims 1 to 4, wherein a neutral point of the power transformer is located on a low voltage side of the power transformer.
8. The wiring circuit according to any one of claims 1 to 4, wherein a neutral point of the emergency diesel generator is located on a power generation inlet side of the emergency diesel generator.
9. An emergency diesel generator, characterized in that it comprises a wiring circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220850488.7U CN217115618U (en) | 2022-04-12 | 2022-04-12 | Emergency diesel generator and wiring circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220850488.7U CN217115618U (en) | 2022-04-12 | 2022-04-12 | Emergency diesel generator and wiring circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217115618U true CN217115618U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220850488.7U Active CN217115618U (en) | 2022-04-12 | 2022-04-12 | Emergency diesel generator and wiring circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217115618U (en) |
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2022
- 2022-04-12 CN CN202220850488.7U patent/CN217115618U/en active Active
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