CN203466738U - Power source circuit of residual current type electrical fire disaster monitor - Google Patents
Power source circuit of residual current type electrical fire disaster monitor Download PDFInfo
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- CN203466738U CN203466738U CN201320546358.5U CN201320546358U CN203466738U CN 203466738 U CN203466738 U CN 203466738U CN 201320546358 U CN201320546358 U CN 201320546358U CN 203466738 U CN203466738 U CN 203466738U
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- transformer
- phase
- rectifier bridge
- bridge stack
- capacitor
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Abstract
The utility model relates to a power source circuit of a residual current type electrical fire disaster monitor. The power source circuit comprises a transformer T1, a transformer T2, a transformer T3, a bridge rectifier B1, a bridge rectifier B2, a bridge rectifier B3, a voltage stabilization chip U1, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor C4, wherein primary sides of the transformer T1, the transformer T2 and the transformer T3 respectively take power from an AN phase, a BN phase and a CN phase on a three-phase four-wire system power supply line, and secondary sides of the transformer T1, the transformer T2 and the transformer T3 are respectively connected with input ends of the bridge rectifier B1, the bridge rectifier B2 and the bridge rectifier B3. Normal power supply for the residual current type electrical fire disaster monitor can further be maintained under deficiency of one phase or two phases of the AN phase, the BN phase and the CN phase on the three-phase four-wire system power supply line, and the power source circuit further has advantages of simple structure and high reliability.
Description
Technical field
The utility model relates to electric fire disaster monitoring field, relates in particular to a kind of power circuit of residual current electric fire monitoring device.
Background technology
According to the statistics of fire department, in national fire incident, electrical fire accounts for 1/3, in electrical fire accident due to low-voltage circuit single phase ground fault, cause the accident and account for 1/2 of electrical fire accident, low-voltage circuit single phase ground fault can show as each phase in low-voltage distributing line (containing the neutral line) current phasor and non-vanishing, and the current phasor of monitored circuit at this moment and be called as residual current claims again excess current or aftercurrent.For fear of the fire incident causing because of residual current, occur, the use of the electrical fire monitor of residual electricity streaming is more and more.
What the power circuit of most residual-current electrical fire monitor adopted is single phase power supply, i.e. AN phase power taking from three-phase four-wire power supply circuit, after a single phase poaer supply transformer pressure-reducing, be input to rectifier bridge and carry out rectification, then the working power that output needs after the voltage stabilizing of linear voltage stabilization chip.Such power circuit is owing to adopting a single phase poaer supply transformer, cause power supply reliability poor, in AN phase dead electricity and BN, CN still have mutually electric in the situation that, this power circuit does not have Voltage-output, residual-current electrical fire monitor cannot be worked or job insecurity.If adopt the such power circuit of three covers the AN phase from three-phase four-wire power supply circuit, BN phase, the power taking of CN phase respectively, the volume of the whole power circuit of formation is larger, and system redundancy is serious.
Utility model content
The technological deficiency that the utility model exists for prior art, the technical problem solving is, the power circuit of the residual-current electrical fire monitor that overcomes current single-phase power taking from three-phase four-wire power supply circuit and cause is unstable, the problem of poor reliability, design while three-phase power taking power circuit of carrying out internal structure integration from three-phase four-wire power supply circuit, can be integrated on a wiring board with residual-current electrical fire monitor, size is less and reliability is high, user-friendly, avoided the probability of residual-current electrical fire monitor cisco unity malfunction.
The utility model is achieved in that a kind of power circuit of residual current electric fire monitoring device, comprises transformer T1, transformer T2, transformer T3, rectifier bridge stack B1, rectifier bridge stack B2, rectifier bridge stack B3, voltage stabilizing chip U1, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, transformer T1, transformer T2, the primary side of transformer T3 is the AN phase from three-phase four-wire power supply circuit respectively, BN phase, the power taking of CN phase, transformer T1, transformer T2, the secondary side of transformer T3 connects respectively rectifier bridge stack B1, rectifier bridge stack B2, the input of rectifier bridge stack B3, rectifier bridge stack B1, rectifier bridge stack B2, the output of rectifier bridge stack B3 is in parallel, output after parallel connection is an anodal DC output end and a ground connection output, capacitor C 1 and capacitor C 3 are connected in parallel between described anodal DC output end and described ground connection output, and voltage stabilizing chip U1 is three terminal regulator, has Input voltage terminal, earth terminal and output voltage terminal, the Input voltage terminal of voltage stabilizing chip U1 is connected with described ground connection output with described anodal DC output end respectively with earth terminal, and capacitor C 2 and C4 are connected in parallel between the output voltage terminal and earth terminal of voltage stabilizing chip U1.Further, rectifier bridge stack B1, rectifier bridge stack B2, rectifier bridge stack B3 are DB107S chip.Further, voltage stabilizing chip U1 is 78L05 chip.Further, the residual current electric fire monitoring device of described power circuit and its power supply is integrated on a circuit board.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of residual current electric fire monitoring device of the utility model;
Fig. 2 is the structural representation of the power circuit of a kind of residual current electric fire monitoring device of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Shown in Figure 1, a kind of residual current electric fire monitoring device, comprises the main frame 1 of residual current electric fire monitoring device and is the power circuit 2 of residual current electric fire monitoring device power supply, and power circuit 2 is connected with main frame 1 thinks that main frame 1 powers.
Shown in Figure 2, the power circuit 2 of described residual current electric fire monitoring device comprises transformer T1, transformer T2, transformer T3, rectifier bridge stack B1, rectifier bridge stack B2, rectifier bridge stack B3, voltage stabilizing chip U1, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, transformer T1, transformer T2, the primary side of transformer T3 is the AN phase from three-phase four-wire power supply circuit respectively, BN phase, the power taking of CN phase, transformer T1, transformer T2, the secondary side of transformer T3 connects respectively rectifier bridge stack B1, rectifier bridge stack B2, the input of rectifier bridge stack B3, rectifier bridge stack B1, rectifier bridge stack B2, the output of rectifier bridge stack B3 is in parallel, output after parallel connection is an anodal DC output end and a ground connection output, capacitor C 1 and capacitor C 3 are connected in parallel between described anodal DC output end and described ground connection output, and voltage stabilizing chip U1 is three terminal regulator, has Input voltage terminal, earth terminal and output voltage terminal, the Input voltage terminal of voltage stabilizing chip U1 is connected with described ground connection output with described anodal DC output end respectively with earth terminal, and capacitor C 2 and C4 are connected in parallel between the output voltage terminal and earth terminal of voltage stabilizing chip U1.Wherein, rectifier bridge stack B1, rectifier bridge stack B2, rectifier bridge stack B3 are DB107S chip, and voltage stabilizing chip U1 is 78L05 chip.Wherein, described power circuit 2 is integrated on a circuit board with the residual current electric fire monitoring device of its power supply.
The utility model is by integrated three transformers on the circuit board at residual current electric fire monitoring device place, with the power taking simultaneously of three-phase from three-phase four-wire power supply circuit, the power supply of realization to residual current electric fire monitoring device, solved and may cause due to the disappearance of a certain phase residual current electric fire monitoring device there is no the technical problem of power supply, avoided the fault that residual current electric fire monitoring device cannot work to occur, for electric wiring and the local operating personnel that are monitored provide strong protective barrier, by structure, be integrated into three cover power supplies simultaneously and removed system redundancy, make whole power circuit size less, for space has been saved in the installation of device.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. a power circuit for residual current electric fire monitoring device, is characterized in that, described power circuit comprises transformer T1, transformer T2, transformer T3, rectifier bridge stack B1, rectifier bridge stack B2, rectifier bridge stack B3, voltage stabilizing chip U1, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, transformer T1, transformer T2, the primary side of transformer T3 is the AN phase from three-phase four-wire power supply circuit respectively, BN phase, the power taking of CN phase, transformer T1, transformer T2, the secondary side of transformer T3 connects respectively rectifier bridge stack B1, rectifier bridge stack B2, the input of rectifier bridge stack B3, rectifier bridge stack B1, rectifier bridge stack B2, the output of rectifier bridge stack B3 is in parallel, output after parallel connection is an anodal DC output end and a ground connection output, capacitor C 1 and capacitor C 3 are connected in parallel between described anodal DC output end and described ground connection output, and voltage stabilizing chip U1 is three terminal regulator, has Input voltage terminal, earth terminal and output voltage terminal, the Input voltage terminal of voltage stabilizing chip U1 is connected with described ground connection output with described anodal DC output end respectively with earth terminal, and capacitor C 2 and C4 are connected in parallel between the output voltage terminal and earth terminal of voltage stabilizing chip U1.
2. power circuit according to claim 1, is characterized in that: rectifier bridge stack B1, rectifier bridge stack B2, rectifier bridge stack B3 are DB107S chip.
3. power circuit according to claim 1, is characterized in that: voltage stabilizing chip U1 is 78L05 chip.
4. power circuit according to claim 1, is characterized in that: the residual current electric fire monitoring device of described power circuit and its power supply is integrated on a circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546358.5U CN203466738U (en) | 2013-09-04 | 2013-09-04 | Power source circuit of residual current type electrical fire disaster monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546358.5U CN203466738U (en) | 2013-09-04 | 2013-09-04 | Power source circuit of residual current type electrical fire disaster monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203466738U true CN203466738U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320546358.5U Expired - Lifetime CN203466738U (en) | 2013-09-04 | 2013-09-04 | Power source circuit of residual current type electrical fire disaster monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203466738U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103144A (en) * | 2014-06-30 | 2014-10-15 | 苏州原点工业设计有限公司 | Residual current electrical fire monitor power supply circuit |
| CN110798081A (en) * | 2019-10-31 | 2020-02-14 | 上海机电工程研究所 | Power supply equipment for ship-borne missile |
| CN113419103A (en) * | 2021-07-29 | 2021-09-21 | 广东电网有限责任公司 | Electrical fire early warning system and method for transformer for station |
-
2013
- 2013-09-04 CN CN201320546358.5U patent/CN203466738U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103144A (en) * | 2014-06-30 | 2014-10-15 | 苏州原点工业设计有限公司 | Residual current electrical fire monitor power supply circuit |
| CN110798081A (en) * | 2019-10-31 | 2020-02-14 | 上海机电工程研究所 | Power supply equipment for ship-borne missile |
| CN113419103A (en) * | 2021-07-29 | 2021-09-21 | 广东电网有限责任公司 | Electrical fire early warning system and method for transformer for station |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140305 |
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| CX01 | Expiry of patent term |