CN103837787B - Electrical power distribution case PE and the alarm method and device of N bus loose contacts - Google Patents
Electrical power distribution case PE and the alarm method and device of N bus loose contacts Download PDFInfo
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- CN103837787B CN103837787B CN201210471079.7A CN201210471079A CN103837787B CN 103837787 B CN103837787 B CN 103837787B CN 201210471079 A CN201210471079 A CN 201210471079A CN 103837787 B CN103837787 B CN 103837787B
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Abstract
The invention discloses a kind of electrical power distribution case PE and the alarm method and device of N bus loose contacts, its method is that the alarm unit both ends in warning device are connected on PE buses and N buses；When PE buses contact good with N buses, alarm unit is not alarmed by PE buses and N busbar short-circuits, alarm unit；When PE buses and the loose contact of N buses or disconnection, the contact resistance between PE buses and N buses increases or tended to infinitely great, and alarm unit starts to alarm after contact resistance exceedes setting value.The method of the present invention is achieved that the monitoring to PE buses and N bus connecting faults, effectively prevents equipment stoppage in transit for a long time and the generation of personnel's electric shock accidents by the way that the warning device of low cost is connected between PE buses and N buses.The apparatus structure of the present invention is simple, easily implements, and implementation cost is low, has the characteristics of economical and practical.
Description
Technical field
The present invention relates to a kind of electrical power distribution case PE and the alarm method and device of N bus loose contacts, belongs to building electricity
Source distribution box low-voltage distribution protection technique field.
Background technology
In electrical installations in buildings low-voltage distribution system, Grounding Types are generally divided into tri- kinds of TN, TT, IT.And TN patterns
In again be divided into tri- kinds of TN-C, TN-C-S, TN-S.TN-C-S earthed systems are more common in building in low-voltage distribution system
Grounding Types.TN-C systems will not occur for TN-C-S systems due to electric unsafe factor caused by device inter potential, can make
Each Information Technology Equipment obtains and interference is reduced than more equal reference potential, and to the anti-common-mode voltage of Information Technology Equipment
TN-C-S systems are better than TN-S systems for interference.
When TN-C systems are converted to TN-C-S systems by IEC standard requirement, protective earthing-neutral conductor is converted into PE lines at electric power incoming line
With N lines.Protective earthing-neutral conductor first connects PE buses, and is grounded, then line N buses.But in some actual engineering projects, protective earthing-neutral conductor is first
N buses are connected to, then is connected to PE buses and is grounded.PE buses are first connect in protective earthing-neutral conductor, then PE buses and N buses are attached
In the case of, when the connecting line loose contact between PE buses and N buses, neutral circuit（N lines）Obstructed, system equipment is run not
Normally, single-phase equipment does not work even；Protective earthing-neutral conductor first be connected with N buses, then when N buses and PE buses are attached, as PE mothers
During connecting line loose contact between line and N buses, then whole system loses the zero connection protection of PE lines, but the equipment in system is still
Can normal work, the failure for losing PE zero connection protections is not easy to be found by people, can form great threat to personal safety.
The content of the invention
It is an object of the present invention to provide a kind of electrical power distribution case PE and the alarm method and device of N bus loose contacts.
When PE lines and N linear contact lays in power supply box are bad, device can timely send alarm.Stopped for a long time with effective prevention apparatus
Fortune and personnel's electric shock accidents.With overcome the deficiencies in the prior art.
Technical scheme：
Electrical power distribution case PE and the alarm method of N bus loose contacts, this method is by the alarm unit in warning device
Both ends are connected on PE buses and N buses；When PE buses contact good with N buses, alarm unit is female by PE buses and N
Line short circuit, alarm unit are not alarmed；When PE buses and the loose contact of N buses or disconnection, the contact between PE buses and N buses
Resistance increases or tended to infinitely great, and alarm unit starts to alarm after contact resistance exceedes setting value.
In preceding method, the alarm unit both ends in the warning device are connected to PE buses through diode respectively and N is female
On line；To eliminate PE buses and influence of the alternating current when loose contact of N buses or disconnection to warning device.
In preceding method, the alarm unit uses sound and light alarm, including voice guard and visual alarm.
In preceding method, the voice guard uses loudspeaker or buzzer or other electric vocalization device parts.
In preceding method, the visual alarm uses red eye or red glittering LED lamp or other electro-illuminators
Part.
The device formed according to preceding method, including alarm unit, alarm unit both ends are connected with dc source E both ends,
Alarm unit both ends are connected with binding post X1 and binding post X2 respectively.
In aforementioned means, the alarm unit is connected through power supply indicator HL1 with dc source E, and dc source E one end is set
There is switch SB.
In aforementioned means, described alarm unit one end is connected with diode D1 positive pole, diode D1 negative pole and wiring
Terminal X1 connections；The alarm unit other end is connected with diode D2 negative pole, and diode D2 positive pole is connected with binding post X2
In aforementioned means, the alarm unit includes voice guard SP and visual alarm HL2.
In aforementioned means, the voice guard SP is loudspeaker or buzzer；The visual alarm HL2 believes to be red
Signal lamp or red glittering LED lamp；The power supply indicator HL1 is greensignal light.
Compared with prior art, method of the invention by the warning device of low cost by being connected to PE buses and N buses
Between, the monitoring to PE buses and N bus connecting faults is achieved that, effectively preventing equipment, stoppage in transit and personnel touch for a long time
The generation of electrification.The apparatus structure of the present invention is simple, easily implements, and implementation cost is low, has the characteristics of economical and practical.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of prior art；
Fig. 3 is that PEN inlet wires first connect the schematic diagram that PE buses reconnect N buses；
Fig. 4 is that PEN inlet wires first connect the schematic diagram that N buses reconnect PE buses.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, but not as any limitation of the invention.
Electrical power distribution case PE and the alarm method of N bus loose contacts, as shown in Figure 1.This method is by warning device
Alarm unit both ends be connected on PE buses and N buses；When PE buses contact good with N buses, alarm unit quilt
PE buses and N busbar short-circuits, alarm unit are not alarmed；When PE buses and the loose contact of N buses or disconnection, PE buses are female with N
Contact resistance between line increases or tended to infinitely great, and alarm unit starts to alarm after contact resistance exceedes setting value.The report
Alarm unit both ends in alarm device are connected on PE buses and N buses through diode respectively；Connect with eliminating PE buses with N buses
Influence of the alternating current to warning device when touching bad or disconnection.The alarm unit uses sound and light alarm, including voice guard
And visual alarm.Voice guard uses loudspeaker or buzzer and other electric vocalization device parts.Visual alarm is using red
Chrominance signal lamp or red glittering LED lamp and other electroluminescence devices.
The device formed according to preceding method, as shown in Figure 1.Including alarm unit, alarm unit both ends and dc source E
Both ends are connected, and alarm unit both ends are connected with binding post X1 and binding post X2 respectively.Alarm unit is through power supply indicator HL1
It is connected with dc source E, power supply indicator HL1 is greensignal light.Dc source E one end is provided with switch SB.Alarm unit one
End is connected with diode D1 positive pole, and diode D1 negative pole is connected with binding post X1；The alarm unit other end and diode
D2 negative pole connection, diode D2 positive pole are connected with binding post X2.The alarm unit includes voice guard SP and lamp
Light crossing-signal HL2.The voice guard SP is loudspeaker or buzzer；The visual alarm HL2 be red eye or
Red glittering LED lamp.
Embodiment
Get out make the element of alarm, and circuit board is made by Fig. 1, by element welding on circuit boards.Make one
Individual box, the panel construction of box as shown in Fig. 2 be provided with panel power supply indicator, alarm lamp and alarming horn and
The mounting hole of switch, and power supply indicator, alarm lamp and alarming horn and switch are fixed on panel, with circuit board
Connect.And two binding posts are fixed on box, inside is connected with circuit board, external connection PE and N bus.
Fig. 3 is the mode of connection figure one when TN-C systems to be converted to TN-C-S systems described in background technology, by Fig. 3
It can be seen that the protective earthing-neutral conductor of electric power incoming line is first to connect PE buses, N buses are then connected to by a section lead again.This connection side
Method is when one section of connecting wire loose contact between PE buses and N buses, neutral circuit（N lines）It is obstructed, system equipment operation
Abnormal, single-phase equipment does not work even.
Fig. 4 is the mode of connection figure two when TN-C systems to be converted to TN-C-S systems described in background technology, by Fig. 4
It can be seen that the protective earthing-neutral conductor of electric power incoming line is first to connect N buses, PE buses are then connected to by a section lead again.This connection side
For method when one section of connecting wire loose contact between PE buses and N buses, then whole system will lose the zero connection protection of PE lines,
But the equipment in system remains to normal work, losing the failure of PE zero connection protections will be not easy to be found by people, but to personal safety meeting
Form great threat.
The present invention is precisely in order to overcome above-mentioned safety problem, the technical scheme of proposition, so as to discovery PE as early as possible
With N bus loose contact situations, handled in time, the generation prevented accident.
The principle of the present invention
The binding post X1 of warning device and binding post X2 are connected on the N buses and PE buses in power supply box respectively.
When contacting good between the PE buses and N buses in power supply box, due to the one-way conduction characteristic of diode, visual alarm HL2
It is shorted, does not work with voice guard SP；When in power supply box PE buses and N buses it is separated when, visual alarm HL2 and
Voice guard SP has electric current by the way that start-up operation sends alarm.Diode D1 and diode D2 in device is in PE and N
Reverse protection is played a part of to device when being disconnected between two buses.
Claims (2)
1. a kind of electrical power distribution case PE and the alarm method of N bus loose contacts, it is characterised in that：This method is by warning device
In alarm unit both ends be connected on PE buses and N buses；When PE buses contact good with N buses, alarm unit
By PE buses and N busbar short-circuits, alarm unit is not alarmed；When PE buses and the loose contact of N buses or disconnection, PE buses and N
Contact resistance between bus increases or tended to infinitely great, and alarm unit starts to alarm after contact resistance exceedes setting value；Alarm
Alarm unit both ends in device are connected on PE buses and N buses through diode respectively；Contacted with eliminating PE buses with N buses
Influence of the alternating current to warning device during bad or disconnection；Alarm unit uses sound and light alarm, including voice guard and light
Alarm；Voice guard uses loudspeaker or buzzer；Visual alarm uses red eye.
2. a kind of device formed according to claim 1 methods described, including alarm unit, it is characterised in that：Alarm unit two
End is connected with dc source E both ends, and alarm unit both ends are connected with binding post X1 and binding post X2 respectively；Alarm unit passes through
Power supply indicator HL1 is connected with dc source E, and dc source E one end is provided with switch SB；Alarm unit one end is with diode D1's
Positive pole is connected, and diode D1 negative pole is connected with binding post X1；The alarm unit other end is connected with diode D2 negative pole, and two
Pole pipe D2 positive pole is connected with binding post X2；Alarm unit includes voice guard SP and visual alarm HL2；Audible alarm
Device SP is loudspeaker or buzzer；The visual alarm HL2 is red eye；The power supply indicator HL1 believes for green
Signal lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210471079.7A CN103837787B (en) | 2012-11-20 | 2012-11-20 | Electrical power distribution case PE and the alarm method and device of N bus loose contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210471079.7A CN103837787B (en) | 2012-11-20 | 2012-11-20 | Electrical power distribution case PE and the alarm method and device of N bus loose contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103837787A CN103837787A (en) | 2014-06-04 |
| CN103837787B true CN103837787B (en) | 2018-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210471079.7A Active CN103837787B (en) | 2012-11-20 | 2012-11-20 | Electrical power distribution case PE and the alarm method and device of N bus loose contacts |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109712843A (en) * | 2017-10-25 | 2019-05-03 | 惠州市沃特科尔电器有限公司 | Water purifier compression refrigerating system device for detecting gas tightness leakage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1477747A (en) * | 2002-07-18 | 2004-02-25 | 施耐德电器工业公司 | Apparatus for monitoring neutral wire and earth wire, and electric switch device containing the same |
| CN1527441A (en) * | 2003-01-30 | 2004-09-08 | 强 邓 | Multifunctional electronic monitoring socket |
| CN2809745Y (en) * | 2004-12-06 | 2006-08-23 | 陈春 | Theft-proof alarm |
| EP1649474B1 (en) * | 2003-07-09 | 2009-10-14 | ISRA-JUK Electronics Ltd | System and method for detection of electrical faults |
| CN202340026U (en) * | 2011-09-27 | 2012-07-18 | 北京煜邦电力技术有限公司 | Power line with automatic short-circuit alarming function |
-
2012
- 2012-11-20 CN CN201210471079.7A patent/CN103837787B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1477747A (en) * | 2002-07-18 | 2004-02-25 | 施耐德电器工业公司 | Apparatus for monitoring neutral wire and earth wire, and electric switch device containing the same |
| CN1527441A (en) * | 2003-01-30 | 2004-09-08 | 强 邓 | Multifunctional electronic monitoring socket |
| EP1649474B1 (en) * | 2003-07-09 | 2009-10-14 | ISRA-JUK Electronics Ltd | System and method for detection of electrical faults |
| CN2809745Y (en) * | 2004-12-06 | 2006-08-23 | 陈春 | Theft-proof alarm |
| CN202340026U (en) * | 2011-09-27 | 2012-07-18 | 北京煜邦电力技术有限公司 | Power line with automatic short-circuit alarming function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103837787A (en) | 2014-06-04 |
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