CN208369207U - Portable simple microcomputer protecting device for supplying power allocation network end-point - Google Patents
Portable simple microcomputer protecting device for supplying power allocation network end-point Download PDFInfo
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- CN208369207U CN208369207U CN201820973191.3U CN201820973191U CN208369207U CN 208369207 U CN208369207 U CN 208369207U CN 201820973191 U CN201820973191 U CN 201820973191U CN 208369207 U CN208369207 U CN 208369207U
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- current
- sample connection
- current transformer
- transmission interface
- supplying power
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Abstract
The utility model provides a kind of portable simple microcomputer protecting device for supplying power allocation network end-point, including a work box and the current transformer being connected between three phase mains and load；The work box includes a computer processor and a computer processor power input control switch；The breaker is connected between three phase mains and load；The computer processor includes three-phase current sample connection, information transmission interface, control signal transmission interface, power interface；The information transmission interface connection communication network；The control signal transmission interface connects the control switch.Record fault current can be realized using the technical program, effectively assists in fault coverage, improve malfunction elimination efficiency.
Description
Technical field
The utility model relates to Microcomputer Protection field, in particular to a kind of portable letters for supplying power allocation network end-point
Easy microcomputer protecting device.
Background technique
At present in 10kV supplying power allocation network, from the aspect of cost of investment, maintenance convenience, some 10kV feeder switches
Unit is usually to use high-tension fuse as short circuit current error protection.Mainly there are following three reasons: (1) occurring single-phase
When ground fault, possible Geological Reasons cause impedance ground big, and switch trip current setting is not achieved in fault current.(2) exist
Distribution power supply end fault, is influenced, it is whole that switch trip electric current is not achieved in fault current by power supply line's length, section, impedance
Definite value.(3) switch, cable do not press standard configuration matching, and big switch matches small cable, and switch trip current setting is big, so that
Switch can not trip when failure.Cause for these reasons can not timely disengagement failure, serious consequence, distribution transformer must be caused
The operation temperature rise of device long term overloading causes overstepping, low-pressure side imbalance of three-phase voltage can not normal electricity consumption, short dot fever
Cause fire.An accurate short-circuit current value can not be recorded when High-voltage Fuse Blow, and can not monitor load current in real time
Situation.So accident analysis lacks failure if High-voltage Fuse Blow phenomenon occurs again and again for a 10kV feeder switch unit
This accurate foundation of electric current, can not accurately determine failure cause.
In 0.4kV power supply system, since voltage is low, electric current is big, running environment is complicated, it usually will appear soft fault, by
There are the reasons such as foreign matter that low-voltage circuit breaker is caused to trip again and again in broken, overhead line outside temperature rise, humidity, cable, operator to scene
It can restore power transmission again, in this way scene rush to repair personnel can be caused to judge by accident.There are emergency repair times for low voltage failure repairing tightly, equipment
Multiplicity, the problems such as concealment is strong, in addition low tension switch can not record the low precision of accurate fault curre, protection, cause difficulty
To judge fault type, it is difficult thoroughly to solve this soft fault.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiencies in the prior art, provide a kind of for supplying power allocation network
The portable simple microcomputer protecting device of end notes down fault current, effectively assists in fault coverage, improves malfunction elimination effect
Rate.
In order to solve the above-mentioned technical problem, the utility model provides a kind of for the portable of supplying power allocation network end-point
Simple microcomputer protecting device, including a work box and the current transformer being connected between three phase mains and load；The work
Box includes a computer processor and a computer processor power input control switch；The control switch be connected to three phase mains with
Between load；The computer processor includes three-phase current sample connection, information transmission interface, control signal transmission interface, electricity
Source interface；The three-phase current sample connection connects the current transformer；The information transmission interface connection communication network is used
Current information is analyzed in real time monitoring；The control signal transmission interface connects the control switch；The power interface connection
Power supply unit.
In a preferred embodiment, the current transformer includes the first current transformer, the second current transformer, the
Three current transformers are connected between three phase mains and load.
In a preferred embodiment, the three-phase current sample connection include the first sample connection, the second sample connection,
Third sample connection；First current transformer, the second current transformer, third current transformer include input side and defeated
Side out；The both ends of the input side are separately connected the three phase mains and load, and one end of the outlet side is separately connected described
First sample connection, the second sample connection, third sample connection, the other end of the outlet side are grounded.
In a preferred embodiment, control switch is specially air switch；The computer processor judges described first
The current information that sample connection, the second sample connection, third sample connection sample, if detecting, electric current is more than predetermined electricity
Stream, the computer processor send a control signal to the air switch from the control signal transmission interface, and the air is opened
The connection with three phase mains is opened in shutdown.
In a preferred embodiment, the communication network is specially 485 Network Interface Modules.
In a preferred embodiment, the communication network is specially 485 Network Interface Modules.
Compared to the prior art, the technical solution of the utility model have it is following the utility model has the advantages that
1. the utility model provides a kind of portable simple microcomputer protecting device for supplying power allocation network end-point, it is used for
In 10kV switch unit, the power load and fault current of the switch unit can be monitored in real time, and can temporarily be used as the switch
The protection act element of unit and in the event of a failure, cuts off the power in time.
2. the utility model provides a kind of portable simple microcomputer protecting device for supplying power allocation network end-point, it is used for
0.4kV is fed out in switch unit, can detect low-voltage short-circuiting fault current, can be recorded according to electric current and be determined low voltage failure type,
Determination is switch fault, cable fault or overhead transmission line failure, effectively assists in fault coverage, improves malfunction elimination effect
Rate；And current failure can be cut off in time temporarily as the protection act element of the switch and in the event of a failure.
Detailed description of the invention
Fig. 1 is to fill in the preferred embodiment in the utility model for the portable simple Microcomputer Protection of supplying power allocation network end-point
Circuits schematic diagram.
Specific embodiment
The utility model is described further below in conjunction with the drawings and specific embodiments.
A kind of portable simple microcomputer protecting device for supplying power allocation network end-point, with reference to Fig. 1, including a work box
And it is connected to the current transformer between three phase mains and load；The work box includes that the control of a computer processor F3 and one is opened
It closes, the control switch is connected between three phase mains and load, and when generation electric fault, control switch then be will disconnect and three
The connection of phase power supply, to cut off the power supply of load；The computer processor F3 include three-phase current sample connection, information transmission connect
Mouth, control signal transmission interface A4, A5, power interface A1, A2；The three-phase current sample connection connects the Current Mutual Inductance
Device；The information transmission interface connection communication network, the communication network are specially 485 Network Interface Modules, for supervising in real time
Control analysis current information；Described control signal transmission interface A4, A5 connect the control switch；Described power interface A1, A2 connect
Connect power supply unit.The computer processor F3 that the present embodiment uses is specially SepamS43 Microcomputer Protection device, can also use other
Processor replaces, and belongs to simple replacement, protection scope of this utility model cannot be limited by this.
Specifically, the connection relationship of the current transformer and the computer processor F3 is described below: due to power supply
For three phase mains, so the current transformer includes that the first current transformer TA, the second current transformer TB, third electric current are mutual
Sensor TC, and be connected between three phase mains and load.The three-phase current sample connection includes the first sample connection
B4, the second sample connection B5, third sample connection B6；The first current transformer TA, the second current transformer TB, third electricity
Current transformer TC includes input side and outlet side；The both ends of the input side are separately connected the three phase mains and load, institute
The one end for stating outlet side is separately connected the first sample connection B4, the second sample connection B5, third sample connection B6, described defeated
The other end of side is grounded out.
In the present embodiment, control switch is specially air switch, and specifically, the air switch is circuit breaker Q L；
Other air switches can also be used to substitute, belong to simple replacement, protection scope of this utility model cannot be limited by this.It is described
Computer processor F3 judges the electricity that the first sample connection B4, the second sample connection B5, third sample connection B6 are sampled
Stream information, if detect electric current be more than scheduled current, the computer processor F3 can from the control signal transmission interface A4,
A5 sends a control signal to the circuit breaker Q L, and the circuit breaker Q L is just disconnected and the connection of three phase mains, to protect load.
The utility model provides a kind of portable simple microcomputer protecting device for supplying power allocation network end-point, is used for
In 10kV switch unit, the power load and fault current of the switch unit can be monitored in real time by 485 Network Interface Modules, also
Circuit breaker Q L can be controlled by computer processor F3 to disconnect load and the connection of three phase mains in time, protection loads in time,
It is temporarily a selection well as the protection act element of the switch unit, in the event of a failure, can cuts off the power in time.
When being fed out in switch unit for 0.4kV, due to the factors such as voltage is low, electric current is big, running environment is complicated, usually will appear soft
Failure；And it also will cause low tension switch due to breaking outside heating, humidity, cable, overhead line has foreign matter etc. to trip again and again；It is low
Breakdown repair is pressed there are emergency repair times the problems such as tight, equipment is various, concealment is strong, using provided by the utility model for matching
The portable simple microcomputer protecting device of net supply network end can accomplish detection low-voltage short-circuiting fault current, can be according to electricity
Stream record determines low voltage failure type, and determination is switch fault, cable fault or overhead transmission line failure, effectively assists in event
Hinder range, improves malfunction elimination efficiency；And it can temporarily as the protection act element of the switch and in the event of a failure, in time
Cut off current failure.
The preferable specific embodiment of the above, only the utility model, but the design concept of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, utilizes this design
The change that unsubstantiality is carried out to the utility model belongs to the behavior for invading scope of protection of the utility model.
Claims (5)
1. a kind of portable simple microcomputer protecting device for supplying power allocation network end-point, it is characterised in that including a work box
And it is connected to the current transformer between three phase mains and load；The work box includes a computer processor and a MICROCOMPUTER PROCESSING
Device power input control switch, the control switch are connected between three phase mains and load；The computer processor includes three
Phase current sample connection, information transmission interface, control signal transmission interface, power interface；The three-phase current sample connection connects
Connect the current transformer；The information transmission interface connection communication network, for monitoring analysis current information in real time；The control
Signal transmission interface processed connects the control switch；The power interface connects power supply unit.
2. the portable simple microcomputer protecting device according to claim 1 for supplying power allocation network end-point, feature
It is, the current transformer includes the first current transformer, the second current transformer, third current transformer, is separately connected
Between three phase mains and load.
3. the portable simple microcomputer protecting device according to claim 2 for supplying power allocation network end-point, feature
It is, the three-phase current sample connection includes the first sample connection, the second sample connection, third sample connection；Described first
Current transformer, the second current transformer, third current transformer include input side and outlet side；The both ends of the input side
It is separately connected the three phase mains and load, one end of the outlet side is separately connected first sample connection, the second sampling
Interface, third sample connection, the other end of the outlet side are grounded.
4. the portable simple microcomputer protecting device according to claim 3 for supplying power allocation network end-point, feature
It is, control switch is specially air switch；The computer processor judge first sample connection, the second sample connection,
The current information that third sample connection samples, if detecting, electric current is more than scheduled current, and the computer processor is described in
Control signal transmission interface sends a control signal to the air switch, and the air switch disconnects the connection with three phase mains.
5. the portable simple microcomputer protecting device according to claim 1 for supplying power allocation network end-point, feature
It is, the communication network is specially 485 Network Interface Modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820973191.3U CN208369207U (en) | 2018-06-22 | 2018-06-22 | Portable simple microcomputer protecting device for supplying power allocation network end-point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820973191.3U CN208369207U (en) | 2018-06-22 | 2018-06-22 | Portable simple microcomputer protecting device for supplying power allocation network end-point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208369207U true CN208369207U (en) | 2019-01-11 |
Family
ID=64926241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820973191.3U Active CN208369207U (en) | 2018-06-22 | 2018-06-22 | Portable simple microcomputer protecting device for supplying power allocation network end-point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208369207U (en) |
-
2018
- 2018-06-22 CN CN201820973191.3U patent/CN208369207U/en active Active
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