CN206650578U - Distribution line failure simulation system power supply circuit - Google Patents
Distribution line failure simulation system power supply circuit Download PDFInfo
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- CN206650578U CN206650578U CN201720341038.4U CN201720341038U CN206650578U CN 206650578 U CN206650578 U CN 206650578U CN 201720341038 U CN201720341038 U CN 201720341038U CN 206650578 U CN206650578 U CN 206650578U
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- power supply
- mains
- commutation bridge
- time relay
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Abstract
A kind of distribution line failure simulation system power supply circuit, is related to technical field of power systems, and what is solved is to the technical problem of power surges when reducing upper electric.The circuit includes three phase mains, exchange time relay, three-phase ac contactor, three-phase commutation bridge；The control coil of the exchange time relay is connected to the uniline in three phase mains, and the control coil of three-phase ac contactor is connected to the uniline in three phase mains by the contact of sound all the way of exchange time relay；The output of the three-phase commutation bridge is terminated with filter capacitor；The three-phase input end of three-phase commutation bridge is respectively coupled with the three-phase firewire of three phase mains through a negative tempperature coefficient thermistor, and respectively the contact of sound all the way through three-phase ac contactor is coupled with the three-phase firewire of three phase mains to the three-phase input end of three-phase commutation bridge.Circuit provided by the utility model, low is required to power supply capacity.
Description
Technical field
Power system technology is the utility model is related to, more particularly to a kind of distribution line failure simulation system power supply circuit
Technology.
Background technology
In recent years, distribution automation is developed rapidly, the indicating fault as power distribution automation important component
Device obtains large-scale application, to ensure product quality, it is necessary to right in laboratory environments by distribution line failure simulation system
Fault detector is tested.Because distribution line failure simulation system needs the distribution line at the scene of simulating, its electric current is very big,
Need to be powered using large power supply, to power supply capacity require it is higher, and the impact in system electrification to power supply compared with
Greatly, easily cause to be spaced apart tripping operation, influence the normal work in laboratory.
Utility model content
For defect present in above-mentioned prior art, technical problem to be solved in the utility model is to provide a germline
Impact when electric on system to power supply is small, and requires low distribution line failure simulation system power supply circuit to power supply capacity.
In order to solve the above-mentioned technical problem, a kind of distribution line failure simulation system power supply electricity provided by the utility model
Road, it is characterised in that：Including three phase mains, exchange time relay, three-phase ac contactor, three-phase commutation bridge；
The control coil of the exchange time relay is connected to the uniline in three phase mains, three-phase ac contactor
Control coil is connected to the uniline in three phase mains by the contact of sound all the way of exchange time relay；
The output of the three-phase commutation bridge is terminated with filter capacitor；The three-phase input end of three-phase commutation bridge is respectively through a negative temperature
Coefficient resistance is coupled with the three-phase firewire of three phase mains, and the three-phase input end of three-phase commutation bridge is respectively through three-phase alternating current
The contact of sound all the way of contactor is coupled with the three-phase firewire of three phase mains.
Distribution line failure simulation system power supply circuit provided by the utility model, adopt the Surge suppression that has access to electricity, delay side
The measures such as road, three phase rectifier, impact when can avoid initial power-on by negative tempperature coefficient thermistor to power supply, and handing over
Under the cooperation for flowing the time relay, three-phase ac contactor, normal operation mode can be automatically switched to after working stability, is had
Impact during system electrification to power supply is small, and requires the characteristics of low to power supply capacity.
Brief description of the drawings
Fig. 1 is the circuit diagram of the distribution line failure simulation system power supply circuit of the utility model embodiment.
Embodiment
Embodiment of the present utility model is described in further detail below in conjunction with brief description of the drawings, but the present embodiment and not had to
It is every to use similar structure of the present utility model and its similar change in limitation the utility model, the utility model all should be included in
Protection domain, the pause mark in the utility model represents the relation of sum.
As shown in figure 1, a kind of distribution line failure simulation system power supply circuit that the utility model embodiment is provided, its
It is characterised by：Including three phase mains, exchange time relay JD1, three-phase ac contactor JD2, three-phase commutation bridge D1；
The control coil of the exchange time relay JD1 is connected to the uniline in three phase mains, three-phase alternating current contact
Device JD2 control coil is connected to the uniline in three phase mains by the exchange time relay JD1 contact of sound all the way；
The output of the three-phase commutation bridge D1 is terminated with filter capacitor C1；Three-phase commutation bridge D1 three-phase input end is respectively through one
Negative tempperature coefficient thermistor（RT1、RT2、RT3）Three-phase firewire Ua, Ub, Uc of three phase mains are coupled with, and three-phase is whole
Respectively the contact of sound all the way through three-phase ac contactor JD2 is coupled with the three-phase fire of three phase mains to stream bridge D1 three-phase input end
Line Ua, Ub, Uc.
The operation principle of the utility model embodiment is as follows：
During initial power-on, exchange time relay JD1 control coil obtain it is electric, due to prolonging for exchange time relay JD1
Shi Zuoyong, three phase mains first pass through powerful negative tempperature coefficient thermistor RT1, RT2, RT3, and three-phase commutation bridge D1 to filter
Ripple electric capacity C1 charges, due to the characteristic of negative tempperature coefficient thermistor, its in low temperature with certain resistance value, so as to limit
Upper electric surge current, with self-heating, resistance value reduces, itself is not burned so as to protect, is held according to laboratory power supply
Amount needs to select the negative tempperature coefficient thermistor of suitable resistance, can be by upper electric surge current limitation within the acceptable range；
After exchange time relay JD1 delay times arrive, the sound contact closure of exchange time relay, by alternating current
It is applied on three-phase ac contactor JD2 control coil, so that three tunnel sound contact closures of three-phase ac contactor, this
When distribution line failure simulation system enter normal operating condition, according to negative tempperature coefficient thermistor, filter capacitor selection close
Suitable delay time constant, it is ensured that when the time relay acts, filter capacitor fills with, so as to avoid the impact to power supply.
The power supply of distribution line failure simulation system is directly derived from filter capacitor C1 both ends, because high power three-phase is whole
Stream, super capacitor filtering, the output of its dc source is stable, and can meet system power needs.
Claims (1)
- A kind of 1. distribution line failure simulation system power supply circuit, it is characterised in that：Including three phase mains, exchange time relay Device, three-phase ac contactor, three-phase commutation bridge；The control coil of the exchange time relay is connected to the uniline in three phase mains, the control of three-phase ac contactor Coil is connected to the uniline in three phase mains by the contact of sound all the way of exchange time relay；The output of the three-phase commutation bridge is terminated with filter capacitor；The three-phase input end of three-phase commutation bridge is respectively through a negative temperature coefficient Thermistor is coupled with the three-phase firewire of three phase mains, and the three-phase input end of three-phase commutation bridge respectively contacts through three-phase alternating current The contact of sound all the way of device is coupled with the three-phase firewire of three phase mains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720341038.4U CN206650578U (en) | 2017-04-01 | 2017-04-01 | Distribution line failure simulation system power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720341038.4U CN206650578U (en) | 2017-04-01 | 2017-04-01 | Distribution line failure simulation system power supply circuit |
Publications (1)
| Publication Number | Publication Date |
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| CN206650578U true CN206650578U (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720341038.4U Active CN206650578U (en) | 2017-04-01 | 2017-04-01 | Distribution line failure simulation system power supply circuit |
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| CN (1) | CN206650578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921286A (en) * | 2017-04-01 | 2017-07-04 | 上海紫通信息科技有限公司 | Distribution line failure simulation system power supply circuit |
-
2017
- 2017-04-01 CN CN201720341038.4U patent/CN206650578U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921286A (en) * | 2017-04-01 | 2017-07-04 | 上海紫通信息科技有限公司 | Distribution line failure simulation system power supply circuit |
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