CN207637589U - A kind of transformer cooler control circuit - Google Patents
A kind of transformer cooler control circuit Download PDFInfo
- Publication number
- CN207637589U CN207637589U CN201721521835.7U CN201721521835U CN207637589U CN 207637589 U CN207637589 U CN 207637589U CN 201721521835 U CN201721521835 U CN 201721521835U CN 207637589 U CN207637589 U CN 207637589U
- Authority
- CN
- China
- Prior art keywords
- control circuit
- relay
- auxiliary contact
- control
- cooler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of transformer cooler control circuits; relay is controlled including auxiliary contact, intermediate relay, intermediate relay auxiliary contact and cooler inside relay protection; auxiliary contact and intermediate relay form DC control circuit between being series at DC control busbar inside the relay protection, and the intermediate relay auxiliary contact and cooler control relay are series in AC power and form ac control circuit.The control circuit of the utility model; pass through newly-increased DC control circuit and intermediate relay; originally the transformer number microcomputer protecting device sealed in ac control circuit is removed from ac control circuit; so that protective device is opened is changed into direct current by alternating current; the isolation for realizing power of alterating and direct current truly has ensured the normal table operation of low-voltage direct-current system.
Description
Technical field
The utility model is related to transformer technology field more particularly to a kind of transformer cooler control circuits.
Background technology
Transformer is a kind of static electrical equipment, is identical for the alternating voltage of a certain voltage class is become frequency
The different alternating voltage of another one or more voltage class, be one of the capital equipment in electric system.With load
Increase, the electric current flowed through in transformer winding will increase, since the fuel factor of electric current will be so that in winding and dielectric temperature
It rises, if decreasing insulating will be led to by not limited to Wen Sheng, transformer even forced outage threatens the safety of electric system
Stable operation.
For this purpose, in existing transformer number Microcomputer Protection, it is one of common features, protection philosophy to start cooler
Mainly using load current size as the Protection criteria for starting cooler function, when transformer load electric current reaches setting range
When, start cooler function and implements cooling.Current transformer cooler mostly uses alternating current generator driving, starts cooler function and returns
Road need to take AC power, but remaining is opened into and output circuit and mostly uses DC power supply greatly, thereby results in protective device while connecing
Enter AC power and DC power supply.If plug-in unit, device or terminal block breakdown or personnel in transformer number microcomputer protecting device
Accidentally short circuit alternating current-direct current terminal, may cause AC power scurry into protective device open into or tripping outlet etc. DC loops, in turn
The pernicious consequence of false protection is caused, while influencing entire low-voltage direct-current system operation, causes more false protections, expands accident
Range is the major hidden danger of power system security stable operation.
Therefore existing tranformer protection technology has much room for improvement and develops.
Utility model content
The purpose of this utility model is to provide a kind of transformer cooler that can effectively avoid alternating current-direct current from altering electricity control electricity
Road, with overcome in transformer number microcomputer protecting device AC power may scurry into protective device open into or the direct currents such as tripping outlet
Circuit in turn results in false protection, the problem of influencing the normal operation of entire low-voltage direct-current system institute on-load.
To achieve the above object, the technical solution of the utility model is：
Auxiliary contact, intermediate relay, intermediate relay inside a kind of transformer cooler control circuit, including relay protection
Device auxiliary contact and cooler control relay, and the relay protection inside auxiliary contact and intermediate relay are series at direct current control
DC control circuit is formed between busbar processed, the intermediate relay auxiliary contact and cooler control relay are series at alternating current
Ac control circuit is formed in source.
First, it in DC control circuit, is acted when tranformer protection reaches setting range, is series at DC control and returns
Auxiliary contact will be closed inside relay protection in road, and the subsequent intermediate relay connected in series in DC control circuit will be encouraged
Magnetic.
Then, in ac control circuit, the intermediate relay of intermediate relay auxiliary contact by DC control circuit
Control is closed, and then the cooler control relay connected in series in ac control circuit will be excited, and then start transformation
Device cooler enters operating mode.
The utility model has the beneficial effects that：
By innovatively increasing DC control circuit and intermediate relay, the change that will originally seal in ac control circuit newly
Depressor number microcomputer protecting device is removed from ac control circuit so that and protective device is opened is changed into direct current by alternating current,
The isolation for realizing power of alterating and direct current truly, not only ensure that the normal realization of original control function, but also thoroughly avoid
Occur plug-in unit, device or terminal block breakdown in protective device or personnel miss short circuit alternating current-direct current terminal and AC power is caused to be scurried into
Protective device open into or tripping outlet etc. DC loops, in turn result in the serious consequence of false protection, ensured low-voltage direct system
The normal table of system is run.
Description of the drawings
Fig. 1 is the utility model transformer cooler control circuit block diagram.
Reference sign：Auxiliary contact inside 1- relay protections；2- intermediate relays；3- intermediate relays auxiliary connects
Point；4- coolers control relay；10- DC control circuits；20- ac control circuits.
Specific implementation mode
The content of the utility model is described in further details with reference to the accompanying drawings and detailed description.
Embodiment：
As shown in Figure 1, auxiliary contact 1, intermediate relay inside a kind of transformer cooler control circuit, including relay protection
Device 2, intermediate relay auxiliary contact 3 and cooler control relay 4.Wherein, inside relay protection auxiliary contact 1 and it is intermediate after
Electric appliance 2 is series between DC control busbar by conducting wire and forms DC control circuit (10)；Intermediate relay auxiliary contact 3 and cold
But device control relay 4 is series at formation ac control circuit 20 in AC power by conducting wire.Auxiliary connects inside relay protection
Point 1 is that traditional power cable connects with cooler control relay 4 with intermediate relay 2, intermediate relay auxiliary contact 3
It connects, including connecting terminal and power cable core.
When the work of the utility model, pass through newly-increased DC control circuit 10 and intermediate relay 2, transformer number microcomputer
Protective plug-in unit where protective device starts cooler outlet circuit (auxiliary contact 1 inside relay protection) is opened by former AC power
Again for reconfiguration in DC power supply, it is intermediate relay 2 to output by original cooler control 4 reconfiguration of relay.When transformer is protected
When shield reaches setting range action, being series at auxiliary contact 1 inside the relay protection of DC control circuit 10 will be closed, then
Intermediate relay 2 connected in series in DC control circuit 10 will be excited.At this point, intermediate relay auxiliary contact 3 is in centre
It is closed under the control of relay 2, then the cooler control relay 4 connected in series in ac control circuit 20 will be excited,
And then starting transformer cooler enters operating mode.
Above-listed detailed description is illustrating for the utility model possible embodiments, which is not to limit
The scope of protection of the utility model, all equivalence enforcements or change without departing from carried out by the utility model are intended to be limited solely by this case
In protection domain.
Claims (1)
1. a kind of transformer cooler control circuit, it is characterised in that：Including auxiliary contact (1) inside relay protection, it is intermediate after
Electric appliance (2), intermediate relay auxiliary contact (3) and cooler control relay (4), relay protection inside auxiliary contact
(1) and intermediate relay (2) is series at formation DC control circuit (10) between DC control busbar, the intermediate relay auxiliary
Contact (3) and cooler control relay (4), which are series in AC power, forms ac control circuit (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721521835.7U CN207637589U (en) | 2017-11-14 | 2017-11-14 | A kind of transformer cooler control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721521835.7U CN207637589U (en) | 2017-11-14 | 2017-11-14 | A kind of transformer cooler control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207637589U true CN207637589U (en) | 2018-07-20 |
Family
ID=62856942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721521835.7U Active CN207637589U (en) | 2017-11-14 | 2017-11-14 | A kind of transformer cooler control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207637589U (en) |
-
2017
- 2017-11-14 CN CN201721521835.7U patent/CN207637589U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| de Oliveira Quevedo et al. | Analysis and design of an electronic on-load tap changer distribution transformer for automatic voltage regulation | |
| CN203119316U (en) | Power electronic substation | |
| KR20130047703A (en) | Recovery device and method off recovery for open-phase in the power transmission line | |
| CN202717592U (en) | Novel high-voltage starting device for polycrystalline silicon reducing furnace | |
| Farazmand et al. | Analysis, modeling, and simulation of the phase-hop condition in transformers: The largest inrush currents | |
| CN207303696U (en) | A kind of city rail vehicle static debugging DC power system with converter system | |
| CN207637589U (en) | A kind of transformer cooler control circuit | |
| CN107565542A (en) | A kind of quiet tune power-supply system of urban rail | |
| CN204905710U (en) | Prevent condensation cubical switchboard | |
| CN109039055A (en) | A kind of control method of motor-drive circuit | |
| CN105487018B (en) | Testing device, electric inverse cutting cabinet and testing system of converter | |
| Kotak et al. | Prefluxing technique to mitigate inrush current of three-phase power transformer | |
| CN205620457U (en) | PT secondary voltage signal isolation sampling device based on isolation transformer | |
| CN208112223U (en) | Power of alterating and direct current multi-function test stand distribution system | |
| CN203607226U (en) | Power transformer for kitchen and bath electric appliances | |
| CN205429872U (en) | ESD system | |
| CN105281333A (en) | Anti-harmonic-wave reactive compensation capacitor module apparatus | |
| CN219372010U (en) | Device for avoiding closing inrush current of low-voltage isolation transformer and low-voltage power supply system | |
| CN213520730U (en) | Electrical control system of outdoor distribution box | |
| CN218850391U (en) | High-efficient heat dissipation type large-capacity current transformer secondary overvoltage protection device | |
| CN103424596A (en) | Acquiring and amplifying device of passive AC micro-current | |
| CN202749793U (en) | Independent power supply safety protection system of distribution transformer | |
| CN203434591U (en) | Security-isolation insulating power-off device | |
| CN214428471U (en) | Portable small-size transformer | |
| CN206740897U (en) | A kind of dry-type three-phase transformer leakage warning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |