CN204167994U - Extraordinary operating mode voltage shock avoiding protection cabinet - Google Patents
Extraordinary operating mode voltage shock avoiding protection cabinet Download PDFInfo
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- CN204167994U CN204167994U CN201420650550.3U CN201420650550U CN204167994U CN 204167994 U CN204167994 U CN 204167994U CN 201420650550 U CN201420650550 U CN 201420650550U CN 204167994 U CN204167994 U CN 204167994U
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- power supply
- static transfer
- cabinet
- air switch
- transfer switch
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- 230000035939 shock Effects 0.000 title claims abstract description 17
- 230000003068 static effect Effects 0.000 claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 101100165827 Mus musculus Cables1 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
Extraordinary operating mode voltage shock avoiding protection cabinet, belongs to voltage shock avoiding protective circuit field.Comprise: cabinet and be positioned at power supply and the protection cabinet major loop of cabinet; power supply is made up of the first power supply and second source; the output of the first power supply, second source connects STS Static Transfer Switch, and STS Static Transfer Switch controls the first power supply and second source switches.Rolling electric protection circuit is also connected in parallel in air switch both sides.The utility model realizes the switching between two power supplys by STS Static Transfer Switch, and instead of Conventional mass UPS, method is easy, has saved cost; Simultaneously at the both sides of air switch parallel connection rolling electric protection circuit; within STS Static Transfer Switch switching time; the not power down of A.C. contactor control loop, thus ensure that the product pump run is not affected when shaking electricity or short supply interruption, meet the particular/special requirement of special operation condition technique completely.
Description
Technical field
The utility model belongs to voltage shock avoiding protective circuit field, particularly one extraordinary operating mode voltage shock avoiding protection cabinet.
Background technology
Along with urban distribution network is grid-connected, the expanding day of looped network, and supply transformer capacity increases increasing of the equipped circuit brought, the power supply instantaneous loss of pressure i.e. phenomenon of " shake electricity " is more and more frequent, and " shake electricity " refers to the phenomenon of electrical network short time voltage fluctuation because thunderbolt, short circuit or other reasons cause or short supply interruption.Electric power system produce shake electricity mainly voltage collapse, rise sharply, short supply interruption and voltage flicker etc., its reason is that the voltage fluctuation probability that adjacent loop fault causes increases.Shook electricity in the past, process units is all forced to stop at every turn, and the continuity that heavy damage is produced causes very large loss economically.In order to reduce to shake electricity to producing the impact caused, the voltage shock avoiding technology of current employing, such as adopt various voltage shock avoiding module, self-starter, delayer etc., although major part is applicable to each different working condition requirement, but for the extraordinary operating mode that some technological requirements are higher, still cannot meet the demands, as CPP naphtha pyrolysis stove feedstock pump P-34506A/B(AC 380V, 37KW), when there is power supply and shaking electric, although CPP device can not cause larger impact as main air blower oil pump and most of visual plant have done rolling electric protection transformation, but CPP naphtha pyrolysis stove emergency stopping system requires very high to feed naphtha feed pressure, although compole is short when sometimes shaking electric, line voltage can be worked as when declining instantaneously, its product pump power output can die-off, material output pressure is caused to decline instantaneously, its low pressure values can trigger pyrolysis furnace emergency stop protection system, thus cause process units to stop in emergency, so, under this more special operating mode, common electric voltage shock avoiding protection cannot meet technological requirement at all.
Utility model content
The purpose of this utility model is by STS Static Transfer Switch and the electric protection circuit of shaking, and solves the rolling electric protection problem of the special operation condition that, materail tube defeated less pressure oscillation higher to material supply pressure requirements also can lead to grave consequences.
The technical solution of the utility model is achieved in that a kind of extraordinary operating mode voltage shock avoiding protection cabinet, comprise: cabinet and be positioned at power supply and the protection cabinet major loop of cabinet, the air switch that described protection cabinet main circuit is connected successively by power supply, A.C. contactor, thermal relay, current transformer and load composition, described power supply is made up of the first power supply and second source, this first power supply, the output of second source connects STS Static Transfer Switch, this STS Static Transfer Switch controls the first power supply and second source switches, the output of described STS Static Transfer Switch is connected with air switch, rolling electric protection circuit is also connected in parallel in described air switch both sides.
When described protection cabinet major loop connects two loads; first power supply and second source are connected STS Static Transfer Switch simultaneously; one road output of STS Static Transfer Switch connects the circuit be made up of the first air switch, the first A.C. contactor, the first thermal relay, the first current transformer and the first load successively, and this output also connects successively simultaneously and forms another circuit by the second air switch, the second A.C. contactor, the second thermal relay, the second current transformer and the second load.
Another road output of STS Static Transfer Switch also connects the circuit be made up of the first air switch, the first A.C. contactor, the first thermal relay, the first current transformer and the first load successively, and this another output also connects successively simultaneously and forms another circuit by the second air switch, the second A.C. contactor, the second thermal relay, the second current transformer and the second load.
Be connected in parallel to the first rolling electric protection circuit in the first described air switch both sides, be also connected in parallel to the second rolling electric protection circuit in the second described air switch both sides.
Described rolling electric protection circuit, is made up of rolling electric protection module and contactor control loop.
Contactor control loop is connected between the first terminal (7) and the second terminal (9) of described rolling electric protection module.
The beneficial effects of the utility model: the extraordinary operating mode voltage shock avoiding protection cabinet that the utility model adopts, the switching between two power supplys is realized by STS Static Transfer Switch, solve when electric supply occurs to shake electricity, the undisturbed problem of carrying out switching of electric supply, instead of traditional large-capacity ups i.e. three uninterrupted power supply(ups)s, method is easy, has saved cost simultaneously; The utility model also rolling electric protection circuit in parallel in the both sides of air switch simultaneously; this rolling electric protection circuit makes the AC coil of contactor there will not be power-off dropout phenomenon; namely within STS Static Transfer Switch switching time; the not power down of A.C. contactor control loop; thus ensure that the product pump run is not affected when shaking electricity or short supply interruption, meet the particular/special requirement of special operation condition technique completely.
Accompanying drawing explanation
Fig. 1 is the utility model extraordinary operating mode voltage shock avoiding protection cabinet schematic diagram;
Fig. 2 is the circuit theory diagrams protected in the utility model embodiment under the independent loading condition of cabinet major loop;
Fig. 3 is the circuit theory diagrams protected in utility model embodiment under the two loading condition of cabinet major loop;
Fig. 4 shakes the circuit theory diagrams of electric protection circuit in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing 1 ~ 4, embodiment of the present utility model is further described in detail.
Embodiment 1:
The present embodiment adopts a kind of extraordinary operating mode voltage shock avoiding protection cabinet, comprising: cabinet and be positioned at power supply L1, power supply L2 and the protection cabinet major loop of cabinet.
As shown in Figure 1, this cabinet adopts steel plate to bend and form to the cabinet that the present embodiment adopts, and lands installation.After cabinet bottom have first, second two-way input power cable connecting terminal, P-34506A/B two pumps load binding post and realize chain control, two places control, hand is from the external control cables binding post of the multiple control modes such as conversion and control.Cabinet front upper part is installed STS Static Transfer Switch and is controlled display liquid crystal display screen, cabinet door is installed the control button of two pumps, indicator light and ammeter.
Protection cabinet major loop is provided with, as shown in Figure 2 in cabinet.This major loop comprises two independent current source L1 and L2, air switch (model in the present embodiment is NS80HMA) and STS Static Transfer Switch (model in the present embodiment is HPS-33300), wherein, independent current source L1 is connected with an input of STS Static Transfer Switch by air switch QF1, independent current source L2 is connected with another input of STS Static Transfer Switch by air switch QF2, two different outputs of STS Static Transfer Switch connect air switch QF3 simultaneously successively, A.C. contactor KM1, thermal relay JR1, current transformer TA1 and motor M 1 (adopt motor as load in the present embodiment, the model of the electric-motor pump of this motor is P-34506a, capacity motor is 37kw).
Under normal operating conditions, the power supply L1 as working power is in normal voltage range, and motor M 1 is connected to power supply L1 always.When power supply L1 breaks down, such as, shake electric, STS Static Transfer Switch is instantaneous automatically switches to power supply L2 by power supply by power supply L1, and power supply L1 recovers normally, and motor switches to again power supply L1.STS Static Transfer Switch adopts the switching mode of break-before-make, the switching between different input power can be realized, because switching time is extremely short, general switching time≤8ms, be less than half sinusoidal cycle (sinusoidal cycle 20 ms of AC power frequency one), so the power output of motor has almost no change, the particular/special requirement of technique can be met.
In addition, although switch the particular/special requirement that can meet technique when shaking electric by STS Static Transfer Switch, but in control loop A.C. contactor KM1(particularly capacity is less) even if when switching time≤8ms, also there will be AC coil power-off dropout phenomenon, thus cause termination of pumping.In order to head it off, the present embodiment have employed rolling electric protection module.The rolling electric protection module model adopted in the present embodiment is WS-M100/220; this protection module is in setting-up time; A.C. contactor can be maintained do not thread off when short supply interruption; namely within STS Static Transfer Switch switching time; the not power down of A.C. contactor control loop; thus ensure not to be affected when shaking electricity or short supply interruption at the product pump just run, meet the particular/special requirement of technique completely.
Embodiment 2:
Main control loop in embodiment 1 can also connect 2 even multiple loads.In the present embodiment, still adopt the power supply identical with embodiment 1 as the power supply of load, such as, as shown in Figure 3, power supply L1 is connected STS Static Transfer Switch with power supply L2 simultaneously, an output of STS Static Transfer Switch connects the load circuit be made up of air switch QF3, A.C. contactor KM1, thermal relay JR1, current transformer TA1 and motor M 1 successively, and this output also connects second load circuit be made up of air switch QF4, A.C. contactor KM2, thermal relay JR2, current transformer TA2 and motor M 2 simultaneously successively.Another output of STS Static Transfer Switch also connects the load circuit be made up of air switch QF3, A.C. contactor KM1, thermal relay JR1, current transformer TA1 and motor M 1 successively, and this another output also connects second load circuit be made up of air switch QF4, A.C. contactor KM2, thermal relay JR2, current transformer TA2 and motor M 2 simultaneously successively.
Under normal operating conditions, the power supply L1 as working power is in normal voltage range, and motor M 1 is connected to power supply L1 always, and motor M 2 is connected to power supply L2.When power supply L1 breaks down, such as, shake electric, STS Static Transfer Switch is instantaneous automatically switches to power supply L2 by power supply by power supply L1, is that motor M 1 and motor M 2 are powered simultaneously by power supply L2.Power supply L1 recovers normally, and motor M 2 switches to again is powered by power supply L1.
Or, under normal operating conditions, power supply L1 as working power is in normal voltage range, motor M 1, motor M 2 are all connected to power supply L1 always, when power supply L1 breaks down, such as, rolling electricity, STS Static Transfer Switch is instantaneous automatically switches to power supply L2 by power supply by power supply L1, is that motor M 1 and motor M 2 are powered simultaneously by power supply L2.Power supply L1 recovers normally, and motor M 2 switches to again is powered by power supply L1.
Same is connected in parallel to the first rolling electric protection circuit in air switch QF3 both sides, is also connected in parallel to the second rolling electric protection circuit in air switch QF4 both sides, is used for maintaining A.C. contactor and does not thread off.
Embodiment 3:
On the basis of embodiment and embodiment 2 major loop, the in parallel rolling electric protection circuit being used for maintaining A.C. contactor and not threading off in air switch both sides, as shown in Figure 4.Rolling electric protection circuit in the present embodiment comprises rolling electric protection module and contactor control loop composition, and wherein, electric protection module of shaking adopts WS-M100/220 to realize.The A end of rolling electric protection circuit is connected with air switch QF3 primary side, and the B end of rolling electric protection circuit is connected with the secondary side of air switch QF3.
Embodiment 4:
During normal work, the terminal 1 of rolling electric protection module WS-M100/220 is connected working power with terminal 3.When electricity is shaken in generation, STS Static Transfer Switch electrical source exchange, air switch QF meeting moment dead electricity, the terminal 7 of rolling electric protection module WS-M100/220 is connected contactor control loop with terminal 9.In contactor control loop; by the terminal 7 of rolling electric protection module WS-M100, access KA successively protect contact, hand from the chain contact of conversion switch S A, DCS, open stop button SB1; SB2, SB3, SB4, the terminal 9 getting back to rolling electric protection module WS-M100 forms contactor control loop.It is constant that this control loop can maintain control power supply during out-put supply always, thus ensure that the A.C. contactor of adhesive is not always threaded off, and motor can operate always.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (4)
1. an extraordinary operating mode voltage shock avoiding protection cabinet, comprise: cabinet and be positioned at power supply and the protection cabinet major loop of cabinet, the air switch that described protection cabinet main circuit is connected successively by power supply, A.C. contactor, thermal relay, current transformer and load form, it is characterized in that: described power supply is made up of the first power supply and second source, the output of this first power supply, second source connects STS Static Transfer Switch, this STS Static Transfer Switch controls the first power supply and second source switches, and the output of described STS Static Transfer Switch is connected with air switch; Rolling electric protection circuit is also connected in parallel in described air switch both sides.
2. extraordinary operating mode voltage shock avoiding protection cabinet according to claim 1, it is characterized in that: when described protection cabinet major loop connects two loads, first power supply and second source are connected STS Static Transfer Switch simultaneously, one road output of STS Static Transfer Switch connects by the first air switch successively, first A.C. contactor, first thermal relay, the circuit of the first current transformer and the first load composition, this output also connects by the second air switch simultaneously successively, second A.C. contactor, second thermal relay, second current transformer and the second load form another circuit,
Another road output of STS Static Transfer Switch also connects the circuit be made up of the first air switch, the first A.C. contactor, the first thermal relay, the first current transformer and the first load successively, and this another output also connects successively simultaneously and forms another circuit by the second air switch, the second A.C. contactor, the second thermal relay, the second current transformer and the second load;
Be connected in parallel to the first rolling electric protection circuit in the first described air switch both sides, be also connected in parallel to the second rolling electric protection circuit in the second described air switch both sides.
3. extraordinary operating mode voltage shock avoiding protection cabinet according to claim 1, is characterized in that: described rolling electric protection circuit, is made up of rolling electric protection module and contactor control loop.
4. extraordinary operating mode voltage shock avoiding protection cabinet according to claim 3, is characterized in that: between the first terminal (7) and the second terminal (9) of described rolling electric protection module, connect contactor control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420650550.3U CN204167994U (en) | 2014-11-04 | 2014-11-04 | Extraordinary operating mode voltage shock avoiding protection cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420650550.3U CN204167994U (en) | 2014-11-04 | 2014-11-04 | Extraordinary operating mode voltage shock avoiding protection cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167994U true CN204167994U (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420650550.3U Expired - Lifetime CN204167994U (en) | 2014-11-04 | 2014-11-04 | Extraordinary operating mode voltage shock avoiding protection cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204167994U (en) |
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2014
- 2014-11-04 CN CN201420650550.3U patent/CN204167994U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |