CN207753453U - A kind of ship connects electric phase sequence automatic conversion and open phase protection - Google Patents
A kind of ship connects electric phase sequence automatic conversion and open phase protection Download PDFInfo
- Publication number
- CN207753453U CN207753453U CN201820166872.9U CN201820166872U CN207753453U CN 207753453 U CN207753453 U CN 207753453U CN 201820166872 U CN201820166872 U CN 201820166872U CN 207753453 U CN207753453 U CN 207753453U
- Authority
- CN
- China
- Prior art keywords
- phase
- relay
- phases
- contactor
- phase power
- 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.)
- Expired - Fee Related
Links
- 238000000819 phase cycle Methods 0.000 title claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 101000604592 Homo sapiens Keratin-like protein KRT222 Proteins 0.000 claims description 7
- 102100038184 Keratin-like protein KRT222 Human genes 0.000 claims description 7
- 230000005611 electricity Effects 0.000 abstract description 13
- 230000009471 action Effects 0.000 description 4
- 230000001934 delay Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model discloses a kind of ships to connect electric phase sequence automatic conversion and open phase protection, including babinet and three-phase power input end mouth A phases, B phases and C phases power supply and the air switch mounted on box house, the first A.C. contactor, the second A.C. contactor, disconnected phase and phase sequence protective relay, first time relay, second time relay, the first intermediate relay and the second intermediate relay.The technical solution of the utility model utilizes phase and phase sequence relay, A.C. contactor, the time relay and the intermediate relay of breaking; realize the power phase automatic conversion that ship connects electricity; reduce the workload of operating personnel; avoid the error that manual operation is brought; it is efficient and convenient; it is time saving and energy saving, while the effective protection ship electrical equipment the bank electricity phase shortage in the case of.
Description
Technical field
The utility model belongs to dock ship power supply control technology field, and in particular to a kind of ship connects electric phase sequence from turn
It changes and open phase protection.
Background technology
Ship berthing harbour generally patches three-phase three-wire system bank electricity, requires to be unable to phase shortage and be unable to negative phase-sequence when connecing electricity（It is commonly called as
Reverse phase）.Phase shortage and reverse phase can damage ship equipment.At present use bank electricity connect electric mode for：First by ship and bank electricity
It connects, further according to the phase-sequence indicator by power supply ship to determine whether phase sequence is correct；If phase sequence correctly then be used directly, if phase
Sequence is incorrect, then disconnection is needed to connect electricity or manual operation phase sequence change-over switch progress phase sequence conversion again.It is such to connect electric mode
It is time-consuming and laborious, considerably increase the workload that operating personnel's bank electricity patches.
The especially rural power grid power supply of harbour power grid has phase shortage to happen once in a while.When phase shortage occurs, single-phase motor running,
Electric current can substantially exceed motor rated current, then burn out winding, and not had automatic protection setting to this by power supply ship, if
It is only taken precautions against with crewman's experience, can still there is some potential safety problems, the equipment on ship can be burnt out when serious.
Invention content
In order to solve the above problem, the purpose of this utility model is to provide a kind of ships to connect electric phase sequence automatic conversion and disconnected phase
Protective device, the ship connect electric phase sequence automatic conversion and overcome the deficiencies in the prior art with open phase protection, realize ship
The power phase automatic conversion for connecing electricity, reduces the workload of operating personnel, avoids the error that manual operation is brought, quick side
Just, time saving and energy saving, while the effective protection ship electrical equipment the bank electricity phase shortage in the case of.
The utility model ship connects the technical solution of electric phase sequence automatic conversion and open phase protection：A kind of ship connects electric phase
Sequence automatic conversion and open phase protection, including babinet and three-phase power input end mouth A phases, B phases and C phase power supplys, feature
It is：The phase sequence automatic conversion and open phase protection further include mounted on box house air switch, first exchange and connect
In tentaculum, the second A.C. contactor, disconnected phase and phase sequence protective relay, first time relay, second time relay, first
Between relay and the second intermediate relay；
First A.C. contactor includes coil KM1 and main contact KM11 and normally closed interlock KM1 ' and normally closed interlock
KM1”；Second A.C. contactor includes coil KM2 and main contact KM21 and normally closed interlock KM2 '；First exchange connects
Tentaculum and the second A.C. contactor are connected in parallel, the first A.C. contactor（4）Main contact KM11 and the second A.C. contactor（5）
Main contact KM21 input terminals connect respectively with three-phase power input end mouth A phases, B phases and C phase power supplys, output end with load phase
It connects；
The disconnected phase and phase sequence protective relay includes control coil XJ3-G, normally closed interlock XJ3-G ', normally open contact XJ3-
G”；The first time relay includes coil T0, normally closed interlock T01 and normally open contact T02；Second time relay packet
Include coil T1 and delay normally open contact T11；First intermediate relay include coil KA1, normally closed interlock KA11 and it is normally opened touch
Head KA12, normally open contact KA13；Second intermediate relay include coil KA2, normally closed interlock KA21 and normally open contact KA22,
Normally open contact KA23；
Input terminal L1, L2, L3 of the control coil XJ3-G of the disconnected phase and phase sequence protective relay passes through air switch point
It is not connect with three-phase power input end mouth A phases, B phases and C phase power supplys；The normally closed interlock of the disconnected phase and phase sequence protective relay
One end of XJ3-G ' concatenated with the first intermediate relay normally closed interlock KA11 after with the A phase power supplys in the input port of three phase mains
Connection, the other end successively with the delay normally open contact T11 of second time relay, first time relay normally open contact T02,
After the coil KA2 concatenation of second intermediate relay, then it is connect with the B phase power supplys of three-phase power input end mouth by air switch；
It is gone here and there with the second intermediate relay normally closed interlock KA21 one end of the normally open contact XJ3-G " of the disconnected phase and phase sequence protective relay
It connects and is connect afterwards with the A phase power supplys in three-phase power input end mouth, the other end leads to after being concatenated with the coil KA1 of the first intermediate relay
Air switch is crossed to connect with the B phase power supplys in three-phase power input end mouth；
One end of the first time relay coil T0 is connect with A phase power supplys, the other end by after air switch with B phases
Power supply connects；The normally closed interlock T01 of first time relay is connected in parallel on the normally open contact XJ3- of disconnected phase and phase sequence protective relay
The both ends of G "；After one end of the coil T1 of second time relay is concatenated with the normally closed interlock KM1 ' of the first A.C. contactor
It is connect with A phase power supplys, the other end is connected by air switch with B phase power supplys；
One end of the coil KM1 of first A.C. contactor successively with the normally closed interlock KM2 ' of the second A.C. contactor,
It is connected with A phase power supplys after the normally open contact KA13 concatenations of first intermediate relay, the other end is normally opened with the first intermediate relay
It is connected with C phase power supplys after contact KA12 concatenations；One end of the coil KM2 of second A.C. contactor exchanges with first connect successively
The normally closed interlock KM1 " of tentaculum, the second intermediate relay normally open contact KA22 concatenations after be connected with A phase power supplys, the other end and the
It is connected with C phase power supplys after the normally open contact KA23 concatenations of two intermediate relays.
The babinet（1）Cabinet door on be respectively arranged with A phases, B phases and C phase power supply indicators；The A phases, B phases and C
Phase power supply indicator is connect by air switch with three-phase power input end mouth A phases, B phases and C phase power supplys respectively.
It further includes fuse that the ship, which connects electric phase sequence automatic conversion with open phase protection,；The fuse is connected to three
Between the output end L1 of the control coil XJ3-G of A phases and disconnected phase and phase sequence protective relay in phase power supply.
In the above-mentioned technical solutions, the utility model utilizes phase and phase sequence relay, A.C. contactor, the time relay of breaking
And intermediate relay, the shore electric power phase sequence automatic conversion of access can be realized, in output end（That is ship）Correct phase is obtained,
Operating process when connecing bank electricity is simplified, working strength is reduced, improves working efficiency；In addition, having by disconnected phase and phase sequence relay
The electrical equipment usage safety performance for improving ship is imitated, the phase shortage in the disconnected phase of power supply or burst is realized, realizes certainly
It is dynamic to stop power supply, Ship Electrical Power System is protected, the electrical equipment damage of the ship not caused by, efficient and convenient, time saving province are avoided
Power.
Description of the drawings
Fig. 1 is the structural schematic diagram that a kind of ship of the utility model connects electric phase sequence automatic conversion and open phase protection.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with figure and embodiment,
Electric phase sequence automatic conversion is connect to a kind of ship of the utility model to be further elaborated with open phase protection.It should manage
Solution, specific embodiment described herein are only used to explain the utility model, are not used to limit the utility model.
As seen from Figure 1, a kind of ship of the present embodiment connects electric phase sequence automatic conversion and open phase protection, including babinet
1 air switch 3 with three-phase power input end mouth A phases, B phases with C phases power supply and inside babinet 1, first, which exchange, to be connect
Tentaculum 4, the second A.C. contactor 5, disconnected phase and phase sequence protective relay 6, first time relay 7, second time relay 8,
First intermediate relay 9 and the second intermediate relay 10.
First A.C. contactor 4 of the present embodiment is including coil KM1 and main contact KM11 and normally closed interlock KM1 ' and often
Close contact KM1 "；Second A.C. contactor 5 includes coil KM2 and main contact KM21 and normally closed interlock KM2 '.The present embodiment
First A.C. contactor 4 and the second A.C. contactor 5 are connected in parallel, and the main contact KM11 of the first A.C. contactor 4 and second is handed over
The main contact KM21 input terminals of stream contactor 5 are connect with three-phase power input end mouth A phases, B phases and C phase power supplys respectively, output end
Connect with load.
The disconnected phase and phase sequence protective relay 6 of this present embodiment include control coil XJ3-G, normally closed interlock XJ3-G ', often
Open contact XJ3-G "；The first time relay 7 includes coil T0, normally closed interlock T01 and normally open contact T02.Second time
Relay 8 includes coil T1 and delay normally open contact T11.First intermediate relay 9 include coil KA1, normally closed interlock KA11 and
Normally open contact KA12, normally open contact KA13.Second intermediate relay 10 includes coil KA2, normally closed interlock KA21 and normally open contact
KA22, normally open contact KA23.
In the present embodiment, input terminal L1, L2, L3 of the control coil XJ3-G of disconnected phase and phase sequence protective relay 6 pass through sky
Air cock 3 is connect with three-phase power input end mouth A phases, B phases and C phase power supplys respectively, the normally closed of phase and phase sequence protective relay 6 of breaking
One end of contact XJ3-G ' concatenated with the first intermediate relay normally closed interlock KA11 after with the A phases in the input port of three phase mains
Power supply connects, and the other end is touched with the delay normally open contact T11 of second time relay 8, the normally opened of first time relay 7 successively
Head T02, the second intermediate relay 10 coil KA2 concatenation after, then pass through the B phases of air switch 3 and three-phase power input end mouth
Power supply connects；One end of the normally open contact XJ3-G " of the disconnected phase and phase sequence protective relay 6 and the second intermediate relay are normally closed
It is connect with the A phase power supplys in three-phase power input end mouth after contact KA21 concatenations, the coil of the other end and the first intermediate relay 9
It is connect with the B phase power supplys in three-phase power input end mouth by air switch 3 after KA1 concatenations.
One end of the 7 coil T0 of first time relay of the present embodiment is connect with A phase power supplys, and the other end passes through air switch
It is connect with B phase power supplys after 3；The normally closed interlock T01 of first time relay 7 is connected in parallel on the normal of disconnected phase and phase sequence protective relay 6
The both ends of open contact XJ3-G "；It is touched with the normally closed of the first A.C. contactor 4 one end of the coil T1 of second time relay 8
It is connect with A phase power supplys after head KM1 ' concatenations, the other end is connected by air switch 3 with B phase power supplys.
It is touched successively with the normally closed of the second A.C. contactor 5 one end of the coil KM1 of first A.C. contactor 4 of the present embodiment
Head KM2 ', the first intermediate relay 9 normally open contact KA13 concatenation after be connected with A phase power supplys, the other end and the first intermediate relay
It is connected with C phase power supplys after the normally open contact KA12 concatenations of device 9；One end of the coil KM2 of second A.C. contactor 5 successively with
The normally closed interlock KM1 " of first A.C. contactor 5, the second intermediate relay 10 normally open contact KA22 concatenation after with A phase power supply phases
Even, the other end is connected with after the normally open contact KA23 concatenations of the second intermediate relay 10 with C phase power supplys.
In the present embodiment, A phases, B phases and C phases power supply indicator 2 are respectively arranged on the cabinet door of babinet 1；The A phases, B
Mutually it is connect respectively with three-phase power input end mouth A phases, B phases and C phase power supplys by air switch 3 with C phases power supply indicator 2.
The ship of the present embodiment connects electric phase sequence automatic conversion and open phase protection is provided with fuse 11, the present embodiment
Fuse 11 is connected to the output end L1 of the control coil XJ3-G of A phases and disconnected phase and phase sequence protective relay 6 in three phase mains
Between, that is, fuse 11 is connected between A phases and entire control loop.
In the present embodiment, when three phase mains inputs positive sequence, the control coil XJ3-G for the phase and phase sequence relay of breaking and the
The coil T0 of one time relay is acted, and passes through A phases power supply → 3 → fuse of air switch, 11 → the second intermediate relay respectively
The coil KA1 of the intermediate relays of normally open contact XJ3-G " → first of the normally closed interlock KA21 of device → disconnected phase and phase sequence relay
The coil KA1 of → B phase power supplys, forming circuit, intermediate relay is attracted, at this point, again by the intermediate relay of A phases power supply → first
The A.C. contactors of normally open contact KA13 → second the A.C. contactors of normally closed interlock KM2 ' → first coil KM1 → the first in
Between relay normally open contact KA12 → power supply C phases, the coil KM1 of A.C. contactor is attracted, and main contact KM11 closures reach
The purpose of positive sequence power supply；Meanwhile normally closed interlock KM1 " is disconnected, it is ensured that the coil KM2 of the second A.C. contactor must not be electric with reality
Existing electrical interlocks；When three phase mains inputs negative phase-sequence, the control coil XJ3-G of disconnected phase and phase sequence relay is failure to actuate, when first
Between relay coil T0 action, normally closed interlock T01 delays disconnect, the coil KA1 dead electricity of the first intermediate relay, when second
Between relay coil T1 by the normally closed interlock KM1` energized actions of the first A.C. contactor, then in A phase power supply → the first
Between relay normally closed interlock KA11 → disconnected phase and phase sequence relay the time relays of normally closed interlock XJ3-G ' → second it is normal
Coil KA2 → B phase power supplys of the intermediate relays of normally open contact T02 → second of open contact T11 → first time relay, it is intermediate
The coil KA2 action of relay, then A.C. contactors of normally open contact KA22 → first of the intermediate relay of A phases power supply → second
The A.C. contactors of normally closed interlock KM1 "-second the intermediate relays of coil KM2 → second normally open contact KA23 → C phases electricity
Source, the coil KM2 of the second A.C. contactor obtain electric, and main contact KM21 is attracted to realize positive sequence power supply automatically again；Meanwhile
Its normally closed interlock KM2 ' is disconnected, it is ensured that the coil KM1 of the first A.C. contactor must not be electric, to realize electrical interlocks；Input negative phase-sequence
The time for being automatically switched to positive sequence power supply is the sum of two time relay delays, and the present apparatus is set as 6 seconds;
In the present embodiment, three-phase arbitrarily one phase of missing of A phase, B phase, C phase power supply cannot all make the first A.C. contactor
Coil KM1 or the second A.C. contactor coil KM2 energized actions, to realize phase shortage automatic protection.The present embodiment
In, other than above-mentioned electrical interlocks, device is also in the coil of the coil KM1 and the second A.C. contactor of the first A.C. contactor
Mechanical interlocking mechanism is equipped between KM2, it is ensured that line security is run.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality
All any modification, equivalent and improvement etc., should be included in the guarantor of the utility model made by within novel spirit and principle
Within the scope of shield.
Claims (3)
1. a kind of ship connects electric phase sequence automatic conversion and open phase protection, including babinet（1）And three-phase power input end mouth A
Phase, B phases and C phase power supplys, it is characterised in that：The phase sequence automatic conversion further includes being mounted on babinet with open phase protection（1）
Internal air switch（3）, the first A.C. contactor（4）, the second A.C. contactor（5）, disconnected phase and phase sequence protective relay
（6）, first time relay（7）, second time relay（8）, the first intermediate relay（9）With the second intermediate relay
（10）；
First A.C. contactor（4）Including coil KM1 and main contact KM11 and normally closed interlock KM1 ' and normally closed interlock
KM1”；Second A.C. contactor（5）Including coil KM2 and main contact KM21 and normally closed interlock KM2 '；Described first hands over
Flow contactor（4）With the second A.C. contactor（5）It is connected in parallel, the first A.C. contactor（4）Main contact KM11 and second hand over
Flow contactor（5）Main contact KM21 input terminals connect respectively with three-phase power input end mouth A phases, B phases and C phase power supplys, export
End connects with load；
The disconnected phase and phase sequence protective relay（6）Including control coil XJ3-G, normally closed interlock XJ3-G ', normally open contact XJ3-
G”；The first time relay（7）Including coil T0, normally closed interlock T01 and normally open contact T02；Second time relay
Device（8）Including coil T1 and delay normally open contact T11；First intermediate relay（9）Including coil KA1, normally closed interlock
KA11 and normally open contact KA12, normally open contact KA13；Second intermediate relay（10）Including coil KA2, normally closed interlock
KA21 and normally open contact KA22, normally open contact KA23；
The disconnected phase and phase sequence protective relay（6）Input terminal L1, L2, L3 of control coil XJ3-G pass through air switch（3）
It is connect respectively with three-phase power input end mouth A phases, B phases and C phase power supplys；The disconnected phase and phase sequence protective relay（6）It is normally closed
One end of contact XJ3-G ' concatenated with the first intermediate relay normally closed interlock KA11 after with the A phases in the input port of three phase mains
Power supply connect, the other end successively with second time relay（8）Delay normally open contact T11, first time relay（7）It is normal
Open contact T02, the second intermediate relay（10）Coil KA2 concatenation after, then pass through air switch（3）With three-phase power input end
The B phase power supplys connection of mouth；The disconnected phase and phase sequence protective relay（6）Normally open contact XJ3-G " one end and second among after
It is connect with the A phase power supplys in three-phase power input end mouth after electric appliance normally closed interlock KA21 concatenations, the other end and the first intermediate relay
Device（9）Coil KA1 concatenation after pass through air switch（3）It is connect with the B phase power supplys in three-phase power input end mouth；
The first time relay（7）One end of coil T0 is connect with A phase power supplys, and the other end passes through air switch（3）Afterwards with B
Phase power supply connects；First time relay（7）Normally closed interlock T01 be connected in parallel on disconnected phase and phase sequence protective relay（6）It is normally opened
The both ends of contact XJ3-G "；Second time relay（8）Coil T1 one end and the first A.C. contactor（4）It is normally closed
It is connect with A phase power supplys after contact KM1 ' concatenations, the other end passes through air switch（3）It is connected with B phase power supplys；
First A.C. contactor（4）Coil KM1 one end successively with the second A.C. contactor（5）Normally closed interlock
KM2 ', the first intermediate relay（9）Normally open contact KA13 concatenation after be connected with A phase power supplys, the other end and the first intermediate relay
Device（9）Normally open contact KA12 concatenation after be connected with C phase power supplys；Second A.C. contactor（5）Coil KM2 one end according to
Secondary and the first A.C. contactor（4）Normally closed interlock KM1 ", the second intermediate relay（10）Normally open contact KA22 concatenation after with A
Phase power supply is connected, the other end and the second intermediate relay（10）Normally open contact KA23 concatenation after be connected with C phase power supplys.
2. a kind of ship according to claim 1 connects electric phase sequence automatic conversion and open phase protection, it is characterised in that：Institute
State babinet（1）Cabinet door on be respectively arranged with A phases, B phases and C phase power supply indicators（2）；The A phases, B phases and C phase power supplys refer to
Show lamp（2）Pass through air switch respectively（3）It is connect with three-phase power input end mouth A phases, B phases and C phase power supplys.
3. a kind of ship according to claim 1 connects electric phase sequence automatic conversion and open phase protection, it is characterised in that：Institute
It further includes fuse to state ship and connect electric phase sequence automatic conversion with open phase protection（11）；The fuse（11）It is connected to three-phase
A phases in power supply and disconnected phase and phase sequence protective relay（6）Control coil XJ3-G output end L1 between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820166872.9U CN207753453U (en) | 2018-01-31 | 2018-01-31 | A kind of ship connects electric phase sequence automatic conversion and open phase protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820166872.9U CN207753453U (en) | 2018-01-31 | 2018-01-31 | A kind of ship connects electric phase sequence automatic conversion and open phase protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207753453U true CN207753453U (en) | 2018-08-21 |
Family
ID=63154490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820166872.9U Expired - Fee Related CN207753453U (en) | 2018-01-31 | 2018-01-31 | A kind of ship connects electric phase sequence automatic conversion and open phase protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207753453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557348A (en) * | 2018-11-28 | 2019-04-02 | 邱雅君 | A kind of intelligent electric energy meter self conversion equipment of magnetic torque positive sequence backward |
-
2018
- 2018-01-31 CN CN201820166872.9U patent/CN207753453U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557348A (en) * | 2018-11-28 | 2019-04-02 | 邱雅君 | A kind of intelligent electric energy meter self conversion equipment of magnetic torque positive sequence backward |
| CN109557348B (en) * | 2018-11-28 | 2021-02-23 | 哈尔滨汇鑫仪器仪表有限责任公司 | Magnetic torque positive sequence and negative sequence self-conversion device for intelligent electric energy meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201478875U (en) | Double-power automatic conversion cabinet | |
| CN202334398U (en) | Special frequency converter for ball mill | |
| CN206077065U (en) | Auto switching electric source system | |
| CN204029047U (en) | A kind of pre-payment control box | |
| CN203151410U (en) | Automatic switching controller for realizing mutual spare of two electric motors | |
| CN207753453U (en) | A kind of ship connects electric phase sequence automatic conversion and open phase protection | |
| CN203929925U (en) | A kind of protective relaying device divide-shut brake return circuit testing device | |
| CN211063344U (en) | Automatic interlocking control system of two incoming line cabinets and one bus-bar cabinet | |
| CN204706521U (en) | A kind of breaker operator circuit | |
| CN208690936U (en) | A kind of seamless switching type phase-change switch | |
| CN102868214A (en) | utomatic standby power supply switching box in small water power station | |
| CN103532445B (en) | A kind of startup control device of heavy load start of motor and control method thereof | |
| CN104360716B (en) | Main frame and peripheral hardware switching sequence control device | |
| CN204733099U (en) | A kind of reduced-voltage starting control system | |
| CN204794328U (en) | Three -phase electricity dual supply automatic switching control equipment | |
| CN203722328U (en) | Apparatus capable of automatically switch power frequency electric supply in case of UPS own faults | |
| CN205178889U (en) | Public dc bus system of two converters after optimization | |
| CN209419524U (en) | A kind of electric machine control system of cement kiln flue gas capture system | |
| CN103762716A (en) | Auto-putting-in and auto-recovering power supply system | |
| CN109921325B (en) | Switch cabinet closing locking loop | |
| CN206907721U (en) | A kind of breaker electric spring operating mechanism separating brake control loop | |
| CN206930969U (en) | A kind of main transformer cooler control loop | |
| CN201699423U (en) | Three-phase power voltage stabilizer with three-phase simultaneous output function and three-single-phase independent output function | |
| CN108173242B (en) | Motor-pumped well control cabinet and control method | |
| CN206259872U (en) | A kind of three phase alternating current motor starts brake control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 |