CN203243111U - Control loop for two-path alternating-current wire incoming and communication power distribution - Google Patents
Control loop for two-path alternating-current wire incoming and communication power distribution Download PDFInfo
- Publication number
- CN203243111U CN203243111U CN 201320147190 CN201320147190U CN203243111U CN 203243111 U CN203243111 U CN 203243111U CN 201320147190 CN201320147190 CN 201320147190 CN 201320147190 U CN201320147190 U CN 201320147190U CN 203243111 U CN203243111 U CN 203243111U
- Authority
- CN
- China
- Prior art keywords
- loop
- breaker
- electrically operated
- point
- auxiliary relay
- 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 - Lifetime
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model relates to the field of power distribution control for circuits with levels of 690 V, 630 A, and lower, and in particular to a control loop for two-path alternating-current wire incoming and communication power distribution. The control loop comprises a 1# wire incoming loop, a 2# wire incoming loop and a communication loop, and is characterized in that moulded case circuit breakers and split matching devices are arranged in the 1# wire incoming loop, the 2# wire incoming loop and the communication loop respectively, so that the communication loop can realize automatic switchover when the 1# wire incoming loop or the 2# wire incoming loop is failed; and the alternating-current moulded case circuit breakers 1-Q1, 2-Q1 and 3-Q1 are plug-in moulded case circuit breakers with electric operation mechanisms, and matched with an on-off position auxiliary point OF, a fault tripping point SDE and an under-voltage tripper MN. Compared with the prior, the control loop disclosed by the utility model has the following advantages that: 1) the electric operation mechanisms and matching components are concentratedly installed and convenient to maintain; 2) state display is comprehensive and clear, and monitoring action is reliable; and 3) the main components are plug-in type, and simple and convenient to operate.
Description
Technical field
The utility model relates to 690V, 630A and following circuit distribution control field, and particularly a kind of two-way exchanges inlet wire and contact distribution control loop.
Background technology
At present, in the large capacity circuit more than 630A, two-way inlet wire, the contact distribution control frame circuit breakers that adopt more, operate frame circuit breaker in the two-way electric power loop and the contact frame circuit breaker between the two-way electric power loop by mode manually or automatically, realize the control to one section power supply or two sections power supplies.See Fig. 1, interchange incoming power 1 links to each other with frame circuit breaker 1-Q1 and consists of one section current supply circuit; Interchange incoming power 2 links to each other with frame circuit breaker 2-Q1 and consists of two sections current supply circuits; The contact unit is linked to each other one section current supply circuit by frame circuit breaker 3-Q1 with two sections current supply circuits.When any one road power supply suddenly disappeared, frame circuit breaker 3-Q1 automatic closing made one or two section of dead electricity to continue electricly, can avoid the Loss of power failure situation of one section or two sections power supply to occur.According to actual conditions, 630A and following frame circuit breaker are actually rare, for 630A and following circuit, if replace 630A and following interchange breaker of plastic casing with the above frame circuit breaker of 630A, will cause actual use cost to improve.The design is used for two-way inlet wire breaker of plastic casing and contact breaker of plastic casing are carried out control mainly for 630A and following circuit.
Summary of the invention
The purpose of this utility model provides a kind of two-way and exchanges inlet wire and contact distribution control loop, be used for 690V, 630A and following circuit, adopt and exchange breaker of plastic casing and supporting OF+SDE+MN device, realize the manually or automatically switching after the power supply dead electricity of a certain road, the user's that avoids powering Loss of power failure occurs.
For achieving the above object, the utility model adopts following technical scheme to realize:
Two-way exchanges inlet wire and contact distribution control loop, comprises 1# wire inlet loop, 2# wire inlet loop and contact loop, arranges respectively in described 1# wire inlet loop, 2# wire inlet loop and contact loop and exchanges breaker of plastic casing and corollary apparatus, and its concrete structure is:
1) in the 1# wire inlet loop, be provided with the normally closed point of contact unit auxiliary relay KA3 and 2# inlet wire auxiliary relay KA2 in the control loop of the under-voltage release 1-MN of interchange breaker of plastic casing 1-Q1, be provided with the normally closed point of contact unit auxiliary relay KA3 among the closing circuit A2 of the electrically operated institution DC1 of interchange breaker of plastic casing 1-Q1, establish switch knob 1-SB1 on the closing circuit A2 of electrically operated institution DC1; Establish opening button 1-SB2 on the sub-gate circuit A4 of electrically operated institution DC1;
Establish the normally closed point of fault trip point 1-SDE on the fault interlock circuit B2 of electrically operated institution DC1, be located in the current supply circuit of malfunction indicator lamp 1-H3 the normal battle of fault trip point 1-SDE;
The control loop of auxiliary relay KA1 coil is provided with deciliter location aided rebroadcast point 1-OF of electrically operated institution DC1;
2) in the 2# wire inlet loop, be provided with the normally closed point of contact unit auxiliary relay KA3 and 1# inlet wire auxiliary relay KA1 in the control loop of the under-voltage release 2-MN of interchange breaker of plastic casing 2-Q1, the closing circuit A2 that exchanges the electrically operated institution DC2 of breaker of plastic casing 2-Q1 is provided with the normally closed point of contact unit auxiliary relay KA3, establishes switch knob 2-SB1 on the closing circuit A2 of electrically operated institution DC2; Establish opening button 2-SB2 on the sub-gate circuit A4 of electrically operated institution DC2;
Establish the normally closed point of fault trip point 2-SDE on the fault interlock circuit B2 of electrically operated institution DC2, be located in the current supply circuit of malfunction indicator lamp 2-H3 the normal battle of fault trip point 2-SDE;
The control loop of auxiliary relay KA2 coil is provided with deciliter location aided rebroadcast point 2-OF of electrically operated institution DC2;
3) in the contact loop, the control loop that exchanges the under-voltage release 3-MN of breaker of plastic casing 3-Q1 is provided with the normally closed point of 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1, the closing circuit A2 that exchanges the electrically operated institution DC3 of breaker of plastic casing 3-Q1 is respectively equipped with the normally closed point of 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1, establishes switch knob 3-SB1 and hand automatic selector switch 3-SB3 on the closing circuit A2 of electrically operated institution DC3; Establish opening button 3-SB2 on the sub-gate circuit A4 of electrically operated institution DC3;
Establish the normally closed point of fault trip point 3-SDE on the fault interlock circuit B2 of electrically operated institution DC3, be located in the current supply circuit of malfunction indicator lamp 3-H3 the normal battle of fault trip point 3-SDE;
The control loop of auxiliary relay KA3 coil is provided with deciliter location aided rebroadcast point 3-OF of electrically operated institution DC3.
Described interchange breaker of plastic casing 1-Q1,2-Q1 and 3-Q1 are the breaker of plastic casing that exchanges of plug-in type, charged behaviour mechanism, and supporting have a deciliter location aided rebroadcast point OF, fault trip point SDE and a under-voltage release MN.
Compared with prior art, the beneficial effects of the utility model are: 1) electrically operated institution and supporting component install to concentrate, easy to maintenance, manufacturing cost, operating cost, maintenance cost are cheap.2) the distribution control display is comprehensively clear, accurately obviously.3) exchange the main components such as breaker of plastic casing and all adopt plug-in, easy and simple to handle, monitor reliable in action.
Description of drawings
Fig. 1 is that two-way exchanges inlet wire, contact distribution loop schematic diagram;
Fig. 2 is 1# wire inlet loop embodiment electrical schematic diagram in the utility model;
Fig. 3 is 2# wire inlet loop embodiment electrical schematic diagram in the utility model;
Fig. 4 is contact loop embodiment electrical schematic diagram in the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Two-way of the present utility model exchanges inlet wire and contact distribution control loop, comprise 1# wire inlet loop, 2# wire inlet loop and contact loop, main feature is to arrange respectively to exchange breaker of plastic casing and supporting a deciliter location aided rebroadcast point OF, fault trip point SDE and under-voltage release MN arranged in described 1# wire inlet loop, 2# wire inlet loop and contact loop, make the contact loop when 1# wire inlet loop or 2# wire inlet loop break down, can realize automatic switchover, take the 380V system as example, its concrete control logic is:
1) in the 1# wire inlet loop such as Fig. 2, the normally closed point control that the under-voltage release 1-MN of interchange breaker of plastic casing 1-Q1 is got in touch with unit auxiliary relay KA3 and 2# inlet wire auxiliary relay KA2, the normally closed point control that the closing circuit A2 of the electrically operated institution DC1 of interchange breaker of plastic casing 1-Q1 is got in touch with unit auxiliary relay KA3, establish switch knob 1-SB1 on the closing circuit A2 of electrically operated institution DC1, by switch knob 1-SB1 closing by hand;
Establish opening button 1-SB2 on the sub-gate circuit A4 of electrically operated institution DC1, by opening button 1-SB2 manual brake separating;
Establish the normally closed point of fault trip point 1-SDE on the fault interlock circuit B2 of electrically operated institution DC1, be located in the current supply circuit of malfunction indicator lamp 1-H3 the normal battle of fault trip point 1-SDE;
Deciliter location aided rebroadcast point 1-OF control auxiliary relay KA1 of electrically operated institution DC1 is as the interlocking contact in 2# wire inlet loop and contact loop;
Also be provided with in the circuit and exchange breaker of plastic casing 1-Q1 separating brake indicator light 1-H2, combined floodgate indicator light 1-H1, show the closing of circuit breaker 1-Q1, minute state.
2) in the 2# wire inlet loop such as Fig. 3, the normally closed point control that the under-voltage release 2-MN of interchange breaker of plastic casing 2-Q1 is got in touch with unit auxiliary relay KA3 and 1# inlet wire auxiliary relay KA1, the normally closed point control that the closing circuit A2 of the electrically operated institution DC2 of interchange breaker of plastic casing 2-Q1 is got in touch with unit auxiliary relay KA3, establish switch knob 2-SB1 on the closing circuit A2 of electrically operated institution DC2, by switch knob 2-SB1 closing by hand;
Establish opening button 2-SB2 on the sub-gate circuit A4 of electrically operated institution DC2, by opening button 2-SB2 manual brake separating;
Establish the normally closed point of fault trip point 2-SDE on the fault interlock circuit B2 of electrically operated institution DC2, be located in the current supply circuit of malfunction indicator lamp 2-H3 the normal battle of fault trip point 2-SDE;
Deciliter location aided rebroadcast point 2-OF control auxiliary relay KA2 of electrically operated institution DC2 is as the interlocking contact in 1# wire inlet loop and contact loop;
Be provided with in the circuit and exchange breaker of plastic casing 2-Q1 separating brake indicator light 2-H2, combined floodgate indicator light 2-H1, show the closing of circuit breaker 2-Q1, minute state.
3) in the contact loop such as Fig. 4, the under-voltage release 3-MN that exchanges breaker of plastic casing 3-Q1 is subjected to the normally closed point control of 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1, the closing circuit A2 that exchanges the electrically operated institution DC3 of breaker of plastic casing 3-Q1 is subjected to respectively the control of the normally closed point of 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1, establish switch knob 3-SB1 and hand automatic selector switch 3-SB3 on the closing circuit A2 of electrically operated institution DC3, when the hand automatic selector switch is in manual state, by switch knob 3-SB1 closing by hand; When the hand automatic selector switch was in auto state, the interlocked control of the normally closed point by 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1 was carried out automatic closing.Establish opening button 3-SB2 on the sub-gate circuit A4 of electrically operated institution DC3, by opening button 3-SB2 manual brake separating;
Establish the normally closed point of fault trip point 3-SDE on the fault interlock circuit B2 of electrically operated institution DC3, be located in the current supply circuit of malfunction indicator lamp 3-H3 the normal battle of fault trip point 3-SDE;
Deciliter location aided rebroadcast point 3-OF control auxiliary relay KA3 of electrically operated institution DC3 is as the interlocking contact of 1# wire inlet loop and 2# wire inlet loop.
Fuse RD1 accesses one section power supply, fuse RD2 accesses two sections power supplies, no matter consist of the commutation circuit of controlling power supply by relay K A4, be 1# wire inlet loop or 2# wire inlet loop dead electricity, makes the interchange breaker of plastic casing 3-Q1 in contact loop that reliable control power supply can both be arranged.Be provided with the separating brake indicator light 3-H2, the combined floodgate indicator light 3-H1 that exchange breaker of plastic casing 3-Q1 in the circuit, show the closing of circuit breaker 3-Q1, minute state.
Interchange breaker of plastic casing 1-Q1,2-Q1 among the embodiment and 3-Q1 are the breaker of plastic casing that exchanges of plug-in type, charged behaviour mechanism, and supporting have OF deciliter location aided rebroadcast point, SDE fault trip point and a MN under-voltage release, and its characteristics have:
1. plug in construction, incoming power need not have a power failure, and only needs breaker open operation, just breaker body can be pulled up and overhaul;
2. the charged behaviour DC of mechanism can carry out far distance automatic controlling to circuit breaker, without the handle divide-shut brake;
3. be with MN under voltage trip gear, this under voltage tripping coil access power supply can carry out just that circuit breaker closes, separating brake control; Do not access power supply, circuit breaker does not close, and makes circuit breaker be in all the time gate-dividing state; The circuit breaker of "on" position, when this coil power suddenly disappears, circuit breaker is separating brake at once;
4. be with SDE fault trip indication contact, when break down in circuit breaker inside, this contact upset.
When the utility model is used, take the 380V circuit common as example, automatically switch in two kinds of situation:
1) the 2# inlet wire of the 1# inlet wire of power supply 1 and power supply 2 has electricity, under voltage device 1-MN, the 2-MN that exchanges breaker of plastic casing 1-Q1,2-Q1 all electric, press respectively separately switch knob, 1-Q1,2-Q1 are closed a floodgate, indicator light 1-H1, the luminous expression of 2-H1 1-Q1,2-Q1 close a floodgate simultaneously;
After exchanging breaker of plastic casing 1-Q1,2-Q1 combined floodgate, auxiliary relay KA1, KA2 disconnect, and can't close a floodgate so that exchange breaker of plastic casing 3-Q1, and system is in the normal power supply state.
After exchanging breaker of plastic casing 1-Q1,2-Q1 combined floodgate, for avoiding power supply 1 or power supply 2 in running, there is a power supply to suddenly disappear, the 3-SB3 that exchanges breaker of plastic casing 3-Q1 must be cut " automatic closing " state that forwards to.If power supply 1 and power supply 2 have a power supply to suddenly disappear, namely exchange breaker of plastic casing 1-Q1,2-Q1 a unexpected separating brake is arranged, the normally closed point of relay K A1 or KA2 is connected under voltage device 3-MN and the automatic closing loop that exchanges breaker of plastic casing 3-Q1 automatically, make to exchange breaker of plastic casing 3-Q1 automatic closing, guarantee to exchange breaker of plastic casing 3-Q1 to one section power supply or to two sections power supplies.
When the power supply that suddenly disappears recovers again, the 3-SB3 that exchanges breaker of plastic casing 3-Q1 is cut " closing by hand " state that forwards to, make by opening button 3-SB2 to exchange breaker of plastic casing 3-Q1 separating brake, combined floodgate indicator light 3-H1 goes out, and 3-H2 is bright for the separating brake indicator light.At once the interchange breaker of plastic casing 1-Q1 or the 2-Q1 that by switch knob power supply are recovered again close a floodgate again, and this device is in again the normal power supply state.
2) power supply 1 has electricity, and power supply 2 is without electricity.The contact loop exchanges breaker of plastic casing 3-Q1, power supply 1 inlet wire exchanges breaker of plastic casing 1-Q1 does not all have to close a floodgate.Power supply 2 inlet wires exchange breaker of plastic casing 2-Q1 without the control power supply, so do not possess the combined floodgate condition.The under voltage device 1-MN of interchange breaker of plastic casing 1-Q1 gets electric, then presses switch knob 1-SB1, makes to exchange breaker of plastic casing 1-Q1 combined floodgate, and the simultaneously luminous expression of indicator light 1-H1 exchanges breaker of plastic casing 1-Q1 and closes a floodgate, and begins to one section power supply.
The contact loop exchanges under voltage device 3-MN, closing by hand loop, the automatic closing loop of breaker of plastic casing 3-Q1, is exchanged the normally closed some connection of auxiliary relay KA2 that breaker of plastic casing is controlled by the 2# inlet wire.If at this moment closing by hand contact loop exchanges breaker of plastic casing 3-Q1, when hand automatic closing change over switch 3-SB3 cuts when forwarding " closing by hand " state to, exchanging breaker of plastic casing 3-Q1 by switch knob 3-SB1 contact loop can close a floodgate.Indicator light 3-H1 is luminous simultaneously, and expression exchanges breaker of plastic casing 3-Q1 and closes a floodgate, and begins to two sections power supplies.
When hand automatic closing change over switch 3-SB3 cuts when forwarding " automatic closing " state to, after exchanging breaker of plastic casing 1-Q1 and closing a floodgate, the contact loop exchanges breaker of plastic casing 3-Q1 just " automatic closing ".Indicator light 3-H1 is luminous simultaneously, and expression 3-Q1 closes a floodgate, and begins to two sections power supplies.
Because power supply 2 has electricity, power supply 1 electroless state and in like manner above-mentioned, just need not to sew here to have stated.
Claims (2)
1. two-way exchanges inlet wire and contact distribution control loop, comprise 1# wire inlet loop, 2# wire inlet loop and contact loop, it is characterized in that arrange respectively and exchange breaker of plastic casing and corollary apparatus, its concrete structure is in described 1# wire inlet loop, 2# wire inlet loop and contact loop:
1) in the 1# wire inlet loop, be provided with the normally closed point of contact unit auxiliary relay KA3 and 2# inlet wire auxiliary relay KA2 in the control loop of the under-voltage release 1-MN of interchange breaker of plastic casing 1-Q1, be provided with the normally closed point of contact unit auxiliary relay KA3 among the closing circuit A2 of the electrically operated institution DC1 of interchange breaker of plastic casing 1-Q1, establish switch knob 1-SB1 on the closing circuit A2 of electrically operated institution DC1; Establish opening button 1-SB2 on the sub-gate circuit A4 of electrically operated institution DC1;
Establish the normally closed point of fault trip point 1-SDE on the fault interlock circuit B2 of electrically operated institution DC1, be located in the current supply circuit of malfunction indicator lamp 1-H3 the normal battle of fault trip point 1-SDE;
The control loop of auxiliary relay KA1 coil is provided with deciliter location aided rebroadcast point 1-OF of electrically operated institution DC1;
2) in the 2# wire inlet loop, be provided with the normally closed point of contact unit auxiliary relay KA3 and 1# inlet wire auxiliary relay KA1 in the control loop of the under-voltage release 2-MN of interchange breaker of plastic casing 2-Q1, the closing circuit A2 that exchanges the electrically operated institution DC2 of breaker of plastic casing 2-Q1 is provided with the normally closed point of contact unit auxiliary relay KA3, establishes switch knob 2-SB1 on the closing circuit A2 of electrically operated institution DC2; Establish opening button 2-SB2 on the sub-gate circuit A4 of electrically operated institution DC2;
Establish the normally closed point of fault trip point 2-SDE on the fault interlock circuit B2 of electrically operated institution DC2, be located in the current supply circuit of malfunction indicator lamp 2-H3 the normal battle of fault trip point 2-SDE;
The control loop of auxiliary relay KA2 coil is provided with deciliter location aided rebroadcast point 2-OF of electrically operated institution DC2;
3) in the contact loop, the control loop that exchanges the under-voltage release 3-MN of breaker of plastic casing 3-Q1 is provided with the normally closed point of 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1, the closing circuit A2 that exchanges the electrically operated institution DC3 of breaker of plastic casing 3-Q1 is respectively equipped with the normally closed point of 2# inlet wire auxiliary relay KA2 and 1# inlet wire auxiliary relay KA1, establishes switch knob 3-SB1 and hand automatic selector switch 3-SB3 on the closing circuit A2 of electrically operated institution DC3; Establish opening button 3-SB2 on the sub-gate circuit A4 of electrically operated institution DC3;
Establish the normally closed point of fault trip point 3-SDE on the fault interlock circuit B2 of electrically operated institution DC3, be located in the current supply circuit of malfunction indicator lamp 3-H3 the normal battle of fault trip point 3-SDE;
The control loop of auxiliary relay KA3 coil is provided with deciliter location aided rebroadcast point 3-OF of electrically operated institution DC3.
2. two-way according to claim 1 exchanges inlet wire and contact distribution control loop, it is characterized in that, described interchange breaker of plastic casing 1-Q1,2-Q1 and 3-Q1 are the breaker of plastic casing of plug-in type, charged behaviour mechanism, and supporting have a deciliter location aided rebroadcast point OF, fault trip point SDE and a under-voltage release MN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147190 CN203243111U (en) | 2013-03-28 | 2013-03-28 | Control loop for two-path alternating-current wire incoming and communication power distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147190 CN203243111U (en) | 2013-03-28 | 2013-03-28 | Control loop for two-path alternating-current wire incoming and communication power distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243111U true CN203243111U (en) | 2013-10-16 |
Family
ID=49320369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320147190 Expired - Lifetime CN203243111U (en) | 2013-03-28 | 2013-03-28 | Control loop for two-path alternating-current wire incoming and communication power distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243111U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882312A (en) * | 2015-05-29 | 2015-09-02 | 珠海星玛智能电气有限公司 | Unlocking device used for three-in-two switch cabinet |
-
2013
- 2013-03-28 CN CN 201320147190 patent/CN203243111U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882312A (en) * | 2015-05-29 | 2015-09-02 | 珠海星玛智能电气有限公司 | Unlocking device used for three-in-two switch cabinet |
| CN104882312B (en) * | 2015-05-29 | 2017-05-10 | 星玛智能电气有限公司 | Unlocking device used for three-in-two switch cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107171431B (en) | Uninterrupted power regulating equipment, uninterrupted power regulating system and uninterrupted power regulating control method | |
| CN104092300A (en) | 10kV handcart type high-voltage switch cabinet brake-separating monitoring loop | |
| CN103199614B (en) | Two-way alternating current inlet wire and connection power distribution control method | |
| CN203192640U (en) | Interlocking device of high-voltage stationary cabinet | |
| CN106655898B (en) | Reactor cabinet control circuit | |
| CN203205987U (en) | Device for remote control operation of circuit breaker for power supply of motor with isolating switch | |
| CN202260153U (en) | Low voltage distribution two-input one-connect electrical interlock system | |
| CN202634058U (en) | Low-voltage household distribution box with power-down automatic illuminating apparatus | |
| CN203243111U (en) | Control loop for two-path alternating-current wire incoming and communication power distribution | |
| CN202917961U (en) | Self-recovery type over-voltage and under-voltage protection circuit breaker | |
| CN101728773B (en) | Full-adaptive high-voltage switch controller based on light-coupled control | |
| CN201717670U (en) | Dual-power-supply switching device with overvoltage protection | |
| CN203871919U (en) | Fast switching system of power sources | |
| CN203014477U (en) | Automatic switching control device for alternating current lighting power failure | |
| CN202190004U (en) | Low voltage power distribution cabinet control circuit | |
| CN203760403U (en) | Circuit breaker with time relay | |
| CN204794329U (en) | Single -phase electric dual supply automatic switching control equipment | |
| CN208874346U (en) | Packing machine power control and packing machine | |
| CN202067694U (en) | Control circuit of change-over switch | |
| CN102157283A (en) | Control circuit for transfer switch | |
| CN207559538U (en) | A kind of three-phase automatic reclosing device with wireless communication function | |
| CN202094037U (en) | On-load switchingin or switchingoff prevention isolating switch for box substation | |
| CN201797292U (en) | Reverse power relay with overcurrent | |
| CN204905849U (en) | User boundary switch controller | |
| CN201611770U (en) | Automatic phase-failure power-off protection device for three-phase motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131016 |