CN220775403U - Oil well delay compensation energy-saving control circuit - Google Patents
Oil well delay compensation energy-saving control circuit Download PDFInfo
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- CN220775403U CN220775403U CN202322362011.1U CN202322362011U CN220775403U CN 220775403 U CN220775403 U CN 220775403U CN 202322362011 U CN202322362011 U CN 202322362011U CN 220775403 U CN220775403 U CN 220775403U
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- 239000003129 oil well Substances 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 abstract description 55
- 238000005086 pumping Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to an oil well delay compensation energy-saving control circuit, and belongs to the technical field of oil pumping machine electrical equipment control. The circuit comprises a primary loop and a secondary loop for controlling the primary loop, wherein the primary loop comprises a capacitance compensation loop for improving the power factor of a motor, the secondary loop comprises a capacitance compensation control loop for controlling the capacitance compensation loop, the capacitance compensation loop comprises N capacitance compensation branches connected in parallel, N is more than or equal to 2, each capacitance compensation branch comprises a contact switch and a compensation capacitor which are connected in series and used for switching a capacitance contactor, and the capacitance values of the compensation capacitors of the branches are different; the capacitance compensation control loop comprises N corresponding capacitance compensation control branches, and each capacitance compensation control branch controls a contact switch of a switching capacitance contactor in the corresponding capacitance compensation branch through a switching capacitance contactor coil part so as to realize switching of the capacitance compensation branch. The circuit not only improves the power factor of the motor, but also can adjust the power factor.
Description
Technical Field
The utility model relates to an oil well delay compensation energy-saving control circuit, and belongs to the technical field of oil pumping machine electrical equipment control.
Background
The power factor of the current pumping unit motor is generally lower, the power factor of the pumping unit motor is between 0.2 and 0.6 through testing, the power factor of the national standard motor cannot be lower than 0.85, the power factor is too low, the electric energy utilization rate is low, a power grid is required to provide large current for supplying electric energy required by pumping equipment, and the electric energy loss of a circuit is increased, so that an oil well delay compensation energy-saving cabinet is required to be developed to improve the power factor of the motor. The utility model patent document with publication number of CN217282760U discloses a motor control circuit of an oil pumping machine. The method is based on a mode that the motor control circuit and the capacitance compensation circuit are connected in parallel to improve the power factor, and meanwhile, the motor control circuit of the oil pumping unit can be subjected to current protection and overpower protection, but the existing circuit can only improve the power factor to a certain set value, and cannot be matched with a proper compensation capacitor to adjust the power factor according to the actual running state, if the power factor is set too high, the motor is unstable and oscillates, and the service life of the motor is further influenced.
Disclosure of Invention
The utility model aims to provide an oil well delay compensation energy-saving control circuit which is used for solving the problem that the power factor cannot be regulated by the existing oil pumping machine motor control circuit.
In order to achieve the above object, the present utility model provides a method comprising:
the utility model relates to an oil well delay compensation energy-saving control circuit, which comprises a primary loop and a secondary loop for controlling the primary loop, wherein the primary loop comprises a capacitance compensation loop for improving the power factor of a motor, the secondary loop comprises a capacitance compensation control loop for controlling the capacitance compensation loop, the capacitance compensation loop comprises N capacitance compensation branches connected in parallel, N is more than or equal to 2, each capacitance compensation branch comprises a contact switch and a compensation capacitor which are connected in series and used for switching a capacitance contactor, and the capacitance values of the compensation capacitors of the branches are different; the capacitance compensation control loop comprises N corresponding capacitance compensation control branches, and each capacitance compensation control branch controls a contact switch of a switching capacitance contactor in the corresponding capacitance compensation branch through a switching capacitance contactor coil part so as to realize switching of the capacitance compensation branch.
The beneficial effects are that: the utility model relates to an oil well delay compensation energy-saving control circuit, which is used in a capacitance compensation loop for improving a power factor and comprises at least two capacitance compensation branches connected in parallel, wherein the capacitance values of compensation capacitors of all the branches are different, the number of capacitance compensation control branches of the capacitance compensation loop is controlled to correspond to that of the capacitance compensation branches, the contact switch of a switching capacitance contactor in the corresponding capacitance compensation branch is controlled by switching a coil part of a capacitance contactor, so that the switching of the capacitance compensation branch is realized, and the charge and discharge of the compensation capacitor in the capacitance compensation branch are further realized.
Further, the capacitive compensation control loop also comprises a reactive power compensation controller, wherein the input end of the reactive power compensation controller is used for being connected to a current transformer and a voltage transformer so as to obtain a single-phase current value and a three-phase voltage value of the incoming line end of the motor, and the output end of the reactive power compensation controller is connected to each capacitive compensation control branch.
The beneficial effects are that: the capacitance compensation control loop also comprises a reactive power compensation controller, the reactive power compensation controller obtains a current value and a three-phase voltage value of a motor inlet end A phase through a current transformer, automatically judges the capacitance required by the motor system according to the obtained current value and the three-phase voltage value of the motor inlet end A phase, automatically judges a capacitance compensation branch needing to be output, and controls the capacitance compensation control branch of the branch. The quantity and the compensation capacity of the capacitor put into operation are automatically controlled through the reactive power compensation controller, and staff operation is not needed.
Further, each capacitance compensation control branch circuit comprises a manual switch and a coil part for switching a capacitance contactor which are connected in series.
The beneficial effects are that: the capacitance compensation control branch circuit can control the capacitance compensation loop through operating the manual switch, and the control is accurate.
Further, a change-over switch is arranged between the reactive power compensation controller and the capacitance compensation control branch circuits, a common end of the change-over switch is connected with a power supply, a first free end is used for being connected to an input end of the reactive power compensation controller, a second free end is connected to each capacitance compensation control branch circuit, and the capacitance compensation control branch circuits comprise a manual switch and a coil part for switching a capacitance contactor, wherein the manual switch and the coil part are connected in series.
The beneficial effects are that: a change-over switch is arranged between the reactive power compensation controller and the capacitance compensation control branch, and automatic control or manual control can be selected through the change-over switch. The utility model provides a plurality of control modes, has the selectivity and can be selected according to actual conditions.
Further, each capacitance compensation control branch is further connected in series with a thermal overload relay contact switch, and a coil part of the load relay is arranged in the corresponding capacitance compensation branch.
The beneficial effects are that: each capacitance compensation control branch is also provided with a thermal overload relay contact switch in series, a coil part responsible for controlling the thermal overload relay is positioned in the corresponding capacitance compensation branch, if the capacitance compensation current is overloaded, the thermal overload relay contact switch of the branch is disconnected, the thermal overload relay plays a role in thermally protecting the compensation capacitor, the compensation capacitor is prevented from being damaged due to overheat, and the electrical safety of the circuit is improved.
Further, both ends of the capacitance compensation control branch are connected with a capacitance running indicator lamp in parallel.
The beneficial effects are that: and the two ends of the capacitance compensation control branch are also connected with capacitance operation indicator lamps in parallel, so as to indicate the operation state of the capacitance compensation branch.
Further, the coil portion of the thermal overload relay is serially connected in the corresponding capacitance compensation branch.
The beneficial effects are that: and the thermal overload relay coil part in the capacitance compensation branch circuit is used for detecting whether the capacitance compensation current of the branch circuit is overloaded and controlling the action of the thermal overload relay contact switch to disconnect the branch circuit when the load is overloaded, so that the electrical safety is improved.
Further, the capacitance compensation loop further comprises a contact switch of a second alternating current contactor, one end of the contact switch of the second alternating current contactor is used for being connected to the motor control loop, the other end of the contact switch of the second alternating current contactor is connected to the capacitance compensation branch after being connected in parallel, and a coil part of the second alternating current contactor is arranged in the capacitance compensation control loop.
The beneficial effects are that: the contact switch of the second alternating current contactor of the capacitance compensation loop is the total switch of each capacitance compensation branch.
Further, the capacitance compensation control loop is powered by a three-phase alternating current power supply in the primary loop.
The beneficial effects are that: three groups of unidirectional alternating current power supplies led out from the primary loop provide power for a capacitance compensation control loop in the secondary loop, and the operation is simple and convenient.
Further, the capacitance compensation control loop also comprises an interlocking control branch connected in parallel with the capacitance compensation control branch, the interlocking control branch comprises a first branch and a second branch which are connected in parallel, the first branch comprises a series delay relay coil part and an auxiliary contact switch of a second alternating current contactor, and the second branch comprises a series delay relay contact switch and a second alternating current contactor coil part.
The beneficial effects are that: the interlocking control branch in the capacitance compensation control loop can realize interlocking through the delay relay and the second alternating current contactor, so that the safety of electric operation is ensured.
Drawings
FIG. 1 is a primary circuit in an embodiment of the utility model;
fig. 2 is a primary circuit in an embodiment of the utility model.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
An embodiment of an oil well delay compensation energy-saving control circuit:
the oil well delay compensation energy-saving control circuit as shown in fig. 1 and 2 comprises a primary loop and a secondary loop for controlling the primary loop, wherein the primary loop comprises a capacitance compensation loop for improving the power factor of a motor, and the secondary loop comprises a capacitance compensation control loop for controlling the capacitance compensation loop. The capacitance compensation loop comprises N capacitance compensation branches connected in parallel, N is more than or equal to 2, each capacitance compensation branch comprises a contact switch of a series-connected switching capacitance contactor and a compensation capacitor, and capacitance values of the compensation capacitors of the branches are different.
The capacitance compensation control loop comprises N corresponding capacitance compensation control branches, and each capacitance compensation control branch controls a contact switch of a switching capacitance contactor in the corresponding capacitance compensation branch through a switching capacitance contactor coil part, so as to control charge and discharge of each compensation capacitor, thereby realizing switching of the capacitance compensation branch.
As shown in fig. 1, the primary loop of the oil well delay compensation energy-saving control circuit comprises three-phase alternating current power supply wiring terminals PE, N, L1, L2 and L3 connected to an external circuit at a wire inlet end, a first circuit breaker QF1 is sequentially connected via the wire inlet terminal TC1, a main contact of a normally open contact switch of a first alternating current contactor KMa, and the other end of the main contact of the normally open contact switch of the first alternating current contactor KMa is connected with one end of a main contact of a normally open contact switch of a second alternating current contactor KMb. Meanwhile, the other end of the main contact of the normally open contact switch of the first alternating current contactor KMa is connected with an outgoing terminal TC2 and is connected with the engine M. The other end of the main contact of the normally open contact switch of the second ac contactor KMb is connected to each capacitance compensating branch.
The capacitance compensation branch circuit comprises a normally open contact switch of a switching capacitance contactor and a compensation capacitor, one end of the normally open contact switch of the switching capacitance contactor is connected to one end of a main contact of a normally open contact switch of a second alternating current contactor KMb, and the other end of the normally open contact switch of the switching capacitance contactor RJ is connected with the compensation capacitor.
The thermal overload relay RJ is connected in series between the switching capacitor contactor and the compensation capacitor, and the thermal overload relay coil is connected to the compensation capacitor through a normally open contact switch of the switching capacitor contactor and plays a role in thermal protection of the compensation capacitor.
In order to adapt to different motor power factors, the compensation capacitors with different capacitance values are connected in parallel and respectively controlled, for example, 5 groups of different compensation capacitors are used in the embodiment, which are respectively defined as a first compensation capacitor C1, a second compensation capacitor C2, a third compensation capacitor C3, a fourth compensation capacitor C4 and a fifth compensation capacitor C5. Correspondingly, 5 groups of switching capacitor contactors KM and thermal overload relays RJ are adopted, namely a first switching capacitor contactor KM1 and a first thermal overload relay RJ1, a second switching capacitor contactor KM2 and a second thermal overload relay RJ2, a third switching capacitor contactor KM3 and a third thermal overload relay RJ3, a fourth switching capacitor contactor KM4 and a fourth thermal overload relay RJ4, and a fifth switching capacitor contactor KM5 and a fifth thermal overload relay RJ5, wherein 5 groups of different compensation capacitors are respectively controlled.
The main contact of the normally closed contact of the second alternating current contactor KMb is used for overall control of the capacitance control loop, the other end of the normally open contact switch of the second alternating current contactor KMb is respectively connected with a first capacitance compensation branch (comprising a normally open contact switch of a first switching capacitance contactor KM1, a thermal overload relay RJ1 coil part and a compensation capacitor C1 which are sequentially connected in series), a second capacitance compensation branch (comprising a normally open contact switch of a second switching capacitance contactor KM2, a thermal overload relay RJ2 coil part and a compensation capacitor C2 which are sequentially connected in series), a third capacitance compensation branch (comprising a normally open contact switch of a third switching capacitance contactor KM3, a thermal overload relay RJ3 coil part and a compensation capacitor C3 which are sequentially connected in series), a fourth capacitance compensation branch (comprising a normally open contact switch of a fourth switching capacitance contactor KM4, a thermal overload relay RJ4 coil part and a compensation capacitor C4 which are sequentially connected in series), and a fifth capacitance compensation branch (comprising a normally open contact switch of a fifth switching capacitance contactor KM5, a thermal overload relay RJ5 coil part and a compensation capacitor C5 which are sequentially connected in series), and the five capacitance compensation branches are respectively controlled.
The outgoing line terminal of the circuit breaker QF1 is led out of a first a phase alternating current X1 to supply power for a start-stop loop in the secondary loop, and three groups of single-phase alternating current power supplies are led out of the other end of the main contact of the normally open contact switch KMa of the first alternating current contactor and are respectively a second a single-phase alternating current power supply X11, a second B single-phase alternating current power supply X12 and a second C single-phase alternating current power supply X13 to supply working power for a capacitance compensation control loop of the secondary loop.
As shown in fig. 2, the secondary circuit comprises a start-stop circuit for controlling the start and stop of the motor, a capacitance compensation control circuit for controlling the connection and disconnection of a compensation capacitor in the capacitance compensation circuit, the start-stop circuit is composed of a stop button SB1, a start button SB2 and a first ac contactor KMa coil which are connected in series, the stop button SB1 is connected with a normally closed contact, the start button SB2 is connected with a normally open contact switch-in circuit, a first contact of the stop button SB1 is connected with a first a phase ac X1 through a first fuse FU1, the other end of the first ac contactor coil is connected with a zero line N, and two ends of the start button SB2 are connected with auxiliary contacts of a normally open contact switch of the first ac contactor KMa in parallel, so that the self-locking function of the working mode is achieved.
The capacitance compensation control loop comprises capacitance compensation control branches, interlocking control branches and a reactive power compensation controller JKW, wherein the number of the capacitance compensation control branches corresponds to that of the capacitance compensation branches. The capacitance compensation control branch circuit comprises a manual switch and a coil part for switching the capacitance contactor which are connected in series. The embodiment provides three control modes, namely, only a manual switch is used for controlling a capacitance compensation control branch; secondly, the capacitance compensation control branch is controlled only by an automatic control mode (through a reactive power compensation controller JKW); finally, the automatic control and the manual control are switched through a change-over switch. In this embodiment, the automatic control and the manual control are switched by using the switch. The change-over switch can be a single-pole double-throw switch, an automatic manual change-over knob switch and the like, wherein the change-over switch in the embodiment adopts the automatic manual change-over knob switch.
The interlocking control branch circuit is connected in parallel with the capacitance compensation control branch circuit, and concretely comprises a first branch circuit and a second branch circuit, wherein the first branch circuit comprises a series-connected delay relay coil part and an auxiliary contact switch of a second alternating current contactor, and the second branch circuit comprises a series-connected delay relay contact switch and a coil part of the second alternating current contactor, so that interlocking is formed.
Specifically, as shown in fig. 2, a second a single-phase ac power source X11 led out from the primary circuit is connected to a common end SA-1 of an automatic manual switching knob switch SA through a fourth fuse FU4, the common end SA-1 of the automatic manual switching knob switch SA is connected to one end of a normally-closed end of a second ac contactor KMb, the other end of the normally-closed end of the second ac contactor KMb is connected to a zero line N through a delay relay KT coil, and both ends of the delay relay KT coil are connected in parallel to a power indicator HG.
The public end SA-1 of the automatic manual switching knob switch SA is connected with one end of the normal start end of the delay relay KT, the other end of the normal start end of the delay relay KT is connected to a zero line N through a coil of a second alternating current contactor KMb, two ends of the coil of the second alternating current contactor KMb are connected with an operation indicator lamp HR in parallel, and a normally open contact switch of an auxiliary contact of the second alternating current contactor KMb is connected with two ends of the normally open contact switch of the delay relay KT in parallel.
The manual ends (second free ends) SA-2 of the automatic manual switching knob switch SA are respectively connected with the first ends of five manual switches, wherein the five manual switches are respectively a first manual switch SA1, a second manual switch SA2, a third manual switch SA3, a fourth manual switch SA4 and a fifth manual switch SA5. The second end of the first manual switch SA1 in the first capacitance compensation control branch is connected with one end of a normally closed contact of the first thermal overload relay RJ1 through a coil of the first switching capacitance contactor KM1, the other end of the normally closed contact of the first thermal overload relay RJ1 is connected with a zero line N, a first capacitance indicator HW1 is connected in parallel between a second terminal of the first manual switch SA1 and the zero line N, and the other end of the first manual switch SA1 is simultaneously connected with a first output end out1 of the reactive power compensator JKW. In the same way, the second manual switch SA2 connects the second switched capacitor contactor KM2, the second thermal overload relay RJ2, the second capacitive indicator lamp HW2 and the second output out2 of the reactive power compensator JKW; the third manual switch SA3 is connected with a third switching capacitor contactor KM3, a third thermal overload relay RJ3, a third capacitance indicator HW3 and a third output end out3 of the reactive power compensator JKW; the fourth manual switch SA4 is connected with a fourth switching capacitor contactor KM4, a fourth thermal overload relay RJ4, a fourth capacitance indicator HW4 and a fourth output end out4 of the reactive power compensator JKW; the fifth manual switch SA5 is connected to the fifth switched capacitor contactor KM5, the fifth thermal overload relay RJ5, the fifth capacitive indicator HW5 and the fifth output out5 of the reactive power compensator JKW.
The automatic end (first free end) SA-3 of the automatic manual switching knob switch SA is connected with a first voltage input end V of the reactive power compensator JKW, a second single-phase alternating-current power supply X12 is connected with a second voltage input end Ub of the reactive power compensator JKW through a second fuse FU2, a third single-phase alternating-current power supply X13 is connected with a third voltage input end Uc of the reactive power compensator JKW through a third fuse FU3, a first single-phase alternating-current power supply X1, a second single-phase alternating-current power supply X12 and a third single-phase alternating-current power supply X13 provide working voltage for the reactive power compensator JKW.
The current input end of the reactive power compensation controller collects the phase A current of the motor input end, the current transformer LHa takes the phase A current of the motor input end, and the current input ends Ia and In of the reactive power compensator JKW are connected.
The working principle and working process of the circuit of the embodiment are as follows:
closing the breaker QF1, opening the starting button SB2, electrifying the coil of the first alternating current contactor KMa, closing the main contact of the normally closed contact of the first alternating current contactor KMa in the first circuit, and starting the motor. The normally closed auxiliary contact of the first alternating current contactor KMa in the second loop is closed, and the start-stop loop enters a self-locking state.
After the starting button SB2 is started, the branches 01-07 are connected, the power indicator HG is lighted, the delay relay KT is started, after a certain time delay, the normally open contact switch of the delay relay KT is closed, the branches 01-09 are connected, the coil of the second alternating current contactor KMb is electrified, the auxiliary contact of the second alternating current contactor KMb in the second circuit is closed, the working power supply HR is lighted, and the main contact of the second alternating current contactor KMb in the primary circuit is closed.
At this time, if a manual working mode is adopted, a switch of the automatic manual switching knob switch SA is shifted to a manual end SA-2, a common end SA-1 is connected with the manual end SA-2, a manual working mode is started, different compensation capacitors are started according to the matched capacitors required, if the required capacity is 25Kvar, a first manual switch SA1 can be closed, a branch 01-11 is connected, a coil of a first switching capacitor contactor KM1 is electrified, a normally open contact switch of the first switching capacitor contactor KM1 is attracted, three-phase electricity in a first loop is charged for a first compensation capacitor C1 through a coil of a first thermal overload relay RJ1, and meanwhile, a first capacitor operation indicator HW1 is lighted. If the capacitance compensation current is overloaded, the heating of the first thermal overload relay RJ1 is increased, the temperature is increased, the main bimetallic strip is bent, the normally closed contact of the first thermal overload relay RJ1 is pushed to be disconnected through the transmission mechanism, the first switching capacitance contactor KM1 is disconnected, the compensation work of the compensation capacitor is stopped, and the fact that the electric potential safety hazard of the compensation capacitor cannot occur is guaranteed.
The two manual switches can be simultaneously turned on, if the required capacity is 30Kvar, the first manual switch SA1 and the fourth manual switch SA4 can be turned on, and the second manual switch SA2 and the third manual switch SA3 can be turned on, so that the working principle is the same, and the details are not repeated here.
If an automatic working mode is adopted, a public end SA-1 of the automatic manual switching knob switch SA is connected with an automatic end SA-3, an automatic working mode is started, the automatic switching mode respectively takes current values of phase A current and three-phase voltage values V, ub and Uc of an original motor control distribution box incoming line end A according to a current transformer Lha and a voltage transformer, a reactive power compensator JKW can judge power factors according to phases of three-phase voltage values V, ub, uc and phase A current in a circuit and automatically judge capacity values required by a system, capacitor branches needing to be output can be automatically judged, the number and compensation capacity of capacitors to be put into operation can be automatically controlled, then different compensation capacitors are charged, and the working principle is the same as a manual switching principle.
Claims (10)
1. The oil well delay compensation energy-saving control circuit comprises a primary loop and a secondary loop for controlling the primary loop, wherein the primary loop comprises a capacitance compensation loop for improving the power factor of a motor, and the secondary loop comprises a capacitance compensation control loop for controlling the capacitance compensation loop; the capacitance compensation control loop comprises N corresponding capacitance compensation control branches, and each capacitance compensation control branch controls a contact switch of a switching capacitance contactor in the corresponding capacitance compensation branch through a switching capacitance contactor coil part so as to realize switching of the capacitance compensation branch.
2. The oil well delay compensation energy-saving control circuit according to claim 1, wherein the capacitance compensation control loop further comprises a reactive power compensation controller, an input end of the reactive power compensation controller is used for being connected to a current transformer and a voltage transformer to obtain a single-phase current value and a three-phase voltage value of a motor inlet end, and an output end of the reactive power compensation controller is connected to each capacitance compensation control branch.
3. The oil well delay compensation energy saving control circuit of claim 1, wherein each capacitance compensation control branch comprises a manual switch in series, a coil portion of a switched capacitance contactor.
4. The oil well delay compensation energy-saving control circuit according to claim 2, wherein a change-over switch is arranged between the reactive power compensation controller and the capacitance compensation control branch circuits, a common end of the change-over switch is connected with a power supply, a first free end is used for being connected to an input end of the reactive power compensation controller, a second free end is connected to each capacitance compensation control branch circuit, and the capacitance compensation control branch circuits comprise a manual switch and a coil part for switching capacitance contactors which are connected in series.
5. A time delay compensating energy saving control circuit for an oil well as claimed in claim 3, wherein each capacitive compensating control branch is further provided in series with a thermal overload relay contact switch, the coil portion of the load relay being disposed in the corresponding capacitive compensating branch.
6. The oil well delay compensation energy-saving control circuit according to claim 3 or 5, wherein both ends of the capacitance compensation control branch are connected with capacitance running indicator lamps in parallel.
7. The oil well delay compensating energy saving control circuit of claim 5, wherein the coil portion of the thermal overload relay is strung in a corresponding capacitive compensating branch.
8. A well delay compensating energy saving control circuit according to claim 1 or 3, characterized in that the capacitance compensating circuit further comprises a contact switch of a second ac contactor, one end of the contact switch of the second ac contactor being for connection to the motor control circuit and the other end being connected to the parallel connected capacitance compensating branch, the coil part of the second ac contactor being arranged in the capacitance compensating control circuit.
9. A well delay compensating energy saving control circuit as claimed in claim 3, wherein the capacitance compensating control loop is powered by a three phase ac power supply in the primary loop.
10. The oil well delay compensation energy saving control circuit of claim 8, further comprising an interlock control branch connected in parallel with the capacitance compensation control branch in the capacitance compensation control loop, the interlock control branch comprising a first branch and a second branch connected in parallel, the first branch comprising a delay relay coil portion and an auxiliary contact switch of a second ac contactor connected in series, the second branch comprising a contact switch of a delay relay and a coil portion of a second ac contactor connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362011.1U CN220775403U (en) | 2023-08-31 | 2023-08-31 | Oil well delay compensation energy-saving control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362011.1U CN220775403U (en) | 2023-08-31 | 2023-08-31 | Oil well delay compensation energy-saving control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220775403U true CN220775403U (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322362011.1U Active CN220775403U (en) | 2023-08-31 | 2023-08-31 | Oil well delay compensation energy-saving control circuit |
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| Country | Link |
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| CN (1) | CN220775403U (en) |
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- 2023-08-31 CN CN202322362011.1U patent/CN220775403U/en active Active
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