CN218783620U

CN218783620U - Three-incoming-line one-bus-coupler automatic change-over switch electrical interlocking control circuit

Info

Publication number: CN218783620U
Application number: CN202222778682.1U
Authority: CN
Inventors: 刘博�; 刘琦; 董跃先
Original assignee: Schneider Wingoal Tianjin Electric Equipment Co Ltd
Current assignee: Schneider Wingoal Tianjin Electric Equipment Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-03-31
Anticipated expiration: 2032-10-21

Abstract

The utility model relates to an automatic change-over switch electric interlocking control circuit is joined in marriage to three inlet wires mothers, including one section generating line, the two-section generating line, respectively through Qs1 switch and Qs2 switch and one section generating line, two way commercial power transformer that the two-section generating line links to each other, stand-by power supply that is linked together through Qs3 switch and one section generating line or two-section generating line and with Qs1 switch, qs2 switch, the mothers that Qs3 switch links to each other allies oneself with the cabinet, mothers allies oneself with the cabinet and includes the controller, adapter and Qtie switch, qs1 switch, qs2 switch, qs3 switch, form electric interlocking through the adapter between the Qtie switch, the Qtie adapter is connected with the third party's power, qtie adapter and Qs1 adapter, qs2 adapter, form two return circuit looped netowrk electricity between Qs3 adapter and operate power supply circuit. The utility model discloses a strong and weak electric separation provides the chain reliability of electricity, has improved the reliability of electrical operation power again, and under the circumstances of the trouble that the controller probably exists, the adapter still can keep the reliable conversion of system under the on-the-spot condition.

Description

Three-incoming-line one-bus-coupler automatic change-over switch electrical interlocking control circuit

Technical Field

The utility model relates to an electrical equipment technical field especially relates to a three incoming line female automatic transfer switch electrical interlocking control circuit that allies oneself with.

Background

At present, in airport lighting stations, power supply offices and some ultra-large building industries, a three-wire one-bus low-voltage distribution system with two mains supply single buses matched with an emergency power supply or a standby power supply in a segmented mode is generally adopted, so that the distribution system needs a power management system to automatically start an oil engine and automatically input an oil engine or other emergency power supplies or standby power supplies under the working condition that two mains supplies are in failure, and the oil engine can automatically stop after the mains supply is recovered and return to a mains supply mode. The system is provided with a single-bus segmented product for controlling two ways of mains supplies and one way of emergency power supply or standby power supply, namely three ways of power supplies can be monitored, a power supply conversion system of four switches is controlled simultaneously, the system is supplied with power by two ways of mains supply transformers in an automatic state, a two-inlet-one-bus main connection structure is realized, one way of diesel-electric generator car interface is reserved, and the three ways of power supplies can automatically complete conversion when any one way of power supply is required to be out of line and has a fault. Conventional scheme on the market today, like a two inlet wire female contact system and PLC control system, the former reliability of supplying power is low, in case double-circuit commercial power all breaks down, will appear having a power failure by a large scale, the latter manufacturing cost is high, needs realize electric interlocking through switch board overlap joint mode, overhauls the difficulty. Therefore, it is an urgent need for those skilled in the art to design an electrical interlock control circuit for a three-wire-in-one bus-coupled automatic transfer switch, which has low cost, high reliability and convenient maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a three incoming line female automatic transfer switch electrical interlocking control circuit that allies oneself with.

The utility model discloses a realize through following technical scheme:

the utility model provides a three inlet wire one bus-coupler automatic change-over switch electric interlocking control circuit, includes one section generating line, two section generating lines, two way commercial power transformer that links to each other with one section generating line, two section generating lines through Qs1 switch and Qs2 switch respectively, through the stand-by power supply that Qs3 switch and one section generating line or two section generating lines are linked together and with the bus-coupler cabinet that Qs1 switch, qs2 switch, qs3 switch link to each other, the bus-coupler cabinet includes controller, adapter and Qtie switch, form electric interlocking through the adapter between Qs1 switch, qs2 switch, qs3 switch, the Qtie switch.

According to the above technical solution, preferably, the adapter includes a Qs1 adapter, a Qs2 adapter, a Qs3 adapter and a Qtie adapter respectively connected to the controller, and a dual-loop looped network electrical interlock circuit is formed between the Qs1 adapter, the Qs2 adapter, the Qs3 adapter and the Qtie adapter.

According to the above technical solution, preferably, the Qtie adapter is connected to a third party power supply through a P1 port and a P2 port, and the Qtie adapter forms a power supply circuit of the dual-loop ring network electrically operated power supply with the Qs1 adapter, the Qs2 adapter and the Qs3 adapter through an E port.

According to the above technical solution, preferably, the Qs1 adapter is connected to the Qs1 switch through a B port, the Qs2 adapter is connected to the Qs2 switch through a B port, the Qs3 adapter is connected to the Qs3 switch through a B port, and the Qtie adapter is connected to the Qtie switch through a B port.

According to the above technical solution, preferably, the dual-loop looped network electrical interlock circuit includes a Qs1 closing loop, a Qs2 closing loop, a Qtie closing loop and a Qs3 closing loop, which are arranged in parallel.

According to the above technical solution, preferably, the Qs1 closing loop includes a 1KA contact, an OF contact OF a Qs3 switch, an OF contact OF a Qs2 switch and an OF contact OF a Qtie switch which are connected in series in sequence, and a PF contact OF the Qs1 switch, the Qs2 closing loop includes a 2KA contact, an OF contact OF a Qs3 switch, an OF contact OF a Qs1 switch and an OF contact OF a Qtie switch which are connected in series in sequence, and an PF contact OF a Qs2 switch, the Qtie closing loop includes a 3KA contact, an OF contact OF a Qs1 switch and an OF contact OF a Qs2 switch which are connected in series in sequence, and a PF contact OF a Qtie switch, and the Qs3 closing loop includes a 4KA contact, an OF contact OF a Qs1 switch, an OF contact OF a Qs2 switch and a PF contact OF a Qs3 switch which are connected in series in sequence.

According to the above technical solution, preferably, the controller is connected to the a port and the C port of the Qs1 adapter through the 1A port and the 1C port, the controller is connected to the a port and the C port of the Qs2 adapter through the 2A port and the 2C port, the controller is connected to the C port of the Qtie adapter through the 3C port, and the controller is connected to the C port of the Qs3 adapter through the 4C port.

The utility model has the advantages that:

the utility model discloses an adapter carries out electrical interlocking signal and electrical operation power and carries out the redundant configuration of dicyclo net, has realized the strong and weak electricity separation promptly, provides the chain reliability of electricity, has improved the reliability of electrical operation power again, under the condition of the trouble that the controller probably exists, the adapter still can keep the reliable conversion of system under the on-the-spot condition, makes the practicality of product obtain higher promotion, provides reliable electrical interlocking guarantee for the fortune in later stage is maintained.

Drawings

Fig. 1 is a schematic diagram of a three-line-one-bus-connection main wiring structure.

Fig. 2 is a schematic diagram of the control function of a three-input-one bus-coupled switch.

Fig. 3 is a schematic diagram of a three-wire-inlet one-bus-pair electric interlocking control circuit.

FIGS. 4-7 are schematic diagrams of the connections of the Qs1 adapter, qs2 adapter, qs3 adapter, and Qtie adapter.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments. Based on the embodiments in the utility model, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the utility model.

As shown in fig. 1, the utility model discloses a two way mains supply transformer that one section generating line, two section generating lines, pass through Qs1 switch and Qs2 switch and one section generating line, two section generating line link to each other respectively, through the stand-by power supply that Qs3 switch and one section generating line or two section generating line are linked together and with Qs1 switch, qs2 switch, the bus that Qs3 switch links to each other allies oneself with the cabinet, two way mains supply transformer are the common power supply of one section generating line and two section generating lines in this example, stand-by power supply prefers but not limited to emergency power source such as diesel generator, the bus allies oneself with the cabinet and includes controller, adapter and Qtie switch, form electric interlock through the adapter between Qs1 switch, qs2 switch, qs3 adapter and the Qtie adapter that link to each other with the controller respectively, the adapter includes Qs1 adapter, qs2 adapter, qs3 adapter and Qtie adapter, form two return circuit electric interlock circuit between Qs1 adapter, qs2 adapter, qs3 adapter and the Qtie adapter. Wherein, one section generating line and two-stage bus are being connected respectively at bus-tie Qtie switch both ends, for the interconnection switch of one section generating line and two-stage bus, the product can automatic switch when any transformer trouble all the way, each transformer can take both ends generating line power supply simultaneously, when two way commercial power outage simultaneously, under automatic status, one section generating line and two-stage bus can be supplied power by diesel generator power (stand-by power supply) simultaneously according to system setting, qs3 switch and Qs1 switch, qs2 switch should not supply power simultaneously, there is electric interlocking. In addition, the controller gathers the divide-shut brake state and the power state information of four switches through the adapter and carries out the automatic switch of switch, the adapter is as independent executor, realize the redundant electric interlocking framework of double ring networks on the spot through gathering the divide-shut brake state of four switches, realize strong and weak electricity separation, the stability of electric interlocking has been improved, in addition the adapter allies oneself with the third party power outward, establish the redundant distribution framework of double ring networks through gathering the third party uninterrupted power source, the power supply reliability of the electric power of guaranteeing, still can guarantee self electric interlocking conversion validity under the adapter is in the on-the-spot state under the condition of leaving the controller.

According to the above embodiment, preferably, the Qtie adapter is connected to a third-party power supply through the P1 and P2 ports, and the Qtie adapter forms a power supply circuit for the dual-loop ring network electric operation power supply with the Qs1 adapter, the Qs2 adapter, and the Qs3 adapter through the E port. The input ports of the operational control power supply of the Qtie adapter wiring terminals P1 and P2 serving as a three-inlet-wire one-bus power management system are required to be all connected with a third-party uninterruptible power supply, the power supply serves as a four-switch electric operation power supply and a control power supply of the control system to supply power to the controller, when the controller fails to be led out, the electric interlock can still work independently, local electric conversion of the switch can be executed, and the operational reliability is improved.

According to the above embodiment, preferably, as shown in fig. 2, the Qs1 adapter collects power parameters of the No. 1 transformer of the commercial power through the L1, L2 and L3 interfaces, and provides sampled power parameters to the controller through the a interface. The Qs1 adapter is connected with a switching-on and switching-off coil, an energy storage coil and an OF state contact OF the QF1 switch through a port B, and provides a controller wire for the controller through a port C to form a control loop to receive control OF the controller. The Qs1 adapter realizes the electric interlocking with the double-loop ring network among the Qs2, the Qtie and the Qs3 through the D port, and the Qs1 adapter realizes the electric power supply with the electric operation power supply of the double-loop ring network among the Qs2, the Qtie and the Qs3 through the E port. The Qs1 adapter is connected with an external button through an I port to realize local switching-on control, and the Qs1 adapter is connected with the external button through an O port to realize local switching-off control.

The Qs2 adapter collects the power parameters of the No. 2 mains supply transformer through the L1 interface, the L2 interface and the L3 interface, and provides sampling power supply parameters for the controller through the A interface. The Qs2 adapter is connected with the opening and closing coil, the energy storage coil and the OF state contact OF the Qs2 switch through a port B, and a controller wire is provided to the controller through a port C to form a control loop to be controlled by the controller. The Qs2 adapter realizes the electric interlocking with the double-loop ring network among the Qs1, the Qtie and the Qs3 through the D port, and the Qs2 adapter realizes the electric power supply with the electric operation power supply of the double-loop ring network among the Qs1, the Qtie and the Qs3 through the E port. The Qs2 adapter is connected with an external button through an I port to achieve on-site switching-on control, and the Qs2 adapter is connected with the external button through an O port to achieve on-site switching-off control.

The Qtie adapter is connected to a third-party power supply through P1 and P2 ports, and provides a stable electric operation power supply for the system. The Qtie adapter is connected with a switching-on and switching-off coil, an energy storage coil and an OF state contact OF the Qtie switch through a port B, and provides a controller line to the controller through a port C to form a control loop to receive the control OF the controller. The Qtie adapter realizes the electric interlock with the double-loop ring network among the Qs1, the Qs2 and the Qs3 through an E port, and the Qtie adapter outputs a stable electric operation power supply through the E port and realizes the power supply with the double-loop ring network electric operation power supply among the Qs1, the Qs2 and the Qs 3. The Qtie adapter is connected with an external button through an I port to realize on-site switching-on control, and the Qtie adapter is connected with the external button through an O port to realize on-site switching-off control.

The Qs3 adapter collects power parameters of a diesel generator (standby power supply) through the L1 interface, the L2 interface and the L3 interface, and provides sampling power state information for the controller and receives control signals of the controller through the C interface. The Qs3 adapter is connected with a switching-on and switching-off coil, an energy storage coil and an OF state contact OF the Qs3 switch through a port B, the Qs3 adapter is electrically interlocked with the double-loop ring network among Qs1, qs2 and Qtie through a port D, and the Qs3 adapter is electrically operated by a power supply OF the double-loop ring network among Qs1, qs2 and Qtie through a port E. The Qs3 adapter is connected with an external button through an I port to realize local switching-on control, and the Qs3 adapter is connected with the external button through an O port to realize local switching-off control.

The controller realizes the acquisition of the switching state, the power supply information and the automatic switching-on and switching-off control signal of the Qs1 through the ports 1A and 1C; the controller realizes acquisition of the on-off state, power supply information and automatic opening and closing control signals of the Qs2 through the ports 2A and 2C; the controller realizes the acquisition of the on-off state of the Qtie and the automatic opening and closing control signal through a 3C port; the controller collects the on-off state of the Qs3, the power supply voltage state information of the diesel power generation source and the automatic switching-on and switching-off control signal through a port 4C; the controller realizes information interaction with a client monitoring system, diesel generator start-stop signal output, load unloading signal output and the like through K, S, T, S2-E and TIE-E interfaces.

According to the above embodiment, as shown in fig. 3, the dual-loop looped network electrical interlock circuit preferably includes a Qs1 closing circuit, a Qs2 closing circuit, a Qtie closing circuit and a Qs3 closing circuit which are arranged in parallel, the Qs1 closing circuit includes a 1KA contact, an OF contact OF a Qs3 switch, an OF contact OF a Qs2 switch and an OF contact OF a Qtie switch which are arranged in series in sequence, and a PF contact OF a Qs1 switch, the Qs2 closing circuit includes a 2KA contact, an OF contact OF a Qs3 switch, an OF contact OF a Qs1 switch and a contact OF a Qtie switch which are arranged in parallel in sequence, and a PF contact OF a Qs2 switch, the Qtie closing circuit includes a 3KA contact, a contact OF a Qs1 switch and a contact OF a Qs2 switch which are arranged in series in sequence, and a PF contact OF a Qs2 switch which are arranged in parallel, and the Qs3 closing circuit includes a 4KA contact, an OF contact OF a Qs1 switch, an OF a Qs2 switch and a PF contact OF a Qs2 switch which are arranged in series in sequence.

An electrical interlock is arranged between the two mains supply incoming line switches and the bus coupler switch, namely, only two mains supply incoming line switches are allowed to be switched on simultaneously in any state of Qs1, qs2 and Qtie; meanwhile, the system is additionally provided with electrical interlocking between the two mains supply incoming line switches and the generator power incoming line switch, namely when the Qs1 and the Qs2 are all switched off, the Qs3 is allowed to be switched on; when any one of the switches Qs1 and Qs2 is switched on, the switch Qs3 cannot be switched on; when the Qs3 is switched on, the Qs1 and the Qs2 cannot be switched on; when Qs3 is switched on, the bus coupler Qtie can be automatically switched in or not switched in according to the setting selection. As shown in fig. 3, qs1, qs2, qtie, qs3 electric operation power supplies are all from the ports of P1 and P2 of the bus coupler adapter, and dual-loop network redundancy configuration is realized through the external E port, so that the reliability of the electric operation power supply of the change-over switch is ensured, and the technical principle of the electric interlock control circuit is as follows:

and the controller completes the control of the closing loop of the Qs1 switch through the breaking of the 1KA contact. When a 1KA contact in the adapter is closed, an OF contact connected with a Qs3 switch in series is in a normally closed state, a Qs2 switch OF or a Qtie switch OF connected in series is not simultaneously disconnected, and a PF contact OF the Qs1 is normally closed, a closing coil XF OF the Qs1 can be electrified to complete closing action. The principle of the implementation of the Qs1 electrical interlock is as follows: when the OF contact OF Qs3 is disconnected, namely Qs3 is in a switching-on position, the electric loop ensures that Qs1 is not electrically switched on; when the OF contacts OF Qs2 and Qtie are simultaneously disconnected, namely Qs2 and Qtie are simultaneously positioned at the switching-on position, the electric circuit ensures that Qs1 cannot be electrically switched on; when the lines are drawn under any two conditions, the electrical interlocking of the Qs1 prohibits the Qs1 from completing closing.

And the controller completes the control of the switching-on loop of the Qs2 switch through the breaking of the 2KA contact. When the 2KA contact in the adapter is closed, the OF contact connected with the Qs3 switch in series is in a normally closed state, the OF switch OF connected with the Qs1 switch or the OF switch OF connected with the Qtie switch in series is not simultaneously disconnected, and the PF contact OF the Qs2 is normally closed, the power-on OF the closing coil XF OF the Qs2 can be realized to complete the closing action. The principle of the implementation of Qs2 electric interlocking is as follows: when the OF contact OF Qs3 is disconnected, namely Qs3 is in a switching-on position, the electric loop ensures that Qs2 is not electrically switched on; when the OF contacts OF Qs1 and Qtie are simultaneously disconnected, namely Qs1 and Qtie are simultaneously positioned at the switching-on position, the electric circuit ensures that Qs2 cannot be electrically switched on; when the lines are in any two conditions, the electrical interlocking of the Qs2 prohibits the Qs2 from completing closing.

And the controller completes the control of the closing circuit of the Qtie switch through the breaking of the 3KA contact. When the 3KA contact in the adapter is closed, the Qs1 switch OF or the Qs2 switch OF connected in series is not simultaneously disconnected, and the PF contact OF the Qtie is normally closed, the closing coil XF OF the Qtie can be electrified to complete the closing action. The principle of implementation of the Qtie electrical interlock is: when the OF contacts OF Qs1 and Qs2 are opened simultaneously, i.e. Qs1 and Qs2 are in the closing position simultaneously, the electric circuit ensures that Qtie should not be electrically closed.

And the controller completes the control of the closing circuit of the Qtie switch through the breaking of the 4KA contact. When the 4KA contact in the adapter is closed, the Qs1 switch OF connected in series is not disconnected, the Qs2 switch OF connected in series is not disconnected, and the PF contact OF the Qs3 is normally closed, the closing coil XF OF the Qs3 can be electrified to complete closing action. The principle of the implementation of the Qs3 electrical interlock is as follows: when any one OF the OF contacts OF Qs1 or Qs2 is opened, namely any one OF Qs1 and Qs2 is in a switching-on position, the electric circuit ensures that Qs3 should not be electrically switched on.

Based on the above embodiment, the utility model discloses the theory of operation as follows: when faults such as voltage loss, phase failure, undervoltage, overvoltage and the like of any one path of commercial power supply cannot guarantee normal power utilization of the load, the control system disconnects a fault power supply inlet switch, simultaneously sends a load unloading signal to unload partial three-stage load and automatically closes the bus-coupled circuit breaker, and the other path of normal commercial power supply supplies power to the first-stage bus and the second-stage bus simultaneously; when the failure commercial power supply is recovered to be normal, the bus-tie breaker can be automatically disconnected, and the power supply is converted into the normal two paths of commercial power supplies; when the two mains supply sources have faults of voltage loss, phase failure, undervoltage, overvoltage and the like at the same time and cannot ensure normal power utilization of a load, the control system can automatically send a generator starting signal, the two mains supply incoming line circuit breakers and the bus tie circuit breaker are separated at the same time and then send a three-level load of an oil generator load unloading signal unloading part, after the control system confirms that a feedback signal of the load unloading of the generator is received, the generator power supply (standby power supply) is automatically switched on under the condition that the generator power supply is normal, and a customer can select whether to switch on the bus tie circuit breaker or not according to system setting; when any one of the mains supplies is recovered to be normal, the controller system can automatically stop the power supply of the generator, and returns to the normal power supply after confirming that the generator power incoming line breaker and the bus tie breaker are separated simultaneously.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a three inlet wires one mother allies oneself with automatic change over switch electric interlock control circuit, includes one section generating line, two sections generating lines, respectively through two way commercial power transformer that Qs1 switch and Qs2 switch and one section generating line, two sections generating lines link to each other, through the stand-by power supply that Qs3 switch and one section generating line or two sections generating lines are linked together and with the mother that Qs1 switch, qs2 switch, qs3 switch link to each other allies the cabinet, its characterized in that, the mother allies oneself with the cabinet and includes controller, adapter and Qtie switch, form electric interlock through the adapter between Qs1 switch, qs2 switch, qs3 switch, the Qtie switch.

2. The electrical interlock control circuit of a three-wire one-bus-tie automatic transfer switch according to claim 1, wherein the adapter comprises a Qs1 adapter, a Qs2 adapter, a Qs3 adapter and a Qtie adapter respectively connected with the controller, and a double-loop looped network electrical interlock circuit is formed among the Qs1 adapter, the Qs2 adapter, the Qs3 adapter and the Qtie adapter.

3. The electrical interlock control circuit of a three-incoming-line one-bus-tie automatic transfer switch according to claim 2, characterized in that the Qtie adapter is connected with a third party power supply through a P1 port and a P2 port, and the Qtie adapter forms a double-loop looped network electrical operation power supply circuit with the Qs1 adapter, the Qs2 adapter and the Qs3 adapter through an E port.

4. The electrical interlock control circuit of a three-wire-one-bus-tie automatic transfer switch according to claim 2 or 3, wherein the Qs1 adapter is connected with the Qs1 switch through a port B, the Qs2 adapter is connected with the Qs2 switch through a port B, the Qs3 adapter is connected with the Qs3 switch through a port B, and the Qtie adapter is connected with the Qtie switch through a port B.

5. The electrical interlock control circuit of claim 3, wherein the dual-loop looped network electrical interlock circuit comprises a Qs1 closing loop, a Qs2 closing loop, a Qtie closing loop and a Qs3 closing loop, which are connected in parallel.

6. The electrical interlock control circuit OF claim 5, wherein the Qs1 closing circuit comprises a 1KA contact, an OF contact OF a Qs3 switch, an OF contact OF a Qs2 switch and an OF contact OF a Qtie switch which are connected in series in sequence, and an PF contact OF the Qs1 switch, the Qs2 closing circuit comprises a 2KA contact, an OF contact OF a Qs3 switch, an OF contact OF a Qs1 switch and an OF contact OF a Qtie switch which are connected in series in sequence, and a PF contact OF a Qs2 switch, the Qtie closing circuit comprises a 3KA contact, an OF contact OF a Qs1 switch and an OF contact OF a Qs2 switch which are connected in series in sequence, and a PF contact OF a Qtie switch, the Qs3 Qs closing circuit comprises a 4KA contact, an OF contact OF a Qs1 switch, an OF contact OF a Qs2 switch and a PF contact OF a Qs3 switch which are connected in series in sequence.

7. The electrical interlock control circuit of a three-wire one-bus-tie automatic transfer switch according to any one of claims 2, 3, 5 and 6, wherein the controller is connected with the port A and the port C of the Qs1 adapter through the port 1A and the port 1C, the controller is connected with the port A and the port C of the Qs2 adapter through the port 2A and the port 2C, the controller is connected with the port C of the Qtie adapter through the port 3C, and the controller is connected with the port C of the Qs3 adapter through the port 4C.