KR101658360B1 - The transforming panel supplying electric power to catenary tram and the controlling system of a CCTV - Google Patents

Abstract

A circuit switcher is installed on an input circuit by a substation, and only the one of two circuit switchers maintains an ON contact point. When the substation which supplies and receives electricity to and from a first transformer, a second transformer, and a third transformer is blacked out, the contact point of the circuit switcher is changed to the opposite contact point of the circuit switcher to receive electricity from the other substation. When errors occur in an adjacent ground transformer, the first transformer and the second transformer are operated in parallel by maintaining a transformer switcher in the ON contact point. Therefore, the power is supplied via a DC converter and a lead-in circuit breaker, and the third transformer supplies the output of a common load to a tram station via a low voltage panel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a tram power supply switchboard and a CCTV surveillance camera monitoring control system,

Trams for supplying power to low-rise trams in the crossover section, and underground transformers and switchboards installed in the grounds of buses.

Generally, the low-rise low-floor tram is a roadside tram that travels along a railway with a special trajectory. It has no smoke and is advantageous for improvement of the city aesthetics.

In such a low-voltage low-tension tram, the power is supplied to the vehicle through the cable in the crossover section, and the vehicle is driven using the power of the battery mounted in the vehicle during the crossover section.

At this time, depending on the characteristics of the route, the crossover section and the crosstalk section may be mixed, and the system should be stably operated in the crosstalk / crosstalk or crosstalk / crosstalk transition sections.

The conventional unguided low-elevation tram can mount the battery in the vehicle and can drive the vehicle using the energy stored in the battery even in the unguided section without a line.

In other words, the DC / DC converter is controlled so that the charging power of the battery is inputted to the inverter and converted into the AC power to propel the vehicle by driving the motor.

Claim 5 of the present invention relates to a switchboard for receiving a load in parallel, comprising: a transformer, a circuit switcher, a transformer switcher, a terminal block, a current transformer, a circuit breaker, The circuit-switching device is installed on the input circuit for each substation so that only one of the two circuit-switching devices holds the ON-contact; Terminal block is a terminal block that receives power line from low voltage section of transformer, fixes and branches it, and supplies power line to circuit breaker through current transformer; The current transformer measures the amount of current for each transformer by dividing the power line branched through the terminal block and transmits the current amount measured by the main control unit through the control line; The microprocessor main controller receives the current of the transformer receiving the power through the current transformer and maintains the OFF contact of the transformer when the use rate of the transformer is less than the manager input value input to the microprocessor. , The transformer switching unit is operated in parallel with the ON contact maintained, and when the receiving substation receives power from the other substation, the switching unit switches the contact of the circuit switching unit to the opposite contact, Parallel operation There is a load distribution automatic controller.

Seismic Design Plate and Seismic Design Plate Seismic Design Plate and Seismic Design Plate In a switchboard, a spring and a support plate are stacked inside a lower plate, a ball is placed on the plate, a top plate is covered, and air is sucked through an air inlet by a vacuum pump, The space between the plates is brought into a vacuum state, and then the electromagnetic valve is closed to fix the upper plate and the lower plate; When the earthquake is detected by the earthquake detection sensor, the control unit composed of the microprocessor opens the solenoid valve and air is sucked into the space between the upper plate and the lower plate, And the earthquake-resistant design plate is different from the earthquake-resistant plate according to whether the earthquake occurs or not by buffering vibration between the upper plate and the lower plate.

Korea Patent Registration No. 10-0993464 Switching Board Parallel Operation Load Distribution Automatic Controller Korea Patent Registration No. 10-1011388 Seismic Design Plate and Seismic Design Plate Switchboard

Even when some substations are out of power, the power supply is effectively switched to other substations, and DC power of more than 10,000 volts is supplied to the trams, and commercial power is supplied to the trams and buses. 110 to 380 volts It is installed underground in transformer and switchboard to supply direct current and alternating current. It is installed inside the waterproof concrete block in the form of finished product by reflecting the seismic design. .

It provides stable power to two faults and supplies power for various trams using three transformers.

Because it is installed in the ground, it is bad in external environment such as humidity, flood, etc., so remote monitoring control is applied.

A seismic isolation device is installed between a waterproof concrete block and a metal enclosure to produce an integrated product that reflects seismic design.

Stable two-wire faucet, effective parallel operation, dedicated tram voltage supply, power supply for general commercial power supply and battery fast charging, and waterproof concrete and metal housing integrated with seismic design. Provides various common services such as status monitoring and remote control, remote power ON / OFF for commercial power load, remote troubleshooting for simple fault, kiosk, broadcasting, tram and bus arrival guidance, security surveillance camera and Yi-Fi service.

Figure 1 is a simplified block diagram of the present invention.
Figure 2 is a schematic
Figure 3 is a simplified power supply schematic of the present invention

Underground transformer composed of automatic load distributing controller, circuit switcher, transformer switcher, first transformer, second transformer, third transformer, DC converter, low pressure panel, ground terminal block, drain pump, It is a tramp power supply switchgear which is integrated into a watertight concrete block and combined with an earthquake plate inside the waterproof concrete block.

Parallel operation Load sharing The circuit-switching unit controlled by the controller is installed on the input circuit for each substation so that the ON-contact is maintained only by one of the two circuit-switching units, and power is supplied to the first, second and third transformers, If the receiving substation is out of power, it receives power from another substation, and it is a circuit changeover device which switches the contact of the circuit changeover device to the opposite contact.

Parallel Operation The load transformer under the control of the load control automatic controller switches the transformer switcher to the ON contact when a failure occurs in the adjacent underground transformer and operates the first transformer and the second transformer in parallel to operate the DC transformer, It is a transformer switch that supplies power.

The third transformer supplies AC 110V to 380V commercial power output to the drain pump and monitoring tower via the low-pressure half.

The smart surveillance controller consists of internal surveillance camera, surveillance sensor and current transformer, and it can measure the current status, voltage, and current measured through photographed image data of the internal surveillance camera and through the circuit breaker, transformer switcher, DC converter, Temperature, humidity, leakage, and flood data measured by the data and monitoring sensors to the control center control server through the monitoring tower local server.

Parallel operation The load distribution automatic controller drives the drain pump when immersion data is detected through the monitoring sensor.

Parallel operation Load distribution Automatic controller, circuit change machine, transformer switcher, first transformer, second transformer, third transformer, DC converter, low pressure panel, ground terminal block, drain pump, smart monitoring controller are integrated into metal enclosure The ground through the ground terminal block and the bottom of the metal housing are joined to the top plate of the seismic plate and the bottom plate is combined with the waterproof concrete block surrounding the outside of the metal housing core.

Surveillance tower is composed of surveillance camera, emergency bell, tower surveillance controller, amplifier integrated speaker, warning light, floodlight, wireless router, heart defibrillator controlled by local server and remote server controlled by control center control server connected to network. It is integrated into the inside of the surveillance tower.

The control center control server is connected to the local server and receives a video image of a CCTV surveillance camera and a smart surveillance controller internal surveillance camera to a control center control server; and the control center control server controls a local server to control an amplifier- And the control center control server opens the two-way communication path through the emergency bell when the emergency bell operation is performed, and the control center control server controls the warning light and the floodlighting unit.

The tower monitoring controller is composed of a state monitoring module, an open / close monitor, and a power supply, and is installed inside the monitoring tower housing.

The control center control server transmits the door open event to the control center control server through the state monitoring module through the utility power supply / non-discharge power, the network connection / non-presence data, and the open / close monitor.

The power supply unit receives AC power through the surge protector and converts the AC power into DC to supply power to the monitoring tower, but controls power ON / OFF by the control of the control center control server.

The control center control server transmits the surveillance camera image and the door open event to the control center control server when the lock open detection event is generated through the two-way communication path between the control center control server and the control center control server through the monitor.

The wireless router receives an external ISP (Internet Service Provider) network and provides a wireless Internet service through a wireless router.

The local server transmits the battery charge status data to the control center control server through the wireless communication, such as daily self-defibrillator self-daily, weekly, monthly check and failure, and the battery charge status data.

Parallel operation The load distribution automatic controller receives power from other substations when the receiving substation is out of power. It switches the contact of the circuit changeover control and the contact breaker when the underground transformer fails. After switching off the contact point, it switches the transformer switching device inside the adjacent ground transformer to ON contact point. A parallel transformer, a parallel transformer, a transformer, a parallel transformer, a parallel transformer, a transformer, and a transformer. The transformer is connected in parallel with the transformer, Tram power supply switchboard CCTV surveillance camera surveillance control system.

Referring to FIG. 3, the core control method will be described in detail.

Parallel operation The load distribution automatic controller controls the switching of the contact of the circuit-breaker when the receiving substation receives power from the other substation in case of power failure.

In addition, when the ground transformer (second ground transformer) fails, the transformer switching device in the adjacent ground transformer (first ground transformer) is switched to the ON contact after the input contactor (second input breaker) (First section) through the first DC converter and the first draw-in interrupter by parallel operation of the first transformer and the second transformer inside the first transformer, (Notch-On) connected to the power supply unit, and power supply including the fault section (second section) is provided as the main feature of the present invention.

In one embodiment,

By adding a monitor, the kiosk (bus arrival guide terminal) function can be added to the lighting unit to further implement the lighting function.

In one embodiment,

The tram power supply switchgear is composed of an underground transformer consisting of a parallel operation load distribution controller, a circuit switcher, a transformer switcher, a first transformer, a second transformer, a third transformer, a DC converter, And the earthquake-resistant tram power supply switchgear and monitoring tower combined with the seismic proof plate inside the waterproof concrete block are installed in the local server receiving the remote control from the control center control server connected to the network and the CCTV surveillance camera controlled by the local server, CCTV surveillance monitoring the tram stop and trunk power supply switchboard with a monitoring tower that is integrated into the monitoring tower, such as emergency bell, IP phone, tower supervisory controller, amplifier integrated speaker, warning light, floodlight, wireless router, heart defibrillator Camera surveillance control system.

Parallel operation Load sharing The circuit-switching unit controlled by the controller is installed on the input circuit for each substation so that the ON-contact is maintained only by one of the two circuit-switching units, and power is supplied to the first, second and third transformers, If the receiving substation is out of power, it receives power from another substation, and it is a circuit changeover device which switches the contact of the circuit changeover device to the opposite contact.

Parallel Operation The load transformer under the control of the load control automatic controller switches the transformer switcher to the ON contact when a failure occurs in the adjacent underground transformer and operates the first transformer and the second transformer in parallel to operate the DC transformer, It is a transformer switch that supplies power.

The third transformer supplies the commercial power output to the surveillance tower via the low-voltage section.

The smart surveillance controller consists of internal surveillance camera, surveillance sensor and current transformer, and it can measure the current status, voltage, and current measured through photographed image data of the internal surveillance camera and through the circuit breaker, transformer switcher, DC converter, Temperature, humidity, leakage, and immersion data measured by data and surveillance sensors are transmitted to the surveillance tower.

Parallel operation Load distribution Automatic controller, circuit change machine, transformer switcher, first transformer, second transformer, third transformer, DC converter, low pressure panel, smart monitoring controller are built in the metal enclosure, Is coupled to an upper plate of an earthquake-proof plate, and the lower plate is joined with a waterproof concrete block surrounding the outside of the center of the metal housing.

The control center control server is connected to the local server and receives a video image of a CCTV surveillance camera and a smart surveillance controller internal surveillance camera to a control center control server; and the control center control server controls a local server to control an amplifier- And the control center control server opens the two-way communication path through the IP telephone when the emergency bell operation is performed, and the control center control server controls the warning light and the light emitter.

The tower monitoring controller includes a control server, a status monitoring module, an open / close monitor, a lock device, and a power supply unit, and is installed inside the monitoring tower housing.

The control center control server transmits the door open event to the control center control server through the state monitoring module, via the commercial power source / non-contact power source, the network connection type presence / absence data, and the open / close monitor.

The power supply unit receives AC power through the surge protector and converts the AC power into DC to supply power to the monitoring tower, but controls power ON / OFF by the control of the control center control server.

The control center control server transmits the surveillance camera image and the door open event to the control center control server when the lock open detection event is generated through the two-way communication path between the control center control server and the control center control server through the monitor.

The wireless router receives an external ISP (Internet Service Provider) network and provides a wireless Internet service through a wireless router.

The local server transmits its own daily, weekly, monthly failure check and failure data, and battery charge status data of the cardiac defibrillator to the control center control server through short-range wireless communication.

Parallel operation The load distribution automatic controller receives power from other substations when the receiving substation is out of power. It switches the contact of the circuit changeover control and the contact breaker when the underground transformer fails. After switching off the contact point, it switches the transformer switching device inside the adjacent ground transformer to ON contact point. Parallel tran- sistor power supply switchboard that features parallel operation and load sharing automatic controller that connects faulty section by connecting parallel connection and adjacent junctions and connecting power supply including failure section through DC converter and input breaker CCTV surveillance camera surveillance Control system.

In one embodiment,

The tram power supply switchgear is composed of an underground transformer consisting of a parallel operation load distribution controller, a circuit switcher, a transformer switcher, a first transformer, a second transformer, a third transformer, a DC converter, Tram power distribution switchgear built in one piece; Parallel operation Load sharing The circuit-switching unit controlled by the controller is installed on the input circuit for each substation so that the ON-contact is maintained only by one of the two circuit-switching units, and power is supplied to the first, second and third transformers, A circuit-switched device that converts the contact of the circuit-transferring device to the opposite contact, receiving power from another substation when the receiving substation is out of power; Parallel Operation The load transformer under the control of the load control automatic controller switches the transformer switcher to the ON contact when a failure occurs in the adjacent underground transformer and operates the first transformer and the second transformer in parallel to operate the DC transformer, A transformer switch for powering; The third transformer supplies the utility power output to the tram stop via the low-pressure half; The smart surveillance controller consists of internal surveillance camera, surveillance sensor and current transformer, and it can measure the current status, voltage, and current measured through photographed image data of the internal surveillance camera and through the circuit breaker, transformer switcher, DC converter, Temperature, humidity, leak, and flood data measured by data and surveillance sensors to the control center control server; Parallel operation The load distribution automatic controller receives power from other substations when the receiving substation is out of power. It switches the contact of the circuit changeover control and the contact breaker when the underground transformer fails. After switching off the contact point, it switches the transformer switching device inside the adjacent ground transformer to ON contact point. Parallel tran- sistor power supply switchboard that features parallel operation and load sharing automatic controller that connects faulty section by connecting parallel connection and adjacent junctions and connecting power supply including failure section through DC converter and input breaker CCTV surveillance camera surveillance Control system.

In one embodiment,

The seismic isolation plate is constructed by stacking a spring and a base plate on the bottom plate, placing the ball on the bottom plate, covering the top plate, compressing the air through the air intake port by a compression pump, and compressing the space between the upper plate and the lower plate When the earthquake is detected through the earthquake detection sensor, the control valve opens the solenoid valve and air is released to the space between the upper plate and the lower plate, And the upper plate and the lower plate are vibratable with respect to the upper plate and the lower plate by means of balls.

In one embodiment,

A tramway power distribution switchboard comprising a metal enclosure and a built-in metal enclosure and installed inside the underground waterproofing concrete, characterized in that the metal enclosure is a closed enclosure for filling nitrogen gas therein to prevent moisture generation. CCTV surveillance camera surveillance control system.

1: Insulation section (Notch-On)

Claims (7)

delete The tram power supply switchgear consists of a parallel load distribution automatic controller, a circuit switcher, a transformer switcher, a first transformer, a second transformer, a third transformer, a DC converter, a low voltage switch, a ground terminal, A trunk tram power distribution switchgear integrated into a metal enclosure and coupled with an earthquake plate inside a waterproof concrete block;
The monitoring tower is composed of a local server receiving remote control from the control center control server connected to the network, a CCTV surveillance camera controlled by the local server, an emergency bell including an IP telephone, a tower supervisory controller, an amplifier integrated speaker, CCTV surveillance camera surveillance and control system that monitors the tram station and the tram power supply switchboard with the integrated router, router, heart defibrillator,
Parallel operation Load sharing The circuit-switching unit controlled by the controller is installed on the input circuit for each substation so that the ON-contact is maintained only by one of the two circuit-switching units, and power is supplied to the first, second and third transformers, A circuit-switched device that converts the contact of the circuit-transferring device to the opposite contact, receiving power from another substation when the receiving substation is out of power;
Parallel Operation The load transformer under the control of the load control automatic controller switches the transformer switcher to the ON contact when a failure occurs in the adjacent underground transformer and operates the first transformer and the second transformer in parallel to operate the DC transformer, A transformer switch for powering;
The third transformer supplies the commercial power output to the monitoring tower via the low-pressure half;
The smart surveillance controller consists of internal surveillance camera, surveillance sensor and current transformer, and it can measure the current status, voltage, and current measured through photographed image data of the internal surveillance camera and through the circuit breaker, transformer switcher, DC converter, Temperature, humidity, leakage, and flooding data measured by data and surveillance sensors to the control center control server through the monitoring tower local server;
Parallel operation Load distribution Automatic controller, circuit change machine, transformer switcher, first transformer, second transformer, third transformer, DC converter, low pressure panel, ground terminal block, smart monitoring controller are built in the metal enclosure, And the bottom of the metal housing is coupled to the top plate of the earthquake proof plate and the bottom plate is coupled with the waterproof concrete block surrounding the outside of the metal housing core;
The control center control server is connected to the local server and receives a video image of a CCTV surveillance camera and a smart surveillance controller internal surveillance camera to a control center control server; and the control center control server controls a local server to control an amplifier- And the control center control server opens the two-way communication path through the IP telephone when the emergency bell operation is performed, and the control center control server controls the warning light and the light emitter;
The tower monitoring controller is comprised of a state monitoring module, an open / close monitor, and a power supply unit and is installed inside the monitoring tower housing;
The control center control server transmits the door open event to the control center control server through the utility power supply / non-power supply network network connection / non-status data through the status monitoring module and the open / close monitor;
The power supply unit receives AC power through a surge protector and converts the AC power into DC to supply power to the monitoring tower, and controls power ON / OFF by the control of the control center control server;
The control center control server transmits a surveillance camera image and an enclosure door open event to a control center control server when a lock open detection event is generated through a two-way communication path between the control center control server and the control center control server through a monitor;
The wireless router receives an external ISP (Internet Service Provider) network to provide a wireless Internet service through a wireless router;
The local server transmits its own daily, weekly, monthly malfunction check and malfunction and battery charge status data of the cardiac defibrillator to the control center control server through short-range wireless communication;
Parallel operation The load distribution automatic controller receives power from other substations when the receiving substation is out of power. It switches the contact of the circuit changeover control and the contact breaker when the underground transformer fails. After switching off the contact point, it switches the transformer switching device inside the adjacent ground transformer to ON contact point. A parallel transformer, a parallel transformer, a transformer, a parallel transformer, a parallel transformer, a transformer, and a transformer. The transformer is connected in parallel with the transformer, Tram power supply switchgear CCTV surveillance camera surveillance control system.
The tram power supply switchgear is composed of an underground transformer consisting of a parallel operation load distribution controller, a circuit switcher, a transformer switcher, a first transformer, a second transformer, a third transformer, a DC converter, A tramway power distribution switchgear integrated into a watertight concrete block and joined with an earthquake plate;
The monitoring tower is composed of a local server receiving remote control from the control center control server connected to the network, a CCTV surveillance camera controlled by the local server, an emergency bell including an IP telephone, a tower supervisory controller, an amplifier integrated speaker, CCTV surveillance camera surveillance and control system that monitors the tram station and the tram power supply switchboard with the integrated router, router, heart defibrillator,
Parallel operation Load sharing The circuit-switching unit controlled by the controller is installed on the input circuit for each substation so that the ON-contact is maintained only by one of the two circuit-switching units, and power is supplied to the first, second and third transformers, A circuit-switched device that converts the contact of the circuit-transferring device to the opposite contact, receiving power from another substation when the receiving substation is out of power;
Parallel Operation The load transformer under the control of the load control automatic controller switches the transformer switcher to the ON contact when a failure occurs in the adjacent underground transformer and operates the first transformer and the second transformer in parallel to operate the DC transformer, A transformer switch for powering;
The third transformer supplies the commercial power output to the monitoring tower via the low-pressure half;
The smart surveillance controller consists of internal surveillance camera, surveillance sensor and current transformer, and it can measure the current status, voltage, and current measured through photographed image data of the internal surveillance camera and through the circuit breaker, transformer switcher, DC converter, Temperature, humidity, leakage, and flooding data measured by data and surveillance sensors to the control center control server through the monitoring tower local server;
The control center control server is connected to the local server and receives a video image of a CCTV surveillance camera and a smart surveillance controller internal surveillance camera to a control center control server; and the control center control server controls a local server to control an amplifier- And the control center control server opens the two-way communication path through the IP telephone when the emergency bell operation is performed, and the control center control server controls the warning light and the light emitter;
The tower monitoring controller is comprised of a state monitoring module, an open / close monitor, and a power supply unit and is installed inside the monitoring tower housing;
The control center control server transmits the door open event to the control center control server through the utility power supply / non-power supply network network connection / non-status data through the status monitoring module and the open / close monitor;
The power supply unit receives AC power through a surge protector and converts the AC power into DC to supply power to the monitoring tower, and controls power ON / OFF by the control of the control center control server;
The control center control server transmits a surveillance camera image and an enclosure door open event to a control center control server when a lock open detection event is generated through a two-way communication path between the control center control server and the control center control server through a monitor;
The wireless router receives an external ISP (Internet Service Provider) network to provide a wireless Internet service through a wireless router;
The local server transmits its own daily, weekly, monthly malfunction check and malfunction and battery charge status data of the cardiac defibrillator to the control center control server through short-range wireless communication;
Parallel operation The load distribution automatic controller receives power from other substations when the receiving substation is out of power. It switches the contact of the circuit changeover control and the contact breaker when the underground transformer fails. After switching off the contact point, it switches the transformer switching device inside the adjacent ground transformer to ON contact point. Parallel tran- sistor power supply switchboard that features parallel operation and load sharing automatic controller that connects faulty section by connecting parallel connection and adjacent junctions and connecting power supply including failure section through DC converter and input breaker CCTV surveillance camera surveillance Control system.
The tram power supply switchgear is composed of an underground transformer consisting of a parallel operation load distribution controller, a circuit switcher, a transformer switcher, a first transformer, a second transformer, a third transformer, a DC converter, A trunk tram power distribution switchboard fabricated in one piece; and
Surveillance tower is a monitoring server that monitors CCTV surveillance camera, emergency bell, tower surveillance controller, amplifier integrated speaker, warning light, floodlight, heart defibrillator controlled by local server and remote server controlled by remote control from control center control server connected to network. It is a CCTV surveillance camera surveillance control system that monitors the tram station and the tram power supply switchboard with a built-in monitoring tower inside.
Parallel operation Load sharing The circuit-switching unit controlled by the controller is installed on the input circuit for each substation so that the ON-contact is maintained only by one of the two circuit-switching units, and power is supplied to the first, second and third transformers, A circuit-switched device that converts the contact of the circuit-transferring device to the opposite contact, receiving power from another substation when the receiving substation is out of power;
Parallel Operation The load transformer under the control of the load control automatic controller switches the transformer switcher to the ON contact when a failure occurs in the adjacent underground transformer and operates the first transformer and the second transformer in parallel to operate the DC transformer, A transformer switch for powering;
The third transformer supplies the commercial power output to the monitoring tower via the low-pressure half;
The smart surveillance controller consists of internal surveillance camera, surveillance sensor and current transformer, and it can measure the current status, voltage, and current measured through photographed image data of the internal surveillance camera and through the circuit breaker, transformer switcher, DC converter, Temperature, humidity, leakage, and flooding data measured by data and surveillance sensors to the control center control server through the monitoring tower local server;
The control center control server is connected to the local server and receives a video image of a CCTV surveillance camera and a smart surveillance controller internal surveillance camera to a control center control server; and the control center control server controls a local server to control an amplifier- And the control center control server activates a bidirectional communication line when the emergency bell is activated, and the control center control server controls the warning light and the light emitter;
The tower monitoring controller is comprised of a state monitoring module, an open / close monitor, and a power supply unit and is installed inside the monitoring tower housing;
The control center control server transmits the door open event to the control center control server through the utility power supply / non-power supply network network connection / non-status data through the status monitoring module and the open / close monitor;
The power supply unit receives AC power through a surge protector and converts the AC power into DC to supply power to the monitoring tower, and controls power ON / OFF by the control of the control center control server;
The control center control server transmits a surveillance camera image and an enclosure door open event to a control center control server when a lock open detection event is generated through a two-way communication path between the control center control server and the control center control server through a monitor;
The local server transmits its own daily, weekly, monthly malfunction check and malfunction and battery charge status data of the cardiac defibrillator to the control center control server through short-range wireless communication;
Parallel operation The load distribution automatic controller receives power from other substations when the receiving substation is out of power. It switches the contact of the circuit changeover control and the contact breaker when the underground transformer fails. After switching off the contact point, it switches the transformer switching device inside the adjacent ground transformer to ON contact point. Parallel tran- sistor power supply switchboard that features parallel operation and load sharing automatic controller that connects faulty section by connecting parallel connection and adjacent junctions and connecting power supply including failure section through DC converter and input breaker CCTV surveillance camera surveillance Control system.
The method according to any one of claims 2, 3, and 4,
The seismic isolation plate is constructed by stacking a spring and a base plate on the bottom plate, placing the ball on the bottom plate, covering the top plate, compressing the air through the air intake port by a compression pump, and compressing the space between the upper plate and the lower plate When the earthquake is detected through the earthquake detection sensor, the control valve opens the solenoid valve and air is released to the space between the upper plate and the lower plate, Wherein the upper and lower vibrations are buffered by the spring and the left and right vibrations between the upper plate and the lower plate by a ball.
The method according to any one of claims 2, 3, and 4,
CCTV surveillance camera surveillance and control system with additional trolley power supply switchboard with additional kiosk and bus arrival information terminal function by adding monitor to monitoring tower.
The method according to any one of claims 2, 3, and 4,
A trunk tram power distribution switchboard fabricated integrally in a metal enclosure,
Wherein the metal enclosure is a sealed enclosure and filled with nitrogen gas therein.

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