CN116865427A - Safe operation method for automatic time-delay closing - Google Patents

Safe operation method for automatic time-delay closing Download PDF

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Publication number
CN116865427A
CN116865427A CN202310202969.6A CN202310202969A CN116865427A CN 116865427 A CN116865427 A CN 116865427A CN 202310202969 A CN202310202969 A CN 202310202969A CN 116865427 A CN116865427 A CN 116865427A
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CN
China
Prior art keywords
time
switch
relay
equipment
switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310202969.6A
Other languages
Chinese (zh)
Inventor
孙旭东
王玉明
官枫
焦旭
李�杰
马蕾娜
潘麟
牟宝亮
姜伟伟
王锦维
宗玉芹
张慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pingdu Power Supply Company Shandong Electric Power Company Sgcc
Original Assignee
Pingdu Power Supply Company Shandong Electric Power Company Sgcc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pingdu Power Supply Company Shandong Electric Power Company Sgcc filed Critical Pingdu Power Supply Company Shandong Electric Power Company Sgcc
Priority to CN202310202969.6A priority Critical patent/CN116865427A/en
Publication of CN116865427A publication Critical patent/CN116865427A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention relates to a safe operation method for automatic time-delay closing, which comprises the following steps: step A, initializing: setting a threshold value and displaying the running state of the power utilization side equipment; and step B, running: manual/automatic switching, current comparison; step C, overload operation: the current of the power utilization side equipment is larger than or equal to a current threshold value; step D, warning, timing and resetting: sending an alarm signal and stopping alarming; step E, tripping/delay closing of the equipment switch: tripping the power utilization side equipment switch, and closing the power utilization side equipment switch; step F, tripping and stopping a bus switch/starting a motor in a closing way: the electric side equipment switch trips, the electric side bus switch trips and stops, and the motor starts to switch on by the electric side bus switch; step G, equipment opening Guan Fu is closed: the electric side equipment is used for opening Guan Fu and closing. According to the safe operation method of automatic time-delay closing, current data of electric equipment, and time and type of faults are recorded in real time; and after tripping, the automatic closing operation is realized.

Description

Safe operation method for automatic time-delay closing
Technical Field
The invention relates to the technical field of electrical control, in particular to a safe operation method for automatic time-delay closing.
Background
In the power system, when the power system fails to work according to the index, a fault occurs. That is, devices in the power grid, such as power generation devices (generators), power transformation devices (transformers), power transmission devices (transmission lines, power towers), etc., do not meet the expected "send-change-send" requirements. From the point of view of the occurrence of power system faults, common faults are: generator set faults, transmission line faults, substation faults, bus faults and the like. From the appearance of the power-side fault, the power fault is further divided into: an increase in current, i.e. in the electrical device connecting the short-circuit point with the power supply; voltage drop, namely, voltage on electrical equipment around a fault point is reduced, and the closer the electrical distance from the fault point is, the more serious the voltage drop is, even the voltage drop is zero; the phase difference between the line start voltage and the current will change; the ratio between the line start voltage and the current, i.e. the measured impedance, will change.
At present, when a fault signal occurs, a protection mechanism of the electric equipment trips and is powered off, so that the electric equipment is protected, and meanwhile, other electric equipment in a power system is prevented from being influenced. However, the following drawbacks still exist in the application of the electric equipment adopting the protection mechanism in the electric power system:
1. the electric equipment can not obtain the fault reason and the grade of the fault due to fault tripping of the electric equipment;
2. after the electric equipment trips due to faults, switching-on power transmission operation is carried out on site manually even if the electric equipment has small faults;
3. the power system cannot acquire and record records, fault types and time data.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a safe operation method for automatic time-delay closing, which is used for recording current data of electric equipment, and time and type of faults in real time; and after tripping, the automatic closing operation is realized.
The invention adopts the technical scheme that:
the safe operation method of the automatic time-delay closing comprises the following steps:
A. initializing:
and initializing a system, setting a threshold value, and displaying the running state of the power utilization side equipment.
B. And (3) running:
manual/automatic switching;
starting the switching-on of the power-consumption-side bus switch, and simultaneously starting to record the switching-on time of the power-consumption-side bus switch;
the power utilization side equipment switch is switched on, and simultaneously, the time for switching on the power utilization side equipment switch is recorded;
and (3) monitoring the current of the power utilization side equipment in real time and comparing the current with a set threshold value.
C. Overload operation:
current greater than equal to that of electricity-using side equipmentAt a set current threshold I max And when the power utilization side equipment is in overload operation.
D. Warning, timing and resetting:
sending an alarm signal, and simultaneously starting to record the alarm time and overload overtime time;
until reaching the set warning time T Warning The alarm is then stopped or manually cancelled during the alarm.
E. Device switch tripping/delay closing:
until the overload time-out time is greater than the set overload time-out time T Timeout of time Then, tripping the switch of the equipment at the electric side, and simultaneously starting to record the time of delayed closing;
until reaching the set time delay closing time T Closing switch The rear power side device switch is closed or the power side device switch is manually closed during tripping of the device switch.
F. Bus switch trip stop/motor closing start:
the time of switching on the equipment switch at the electricity utilization side is smaller than the set switching-on operation interval time T Spacing of When the power consumption side equipment is overloaded;
tripping of the equipment switch at the electricity utilization side;
the tripping of the power-consumption-side bus switch is stopped, and meanwhile, the time for closing the power-consumption-side bus switch is stopped and the time for delay starting of the motor is started to be recorded;
until reaching the set motor delay starting time T Motor with a motor housing And then, the motor is started to be switched on by an electric side bus switch.
G. Device switch Guan Fu switch-on:
the electric side equipment is used for opening Guan Fu and closing.
Further, the current of real-time supervision power consumption side equipment is realized by collection mechanism, includes:
the current transformer is arranged on a power cable of the power utilization side equipment, a transmitter is arranged on a secondary loop of the current transformer in series, and a transmitting output end of the transmitter is electrically connected with a programmable logic controller.
Further, setting a threshold value, displaying an operation state of the electric side device, and realizing the operation by the operating mechanism, the method includes:
and the touch display screen is in communication connection with the programmable logic controller.
Further, the programmable logic controller is provided with a relay set in an electrical connection manner, and the relay set comprises:
alarm relay KA1, stop relay KA2, closing relay KA3, overload relay KA4, start/stop action relay KA5, alarm relay KA1, stop relay KA2, closing relay KA3, overload relay KA4, start/stop action relay KA 5's coil is connected to programmable logic controller's DO port department respectively electrically.
Further, in the step a, in the initializing, a threshold is set through a display screen, where the threshold includes:
overload current I max Calibrating by parameters of the power utilization side equipment;
warning time T Warning The starting time of the audible and visual alarm;
overload timeout time T Timeout of time Judging the tripping condition of a switch of the equipment at the electricity utilization side;
time delay closing time T Closing switch Judging the condition of reclosing after the switch of the equipment on the electricity side trips;
switching-on operation interval time T Spacing of Judging the tripping condition of the bus bar at the electricity utilization side;
delay start time T of motor Motor with a motor housing And judging the condition of switching on after the electricity-using side bus is tripped and switching on and switching off again by the electricity-using side equipment switch.
Further, in the step B, in operation:
manual/automatic switching, switching through a display screen;
the power side bus switch is switched on and started, and is controlled through a normally open contact of the starting/stopping relay KA 5;
switching on by using an electric side equipment switch, and controlling by using a normally open contact of a switching-on relay KA 3;
and C, in overload operation:
and comparing the current of the power utilization side equipment monitored in real time with a set threshold value, and processing the current through a CPU of the programmable logic controller.
Further, in the guarantee D, alert, timing, reset:
and triggering of the audible and visual alarm is controlled through a normally open contact of the alarm relay KA 1.
Further, in the step E, in the tripping/delay closing of the device switch:
tripping the equipment switch at the electricity utilization side, and controlling the equipment switch by stopping the normally closed contact of the relay KA 2;
and the electric side equipment switch is used for switching on, and the normally open contact of the switching-on relay KA3 is used for controlling.
Further, in the step F, in the step of tripping and stopping the bus switch and starting the motor switch-on:
the tripping of the power-side bus switch is stopped, and the normally closed contact of the starting/stopping relay KA5 is used for controlling;
the power side bus switch is switched on and started, and is controlled through a normally open contact of the starting/stopping relay KA 5;
the normally closed contact of the start/stop relay KA5 and the normally open contact of the start/stop relay KA5 are interlocking circuits.
Further, in the step G, the device opening Guan Fu is closed:
and the electric side equipment switch is used for switching on, and the normally open contact of the switching-on relay KA3 is used for controlling.
The safe operation method for automatic time-delay closing has the advantages that:
1. collecting the current of electric equipment through a current transformer and a transmitter;
2. setting a threshold value and displaying data of the power utilization side equipment through a display screen;
3. processing a current signal and an overload signal of the electric equipment through the controller;
4. and sending an alarm signal to each alarm part in the alarm through the controller, and recording corresponding event time.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, and the drawings in the following description are embodiments of the present invention.
FIG. 1 is a schematic electrical flow diagram of a method of providing automatic time-lapse closing safe operation in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a logic flow I of a method for providing a safe operation of automatic time-lapse closing in accordance with an embodiment of the present invention;
FIG. 3 is a second logic flow diagram of a method for providing automatic time-lapse closing safe operation according to an embodiment of the present invention;
fig. 4 is an electrical schematic diagram of a safe operation method for automatic time-delay closing according to an embodiment of the present invention.
In the figure:
12. the system comprises a programmable logic controller 13, a transmitter 14, a current transformer 16, a display screen 19 and a relay set.
Detailed Description
In order to more clearly and clearly describe the specific implementation objects and embodiments of the present invention, the following description will fully describe the technical solutions of the present invention, and the described embodiments are some, but not all, embodiments of the present invention. All other embodiments based on the described embodiments of the invention fall within the scope of the invention without making inventive efforts.
The invention relates to a safe operation method for automatic time-delay closing, as shown in figures 1, 2 and 3, comprising the following steps:
A. initializing:
and initializing a system, setting a threshold value, and displaying the running state of the power utilization side equipment.
The threshold value is set by the display screen 16, including:
overload current I max Calibrating by parameters of the power utilization side equipment;
warning time T Warning The starting time of the audible and visual alarm;
overload timeoutTime T Timeout of time Judging the tripping condition of a switch of the equipment at the electricity utilization side;
time delay closing time T Closing switch Judging the condition of reclosing after the switch of the equipment on the electricity side trips;
switching-on operation interval time T Spacing of Judging the tripping condition of the bus bar at the electricity utilization side;
delay start time T of motor Motor with a motor housing And judging the condition of switching on after the electricity-using side bus is tripped and switching on and switching off again by the electricity-using side equipment switch.
B. And (3) running:
manual/automatic switching, switching by the display screen 16;
the switching-on start of the power-consumption-side bus switch is controlled through a normally open contact of the starting/stopping relay KA5, and meanwhile, the switching-on time of the power-consumption-side bus switch is recorded;
the power utilization side equipment switch is switched on, the normally open contact of the switching-on relay KA3 is used for controlling, and meanwhile, the time for switching on the power utilization side equipment switch is recorded;
and (3) monitoring the current of the power utilization side equipment in real time and comparing the current with a set threshold value.
C. Overload operation:
comparing the current of the power utilization side equipment monitored in real time with a set threshold value, and processing the current by a CPU of the programmable logic controller 12;
the current of the electricity-using side equipment is more than or equal to a set current threshold I max And when the power utilization side equipment is in overload operation.
D. Warning, timing and resetting:
an alarm signal is sent, the normally open contact of the alarm relay KA1 is used for controlling, an audible and visual alarm is triggered, and meanwhile, the alarm time and overload overtime time are recorded;
until reaching the set warning time T Warning The alarm is then stopped or manually cancelled during the alarm.
E. Device switch tripping/delay closing:
the time until overload time-out is greater than the set overloadTimeout time T Timeout of time Then, the switch of the equipment at the electricity utilization side trips, the normally closed contact of the relay KA2 is stopped to control, and meanwhile, the time of delay closing is recorded;
until reaching the set time delay closing time T Closing switch The latter electric side equipment switch is switched on, controlled by the normally open contact of the switching-on relay KA3, or manually switched on during tripping of the equipment switch.
F. Bus switch trip stop/motor closing start:
the time of switching on the equipment switch at the electricity utilization side is smaller than the set switching-on operation interval time T Spacing of When the power consumption side equipment is overloaded;
tripping of the equipment switch at the electricity utilization side;
the tripping of the power-consumption-side bus switch is stopped, the normally closed contact of the starting/stopping relay KA5 is used for controlling, and meanwhile, the time for closing the power-consumption-side bus switch and the time for starting the delay starting of the motor are stopped to be recorded;
until reaching the set motor delay starting time T Motor with a motor housing After that, the motor is started by switching on an electric side bus switch, and is controlled by a normally open contact of a starting/stopping relay KA 5;
the normally closed contact of the start/stop relay KA5 and the normally open contact of the start/stop relay KA5 are interlocking circuits.
G. Device switch Guan Fu switch-on:
the electric side equipment is opened Guan Fu for switching on and is controlled by a normally open contact of the switching-on relay KA 3.
According to the safe operation method of the automatic time-delay closing in the embodiment, the specific components realized by the safe operation method are further described below:
the current of real-time supervision electricity side equipment is realized by collection system, as shown in fig. 4, includes:
the current transformer 14 is arranged on a power cable of the power-consumption side equipment, the transmitter 13 is arranged on a secondary loop of the current transformer 14 in series, and a transmitting output end of the transmitter 13 is electrically connected with the programmable logic controller 12.
Setting a threshold value, displaying the running state of the electricity-using side equipment, and realizing the running state by an operating mechanism, wherein the running state comprises the following steps:
a touch-sensitive display screen 16, the display screen 16 being in communication with the programmable logic controller 12.
The programmable logic controller 12 is electrically connected to a relay set 19, and the relay set 19 includes:
alarm relay KA1, stop relay KA2, closing relay KA3, overload relay KA4, start/stop action relay KA5, the coils of alarm relay KA1, stop relay KA2, closing relay KA3, overload relay KA4, start/stop action relay KA5 are respectively electrically connected to DO port of programmable logic controller 12.
With the above description, the embodiments of the automatic time-delay closing safe operation method according to the present invention are taught, and related staff can completely make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims (10)

1. The safe operation method of automatic time-delay closing is characterized in that:
comprising the following steps:
A. initializing:
initializing a system, setting a threshold value, and displaying the running state of the power utilization side equipment;
B. and (3) running:
manual/automatic switching;
starting the switching-on of the power-consumption-side bus switch, and simultaneously starting to record the switching-on time of the power-consumption-side bus switch;
the power utilization side equipment switch is switched on, and simultaneously, the time for switching on the power utilization side equipment switch is recorded;
the current of the power-consumption side equipment is monitored in real time and is compared with a set threshold value;
C. overload operation:
electricity utilization sideThe current of the equipment is greater than or equal to the set current threshold I max When the power utilization side equipment is in overload operation;
D. warning, timing and resetting:
sending an alarm signal, and simultaneously starting to record the alarm time and overload overtime time;
until reaching the set warning time T Warning Stopping the alarm after the alarm, or manually cancelling the alarm during the alarm;
E. device switch tripping/delay closing:
until the overload time-out time is greater than the set overload time-out time T Timeout of time Then, tripping the switch of the equipment at the electric side, and simultaneously starting to record the time of delayed closing;
until reaching the set time delay closing time T Closing switch The rear electric side equipment switch is closed, or the electric side equipment switch is manually closed during the tripping period of the equipment switch;
F. bus switch trip stop/motor closing start:
the time of switching on the equipment switch at the electricity utilization side is smaller than the set switching-on operation interval time T Spacing of When the power consumption side equipment is overloaded;
tripping of the equipment switch at the electricity utilization side;
the tripping of the power-consumption-side bus switch is stopped, and meanwhile, the time for closing the power-consumption-side bus switch is stopped and the time for delay starting of the motor is started to be recorded;
until reaching the set motor delay starting time T Motor with a motor housing Then, the motor is started and is switched on by an electric side bus switch;
G. device switch Guan Fu switch-on:
the electric side equipment is used for opening Guan Fu and closing.
2. The safe operation method of automatic time-delay closing according to claim 1, wherein:
the current of real-time supervision electricity side equipment is realized by collection system, includes:
the current transformer (14) is arranged on a power cable of the power-consumption side equipment, a transmitter (13) is arranged on a secondary loop of the current transformer (14) in series, and a transmitting output end of the transmitter (13) is electrically connected with a programmable logic controller (12).
3. The safe operation method of automatic time-delay closing according to claim 2, wherein:
setting a threshold value, displaying the running state of the electricity-using side equipment, and realizing the running state by an operating mechanism, wherein the running state comprises the following steps:
and a touch display screen (16), wherein the display screen (16) is in communication connection with the programmable logic controller (12).
4. The safe operation method of automatic time-lapse closing according to claim 3, wherein:
the programmable logic controller (12) is electrically connected with a relay group (19), and the relay group (19) comprises:
alarm relay KA1, stop relay KA2, closing relay KA3, overload relay KA4, start/stop action relay KA5, alarm relay KA1, stop relay KA2, closing relay KA3, overload relay KA4, start/stop action relay KA 5's coil is connected to the DO port department of programmable logic controller (12) electrically respectively.
5. The safe operation method of automatic time-delay closing according to claim 4, wherein:
in the step A and the initialization, a threshold value is set through a display screen (16), and the threshold value comprises:
overload current I max Calibrating by parameters of the power utilization side equipment;
warning time T Warning The starting time of the audible and visual alarm;
overload timeout time T Timeout of time Judging the tripping condition of a switch of the equipment at the electricity utilization side;
time delay closing time T Closing switch Judging the condition of reclosing after the switch of the equipment on the electricity side trips;
switching-on operation interval time T Spacing of Judging the tripping condition of the bus bar at the electricity utilization side;
delay start time T of motor Motor with a motor housing And judging the condition of switching on after the electricity-using side bus is tripped and switching on and switching off again by the electricity-using side equipment switch.
6. The safe operation method of automatic time-delay closing according to claim 4, wherein:
and B, in the operation:
manual/automatic switching, switching by means of a display screen (16);
the power side bus switch is switched on and started, and is controlled through a normally open contact of the starting/stopping relay KA 5;
switching on by using an electric side equipment switch, and controlling by using a normally open contact of a switching-on relay KA 3;
and C, in overload operation:
and comparing the current of the power utilization side equipment monitored in real time with a set threshold value, and processing the current by a CPU (Central processing Unit) of a programmable logic controller (12).
7. The safe operation method of automatic time-delay closing according to claim 4, wherein:
and in the steps of guaranteeing D, warning, timing and resetting:
and triggering of the audible and visual alarm is controlled through a normally open contact of the alarm relay KA 1.
8. The safe operation method of automatic time-delay closing according to claim 5, wherein:
and E, in the tripping/delay closing of the equipment switch:
tripping the equipment switch at the electricity utilization side, and controlling the equipment switch by stopping the normally closed contact of the relay KA 2;
and the electric side equipment switch is used for switching on, and the normally open contact of the switching-on relay KA3 is used for controlling.
9. The safe operation method of automatic time-delay closing according to claim 5, wherein:
and F, in the step of tripping and stopping the bus switch/starting the motor switch-on:
the tripping of the power-side bus switch is stopped, and the normally closed contact of the starting/stopping relay KA5 is used for controlling;
the power side bus switch is switched on and started, and is controlled through a normally open contact of the starting/stopping relay KA 5;
the normally closed contact of the start/stop relay KA5 and the normally open contact of the start/stop relay KA5 are interlocking circuits.
10. The safe operation method of automatic time-delay closing according to claim 5, wherein:
in the step G, the device is opened Guan Fu to be closed:
and the electric side equipment switch is used for switching on, and the normally open contact of the switching-on relay KA3 is used for controlling.
CN202310202969.6A 2023-03-06 2023-03-06 Safe operation method for automatic time-delay closing Pending CN116865427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310202969.6A CN116865427A (en) 2023-03-06 2023-03-06 Safe operation method for automatic time-delay closing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310202969.6A CN116865427A (en) 2023-03-06 2023-03-06 Safe operation method for automatic time-delay closing

Publications (1)

Publication Number Publication Date
CN116865427A true CN116865427A (en) 2023-10-10

Family

ID=88217753

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310202969.6A Pending CN116865427A (en) 2023-03-06 2023-03-06 Safe operation method for automatic time-delay closing

Country Status (1)

Country Link
CN (1) CN116865427A (en)

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