CN212324507U - Mining explosion-proof and intrinsically safe programmable control box for water pump room - Google Patents
Mining explosion-proof and intrinsically safe programmable control box for water pump room Download PDFInfo
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- CN212324507U CN212324507U CN202022118671.1U CN202022118671U CN212324507U CN 212324507 U CN212324507 U CN 212324507U CN 202022118671 U CN202022118671 U CN 202022118671U CN 212324507 U CN212324507 U CN 212324507U
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Abstract
The utility model relates to a mining flame-proof and intrinsic safety type programmable control box for a water pump room, which comprises a flame-proof main cavity body and a flame-proof wiring cavity body, wherein the left side, the right side and the lower side of the flame-proof wiring cavity body are respectively provided with a cable leading-in device, the left front door panel of the flame-proof main cavity body is provided with an intelligent key board and a display screen, the right front door panel of the flame-proof main cavity body is provided with a glass observation window and a function knob, a nine-core wiring terminal and a wall-through terminal are arranged between the flame-proof wiring cavity body and the flame-proof main cavity body, a network switch is arranged inside the flame-proof wiring cavity body, a transformer, a programmable module group, an anti-surge and filtering module group, an intrinsic safety power supply and a, the programmable module group and the display screen are respectively connected to a network switch through network cables to carry out data exchange; the utility model has the advantages of convenient operation, many kinds of communication interfaces, strong compatibility, complete function and stable and reliable connection.
Description
[ technical field ]
The utility model belongs to the technical field of programmable control box technique and specifically relates to a mining flame proof and safe type programmable control box of essence for water pump room.
[ background art ]
The well-known mining explosion-proof programmable control box is used in mines with methane mixed gas and coal dust and explosion risks. As a main device of a field device of an automatic centralized control system of a coal mine underground water pump house, the state continuously strengthens the construction strength of the production automation of the coal mine water pump house, so as to realize the automation, the intellectualization and the informatization of the water pump house system in the early days. At present, most of mining explosion-proof programmable control boxes for water pump rooms in the market have the problems of single function, few cable leading-in devices and few communication interfaces, inconvenience is brought to users, and great influence is brought to automation, intellectualization and informatization construction of the coal mine water pump rooms.
[ contents of utility model ]
The utility model aims at solving foretell not enough and providing a mining flame proof and safe type programmable control case of essence for water pump room has convenient operation, communication interface kind is many, compatible strong, the function is complete, connect reliable and stable's advantage, has improved the security of flame proof equipment operation.
In order to realize the purpose, the mining explosion-proof and intrinsic safety type programmable control box for the water pump room comprises an explosion-proof cavity base 1, an explosion-proof main cavity 3 arranged on the explosion-proof cavity base 1 and an explosion-proof wiring cavity 2 arranged at the rear side of the explosion-proof main cavity 3, wherein cable leading-in devices 4 are arranged on the left side, the right side and the lower side of the explosion-proof wiring cavity 2, an intelligent key board 6 and a display screen 12 are arranged on a left front door panel 18 of the explosion-proof main cavity 3, the display screen 12 is connected with the intelligent key board 6 through a USB cable, a glass observation window 13 and a function knob 10 are arranged on a right front door panel 19 of the explosion-proof main cavity 3, the glass observation window 13 is used for observing the operation condition of devices inside the explosion-proof main cavity 3, the function knob 10 is used for selecting operation functions, and a nine-core wiring terminal 20 is arranged between the explosion-, Wear wall terminal 5 to carry out electrical connection through nine core binding post 20, wear wall terminal 5, the inside network switch 14 that is provided with of flame proof wiring cavity 2, the inside transformer 9, programmable module group 7, the surge and filtering module group 8, this ampere of power 16, switching power supply 17 of being provided with of flame proof main cavity 3, transformer 9 is used for inputing AC660V or AC127V alternating current, the voltage output end of transformer 9 is connected and is prevented surge and filtering module group 8, prevent surge and filtering module group 8 and connect this ampere of power 16, switching power supply 17 respectively, programmable module group 7, display screen 12 carry out data interchange in network switch 14 through the net twine connection respectively.
Further, the inner side on the right side of the explosion-proof main cavity 3 is provided with an isolating switch assembly 21, the outer side on the right side of the explosion-proof main cavity 3 is provided with a low-voltage cover opening and closing device 11 used for detecting whether a low-voltage cover is opened or not, the low-voltage cover opening and closing device 11 is electrically connected with the transformer 9 through the isolating switch assembly 21, and the transformer 9 stops supplying power when the low-voltage cover opening and closing device 11 detects that the left front door panel 18 or the right front door panel 19 is opened.
Further, a safety grid assembly 15 and a relay 22 are arranged in the explosion-proof main cavity 3, the programmable module group 7 is provided with a digital quantity IO input/output point, an analog quantity input/output point, an Ethernet interface, a DP interface and an MPI interface, the functional knob 10 and a peripheral digital quantity IO input are processed by the programmable module group 7 and then transmitted to the display screen 12, the safety grid assembly 15 is electrically connected with the programmable module group 7, and the safety grid assembly 15 processes a peripheral analog quantity signal and then transmits the processed signal to the programmable module group 7.
Further, the display screen 12, the safety barrier assembly 15, the intelligent key board 6, the relay 22 and the network switch 14 are respectively connected with the switch power supply 17 and powered by the switch power supply 17; IO point of programmable module group 7 in flame proof main cavity body 3, function knob 10 and outside control button on right front door panel 19, outside switching value input point, external sensor connect this ampere of power 16 respectively to supply power by this ampere of power 16.
Furthermore, a double-layer wiring terminal strip is arranged in the explosion-proof wiring cavity 2, and an external signal is connected to the double-layer wiring terminal strip through a cable leading-in device 4 and then connected to the inner side of the explosion-proof main cavity 3 through a wall-penetrating terminal 5.
Furthermore, the network cable in the flameproof main cavity 3 is connected to the network switch 14 in the flameproof wiring cavity 2 through the nine-core wiring terminal 20 and the optical fiber jumper wire through the wall-through terminal 5.
Further, the transformer 9 is electrically connected with the intrinsic safety power supply 16 and the switching power supply 27 through the isolation switch assembly 21, the low-voltage cover opening locking device 11 and the surge prevention and filtering module group 8, and the surge prevention and filtering module group 8 is used for filtering higher harmonics and sudden change voltage.
Further, the display screen 12 and the intelligent key board 6 are quickly connected through a USB cable to realize the functions of up, down, left, right, quitting and confirming.
Further, the display screen 12 is provided with an RS232 interface, an RS485 interface, an ethernet interface, and a USB interface, and the programmable module group 7 is provided with a DP interface, an MPI interface, and an ethernet interface, and has a digital IO input/output unit and an analog input/output unit.
Furthermore, 28 cable leading-in devices 4 arranged in an array are arranged on the left side of the explosion-proof wiring cavity 2, 35 cable leading-in devices 4 arranged in an array are arranged on the right side of the explosion- proof wiring cavity 2, and 12 cable leading-in devices 4 arranged in an array are arranged on the lower side of the explosion-proof wiring cavity 2.
Compared with the prior art, the utility model, have following advantage:
(1) the utility model effectively meets the requirement that the programmable control box is connected with more external input signals by greatly increasing the number of the cable leading-in devices, and is convenient for the connection of various sensors required by the automatic, intelligent and informatization construction of the water pump house;
(2) the utility model adds the surge prevention and filtering module group to effectively filter out higher harmonics and short-time voltage impact, which plays a role in guaranteeing the stability and reliability of the internal voltage of the programmable control box;
(3) the utility model adds the intelligent key board and the glass observation window, the intelligent key board makes the operation of the display screen more convenient, and the glass observation window makes the working personnel conveniently observe the operation status of each electric element group in the flame-proof main cavity body;
(4) the utility model is provided with a plurality of communication interfaces, supports a plurality of communication modes, meets the communication requirements of various conventional devices on site, and has strong compatibility and high site practicability;
(5) the utility model adopts the flat cable with the USB interface to quickly connect the intelligent key board and the display screen, so as to conveniently realize the quick operation functions of the display screen, such as up, down, left, right, quitting and confirming, thus leading the human-computer interface interaction function to be more friendly and the operation to be more convenient;
(6) the utility model integrates the functions of the original multiple devices, effectively reduces the cost and enhances the integration function and the automation level of the system;
(7) the utility model discloses have cable entry device in large quantity, communication interface kind many, convenient operation, the collection signal is complete, the integrated level is high, the wiring is convenient, compatible strong, the effect that the function is complete.
[ description of the drawings ]
Fig. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention;
fig. 3 is a right side view of the present invention;
in the figure: 1. the explosion-proof device comprises an explosion-proof cavity base 2, an explosion-proof wiring cavity 3, an explosion-proof main cavity 4, a cable leading-in device 5, a wall-through terminal 6, an intelligent key board 7, a programmable module group 8, an anti-surge and filtering module group 9, a transformer 10, a function knob 11, a low-voltage cover-opening locking device 12, a display screen 13, a glass observation window 14, a network switch 15, a safety barrier assembly 16, an intrinsic safety power supply 17, a switching power supply 18, a left front door panel 19, a right front door panel 20, a nine-core wiring terminal 21, an isolating switch assembly 22 and a relay.
[ detailed description of the invention ]
The invention is further described below with reference to the accompanying drawings:
as shown in attached drawings 1-3, the utility model provides a mining flame proof and safe type programmable control case of essence for water pump room, including flame proof cavity base 1, set up flame proof main cavity body 3 on flame proof cavity base 1 and set up the flame proof wiring cavity 2 at the 3 rear sides of flame proof main cavity body. The transformer 9 is arranged in the explosion-proof main cavity 3, an isolating switch assembly 21 and a low-voltage cover opening locking device 11 are arranged on one side of the transformer 9, two alternating currents of AC660V and AC127V can be input into the transformer 9, the output voltage of the transformer 9 is connected to an intrinsically safe power supply 16 through an anti-surge and filtering module group 8, the switching power supply 17 supplies power to a display screen 12 on a left front door panel 18, a safety barrier assembly 15, an intelligent key board 6 and a relay 22, the switching power supply 17 supplies power to a network switch 14 in the explosion-proof wiring cavity 2, the intrinsically safe power supply 16 supplies power to an IO point of a programmable module group 7 in the explosion-proof main cavity 3, a function knob 10 and an external control button on a right front door panel 19, an external switching value input point and an external sensor. The programmable module group 7 and the display screen 12 are connected with a network switch 14 through network cables for data exchange, the flameproof wiring cavity 2 and the flameproof main cavity 3 are electrically connected through a nine-core wiring terminal 20 and a wall-through terminal 5, a double-layer wiring terminal row is arranged in the flameproof wiring cavity 2, an isolating switch assembly 21 is arranged on the inner side of the right side of the flameproof main cavity 3, a low-voltage cover-opening locking device 11 is arranged on the outer side of the flameproof main cavity, an intelligent key panel 6 and a display screen 12 are arranged on a left front door panel 18, a glass observation window 13 and a function knob 10 are arranged on a right front door panel 19, the display screen is provided with an RS232 interface, an RS485, the programmable module group is provided with a DP interface, an MPI interface and an Ethernet interface and is provided with a digital input/output (IO) unit and an analog input/output unit, and the left side, the right side and the lower side of the explosion-proof wiring cavity 2 are respectively provided with a cable leading-in device 4.
By adopting the technical scheme, the number of the cable leading-in devices is greatly increased, the requirement that a programmable control box is connected with more external input signals is effectively met, and the signals of a camera, a vibration sensor, a pump body externally-attached temperature sensor, a motor operation opening and closing sensor and the like which are newly added on the site of a water pump room are convenient to be connected; the surge prevention and filtering module group is added to effectively filter out higher harmonics and short-time voltage impact, so that the stability and reliability of the voltage in the programmable control box are guaranteed; an intelligent key board is added, so that the operation of the display screen is more convenient; the glass observation window is added, and the working personnel can conveniently observe the operation condition of the electrical element group in the flameproof main cavity body.
The utility model discloses in, be provided with double-deck binding post row in the flame proof wiring cavity 2, external signal is connected to the double-deck wiring row in the flame proof wiring cavity 2 through cable introducing device 4 and then the rethread is worn wall terminal 5 and is connected to the inboard of flame proof main cavity body 3. The network cable in the flameproof main cavity 3 is connected to the network switch 14 in the flameproof wiring cavity 2 through the nine-core wiring terminal 20 and the optical fiber jumper wire through the wall-through terminal 5. And a wiring terminal insulating baffle is arranged between the wiring terminal of the power supply and the nine-core wiring terminal and between the wiring terminals of the power supply and the double-layer wiring row, so that the transmission of various signals is effectively separated and does not interfere with each other. Between the input and output signals of the peripheral equipment and the programmable module group 7, the through-wall terminal 5 is arranged to realize the electric connection and the transmission of low-voltage electric signals, and the through-wall terminal has the advantage of stable and reliable connection. The electric connection is realized through the isolating switch component 21, the low-voltage cover opening locking device 11 and the surge and filtering module group 8 between the transformer 9 and the intrinsic safety power supply 16 and the switching power supply 27, and the surge and filtering module group 8 plays a role in filtering higher harmonics and sudden change voltage and has the advantages of being stable and reliable in connection.
Be provided with the low pressure blocking device 11 that uncaps that is used for detecting whether the low pressure uncaps to open on the flame proof main cavity body 3, the low pressure is uncapped and is realized the electricity through being provided with isolator subassembly 21 between blocking device 11 and the transformer 9 and is connected, when 3 outside left front door panels 18 and the right front door panel 19 of flame proof main cavity body were opened, transformer 9 stopped supplying power, had improved the security of flame proof equipment operation, effectively guaranteed field device and personnel's safety. Programmable module group 7 is provided with digital quantity IO input/output point, analog quantity input/output point, ethernet interface, DP interface, MPI interface, and transmission is given to display screen 12 after programmable module group 7 is handled to function knob 10 and peripheral digital quantity IO input, and peripheral analog quantity signal is given programmable module group 7 to handle after safety grid subassembly 15 is handled, and the unified transmission is used for showing field device operating condition for the display screen at last for programmable control box has abundant signal acquisition unit and data communication interface, has stronger compatibility and data processing function.
The display screen 12 is quickly connected with the intelligent key board 6 through a USB cable to realize the functions of up, down, left, right, quitting and confirming; the display screen 12 is fixed on a left front door panel 18 of the explosion-proof main cavity 3, a glass observation window 13 is arranged on a right front door panel 19 and used for observing the running state of devices inside the explosion-proof main cavity 3, and the function knob 10 is used for selecting operation functions; the display screen 12 displays the operation condition of the equipment in real time and uploads data information through the network switch 14. The flexible operation of staff to the display screen, to equipment operating condition know in detail and control, to the inside device running state real-time observation of flame proof main cavity body of being convenient for. The communication interface in the flame-proof main cavity 3 specifically comprises an Ethernet interface, a USB interface, an RS485 interface, an RS232 interface, a DP interface and an MPI interface, supports various communication modes, and has strong compatibility and high field practicability. The left side of the flameproof wiring cavity 2 is provided with 28 cable leading-in devices 4, the right side is provided with 35 cable leading-in devices 4, the downside is provided with 12 cable leading-in devices 4, the quantity of the cable leading-in devices is greatly increased, the requirement that a programmable control box is connected into more external input signals is effectively met, the connection of a camera, a vibration sensor, a pump body externally attached temperature sensor, signals such as a motor operation opening and closing sensor, an operation console signal and various equipment input signals which are newly added in a water pump room is facilitated.
In the utility model, the input end cable of the transformer 9 in the flameproof main cavity 3 is connected to the flameproof wiring cavity 2 through the screw type wiring terminal and then connected to the external power supply through the cable leading-in device 4, and the transformer 9 can input AC660V and AC 127V; the network cable of the network switch 14 in the flameproof wiring cavity 2 is connected into the flameproof main cavity 3 through the nine-core wiring terminal 20, and the optical fiber jumper in the flameproof main cavity 3 is connected into the flameproof wiring cavity 2 through the wall-through terminal 5; the external input and output signals are firstly connected to the double-layer wiring row and then connected to the inside of the explosion-proof main cavity body 3 through the wall-through terminal 5. The right side of the explosion-proof main cavity 3 is provided with a low-voltage cover-opening locking device 11 for detecting whether the left front door panel 18 and the right front door panel 19 are opened or not, the low-voltage cover-opening locking device 11 is electrically connected with the transformer 9 through an isolating switch assembly 21, and when the left front door panel 18 and the right front door panel 19 outside the explosion-proof main cavity 3 are opened, the transformer 9 stops supplying power, so that the effect of improving the operation safety is achieved. The programmable module group 7 is provided with an Ethernet module, a CPU is provided with a DP interface and an MPI interface, the Ethernet module is connected to the network switch 14, and the display screen is provided with an Ethernet interface, a USB interface, an RS485 interface and an RS232 interface, supports various communication modes and has high practicability.
To sum up, a mining flame proof and essential safety type programmable control case for water pump room, including flame proof cavity base, flame proof cavity rear side on the base is flame proof wiring cavity, the front side is flame proof main cavity, flame proof wiring cavity's left side, right side, the downside all is provided with cable lead-in device, be provided with the display screen on the left front door panel in the flame proof main cavity outside, the intelligence keypad, the display screen is connected to the intelligence keypad through the USB cable, be provided with function knob on the right front door panel in the flame proof main cavity outside, the glass observation window, be provided with nine-core binding post between flame proof wiring cavity and the flame proof main cavity, wear the wall terminal, be provided with double-deck wiring row in the flame proof wiring cavity, the network switch, be provided with programmable module group in the flame proof main cavity, prevent surge and filter module group, the safety grid subassembly, the, This ampere of power, switching power supply, isolator subassembly, flame proof main cavity body right side are provided with the low pressure blocking device that uncaps. The mining flameproof and intrinsically safe programmable control box has the effects of large number of cable leading-in devices, convenience in operation, full signal acquisition, high integration level and convenience in wiring.
The present invention is not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and are all included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a mining flame proof and safe type programmable control case of essence for water pump room, includes flame proof cavity base (1), sets up flame proof main cavity (3) above flame proof cavity base (1) and sets up flame proof wiring cavity (2) at flame proof main cavity (3) rear side, its characterized in that: the explosion-proof wiring cavity comprises an explosion-proof wiring cavity body (2), and is characterized in that cable lead-in devices (4) are arranged on the left side, the right side and the lower side of the explosion-proof wiring cavity body (2), an intelligent key board (6) and a display screen (12) are arranged on a left front door panel (18) of the explosion-proof main cavity body (3), the display screen (12) is connected with the intelligent key board (6) through a USB cable, a glass observation window (13) and a function knob (10) are arranged on a right front door panel (19) of the explosion-proof main cavity body (3), the glass observation window (13) is used for observing the operation state of devices inside the explosion-proof main cavity body (3), the function knob (10) is used for selecting operation functions, a nine-core wiring terminal (20) and a wall-penetrating terminal (5) are arranged between the explosion-proof wiring cavity body (2) and the explosion, the flameproof wiring cavity (2) is internally provided with a network switch (14), the flameproof main cavity (3) is internally provided with a transformer (9), a programmable module group (7), an anti-surge and filtering module group (8), an intrinsic safety power supply (16) and a switching power supply (17), the transformer (9) is used for inputting AC660V or AC127V alternating current, the voltage output end of the transformer (9) is connected with the anti-surge and filtering module group (8), the anti-surge and filtering module group (8) are respectively connected with the intrinsic safety power supply (16) and the switching power supply (17), and the programmable module group (7) and the display screen (12) are respectively connected with the network switch (14) through network cables to carry out data exchange.
2. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: the explosion proof main cavity body (3) right side inboard is provided with isolator subassembly (21), the outside on explosion proof main cavity body (3) right side is provided with low pressure locking device (11) of uncapping that is used for detecting whether the low pressure uncaps, be connected through isolator subassembly (21) electricity between low pressure locking device (11) and transformer (9), transformer (9) stop supplying power when low pressure locking device (11) of uncapping detect left front door panel (18) or right front door panel (19) and open.
3. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 2, characterized in that: be provided with safety grid subassembly (15), relay (22) in flame proof main cavity body (3), programmable module group (7) are provided with digital quantity IO input/output point, analog quantity input/output point, ethernet interface, DP interface, MPI interface, transmission after programmable module group (7) are handled to function knob (10) and peripheral digital quantity IO input transmits display screen (12), programmable module group (7) are connected to safety grid subassembly (15) electricity, programmable module group (7) are passed to after peripheral analog quantity signal processing in safety grid subassembly (15).
4. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 3, characterized in that: the display screen (12), the safety barrier assembly (15), the intelligent key board (6), the relay (22) and the network switch (14) are respectively connected with the switch power supply (17) and are powered by the switch power supply (17); IO point of the programmable module group (7) in the explosion-proof main cavity (3), the functional knob (10) on the right front door panel (19), the external control button, the external switching value input point and the external sensor are respectively connected with the intrinsic safety power supply (16) and are powered by the intrinsic safety power supply (16).
5. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: the explosion-proof wiring cavity (2) is internally provided with a double-layer wiring terminal strip, and an external signal is connected to the double-layer wiring terminal strip through a cable leading-in device (4) and then is connected to the inner side of the explosion-proof main cavity (3) through a wall penetrating terminal (5).
6. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: and the network cable in the flameproof main cavity body (3) is connected to a network switch (14) in the flameproof wiring cavity body (2) through a nine-core wiring terminal (20) and an optical fiber jumper wire through a through-wall terminal (5).
7. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: through preventing isolator subassembly (21), low pressure blocking device (11) and preventing the surge and filtering module group (8) and realizing the electricity connection between transformer (9) and intrinsic safe power (16), switching power 27, prevent the surge and filter module group (8) and be used for filtering higher harmonic and sudden change voltage.
8. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: the display screen (12) is rapidly connected with the intelligent key board (6) through a USB (universal serial bus) flat cable so as to realize the functions of up, down, left, right, quitting and confirming.
9. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: the display screen (12) is provided with an RS232 interface, an RS485 interface, an Ethernet interface and a USB interface, and the programmable module group (7) is provided with a DP interface, an MPI interface and an Ethernet interface and is provided with a digital IO input and output unit and an analog input and output unit.
10. The mining flameproof and intrinsically safe programmable control box for the water pump house according to claim 1, characterized in that: the flameproof wiring cavity comprises a flameproof wiring cavity body (2), and is characterized in that 28 cable leading-in devices (4) arranged in an array mode are arranged on the left side of the flameproof wiring cavity body (2), 35 cable leading-in devices (4) arranged in an array mode are arranged on the right side of the flameproof wiring cavity body (2), and 12 cable leading-in devices (4) arranged in an array mode are arranged on the lower side of the flameproof wiring cavity body (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022118671.1U CN212324507U (en) | 2020-09-24 | 2020-09-24 | Mining explosion-proof and intrinsically safe programmable control box for water pump room |
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| CN202022118671.1U CN212324507U (en) | 2020-09-24 | 2020-09-24 | Mining explosion-proof and intrinsically safe programmable control box for water pump room |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400779A (en) * | 2022-01-18 | 2022-04-26 | 上海山源电子科技股份有限公司 | Rapid networking system and rapid networking method for underground unattended substation |
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2020
- 2020-09-24 CN CN202022118671.1U patent/CN212324507U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114400779A (en) * | 2022-01-18 | 2022-04-26 | 上海山源电子科技股份有限公司 | Rapid networking system and rapid networking method for underground unattended substation |
| CN114400779B (en) * | 2022-01-18 | 2022-11-04 | 上海山源电子科技股份有限公司 | Rapid networking system and rapid networking method for underground unattended substation |
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