CN203813702U - Explosion-proof high-pressure solid-state soft starter - Google Patents
Explosion-proof high-pressure solid-state soft starter Download PDFInfo
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- CN203813702U CN203813702U CN201420206757.1U CN201420206757U CN203813702U CN 203813702 U CN203813702 U CN 203813702U CN 201420206757 U CN201420206757 U CN 201420206757U CN 203813702 U CN203813702 U CN 203813702U
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Abstract
An explosion-proof high-pressure solid-state soft starter is characterized in that a power supply bus is connected with a knife switch of a high-tension switchgear; a zero-sequence relay at a lower end of the high-tension switchgear is connected with one ends of a solid-state soft start unit, a lightning arrester, a fuse an a vacuum contactor which are all disposed in an explosion-proof cabinet through copper bars or cables; the solid-state soft starter unit is connected with the other ends of a high-voltage motor and the vacuum contactor; the vacuum contactor (KM) is connected with a monitoring and alarming unit; the monitoring and alarming unit is connected with one ends of a current signal detector and a voltage signal detector; the other end of the current signal detector is connected with a current transformer; and the other end of the voltage signal detector is connected with the fuse. According to the explosion-proof high-pressure solid-state soft starter, the explosion-proof cabinet of the high-pressure solid-state soft starter is sealed and is made to be in a vacuum state, and sulfur hexafluoride (SF6) gas having good insulation performance and arc extinguishing performance is filled into the high-pressure solid-state soft starter. The explosion-proof high-pressure solid-state soft starter is suitable for coal mines containing explosive gases (e.g. methane) and coal dust, and can be utilized to perform soft startup, soft stop and pump stop on the high-voltage motor.
Description
Technical field
The utility model relates to a kind of solid soft initiator, specifically a kind of explosion-proof high-pressure solid soft starting device.
Background technology
At present, explosion-proof type high-voltage soft starting device, has been widely used in the underground mining of coal, draining, the explosion risk environment such as petrochemical industry, chemical industry, wine brewing, medicine, paint, weaving, printing and dyeing, military project facility; The explosion-proof high-pressure asynchronous motor of 6KV～10 KV.Explosion-proof soft starting device has two kinds of modes, one is to adopt explosion-proof casing sealing, the soft starting device deficiency of explosion-proof casing sealing is that volume is heavier greatly, and another kind is to adopt the mode of malleation explosion-proof, affects the external factor of the explosion-proof malleation cabinet of power safety mainly by operational environment and natural calamity.Explosion-proof malleation cabinet should be arranged on height above sea level below 2000 meters, air themperature ± 40 DEG C, and surrounding air is not answered high humility, high dust and high corrosion.Once occur that the outside steam condensation of explosion-proof malleation cabinet easily draws the appearance of opening electric conduction phenomena.Internal factor is the main cause in the explosion-proof malleation cabinet of current institute's power potential faults, can be divided into equally two kinds of the system failure and personnel's misoperations.The inner each parts of the explosion-proof malleation cabinet of power; as the possibility such as generator and transformer because the output of electric power system is unstable or the transmission fault of relay and the phenomenon such as occur quitting work; and at the explosion-proof malleation cabinet of most power already today of full-automation, the malfunctioning explosion-proof malleation cabinet of power that also may cause of the disconnection between system and the self-protection of explosion-proof malleation cabinet breaks down.As the explosion-proof malleation cabinet of power operating personnel, for rules and regulations do not understand or because operational order is loaded down with trivial details etc. former thereby occur misoperation, also can make the explosion-proof malleation cabinet of power produce fault, and positive pressure explosion-proof cabinet need to be monitored the interior gas pressure value of cabinet in a normal range (NR) always, if exceed certain value, need to outside cabinet, drain gas, if be less than certain value, need again to supplement gas in cabinet, so explosion-proof malleation soft starting device exists the deficiencies such as complex operation.
Summary of the invention
The utility model is for the deficiencies in the prior art; provide a kind of explosion-proof high-pressure solid-state soft starting device; this device is taking SEC-HVSS type high pressure solid soft initiator as core; on mine explosion-suppression is held concurrently the basis of safety electric magnetic actuator. only will originally directly start and stop changing into soft start and soft stop. and improve various protections and control system; eliminate to greatest extent electric motor starting machinery and electrical network have been impacted, the useful life of extension device.Be applicable to the colliery of containing damp (methane) and coal dust, exchanging 50HZ, voltage 10kV, 6kV, in the electric power systems such as 3kV. and the three-phase squirrel cage motor of the following electric current of 500A is carried out to soft start, constant current startup, full voltage starting, natural parking, soft stop, pump and stop.
The technical solution of the utility model is: the solid-state soft starting device of a kind of explosion-proof high-pressure, comprises high-voltage board, solid-state soft start unit, monitoring alarm unit, explosion-proof cabinet, current signal detection, voltage signal detection, vacuum contactor KM, lightning arrester 1-3FV, current transformer 1TA～2TA, voltage transformer TV, fuse FU1-3 and high-voltage motor; It is characterized in that: power source bus is connected with high-tension switch cabinet knife switch, the zero phase-sequence relay 3TA of high-tension switch cabinet lower end is connected with the one end of solid soft start unit, lightning arrester 1-3FV, fuse FU1-3, vacuum contactor KM in the explosion-proof cabinet of SF6 respectively by copper bar or cable; Solid soft start unit is connected with the other end of high-voltage motor M, vacuum contactor KM respectively; Vacuum contactor KM is connected with monitoring and alarm unit, monitoring and alarm unit are connected with one end that current signal detects and voltage signal detects, the other end that current signal detects is connected with current transformer 1TA～2TA, and voltage signal detects the other end and is connected with fuse FU1-3.
The utility model is being evacuated after the sealing of explosion-proof high-voltage solid-state soft starting device cabinet, then thering are good insulation property and the sulphur hexafluoride of arc extinction performance (SF6) gas is filled with high-voltage solid-state soft starting device.
The beneficial effects of the utility model are: the solid-state soft starting device of a kind of explosion-proof high-pressure, on mine explosion-suppression is held concurrently the basis of safety electric magnetic actuator. only will originally directly start and stop changing into soft start and soft stop. and improve various protections and control system, having eliminated to greatest extent electric motor starting impacts machinery and electrical network, taking the CPU microprocessor of SEC-HVSS monitoring and alarm unit as control core, CPU microprocessor carries out phase angle triggering to the thyristor of solid soft start unit, the voltage and current that thyristor conducting is changed be added on motor increases motor torque smoothly, the utility model is applicable to the colliery of containing damp (methane) and coal dust, exchanging 50HZ, voltage 10kV, 6kV, in the electric power systems such as 3kV. the three-phase squirrel cage motor to the following electric current of 500A carries out soft start, constant current starts, full voltage starting, naturally stop, soft stop, pump stops.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Fig. 1 is process structure schematic diagram of the present utility model;
Fig. 2 is circuit theory schematic diagram of the present utility model.
In the accompanying drawings, 1. power source bus, 2. high voltage startup frame, 3. copper bar, 4. explosion-proof cabinet, 5. solid soft start unit, 6. high-voltage motor, 7. SEC-HVSS-500 monitoring and alarm unit, 8. current signal detects, 9. voltage signal detects, KM. vacuum contactor, 1-3FV. lightning arrester, 1TA～2TA. current transformer, TV. voltage transformer, FU1-3. fuse.
Embodiment
The solid-state soft starting device of a kind of explosion-proof high-pressure, execution mode is as shown in Fig. 1 Fig. 2, power source bus is connected with high-tension switch cabinet knife switch, and the zero phase-sequence relay 3TA of high-tension switch cabinet lower end is connected with one end of the SF6 interior solid soft start of explosion-proof cabinet 4 unit 5, lightning arrester 1-3FV, fuse FU1-3, vacuum contactor KM respectively by copper bar or cable 3.Solid soft start unit 5 is connected with the other end of high-voltage motor 6, vacuum contactor KM respectively.Vacuum contactor KM is connected with SEC-HVSS-500 monitoring and the alarm unit 7 of our company's research and development production, SEC-HVSS-500 monitoring and alarm unit 7 are connected with one end of current signal detection 8 and voltage signal detection 9, the other end that current signal detects is connected with current transformer 1TA～2TA, and voltage signal detects 9 other ends and is connected with fuse FU1-3.After being evacuated after the sealing of explosion-proof soft high-voltage solid-state opening device cabinet, then thering are good insulation property and the sulphur hexafluoride of arc extinction performance (SF6) gas is filled with high-voltage solid-state soft starting device.
Operation principle is: the control core of the utility model SEC-HVSS monitoring and alarm unit 7 is CPU microprocessors, CPU microprocessor carries out phase angle triggering to the thyristor of solid soft start unit 5, the voltage and current that thyristor conducting is changed be added on motor increases motor torque smoothly, to reduce the electric current being added on motor by controlling at leisure the size of the thyristor angle of flow until motor accelerates to full speed running.When motor reaches after full speed running, when current of electric drops to the current value of normal full speed running, SEC-HVSS monitoring and alarm unit 7 have by a bypass output relay, make high-pressure vacuum contactor KM closure, thereby make thyristor bypass, high-voltage motor operating current is through bypass contactor so, prevents that the pressure drop that the thyristor conducting in soft start unit produces from drawing the thermal losses of opening, to increase work efficiency and reliability.Reduce the impact of starting current to electrical network and high-voltage motor.Also reduced the mechanical shock to being connected to other loads on motor, with the useful life of extension device, reduce fault and stop the repair time simultaneously.SEC-HVSS-500 monitoring and alarm unit 5 are by detecting voltage and current signal; soft opening device is carried out to the protections such as overvoltage, overcurrent, phase shortage; while breaking down, send warning information and shut down; detect the sulphur hexafluoride air pressure (SF6) in sealing cabinet 4 by pressure sensor; when the interior sulphur hexafluoride of cabinet 4 (SF6) hypertonia or too low; send warning information, and send instruction make high-voltage motor shut down.
Claims (1)
1. the solid-state soft starting device of explosion-proof high-pressure, comprises high-voltage board, solid-state soft start unit, monitoring alarm unit, explosion-proof cabinet, current signal detection, voltage signal detection, vacuum contactor KM, lightning arrester 1-3FV, current transformer 1TA～2TA, voltage transformer TV, fuse FU1-3 and high-voltage motor; It is characterized in that: power source bus is connected with high-tension switch cabinet knife switch, the zero phase-sequence relay 3TA of high-tension switch cabinet lower end is connected with the one end of solid soft start unit, lightning arrester 1-3FV, fuse FU1-3, vacuum contactor KM in the explosion-proof cabinet of SF6 respectively by copper bar or cable; Solid soft start unit is connected with the other end of high-voltage motor, vacuum contactor KM respectively; Vacuum contactor KM is connected with monitoring and alarm unit, monitoring and alarm unit are connected with one end that current signal detects and voltage signal detects, the other end that current signal detects is connected with current transformer 1TA～2TA, and voltage signal detects the other end and is connected with fuse FU1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420206757.1U CN203813702U (en) | 2014-04-26 | 2014-04-26 | Explosion-proof high-pressure solid-state soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420206757.1U CN203813702U (en) | 2014-04-26 | 2014-04-26 | Explosion-proof high-pressure solid-state soft starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813702U true CN203813702U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420206757.1U Expired - Fee Related CN203813702U (en) | 2014-04-26 | 2014-04-26 | Explosion-proof high-pressure solid-state soft starter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203813702U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239440A (en) * | 2018-10-17 | 2019-01-18 | 新疆金风科技股份有限公司 | DC current sampling apparatus, method and modular multilevel converter system |
| CN111525841A (en) * | 2020-05-13 | 2020-08-11 | 苏州艾克威尔科技有限公司 | Mining soft starter with infrared control |
| CN113965107A (en) * | 2021-10-28 | 2022-01-21 | 西安热工研究院有限公司 | High-capacity low-voltage motor starting protection system |
-
2014
- 2014-04-26 CN CN201420206757.1U patent/CN203813702U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239440A (en) * | 2018-10-17 | 2019-01-18 | 新疆金风科技股份有限公司 | DC current sampling apparatus, method and modular multilevel converter system |
| CN111525841A (en) * | 2020-05-13 | 2020-08-11 | 苏州艾克威尔科技有限公司 | Mining soft starter with infrared control |
| CN113965107A (en) * | 2021-10-28 | 2022-01-21 | 西安热工研究院有限公司 | High-capacity low-voltage motor starting protection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20170426 |
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| CF01 | Termination of patent right due to non-payment of annual fee |