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TBBFX10 (six) substantial voltage EPTTt capacitor box variety payment device
1. Overview
TBBFX type substantial voltage EPTTt capacitor box variety compensation full set unit (hereinafter referred to as the system) is a new type of EPTTt capacitor compensation comprehensive established gadget deveXiHu (West EPT) Dis.Hu (West EPT) Dis.ed by our company according to the box type variable condition on the basis of tbbf. It is divided into equivalent or unequal potential groups in accordance to the capacitor, and adopts EPT contactor or EPT circuit breaker and voltage and reactive EPTT computerized handle device to recognize automatic switching and control of capacitor lender The new system can instantly change bus voltage, compensate reactive EPTT, enhance voltage qualification charge and EPTT issue, and has the attributes of security, dependability, usefulness and fleXiHu (West EPT) Dis.bility, making total use of capacitor capacity and bettering performance.
According to the overall quantity of reactive EPTT to be compensated, the unit can be routinely switched on and off as a EPTT group, and several sub models with equal or unequal capacity can be created according to the specifications and demands. The voltage and reactive EPTT of the EPTT grid are detected by the computerized switching gadget, and the objective of automated switching capacitor is achieved by sensible handle and protection.
The gadget is suitable for 220kV and beneath substations in EPTT EPTTs, electric EPTT bureaus and massive factories and EPTs. In the six-10KV EPTT offer program, the reactive EPTT is immediately compensated and managed. The target cos phi or QC worth established by the consumer can be achieved by utilizing the switching operate of capacitor, so that the method voltage and reactive EPTT are in the best condition routinely.
2. EPTal conditions for use
two.one outside use
2.2 the altitude shall not exceed 2000m
two.3 the ambient air temperature is – twenty five ~ 40
2.4 relative humidity: day-to-day average no much more than ninety five%, month to month common no much more than ninety%
two.five the surrounding air is free from corrosive fuel, steam and other critical air pollution, no flamable gasoline, no EPT, no explosion hazard.
two.6 areas with out recurrent violent vibration.
two.7 the community or bus voltage EPTT offer side of the set up stage shall be free of charge from huge waveform distortion and the affect of large-orEPTTharmonic resource. The voltage waveform distortion rate and harmonic content material shall not exceed the provisions of GB / T14549-93 quotvoltage quality, general public EPTT grid harmonics quot.
3. Structural characteristics
TBBFX kind high voltage EPTTt capacitor gadget is of box sort composition. The capacitor financial institutions in the box are arranged in orEPTTof multi cabinet assembly like prefabricated substation. The EPTT cupboard is produced of higher-quality cold-rolled metal plate bending welding or EPT zinc coating plate bending assembly. The box physique is made of higher-high quality composite colour plate or metal plate, which has good heat insulation functionality and h2o-proof influence. There are one or double doorways in the JCEP and back again of the box, the leading, base and aspect sealing plates, and the air flow and heat dissipation home windows are established up, which has great warmth dissipation and air flow influence. An instrument place is set on the best of the cabinet in the box to organize and organize the relay safety gadget of the device cabinet. The system is mostly composed of a one EPTTt capacitor, outfitted with a single capacitor protection fuse, discharge coil, zinc oXiHu (West EPT) Dis.de arrester and CKS dry-kind sequence reactor (the reactor can also be peripheral), as nicely as reputable no re ignition, no bounce EPT contactor (or EPT circuit breaker and sulfur hexafluoride circuit breaker) as the grouping automated switching equipment of the EPTTt capacitor lender JCEP bar tin plating is adopted for connecting bus bar, and its shape and composition are revealed in Fig. 1 and Fig. two. The EPTT gadget is equipped with indication instrument and relay defense or microcomputer defense unit in accordance to device cupboard. The system has the adhering to qualities:
three.1 the EPTTt capacitor financial institutions with equal or unequal potential can fleXiHu (West EPT) Dis.bly realize the automatic handle of reactive EPTT with realistic payment
three.two straightforward framework, miniaturization of goods, 1 cupboard, 1 control unit, or multi cabinet management unit it can be divided into six units at most, and the compensation capacitance can be big or little, stunning physical appearance, convenient and fleXiHu (West EPT) Dis.ble assortment, and reduced investment decision
three.3 thanks to the team automated switching, the uEPTTzation price of capacitor is substantial
3.four the JCEP swap cabinet adopts the mixture of microcomputer protection measurement and manage and automatic switching system of capacitor financial institution, with total defense and manage perform and high EPTT degree
three.5 automatic and manual operation, fleXiHu (West EPT) Dis.ble operation, easy management, risk-free and reputable.
3.six it has RS232 or RS485 serial communication interface, which can be connected with other checking products in the substation to type the integrated EPTT technique of the substation, which can fulfill the specifications of numerous procedure and management modes these kinds of as unattended or less attended, centralized handle and so on.
three.seven it has more than temperature and above-voltage defense alarm and interior and external fault locking operate
3.8 high security overall performance, with incoming line isolation and grounding interlock, when the device is stopped, the EPT position and phase line can be grounded at the same time it has very good 5 prevention locking safety overall performance.
3.9 the products fulfill the specifications of GB 55717-1995 quotcode for layout of EPTTt capacitor system quot, JB / T7111-1993 quothigh voltage EPTTt capacitor unit quot and DL / t604-1996 quottechnical situations for ordering substantial voltage EPTTt capacitor gadget quot and other stXiHu (West EPT) Dis.Hu (West EPT) Dis.rds and pertinent complex stXiHu (West EPT) Dis.Hu (West EPT) Dis.rds.
4. Inspection, adjustment and test prior to operation of complete set of products
four.1 pre operation inspection
four.one.one the preparation and inspection of high voltage change cabinet prior to procedure shall be in accordance with the pertinent needs of its installation and procedure handbook.
four.1.2 the inspection and installation shall satisfy the requirements of Chapter five and Chapter 7. The automated switching part shall be carried out according to the specifications of its computerized handle guide.
4.one.three the outgoing line conclude and insulator shall be thoroughly clean without paint and hurt, and there shall be no neglected instruments and equipment on the tools.
4.one.4 the bus bar, spray stage-by-action fuse, and so forth. shall be connected appropriately and appropriately. The guide wire and indicator board shall experience outward and shall not be reversed. The length among the live component and the grounding part shall be ensured. The length between the live parts of distinct phases and the major grounding body shall be higher than the demands of appropriate stXiHu (West EPT) Dis.Hu (West EPT) Dis.rds.
four.one.five the site must be thoroughly clean and tidy, the grounding change ought to be opened, and the momentary grounding wire need to be eliminated.
4.one.6 examine regardless of whether the setting price of the safety relay satisfies the specifications. See eight.2 for the location benefit.
4.one.seven shut and lock the doorway to stop anybody from approaching the live element.
four.one.8 check out that all interlocking locks are dependable to make sure protected and reputable procedure of the gadget.
4.two relay security adjustment
4.2.one it is needed to ensure that all protecting relaEPTTare intact and their motion assortment shall be constant with the drawings.
four.2.two the over-voltage protection relay is established to one.one occasions the rated voltage of the unit and acts with a hold off of -sixty s
4.2.three the undervoltage defense relay operates at sixty% of the rated voltage of the unit
4.two.4 the over-recent relay shall not operate unEPTT1.3 instances of the rated existing of the capacitor financial institution. It shall be set at 1.six occasions of the rated recent of the capacitor lender and act with a delay of .five seconds.
four.2.five the over-current quick crack protection relay is set at five moments the rated present of the device, and the time restrict is .15s.
four.2.6 the double star shaped EPT line unbalanced present safety relay is set to function for .two-.five seconds when the breakdown time hold off of some sequence factors in a one capacitor is set. The dependability coefficient and JCEPtivity coefficient are 1.five and 1.five respectively.
four.two.seven the EPT line unbalanced present quick split defense relay is set at three-four occasions of the corresponding unbalanced hold off protection environment benefit, with a time limit of .2S.
4.2.eight solitary star open up delta zero sequence voltage safety relay is set to hold off when some sequence factors inside a solitary capacitor are broken down
2-.5 seconds. The reliability coefficient and JCEPtivity coefficient are 1.five and one.5 respectively.
4.2.nine the location value of zero sequence voltage fast split defense is four-8 instances of the environment benefit of zero sequence voltage delay protection.
4.three check
four.three.one relay defense action attribute check: when no large-voltage EPTT supply is related and numerous fault signals are input into the secondary circuit, the microcomputer defense relay shall be capable to function usually, and the higher-voltage circuit breaker shall be capable to change typically. In orEPTTto stay away from also many switching occasions of substantial voltage circuit breaker, little bus fuse can be eliminated. Throughout the check, the secondary wiring of voltage transformer ought to be taken off to avoid substantial voltage reverse EPTT.
four.three.2 1 moment examination of implementing rated voltage: confirm that the equipment and set up have the circumstances for voltage software, use the rated voltage for 1 minute, record the recent benefit of each stage, and notice regardless of whether the products has irregular phenomena. Then reduce off the EPTT source, operate in accordance to the running techniques, shut the grounding swap, and then examine the tools.
four.3.3 fault protection examination for inside factors of capacitor: it shall be performed following finishing the checks in eight.three.one and 8.3.two. The quantity of EPTTt capacitors in every period and every single arm is elevated and decreased in switch, and the failure of inner parts of capacitor and fuse fusing are EPTTlated equivalently. Regardless of whether the comprehensive established of devices can safeguard accurately in circumstance of failure is evaluated. The motion price of relay defense in every single fault condition is measured in the test.
four.3.4 examine the function of automated reactive EPTT controller, the on-off efficiency of team capacitor switching change and its secondary wiring. With no high-voltage EPTT provide, disconnect the fuse for solitary in excess of-current safety, and swap on and off the switching equipment in each capacitor cabinet by means of the guide method of reactive EPTT automated controller. Then set the transformation ratio of the existing transformer and the hold off time of group switching. The set price of the transformation ratio of the present transformer should be constant with that of the total existing transformer in the switch cabinet the setting benefit of the delay time must not be considerably less than 5 minutes. Prior to the gadget is set into operation, other parameters of the controller are set routinely by way of the programmable menu of the controller.
4.three.5 if the circumstances are satisfied, the inrush existing and switching overvoltage checks of the comprehensive established of devices shall be carried out, and the corresponding waveforms shall be recorded.
five. Operation, routine maintenance and overhaul
five.one when switching the capacitor bank automatically, according to the schematic diagram, very first change on the handle EPTT source, change the transfer switch to the automatic position, and then function the controller to EPTTr the automatic switching condition. When handbook switching is JCEP, turn the transfer change to the manual place, and then change the knobs one by 1 to the corresponding EPT or press the corresponding buttons to EPTTr the guide handle operation.
five.two the operator on duty shall make a detailed file of the operation. Within 24 several hours soon after the start of procedure, the bus voltage and the present of every section of the gadget ought to be observed often, and the capacitor must be checked when the load is light-weight.
five.three it is recommended to observe the procedure of all elements of the total established of gear as soon as every single hour. At lEPT after each and every three months, the surface of every single bushing, the shell and cabinet body of each and every EPT EPT shall be cleaned to avoid accidents caused by dust, dirt and blended humidity. Examine whether or not the EPT link is in good get in touch with and whether or not the nut is unfastened. If any issue is located, well timed manage it to avoid early injury of capacitor or equipment accident brought on by partial corona discharge.
5.4 in accordance to the reactive strength meter and ammeter on the large voltage switch cupboard, check the ability and load of the device, and the action of the security relay is Okay
Observe through sign relay and indicator light. If the system is in use, the relay protection action output to excursion, and ahead of obtaining out the reason and managing it appropriately, it is not allowed to force reclosing.
5.five when the transformer or EPTTt reactor is in demand, the transformer or EPTTt reactor shall be put into procedure first, and then the full set of compensation device shall be set into operation. When the transformer or EPTTt reactor is minimize off, the reverse treatment shall be followed to avoid existing resonance injury amongst the complete compensation unit and the program.
5.6 if the capacitor is ruined and replaced with a spare component or a new capacitor, it should be noted that the capability of the capacitor to be changed is the very same as that of the replaced capacitor as much as achievable, conference the specifications of 7.three.two.
five.7 preventive inspection and take a look at for major parts of the full established of tools, such as capacitance of capacitor, sequence reactor and mutual inductor
Insulation resistance, oil level, oil pressure, and so on., need to be carried out often in accordance to the corresponding use and servicing recommendations. The operation and servicing of substantial voltage switch cabinet shall be carried out in accordance to the specifications of its installation and operation guide.
