Discharge Coil Dry-Type
First. The purpose and scope:
Installed in the substation shunt capacitor group quit running, you must have a discharge device will charge itsintemal charge any freed.for the implementation of auto matic control switching of capacitorbanks are more requirements within the specified time the charge willbe released into the safe voltage. Curent domestic production installedin the intemal discharge resistor shunt capacitors have some morequality problems exist, the perfommance can not meet the requirementsof automatic switching, so installing a dedicated discharge coil is parallelcapacitor substation necessary technical security measures.
Based shunt capacitor and its supporting equipment in operationsafety and reliability of operation considerations, capacitor bank with asingle star connection is recommended use and has been widely usedas a wiring, respectively, and each of its discharge coil phase capacitorbank directly parallel, the secondary winding is connected in open deltawith protection relays connected as unbalanced voltage protectioncircuit as capacitor bank intemal protection. When the capacitor groupif any one phase of a particular stage with some of the componentsinside the capacitor damaged failure, unbalance voltage protectionrequested action can be detected and the switch, the capacitor prom-ptly disconnected from the grid, then the discharge coil shall be suffici-ently high to ensure the accuracy of the protection perfommance is achieved.
As well as a large collection of capacitors in parallel with a singlecapacitor capacity, mainly by the failure of the original intemal fuse tocut off the fault, and Ensure that the capacitor can continue to run. Dueto capacity imbalance will cause electrical fault and non-fault-phasecapacitor element of phase sound Pressure. Discharge coils withintermediate tap connected to the corresponding tap each phase cap-acitors were measured on the line and the tap Voltage of the point. ltstwo independent secondary windings connected in diferential modeand connected with protection relays, consisting of differential protectionback Road to the sound element voltage rises above the allowablevalue safety switch action in a timely manner the capacitor exit grid.Some large-capacity capacitor bank at the time of each phaseusing a large capacitor connected in series with more than two segm-ents, or choose a single volume Capacitors. At this time using a singleextemal fuse protection, its action is not easy to meet the requirementsof sensitivity, which can be used for high-sensitivity differential Protectionas a capacitor intemal fault protection. FDGRC discharge coil-typedifferential pressure measurement for its high accuracy to ensure theprotection of sensitive Requirements, FDGRC type discharge coil, highvoltage coil with a center tap A2, apply differential protection with theuse of shunt capacitors.A2 corresponding to the group of the capacitoris connected to the intermediate terminal, the voltage is 50% A1,Xvoltages.
10~35kV dry discharge coil is to meet the above requirementsand are ideal for non-oil installation site requirements.
Forth. The structural features
1 .the product uses epoxy resin vacuum casting structure to achieveoilfree, completely eliminating the leakage of flammable oils andother shortcomings;
2.the product is simple structure, good integrity, extremely easy toinstall and use;
3.the product is very robust, reliable, high mechanical strength;4.the use of epoxy resin vacuum casting process and strengtheninternal and extemal insulation strength of the product, the product'ssafety and reliability Greatly improved;
5.the product less maintenance, maintenance outage when usingonly surface contamination wipe the discharge coil can;
6.product technology, superior performance, fully compliant with JBT8970-1999,DL/T653-2009 standards;
7.the product conforms to the implementation of non-oil domesticpower transmission site management requirements, with goodenvironmental value.
Fifth. Environmental Conditions
1.the installation location: indoor2.Ambient temperature:-40~+55'C3.Altitude: not exceed 2000m.4. seismic levels: installation site no severe mechanical shock.5.the installation site: no harmful gases, vapors and non-conductive orexplosive dust.6.relative humidity: Monthly average temperature does not exceed90% of the daily average of less than 95%.
Seventh.
Installation and transport considerations
1. Connected with the high-voltage terminal of the capacitor bankshould adopt flexible cable, when using aluminum row connectionthe section should not exceed 30 x 4mm,And measures should betaken to close the terminal head telescopic site.2.discharge coil core and feet exposed should be grounded.3.the discharge coil mounting foot should be grounded, northern coldseason should ensure that routine maintenance, snow sweeperbody to prevent high-side short circuit.4.the machine should be placed in the transport balance, not upsidedown.5.handling should be noted, not against hard objects or scratches.6.prohibited secondary reverse polarity, short circuit the secondarycircuit and multi-point grounding.7.when the product side-mounted, secondary wiring cover up isstrictly prohibited.8.the product should be the lower side-mounted secondary wiringleads to prevent water from entering, resulting in secondary Wiringshorted.
Dry type
Oil type
FAQ
1. Question : Why choose us and trust us?
Answer : Good product, good price, and good service.
Company spirit: Practical innovation, sincerity to all
Core values: Customers' praise is the only value we exist.
Management concept: Pursuing excellent quality, creating first-rate services
2. Question : Where is your factory located ? How can I visit there ?
Answer: With an ISO90001 certified factory located in Yueqing city, Zhejiang Province, P.R.OF China.
It takes about 4 hours from SHANGHAI by high-speed rail and 45 minute by air.
It is very pleasure for all to visit us.
3. Question : Can you do OEM ?
Answer: Yes, we have the ability to do OEM /ODM to meet your requirements.
4. Question : What is the payment terms?
Answer: In general T/T, L/C, Paypal or others we can discuss.
5. Question :How about the delivery time?
Answer: Usually, if have enough in warehouse, the delivery time is within 3 working days.
If need produce, the lead time is about 10-20 working days according to quantity of the order.
6. Question : How about the shipping method?
Answer: For sample or small order, deliver by International express, such as DHL, FEDEX, TNT, UPS, EMS and so on.
For large order, deliver by sea or by air according to buyers shipping instructions.
How to contact us
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