Qualitéit

Difference Between HVC and other High Voltage Capacitors.

Qualitéit;column will be most interested and mostly concern by serious newfriends!
Hei sinn grouss Erklärung fir wichteg technesch Parameteren:

Isolatioun Resistanceor IR as the name suggests is the resistance oftheinsulation.IR actually
protects electrical equipment from short circuit.IR valuesare generally very high in therange of Mega-ohm or Mohm.

Temperatur ass souguer gemaachdepends on whether the dielectric isClass 1orClass 2. A ceramic
capacitor (especially the class 2) often has highdissipation factor, high frequency coefficient ofdissipation.

Dissipatiounsfaktor (tan δ):or DF is defined as the ratio of the ESR and capacitive reactance.It is the
dissipation factor is alsoknown as the tangent of the loss angle and is commonly expressed in percent.
Recognized standards express the dissipation factor at specific frequenciestypically 120Hz for Aluminum
electrolytic and Tantalum capacitors while for film capacitors is 1 kHzand 1 MHz for ceramic capacitors.

Partial Discharge (PD):is an electrical discharge or spark that bridges a small portion of the insulation
tëschent zwee Orchesterdirigéieren electrodes.PD op all Punkt vun der Isolatioun System geschéie kann, wou d'elektrescht Feld
Kraaft méi Decompte Stäerkt vun deem Deel vun der isoléierend material.PD kann an Void geschéien am
staark Isolatioun, ganzer Fläch Material wéinst Qualitéit oder Bunnstéierunge vun isoléiert, bannent Gas Loftblosen
zu flësseg Isolatioun oder ëm eng Elektroden zu Gas (Corona Aktivitéit).

Dielectric Material:

For example, a Z5U capacitor will operate from +10 °C to +85 °C with a capacitance change of at most +22% to −56%. An X7R capacitor will operate from −55 °C to +125 °C with a capacitance change of at most ±15% .HVC's N4700 Dielectric Material: similar to other company, electroceramicsdetermine the major feature of the caps. HVC spend 3 years and millions of $ to inventpatented strontium titanate , which is N4700 type.ThisN4700 material provide a very good high frequency feature , excellent huge insulation resistance and tinydissipation factor and super long life up to 20 years.

Technesch Antrach Se:
Fir d'Clienten den HVC Element an der Tiefe kennen ze loossen, weisen mir den HVC technesch Spezifikatioun vergläichen mat verschiddene existenten
Mark aus Europa an North Amercia.

Amercian Brand E *****
They offer only ceramic disc caps, offer same to HVC's dielectric material X5F.
dissipation Factor for X5F is 1.5%;
HVC X5F component can be Dissipation Factor value to 1%.

Maximun Volt weisen op Katalog 30Kv, 2200pf;
HVC's Show am Katalog (normale Produktioun) 50Kv, 3300pf.

Flash Testen 130% vun Bewertung Volt, wéi 30Kv, weilt Test 40KvDc ginn.
D'Dielektresch Kraaft vum HVC kann 150% bis 200% sinn, heescht wärend d'Notesspannung 30Kv ass, kann de Flash Tester widderstoen
45Kv zu 60KvDc.

Temperature Charakteristiken: (NP0 zu Z5U)
HVC’s temperate characterstics : (N4700,Y5T,Y5U)

Europäesch Brand G ******:
Theyoffer only doorknob capacitor.
10Kv max capacitance 8000pf, iwwerdeems Sekonn ginn selwecht 8000pf, selwecht N4700 Typ Material;
20kv max capacitance 4000pf, iwwerdeems Sekonn 10000pf kann;
30kv max capacitance 2700pf, iwwerdeems Sekonn 3300pf kann;
40kv max capacitance 2000pf, iwwerdeems Sekonn selwecht 2000pf ginn;
50kv max capacitance 1700pf, iwwerdeems Sekonn kann 15000pf (Y5V) an 5000pf (Y5T).

G******:use N4700 material, Dissipation Factor be 0.3% max,while HVC always be around 0.1% and never higher
wéi 0.2%
G******:Insulation resistance 10,000mOhm(N4700) min, while HVC most time can be 200,000mOhm(N4700) min.

American Popular Brand H**:
Theyoffer only door knob capacitor, wildly use in North Amercian market.

Net wëssen, d'dielectric Material, dissipation Faktor Wäert max 0.5% ginn, iwwerdeems Sekonn majorly N4700 dielectric benotzen
Material, Faktor dissipation ginn nëmmen 0.1% ze 0.2%, déi Zäit 0.1% nëmmen.

North American Famous Brand H***:
They widely sold in NorthAmerica,Russia,Japan etc.offer both ceramic disccapacitor anddoor knob capacitor.
For ceramic disc caps,only Y5P,Y5U dieletric materialavailable,those offer not so good temperature coefficient,while
Sekonn Offer N4700 fir Keramik disc Mutzen.

Highest voltage capacitanceavailability, H*** show is 20Kv 4700pf(Y5U),while HVC offer 50KV 3300pf(Y5T).
D'Isulatiounsbeständegkeet ass min 1000mOhm, wärend den HVC's IR kann 10 000mOhm sinn
Dissipatiounsfaktor ass 5% max (Y5P), wärend den HVC's maximal DF 2% ass (Y5U, Y5V)

European Brand M*****:
World famous company, offer doorknob capacitorin different range,dieletric material in Y5U andN4700 level.
This big name’s product very concern to partial dischargevalue,their item can be very low pc on rated
AC voltage,While HVC offer nearlly same quality level of lowpC.
Partial Discharge value beN4700 material with Insulation Resistance>=1011ohm ,While HVC’s own N4700 material be double,min 2x1011ohm

Japanese World Famous Brand T**:
This manufacturer is world class passive component manufacturer, with quite a lot different production
plant inthe world, they also produce door knobcapacitor,and invent their own ceramic material.dieletric material
be Z5T,Y5P andY5S, those all only soso temperature coefficients,they don’t have N4700material level,which
offer the high frequency and high dielectric strength function. Even moreY5S is a kinds of material not PB free.
But comply toRoHS “EU Directive2002/95/EC, lead,cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE,have not been used, except for exempted applications” forhigh
voltage application, not need be lead free.But not leadfreeitem can’t accpet by the some serious client.Biggest
voltage capacitance rate only 50kv 2100pf,but cansee 20kvAC 1080p,this 20kvAC can be roughly equal to80kvDC.
While HVC now able to make150kvDc(50kvAC),800pf item, we HVC have higherproduction abilityfor higher end
application.Insulation Resistance be 100,000mOhm min,while HVC’s max I.R is double,min in 200,000mOhm.

Präis Se Rikkert an aner:
From above we know HVC’s quality level is quite high, we are among thesame quality levelof world famous brand
Vishay,TDK,Murata,Morganetc… And we are sure in 20% to 30% lower cost in general.

Leadtime Se Rikkert an aner:
HVC's standard production lead time for door knob capacitor be 60 days (8 weeks),while normallytop brands need14 week
Flexibilitéit Se Rikkert an aner:
HVC's capacitor also offer flexible type component, like GIS (GasInsulated Switchgear)customer,theyusuallyneed a smaller
size of high cap, we offernon-encapsulation cap to meet strictrequirement. Whileother manufacturernot flexible likeus,or ask for quite big MOQ.