Inhibicinė transformatorių alyva

Elektroizoliacinės inhibuotos alyvos

Rūšis

Klampumas prie 40ºC, mm2 /s

Pramušimo  įtampa, kV

Pliūpsnio temperatūra PMCC, ºC

Stingimo temperatūra ºC,

Panaudojimas, savybės

 

Repsol

Electra 3X

 

 

12,0

 

 

min 30

 

 

160

 

 

-40

Inhibicinė insuliacinė alyva transformatoriams,

perjungėjams ir bendrai elektros įrangai. UNE EN 60296:2004; CEI 60296 Type I; ASTM D-3487 Type 2 (Inhibituota)

 

Molylub

Synth TRS-TRi

9,2 > 55 170 -60

Sintetinės technologijos ekstremaliai žemų temperatūrų aplinkos, ypač aukštos pramušimo įtampos prailginto keitimo antioksidacinė transformatorinė alyva.

 

Inhibicinės transformatorinės alyvos parinkimas

Naujos kartos sintetinės technologijos labai gerai išvalytos hidrotreatingu Ultra-švarios bazininės alyvos ir specialių anti oksidacinių priedų pagrindo, inhibicinė insuliacinė terpė tranformatoriams. Tai specialiais inhibitoriais pagerintas elektros izoliavimo skystis skirtas naudoti ten, kur yra reikalingas labai didelis oksidacinis ir dielektrinis atsparumas bei puikaus darbo žematemperatūrinėje aplinkoje savybės

___________________________  Pritaikymas

·   transformatoriams ir perjungėjams

·   aukštos įtampos jėgainėms, elektros pastotims

·   alyva aušinamiems rektifikatoriams

·   elektros varikliams, kuriu apvijos tepamos bedraja karterine guolių ir perdavimo mechanizmų tepimo sistema

·   Elektros įrangos tepimo sistemų papildymui, kai pirminio užpildymo tepalas tampa netinkamu tolesniam naudojimui

____________________________ Privalumai
  • Puikios aušinimo, dielektrinės ir karščio nuvedimo savybės
  • Labai atspari oksidacinei degradacijai
  • Ypač aukšto grynumo, precizinio valymo ir sausumo
  • Saugus aukštas pliūpsnio taškas ir aukštatemperatūrinės  bei antioksidacinės temperatūrų aplinkoje charakteristikos
  • Žemas dielektrinės sklaidos faktorius (galios faktorius Tg)
  • Puikios žematemperatūrinės savybės užtikrinančios saugų transformatorinės sistemos darbą žiemos lauko slygomis ir šalto paleidimo metu
  • Sudėtyje nėra kenksmingų aplinkai PCM / PCB / PCT bei sieros priedų
__________________________ Specifikacijos
 
 
  • UNE EN 60296:2004; CSA C50-08 (Class A and B), ASTM D3487; DOBLE TOPS
  • ASTM D-3487 Type 2 A (Inhibicinė)
  • IEC 60296; CEI 60296 Type II

 

 

 

                                                                      

 

____________________________ Techninės charakteristikos

 

Vnt

METODAS

Reikšmė

Kinematinis klampumas prie   40ºC

cSt

ASTM D 445

9,2

Kinematinis klampumas prie  -40ºC

cSt

ASTM D 445

1.230

Tankis      prie  15ºC

g/ml

ASTM D 4052

0,835

Pliūpsnio taškas  (min)  

ºC

ASTM D 92

170

Stingio taškas       (max)    

ºC

ASTM D 97

-60

Pramušimo įtampa, 60Hz

kV

ASTM D877

> 55

Pramušimo įtampa, impuls

kV

ASTM D3300

> 300

Didžiausias dielektrinių nuostolių kampo tgd, esant 90°C

-

UNE EN 60247

< 0,001

Drėgmė

ppm

ASTM D6304

<25

Rūgštingumas TAN

mg KOH/g

IEC 61125C

< 0,01

 

Transformatorinė alyva su inhibiciniais priedais

Transformer Oil IEC 60296 inhibited

Most mineral oil dielectric fluids contain an added oxidation inhibitor

which is a chemical additive that acts as a preservative. The purpose of the inhibitor is to prevent oxygen from reacting with the oil, thus slowing the aging rate of the oil (and also of the solid insulation). The two most common oxidation inhibitors used in transformer oils are 2,6-ditertiarybutyl para-cresol (DBPC) and 2,6-ditertiary-butyl phenol (DBP). DBPC is also known as butylated hydroxytoluene (BHT).

SDMyers determines the total concentration of oxidation inhibitor (of DBPC and/or DBP) in transformer oil using a Fourier Transform Infrared (FTIR) spectrometer and following the ASTM method D 2668. We consider an inhibitor concentration of less than 0.1% (by weight) to be unacceptable, because in this range, the concentration of inhibitor is too low to adequately protect the oil from oxidation. When the inhibitor level drops to below 0.1%, we recommend that the oil be re-inhibited and inhibitor added to bring the concentration up to 0.3%.

In some cases, the transformer may be equipped with an oil preservation system designed to keep dissolved oxygen at a low level (below 1000 ppm). Such a system could be in the form of an active nitrogen system (a nitrogen tank or generator), or a conservator tank containing a rubber diaphragm (bladder). Using inhibited oil is not required in these situations; however, having inhibited oil will provide additional protection against oil oxidation if the oil preservation system were to ever fail.

Reinhibiting is done by hiring a contractor who is experienced in reinhibiting transformers. Once the contractor connects the oil processing equipment to the transformer, they will typically heat the oil and circulate it (also referred to as passes) through an adsorbent material such as Fuller’s Earth or activated alumina. These passes will remove old inhibitor, acid precursors (such as peroxides), low levels of acids, and other polar contaminants that may have formed. Removing these contaminants is necessary because the presence of contaminants in the oil and solid insulation will cause them to age and degrade much more rapidly.

Next, the contractor will typically add a concentrated solution of DBPC inhibitor into the oil stream that is returning to the transformer. This process must be monitored to assure that the moisture content of the oil containing the inhibitor mixture is below 10 ppm (parts per million). The final concentration of inhibitor needs to be 0.3% by weight. It should also be noted that if the acid number of the oil has risen to 0.06 mg KOH/g or higher (considered a questionable range) or if the IFT of the oil has dropped to 31.9 mN/m or less (also a questionable range), then the oil may need additional oil processing followed by reinhibiting. In this case, hot oil cleaning (oil processing through an adsorbent material) will first need to be performed to clean both the oil and the solid insulation in the transformer.

Typically, a transformer is de-energized when reinhibiting and hot oil cleaning are performed. These processes may be performed on an energized transformer, but it is extremely important to select a contractor who is experienced in energized reinhibiting or energized hot oil cleaning. This type of contractor must have the knowledge to properly evaluate the circumstances and determine whether energized processing can be done safely and with the proper equipment and expertise.

Transformer Oil Inhibited

is a highly refined, efficient performance inhibited transformer oil, formulated with a mineral base stock providing good dielectric strength and low temperature properties. This oil offers good oxidation stability. Customer benefits • High dielectric strength • Good low temperature properties • Oxidation stability helps ensure long oil service life • Oil passes 2006 Oil/Copper interactions tests as described in ASTM D 1275B Applications • Transformer Oil Inhibited is used as an insulating oil in transformers, switch-gear, inductors, condensers, transducers and similar equipment, also for low temperature operation in outdoor use. It insulates currentcarrying parts from each other and from ground, carries away heat, prevents glow discharges, extinguishes electric arcs in switchgear, and impregnates insulating materials