Transformer Oil 25#,45#

transformer oil.
Common specification includes 45# and 25#,which can meet the IEC standard and GB standard.
Specifications of Transformer Oil (IEC 296)

Uninhibited Oil
Inhibited Oil
Test Method
I
II
III
IA
IIA
III A
appearance
Clear, no suspended matter and precipitation
Clear, no suspended matter and precipitation

Density (30°C) Max.
895
895
ISO 3675
40°C Max.
16.5
11.0
3.5
16.5
11.0
3.5

-15°C Max.
800
-
-
800
-
-
-30°C Max.
-
1800
-
-
1800
-
-40°C Max.
-
-
150
-
-
110
Flashing point (close cup) Min.
140
130
95
140
130
95
ISO 2719
Pour point Max.
-30
-45
-60
-30
-45
-60
ISO 3016
The neutralization value after oxidation Max.
0.40
-

Under slung fat lute after oxidation Max.
0.10
-

Volatility acid no. 0.28 Min.


120


Water content
Delivery in bulk Max.

IEC 733
30
30

Delivery in drum Max.
40
40

Breakdown voltage
Untreated oil Min

ICE 156
30
30

Treated oil Min.
50
10

dielectric loss factor
(90°C) Min.
0.005
0.005
IEC 247

Specifications of Transformer Oil (GB2536-90)
Analytical items
Limits
Test Method
trademark
10
25
45

appearance
Clear, no suspended matter and mechanical impurities
visual
Density @20°C Max.
895
GB/T 1884~GB/T 1885
Kinematic viscosity@40°C Max.
13

13
11
GB/T 265
Kinematic viscosity@-10°C Max.
-
200
-
GB/T 265
Kinematic viscosity@-30°C Max.
-
-
1800
GB/T 265
Pour point°C Max.
-7
-22
report
GB/T 3535
Solidifying point°C Max.
-
-45
GB/T 510
Flashing point (close cup)°C Min.
140
135
GB/T 261
Acid no. Max.
0.03
GB/T 264
Oxidation stability:
1. Acid number after oxidation Max.
2. Precipitation after oxidation % Max.
0.05
SH/T 0206
Breakdown voltage(space between 2.5mm) Min.
35
GB/T 507
Dielectric loss factor (90°C) Max.
0.005
GB/T 5654