Oil Immersed Inductive Voltage Transformer shall be suitable for measurement control and relay protection in the outdoor AC power system of nominal voltage 40.5~252kV, and frequency of 50 or 60Hz.
Inductive instrument transformer of JDX series shall be suitable for measurement control and relay protection in the outdoor AC power system of nominal voltage 40.5~252kV, and frequency of 50 or 60Hz, this type voltage transformers are oil immersed electromagnetic voltage transformer. The core was used cold-rolled silicon steel strip to folded single-column and three pairs of the same potential with the ground. High voltage coil main insulation chose sheet paper, small oil clearance and large structures. It was wounded as pagoda-shaped segments. High-voltage leads were insulated by a condenser bushing. We select corrugated metal expander as oil temperature variation compensator and can inspect the oil level through window. Fuel tank and the lower tank welded together, and all the other seals are made of sealed limit, effectively preventing the leakage of oil. Outline dimensions drawing and structure shown in Figure 1.
一、Service Conditions
a. Ambient air temperature: maximum 40℃, minimum -40℃, average value of the ambient air temperature does not exceed 30℃ measured during a period of 24h.
b. Altitude: The altitude does not exceed 1000m (this is the routine requirement, if there is any different requirement, we can provide the products with 2000m, 3000m, 4000m or 5000m altitude according to the clients’ requriments).
c. The average value of the relative humidity does not exceed 95% at 25℃ measured during a period of one month.
d. The maximum wind speed does not exceed 34m/s.
e. Eerthquake intensity does not exceed 8 degree.
f. There have to be no gas that may seriously affect the insulation and conductive ability of electric equipments, steam, ash, salt, chemical deposit, pollution and corrosive or explosive material.
二、Main Technical Parameters
三、Arcing distance and creepage distance of outer insulation please see table 1.
|
Rated voltage (kV) |
Arcing distance (mm) |
Creepage Distance (mm) |
||
|
Pollution Level Ⅱ (W1) |
Pollution Level Ⅲ (W2) |
Pollution Level Ⅳ (W3) |
||
|
35 |
≥410 |
≥810 |
≥1013 |
≥1256 |
|
66 |
≥720 |
≥1450 |
≥1813 |
≥2248 |
|
110 |
≥1010 |
≥2520 |
≥3150 |
≥3906 |
|
132 |
≥1160 |
≥2900 |
≥3625 |
≥4495 |
|
150 |
≥1350 |
≥3400 |
≥4250 |
≥5270 |
|
220 |
≥2010 |
≥5040 |
≥6300 |
≥7812 |
四、Insulation requirements for the primaries please see table 2.
|
Rated voltage (kV) |
35 |
66 |
110 |
132 |
150 |
220 |
|
|
Power-frequency withstand voltage (r.m.s) (kV) |
95 |
140 |
230 |
275 |
325 |
460 |
|
|
The wet test for the current transformer of power-frequency withstand (r.m.s) (kV) |
95 |
140 |
230 |
275 |
325 |
460 |
|
|
Rated lightning impulse withstand voltage (peak) (kV) |
200 |
325 |
550 |
650 |
750 |
1050 |
|
|
Chopped ligtning impulse voltage (peak) (kV) |
230 |
373 |
635 |
750 |
865 |
1208 |
|
|
Partial discharge level |
Prestressing performed voltage (r.m.s) (kV) |
76 |
112 |
184 |
220 |
260 |
368 |
|
Test voltage 1.2Um or Um (kV) PD≤10pC |
49 |
87 |
126 |
145 |
170 |
252 |
|
|
Test voltage 1.2Um/ (kV) PD≤5pC |
28 |
50 |
87 |
100.5 |
118 |
175 |
|
五、Mechanical requirements for the primary terminals please see table 3.
|
Rated voltage (kV) |
35 |
66 |
110 |
132 |
150 |
220 |
|
|
Mechanical requirements (horizontal of two directions and vertical) (N) |
Load |
– |
500 |
1000 |
1000 |
1000 |
1000 |
|
Applied to the primary terminals with duration (s) |
– |
60 |
60 |
60 |
60 |
60 |
|
六、Dimensions Of The Inductive Voltage Transformer
1.The outline and installation dimensions please see drawing 1.
2. The dimensions of the primary termanils please see table 4.
|
Rated Voltage kV |
H1 mm |
H2 mm |
A mm |
B mm |
C mm |
D mm |
|
35 |
1340 |
410 |
550 |
700 |
450 |
20 |
|
66 |
1720 |
720 |
550 |
700 |
450 |
20 |
|
110 |
2090 |
1010 |
670 |
710 |
450 |
20 |
|
132 |
2240 |
1160 |
670 |
710 |
450 |
20 |
|
150 |
2430 |
1350 |
670 |
710 |
450 |
20 |
|
220 |
3860 |
2010 |
680 |
900 |
600 |
24 |
Notes: There may be any change of the dimensions for the inductive voltage transformer because of renewing, the clients must basis on the updated drawings.
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