This type of current transformer adopts epoxy-resin vacuum casting and fully enclosed post structure, is applicable for power systems of rated frequency 50Hz or 60Hz rated voltage up to and including 10kV, used for electric energy metering, current measurement, and relay protection, it can be an arbitrary combination of classes 0.2S, 0.2, 0.5 and 10P.
It complies with the standards GB20840.1-2010 Instrument transformers-Part 1: General requirements, GB 20840.2-2014 Instrument transformers- Part 2: Additional requirements for current transformers, and JJG 313-2010 Instrument Current Transformers.
LZZBJ9-35D type current transformer is a 35kV dry type column indoor high voltage current transformer, the following are its main features and parameters:
Overview:
LZZBJ9-35D current transformer is suitable for rated frequency of 50Hz, rated voltage of 35kV power system, power supply gas measurement and electrical protection with
.
Product model number and meaning:
This type of current transformer has epoxy resin casting fully closed structure, suitable for indoor installations
The type of current transformer has epoxy resin casting fully enclosed structure, suitable for indoor installation.
Normal use conditions:
Ambient temperature: maximum 65ºC, daily average not more than 40ºC, minimum -45ºC.
Altitude not exceeding 1000m.
Installation place:
inside 35kV vacuum circuit breaker.
Atmospheric conditions:
the atmosphere is free from filth and aggressive and explosive media that seriously affect the insulation performance of the transformer.
Grounding method of the system:
neutral point non-effective grounding system
The system grounding method: neutral point non-effective grounding system.
Structural description:
The transformer is a fully enclosed pillar structure, resistant to pollution and humidity, small size, light weight, suitable for any position, any direction of installation. Single-variable-ratio primary winding is fixed; double-variable-ratio primary winding is connected in series and parallel, and two current ratios can be obtained by changing the primary wiring.
The primary winding of single-variable-ratio is fixed; the primary winding of double-variable-ratio is connected in series or parallel, and two current ratios can be obtained by changing the primary wiring.
Technical parameters:
Rated insulation level: 40.5/95/185kV.
Rated secondary current: 5A or 1A.
Partial discharge level in accordance with GB1208 "current transformer" standard.
Filth level: 2
NORMAL ENVIRONMENTAL USAGE
- Altitude: Should not exceed 1000m
- Ambient temperature:-5ºC~+40ºC
- Air Relative Humidity: Less than or equal to 85%
- Air relative site: Indoor.
TECHNICAL PARAMETERS
- Insulation level:12/42/75kV
- Power factor:cosΦ=0.8(lag)
- Rated secondary current: 5A or 1A
- Rated frequency: 50Hz or 60Hz
- Weight: 21kg
TRANSFORMER RATIO
| Rated primary current(A) |
Accuracy class |
Rated output(VA) |
Rated short-time thermal
current(kA/s) |
Rated insulation level(kA) |
| 5 |
0.2S
0.2S/0.5
0.2S/0.5/10P10
0.2S/10P10 |
10
10/10
10/10/15
10/15 |
0.36 |
0.9 |
| 10 |
0.72 |
1.8 |
| 15 |
1.08 |
2.7 |
| 20 |
1.44 |
3.6 |
| 25 |
1.8 |
4.5 |
| 30 |
2.16 |
5.4 |
| 40 |
2.88 |
6.3 |
| 50 |
3.6 |
7.2 |
| 60 |
4.32 |
8.1 |
| 75 |
5.4 |
13.5 |
| 80 |
5.76 |
14.4 |
| 100 |
7.2 |
18 |
| 120 |
8.64 |
21.6 |
| 150 |
10.8 |
27 |
| 200 |
14.4 |
36 |
| 250 |
18 |
45 |
| 300 |
21.6 |
54 |
| 400 |
28.8 |
63 |
| 500 |
36 |
72 |
| 600 |
43.2 |
108 |
| 800 |
57.6 |
120 |
| 1000-1500 |
172 |
144 |
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