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China LZZB9-35D Indoor Epoxy Resin Casting Current Transformer - Suppliers & Factory Direct Sale
General
It is designed for use in power systems with a rated frequency of 50 or 60 Hz and a rated voltage of 35 kV and below, installed indoors. It is mainly used for electric energy metering, current measurement, and relay protection. This type of current transformer is generally used in air insulated switchgear rated at 6 to 35 kV.
Standards
IEC61869.1-2007
Instrument transformers Part 1: General technical requirements
IEC61869.2-2012
Instrument Transformers Part2: Complementary technical requirements for current transformers
GB311.1-1997
Insulation and coordination of high-voltage transmission and transformation equipment
GB 5583-1985
Partial discharge measurement of instrument transformers
GB/T 22071.1-2008
Instrument Transformer Test Guidelines Part I: Current Transformers
JJG 1021-2007
Electrical Transformer Verification Regulations
Service conditions
- Ambient temperature: Maximum temperature + 40℃; Minimum temperature - 5℃. The average daily temperature does not exceed 30℃.
- Altitude: not exceed 1000m.
- Other Conditions of Use: The effects of insolation radiation can be ignored.
- The ambient air is free of obvious dust, smoke, corrosive gases, steam or salt.
- Humidity conditions are as follows:
- The average relative humidity measured within 24h does not exceed 95%.
- The average water vapor pressure within 24h does not exceed 2.2kPa.
- The average relative humidity in one month does not exceed 90%.
- The average water vapor pressure in One month does not exceed 1.8kPa.
Technical data
- Rated insulation level: 40.5/95/185kV
- Rated frequency: 50Hz or 60Hz
- Rated secondary current: 5A or 1A
| Rated primary current (A) | Accuracy class combination | Accuracy class and rated output | Short time thermal current (kA/s) | Rated dynamic current (kA) | Weight (kg) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.2(S) 0.5(S) | 0.5 | 5P20 | 5P25 | 5P30 | kA | S | ||||
| 20-100 | 0.2(S)/5P 0.5(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/0.5(S)/5P/5P |
30 | 30 | 30 | 25 | 20 | 150│1n | 2 | 375│1n | 140 |
| 150 | 25 | 1 | 63 | |||||||
| 200-250 | 31.5 | 1 | 80 | |||||||
| 300-500 | 31.5 | 2 | ||||||||
| 600-800 | 31.5 | 4 | ||||||||
| 1000-3150 | 31.5 | 4 | ||||||||
※Note: If the parameters are beyond the above range, it can be discussed and confirmed with us.
Appearance and installation size
Frequently Asked Questions (FAQ)
What are the primary applications of this current transformer?
This current transformer is designed for indoor use in power systems with a rated voltage of 35 kV and below. It is mainly used for electric energy metering, current measurement, and relay protection within air-insulated switchgear.
Which international standards does this transformer comply with?
It meets multiple standards including IEC61869.1-2007, IEC61869.2-2012, GB311.1-1997, GB 5583-1985, GB/T 22071.1-2008, and JJG 1021-2007.
What are the standard ambient temperature limits for installation?
The transformer operates within an ambient temperature range of -5℃ to +40℃, with the average daily temperature not exceeding 30℃.
What is the maximum altitude for standard operation?
The standard operating altitude for this current transformer should not exceed 1000 meters.
What is the rated insulation level and secondary current?
The rated insulation level is 40.5/95/185kV, and the secondary current can be rated at either 5A or 1A.
Can I customize parameters if my requirements are outside the standard range?
Yes. If your technical parameters are beyond the standard specifications listed in our data sheet, please contact us to discuss and confirm customized solutions.