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China LZZB9-35D Indoor Epoxy Resin Casting Current Transformer - Suppliers and Factory for Quality Solutions
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 is the primary application of this current transformer?
It is designed for indoor installation in power systems with a rated frequency of 50 or 60 Hz and a rated voltage of 35 kV and below. It is mainly used for electric energy metering, current measurement, and relay protection.
What standards does this equipment comply with?
The current transformer complies with international and national standards, including IEC61869.1, IEC61869.2, GB311.1, GB 5583, GB/T 22071.1, and JJG 1021.
What are the ambient temperature limits for installation?
The transformer is suitable for indoor environments with a maximum temperature of +40℃ and a minimum temperature of -5℃, provided the average daily temperature does not exceed 30℃.
What is the rated insulation level of this current transformer?
The rated insulation level for this equipment is 40.5/95/185kV.
Can I customize the parameters if they are outside the standard table?
Yes. If your required primary current, accuracy class, or other parameters fall outside the specified standard range, please contact us directly to discuss and confirm custom configurations.