Current Transformer CT High Voltage 11kv 35kv 66kv 110kv 220kv 330kv Customized

• Customization: Available
• Application: Electronic, Instrument, Position Sensor, Audio, Lighting
• Type: Voltage Transformer
• Model NO.: MK-CT2488
• Phase: Three
• Operation Condition: Outdoor
• Usage: Protection, Measurement
• Winding Form: Multilayer Honeycomb Type
• Insulating Medium: Insulating Gas
• Installation: Active Type
• Magnetic Circuit Structure: Combined Type
• Voltage Transformation Principle: Photoelectric Type
• Transport Package: Wooden Case
• Specification: Customized
• Trademark: Markevina or OEM
• Origin: China
• Production Capacity: 1000000/Year
• Package Size: 100.00cm * 300.00cm * 100.00cm
• Package Gross Weight: 2000.000kg

Product Description

Current Transformer, 11KV  35KV 66KV 110KV 220KV 330KV 
Instrument Transformer for High Voltage Power Supply System 
 
Techinical parameters

NO.	project	unit	parameter
1	Rated short-time power frequency durable withstand voltage (1min effective value)	KV	230
2	Rated lightning impulse withstand voltage (full wave) 1.2/50 μ S) (peak)	KV	550
3	Rated lightning impulse withstand voltage (chopped wave 2-5) μ S) (peak)	KV	633
4	Rated short-time thermal current (effective value)	KA	55-87
5	Rated dynamic stability current (peak)	KA	100-125
6	Local discharge	PC	≤5
7	Rated pressure of SF6 gas (20 ºC)	Mpa	0.4
8	SF6 gas make-up pressure (20 ºC)	Mpa	0.35
9	Creepage distance	Mm/kv	≥25
10	Annual leakage rate of SF6 gas		≤1%
11	Moisture content of SF6 gas	V/V	≤300×10-6
			≤500×10-6
12	Weight of single SF6 gas / total weight of single SF6	kg	7/450

1. Normal working conditions and installation conditions

1. The ambient temperature is - 40 ºC ~ + 50 ºC, and the daily average temperature does not exceed + 35 ºC;
2. The altitude of the installation site shall not exceed 3000m;
3. When the maximum temperature is + 40 ºC, the relative humidity of the air shall not exceed 50%
The relative humidity of water is allowed to exceed 80% at low temperature;
4. There is no serious pollution movement in the air, and there is no sufficient corrosion of metal and fracture in the medium
Bad insulation gas and conductive dust;
5. The installation site shall be free from violent vibration and turbulence, and the installation inclination shall not be greater than 5 °;
6. The installation site is not directly radiated by sunlight, without rain and snow erosion and serious mildew
Bacteria exist.
 

1. Structural features

This type of current transformer adopts SF6 gas insulation structure, which is mainly composed of shell, bushing and base. The shell is located on the top of the product. The primary winding and secondary winding are installed in the shell. The primary winding passes through the middle of the secondary winding and is insulated with SF6 gas. The shell is equipotential with the primary circuit and insulated from the base through the sleeve. The secondary winding is fixed in the shell by insulating parts, and its lead is connected with the secondary wiring terminal in the base through the metal shielding pipe in the sleeve for users to connect the load for measurement or protection. The base is equipped with adsorbent, secondary wiring panel and SF6 pointer density relay.
This product has the following characteristics:
4.1 safe and reliable operation.
4.1. 1. The porcelain bushing is high-strength porcelain, and its failure pressure is 6-7 times of the rated pressure.
4.1. 2. The top of the product is equipped with an explosion-proof disc. When the product pressure reaches 0.8-0.9mpa, the bursting disc will rupture automatically,
There will be no explosion and fire.
4.2. Reliable insulation and current carrying capacity.
4.2. 1. The main insulation is SF6 gas with high insulation and self recovery ability, and the insulation is very reliable.
4.2. 2. The primary winding can withstand large dynamic and thermal stable current.
4.3. The rated pressure of the product is 0.4MPa, the air make-up pressure is 0.4MPa, and the air make-up pressure is 0.4MPa
It is 0.35Mpa, the annual gas leakage rate is within 1%, and maintenance is free within ten years.
4.4 the product adopts the most advanced self sealing valve in the world, which reduces the leakage point, so the product is increased
Reliability of operation.