Oip Type of 220kv Transformer Bushings Manufacturer

• Application: High-voltage
• Material: Porcelain
• Structure: Bushing Insulator
• Usage: High Voltage Power Transmission
• Connection Method: Trough Type
• Size of Bearing Capacity: 3150n
• Model NO.: BRDLW
• Certification: ISO9001
• Color: Brown
• Brand: Chinsun
• Transport Package: Plywood Crates
• Specification: BRDWL-220/1000
• Trademark: ChinSun
• Origin: China
• HS Code: 85479090
• Production Capacity: 5000

Product Description

OIP type of 220 kV transformer bushings technology specifications:

Maximum operating voltage (50/60Hz): 220 kV
One-minute power frequency withstand voltage (dry): 505 kV
Rated current: 1000 A
Partial discharge level at 252 kV: ≤10 pC
Tanδ of bushings: ≤0.5%
Lightning impulse withstand voltage (dry): 1050 kV
Creepage distance: 8595 mm
Ambient temperature range: -40°C to +45°C
Altitude above mean sea level: ≤1000 m
Installation angle range: 0-30°
Cantilever test load: 2000 N
Type of conductor: Drawn lead
Internal insulation: OIP
External insulation/Colour: Porcelain / Brown
Compliance with standard: IEC 60137

 

Key technical parameters-IEC
Standard	IEC 60137-2017
Highest voltage for equipment  Um	kV	72.5	100	123	145	170	245	300	362	420	550
Rated frequency	Hz	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60
Dry power frequency withstand voltage 1minute	kV	155	205	255	305	355	505	505	560	750	870
Lightning impulse(BIL)	kV	325	450	550	650	750	1050	1050	1175	1150	1800
Switching impulse(SIL)	kV	-	-	-	-	-	850	850	950	1175	1300
Maximum Rated Current	A	4000	4000	4000	4000	4000	3150	3150	3150	3150	3150
Temperature range	ºC	Down to -60°C up to +55°C available on request
Key technical parameters-IEEE
Standard	IEEE C57.19.01-2017
Highest voltage for equipment  Um	kV	69	115	138	161	230	345	500
Rated frequency	Hz	50/60	50/60	50/60	50/60	50/60	50/60	50/60
Dry power frequency withstand voltage 1minute	kV	160	260	310	365	425	520	750
Lightning impulse(BIL)	kV	350	550	650	750	900	1175	1675
Switching impulse(SIL)	kV	-	-	-	-	-	825	1175
Maximum Rated Current	A	4000	4000	4000	4000	3150	3150	3150
Temperature range	ºC	Down to -60°C up to +55°C available on request

The ChinSun OIP transformer bushing is composed of components such as terminal blocks, oil conservators (conservators), upper/lower porcelain bushings, flanges, and equalizing shields. The main insulation of the OIP transformer bushing is a cable paper wound capacitor core, with a metal foil laid in the middle as the main insulation capacitor screen. Install the capacitor core into the upper and lower porcelain bushings connected through flanges, install an oil conservator at the head, and install a lower-pressure equalizing ball at the tail. A mechanically fastened fully sealed structure is used, and transformer oil is injected under vacuum to form a complete bushing. Ensure that the internal insulation is not corroded by the external atmosphere and ensure that the bushing can operate reliably for a long time. The bushing size can be specially designed according to user requirements.
Main structure description:
1. Internal insulation main body: It adopts a wide-width paper roll formed by winding, with a compact structure that is not easy to slip off, maximizing the corona voltage and no partial discharge during operation.
2. External insulator: High-strength porcelain jacket insulation, porcelain jacket color is brown.
3. Oil conservator:
1) The oil conservator (conservator) at the head of the bushing is equipped with an oil level gauge, which can be used to detect the bushing oil level during operation. There are pointer-type and round glass-type oil level gauges.
2)Before installing the bushing, the oil level inside the bushing should be checked vertically. The oil level inside the bushing is displayed on the oil level gauge on the conservator (conservator), with "MAX" and "MIN" markings on the gauge, indicating the highest and lowest oil levels of the bushing, respectively. The normal oil level during use should be within the middle range. The oil level may vary slightly due to temperature changes. If the oil level is lower than the specified height, the oil should be replenished through the oil filling plug on the conservator. In principle, the insulation oil injected into the bushing should be the same grade as the insulation oil of the bushing body and meet the requirements of the bushing manufacturer; If the oil level is too high, an appropriate amount of transformer oil can be discharged from the oil extraction valve on the bushing flange. The usage method is detailed in the Oil Valve User Manual.