SF6 Outdoor 220kV Gas Insulation Voltage Transformer (PT)

Specifications 1.Outdoor 220kV Oil-immersed Voltage Transformer

2. ISO Certificate

3. IEC 60044-1 Standard

Purpose: It is outdoor,single phase and Gas insulation inductive Voltage transformer,whice is used for metering and relay protection of 220kV ,50 or 60Hz system.   Standards: IEC Standard: IEC60044-2 «Inductive Voltage Transformer» National Standard : GB1207  «Voltage Transformer» GB311.1 «Insulation co-ordination for high voltage transmission  and distribution  equipment»   Service condition: Ambient temperature: −30~+40°c (special requirement above -40°c) Altitude: less than 1000m Environment pollution level: II III IV   System condition: System Rated Voltage: 220kV System Highest Voltage: 252kV System Rated frequency: 50Hz or 60Hz System neutral earthing method: effectively earthed   Structure feature: 1.The product adopts case-type structure. Its central part adopts Silicone Rubber Composite Insulating  Bush or High Strength Porcelain Bush and top part is settled with primary Terminals.   2.Case body is equipped with SF6 Density Controller which has a function of temperature compensation and a group of junctions for providing alarm signal.   3.Case body lateral parts are installed pressure relief devices with a pressure relief of 1.0Mpa and advantages of no oil, no risk of explosion and no maintenance.   4.The equipment body is placed in the case. The layer insulation is high strength composite insulation of — Polyester Film and gas SF6, Gas SF6 has a reliable insulation performance, no worry of aging and function of insulation restoration.   5.Case body has been plastic spray treated. All parts, such as stainless bolts, name plate are rust-free all the time.   6.The primary connection adopted Aluminum Alloy can support ≥ 3000N static testing load.   7.Seal Rings adopted material of Fluorinated Rubber is suitable for areas of great temperature changes and harsh environment temperature, with annual leakage rate < 0.5%.   8.It makes the product capacitive under a certain voltage to adopt higher saturation flux density Magnetic Material, advanced technology and excellent insulation design.   Technical Data:       

Rated voltage	220/√3kV
Highest voltage for equipment	252/√3kV
Rated frequency	50 or 60HZ
Rated transformation ratio	2200/√3/0.1√3/0.1√3/0.1kV:220/√3/0.1√3/0.1kV
Accuracy and rated output	Secondary terminal marking		1a-1n		2a-2n		da-dn
	Accuracy		0.2	0.5	0.5	3P	3P
	VA Rated output		100		150		300
			100			200
			150
				200
Thermal limiting output	2000VA
Rated voltage factor	1.2 times continuous: 1.5 times 30s
Partial discharge.under 1.2Um/√3kV	≤5pC
SF6 Rated gas pressure (20°C)	0.5Mpa
SF6 Gas-supply pressure (20°C)	0.4Mpa
SF6 Annual leakage ratio	≤0.5%
External insulation creepage distance(mm)	6300mm:7812mm
Power frequency withstand voltage on primary windings	460kV r ms
Rated lightning impulse withstand voltage	1050kV peak
Chopped lightning impulse withstand voltage	1208kV peak
SF6 Oil weight/Product weight	12.5/630kg

            

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