SF6 Gas Insulated Current Transformer-Environmentally Friendly Gas Alternative-High Voltage Current Transformer-Power System Protection Equipment

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SF6 Gas Insulated Current Transformer-Environmentally Friendly Gas Alternative-High Voltage Current Transformer-Power System Protection Equipment

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$251,710.00

Stock: In Stock
Model: LVQBT-500

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Type SF6 CT

LVQBT-220

LVQBT-500

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This product is customized according to User Requirement , the above price is for reference, please contact us.

Normal Service Conditon

Altitude: ≤1000m

Humidity monthly: 95%

Wind: ≤34m/s (corresponding to wind pressure of 700Pa)

Pollution class: Ⅲ class (25mm/kV)

Ambient air temperature: -35°C~40°C, temperature difference daily is not more than 30°C.

Max. temperature difference daily:30K

Earthquake intensity: 8 degree

Max. radiance from sun:1000W/m²

Note: When product is used under the condition out of above range, user and manufacturer shall consult to confirm.

Main Technical Data

Table 1

Item	LVQB一110W2	LVQB一220W2	LVQB-330W2	LVQB-330W2
Hightest voltage of equipment	126kV	252kV	363kV	363kV
Rated frequency	50Hz	50Hz	50Hz	50Hz
Rated primary current	200-2500A	300-3200A	300-3200A	5000A
Rated secondary current	1A or 5A	1A or 5A	1A or 5A	1A
Rated output	30-50VA	30-60VA	30-60VA	30-60VA
No. of accuracy classes	one is 0.5(0.2)class,another three are P class	one is 0.5(0.2)class,another four(five) are P class	one is 0.5(0.2)class,another four(five) are P class	four is 0-2S class,three are 5P class,two are TPY
Rated short-time withstand current and duration	40kA/3s	50kA/3s	50kA/3s	63kA/3s
Rated peak withstand current(peak)	100kA	125kA	125kA	160kA
Rated short-time power frequency withstand voltage(rms)	230kV	460kV	510kV	460(510)kV
Rated lightning impulse withstand voltage(peak)	550kV	1050kV	1175kV	1175kV
Rated switching impulse withstand voltage(peak)	-----	-----	950kV	950kV
Radio interference level	Less than 500uV at 80kV	Less than 500uV at 160kV	Less than 500uV at 230kV	Less than 500uV at 230kV
Partial discharge leve	Less than 5pC at 87kV Less than 10pC at 126kV	Less than 5pC at 175kV Less than 10pC at 252kV	Less than 5pC at 251kV Less than 10pC at 363kV	=B2:F15 5pC at 251kV Less than 10pC at 550kV

Table 2

Item	LVQBT-220	LVQBT-330	LVQBT-500
Hightest voltage of equipment	252kV	363kV	550kV
Rated frequency	1000、1200、1500、2000、3000A	1000、1200、1500、2000、3000A	1250、1500、2000、3000、4000A
Rated primary current	1A	1A	1A
Rated secondary current	50Hz	50Hz	50Hz
Rated output	0.5(0.2)class：40VA FS5； 5P class：40-50VA ALF=20； TPY class：10VA Kssc=15	0.5(0.2)class：40VA FS5； 5P class：40-50VA ALF=20； TPY class：10VA Kssc=15	0.5(0.2)class：50VA FS5； 5P class：50VA ALF=20； TPY class：15VA Kssc=15
No. of accuracy classes	One is 0.5 (0.2) class,two are 5P class,two are TPY class. (see table 3)	One is 0.5 (0.2) class，two are 5P class, two are TPY class. (see table 3)	One is 0.5 (0.2) class,another one are 5P class,four are TPY class. (see table 3)
Rated short-time withstand current and duration	50kA~3s	50kA~3s	63kA/3s
Rated peak withstand current (peak)	125kA	125kA	160kA
Rated short-time power frequency withstand voltage (rms)	460kV	510kV	740kV
Rated lightning impulse withstand voltage(peak)	1050kV	1175kV	1675kV
Lightning chopped wave impulse withstand voltage(peak)	1175kV	1352kV	1930kV
Rated switching impulse withstand voltage(peak)	-----	950kV	1250kV
Radio interference level	Lessthan 500uV at 160kV	Less than 500uV at 230kV	Less than 500uV at 350kV
Partial discharge leve	Less than 5pC at 1 75kV Less than 1 OpC at 252kV	Less than 5pC at 251kV Less than 10pC at 363kV	Less than 5pC at 380kV Less than 10pC at 550kV

Table 3

LVQBT-220W2 LVQBT-330W2	LVQBT-500W2
Error guarantee condition of TPY class Times of symmetrical short circuit cu rrent current Kssc=15／Kssc=20	Error guarantee condition of TPY class Times of symmetrical short ci rcuit Kssc=20
Time constant of primary system Tp=60ms	Time constant of primary system Tp=100ms
100％ offset of D.C. component	100％ offset of D.C. component
Working cycle of TPY class C--O--C--O t'=100ms tfr=500ms t''=100ms t''al=40ms	Working cycle of TPY class C--O--C--O t'=100ms tfr=300ms t''=100ms t"al=40ms

Structure

Overall structure of 110~500kV SF6 gas current transformer supplied by our company is up-sidedown type, consisting of body, bushing and frame.

●The body is placed at top of the product. The transformer body (primary and secondary windings) are placed inside of enclosure. Primary windings run through geometric center of secondary windings. Secondary windings are installed in earthed secondary windings screen. The enclosure of body with high potential is placed on the bushing.SF6 gas is used between primary and secondary windings as insulation medium. Leading-out wire of secondary windings is brought out through terminal of secondary terminal board in the frame.

●The bushing is made of porcelain or silicon rubber compound hollow with high-strength and may bear high pressure without damage.

●SF6 gas densometer is placed in frame and indicates internal gas pressure and refilling alarm.

Features of Performance

5.1 Excellent performance

The series product has advanced technology, comply with GB1208 & IEC60044-1“Current Transformer”,GB16847 & IEC60044-6“Technical Requirements of Protective Current Transformer for Transient Performance”

5.2 Large application range and high accuracy

●Primary current is 200~4000A, while secondary current is 5A or 1A.

●Accuracy class is 0.5, 0.5S, 0.2, 0.2S, 10P, 5P, TPY.

●Secondary windings may be combined freely to meet various requirements from users.

5.3 Reliable insulation and current-carry ability

●Electric field is distributed evenly and insulating medium is SF6 gas, Insulating performances can meet fully insulation coordination standard.

●Primary windings are short and have large cross surface, and may bear large working current and short-time & peak withstand current (peak withstand current of 80~160kA, short-time withstand current of 40~63kA for 3s).

5.4 Perfect service reliability

●High strength porcelain bushing has 6~7 times of rupture pressure which is that of product rated pressure(we also provide silicon rubber compound insulating hollow).

●Because SF6 gas can be compressed, even if internal fault is occurred, the pressure increases slowly. At top of the product, there is a pressure-relief device. When internal pressure increases to 0.70~1.0MPa, the rupture disk will burst and there will not lead any explosion and fire.

●Capacitive cone solid insulation is not applied on the product. So there is no leakage current of solid insulation and insulation deterioration due to loss of medium.

5.5 Minimum maintenance, lower leakage rate of SF6 gas

The product adopts a whole-sealed structure, using new type SF6 gas densometer, self-sealing valve adapter. Some of SF6 gas tubing systems are removed, which ensures a lower leakage of SF6 gas. The product is maintenance-free for 10 years.

5.6 Good anti-seismic performance

The anti-earthquake strength is 8 degree with min. dynamic safety coefficient of 2.6.

Please give clear indication when ordering

1. Type, rated voltage, rated frequenly, rated primary, secondary current.

2. Current ratio, accuracy class and quantity, rated output capacity.

3. Bushing material, pollution class.

Quality Assurance Period (QAP) Explanation

1.   The Quality Assurance Period (QAP) is an important aspect of our commitment to ensuring the quality and reliability of our products. We understand that customers rely on our goods to function properly and meet their expectations. To demonstrate our confidence in our offerings, we provide a warranty period during which we take responsibility for any quality issues that may arise.
2.   The length of the warranty period varies depending on the type of product. Generally, for consumable components subject to wear and tear, such as abrasion parts, the warranty period is three months. For smaller components, the warranty period is typically extended to six months. As for major equipment and machinery, we offer a one-year warranty period.
3.   We also recognize that each customer's requirements may differ, and we are open to negotiation regarding the warranty period. If the buyer requests a specific warranty duration that differs from our standard policy, we are willing to discuss and accommodate their needs accordingly.
4.   During the warranty period, we take full responsibility for any quality-related issues that arise. If a product is found to be defective or malfunctions due to manufacturing or material faults, we are committed to providing a resolution. This includes either replacing the faulty component or conducting necessary repairs to restore the product to its intended functionality. Our aim is to minimize any inconvenience caused to our customers and ensure their satisfaction.
5.   It is important to note that the warranty does not cover damages resulting from improper use, mishandling, or normal wear and tear. Additionally, if any modifications or repairs are carried out by unauthorized personnel during the warranty period, the warranty may become void.
6.   At our company, customer satisfaction is our top priority. We strive to provide high-quality products that meet and exceed expectations. The Quality Assurance Period serves as a testament to our commitment to delivering reliable solutions and ensuring that our customers have peace of mind when choosing our products.

Transportation:

1.   We offer various trade methods, including EXW, FOB, CIF, DDU, DDP, etc., allowing customers to choose the most suitable option based on their requirements.
2.   We consider the proximity to the factory where the goods are located when selecting the appropriate port of departure.
Customers can provide the destination port where the consignee is located or choose a designated port for delivery.
3.   Our transportation methods encompass a wide range of options, including waterway transportation, air transportation, and courier services such as DHL, FedEx, EMS, UPS, TNT, etc.
For waterway transportation, we work with reputable shipping companies such as APL, CMA, CNC, COSCO, EMC, EVERGREEN, HMM, KMTC, MCC, MSC, MSK, ONE, SITC, YML, etc.
Air transportation is available through airlines such as (Air China): CA; (China Southern Airlines): CZ; (China Eastern Airlines): MU; (Garuda Indonesia): GA; (Cathay Pacific Airways): CX; (Cathay Dragon): KA; (Korean Air): (Japan Airlines): JL; (Singapore Airlines): SQ; (Thai Airways International): TG, and more.
4.   The transportation time will vary depending on the destination and the chosen transportation method. We will communicate and confirm the estimated time of arrival with the customer prior to shipping.
5.   Shipping costs are influenced by factors such as transportation method, weight, size, and destination. We provide shipping cost estimation services to assist customers in budgeting.
6.   Once the goods are shipped, we offer order tracking services to provide customers with detailed information about the whereabouts of their shipment. Additionally, based on the selected trade method, we can arrange cargo insurance to provide compensation in the event of loss or damage during transportation.
7.   The specific transportation arrangements mentioned above will be coordinated by dedicated personnel, taking into account the actual situation and policies. We strive to tailor the optimal and most cost-effective shipping plan based on the information provided by the customer.

Please note that we are committed to ensuring the smooth transportation of goods and will work closely with customers to address any specific requirements or concerns they may have regarding transportation.

Tags: Power System , Switchyard Equipment , Current Transformer