TVI Series SF6 Inductive Voltage Transformer
Key attributes
| Brand | Rockwell |
| Model NO. | TVI Series SF6 Inductive Voltage Transformer |
| Rated voltage | 420kV |
| Series | TVI Series |
Product descriptions from the supplier
Overview
TVI (Inductive Voltage Transformer) is the result of practical experience with SF6 instrument transformers and inductive voltage transformers for PASS and GIS. This SF6 gas insulated inductive type of voltage transformer is built for revenue metering and protection in high voltage networks. It is designed for the most varied conditions, from polar to desert climates. The use of a composite insulator and pressure relief device ensures greater safety and a higher performance in very heavy polluted environments.
Advantages
The TVI, thanks to the use of SF6 gas and of a composite insulator, offers several advantages:
● highly reliable equipment
● explosion proof design
● maintenance free
● dielectric quality not depending on long treatments
● negligible level of partial discharge
● dielectric mean not subjected to ageing
● wide safety margin against saturation and ferro-resonance
● high seismic withstand capability
● suitable for applications in mobile substations
● higher performance in very heavy polluted environments
● available with a gas insulated disconnector for increased
Flexibility during operation
● Suitable for both metering and protection
● Magnetic cores made of laminated steel with oriented grain and a high level of permeability
● Windings made of electrolytic copper
● Primary winding connected directly to the high voltage side while the secondary winding supplies the low voltage panels
● Insulation system designed to guarantee a life cycle of 30 years. Declared maximum gas leakage: less than 0.1 % per year
● Safety margin for normal wind loads, stress from conductors and seismic forces
● Construction in conformity with national pressure standards
● Installed on a metal support with four eyebolts for lifting.
Technology parameters
Related Products
Related Knowledges
-
Faults and Handling of Single-phase Grounding in 10kV Distribution LinesCharacteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in01/30/2026 -
Neutral point grounding operation mode for 110kV～220kV power grid transformersThe arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi01/29/2026 -
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr01/29/2026 -
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I01/29/2026 -
Understanding Transformer Neutral GroundingI. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit01/29/2026 -
What’s the Difference Between Rectifier Transformers and Power Transformers?What is a Rectifier Transformer?"Power conversion" is a general term encompassing rectification, inversion, and frequency conversion, with rectification being the most widely used among them. Rectifier equipment converts input AC power into DC output through rectification and filtering. A rectifier transformer serves as the power supply transformer for such rectifier equipment. In industrial applications, most DC power supplies are obtained by combining a rectifier transformer with rectifier equ01/29/2026
Related Solutions
-
Complete Solution for Central Air Conditioning System Retrofit in Mexican Office Buildings (American Standard Distribution Transformer)Ⅰ. Project Background & Pain Point AnalysisThe Mexican office building utilizes a 15HP commercial central air conditioning system originally powered by a single-phase 220V grid. Due to the lack of 380V three-phase driving voltage, the compressor startup current exceeds overload limits (measured at 3.2× rated current), causing refrigeration efficiency to plummet to 40%, accompanied by: Motor winding temperature rise exceeding standards (ΔT > 65°C), reducing insu05/19/2025 -
NEMA-Compliant Distribution Transformer Solution: Specialized Optimization for New Energy ManufacturingⅠ. Project ChallengesA lithium battery production line in Quebec required conversion of 575V three-phase power from the Canadian industrial grid to 220V single-phase power. The existing distribution transformer system faced: Harmonic interface: Voltage distortion affected precision control systems, reducing yield rates by 18% Energy efficiency loss: Conventional distribution transformers exhibited 0.8 power factor with notable reactive losses Environmental adaptability: Humidity fluctuations in05/20/2025 -
Localized Production and Strategic Collaboration Implementation Plan for Oil-Immersed Distribution Transformers in AfricaWenzhou Rockwell Transformer Co., Ltd. distributes power transformers to multiple African countries including Tanzania, Zambia, Rwanda, Ethiopia, Togo, Cameroon, and Malawi. With in-depth knowledge of local policies, we propose a collaborative plan to establish a manufacturing facility for oil-immersed distribution transformers and seek partnerships with qualified African entities.Ⅰ.Localized Production Strategy1. Market-Adaptive Capacity AllocationAlign production capacity with regional market04/23/2025
