S D Engineering

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Panel Spare

Features & Benefits

• Customized as per your requirements and specifications
• Natural air-cooled
• Thermal sensing and shutdown
• Designed for long service life
• Charging current selection available on request 

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An 11kV Voltage Transformer (VT) is an electrical device designed to convert high voltage levels (11,000 volts) to lower, more manageable levels for measurement, protection, and control purposes in electrical power systems. These transformers are crucial components in substations and power distribution networks, enabling accurate voltage monitoring and ensuring the safe operation of the power system. Here is a detailed description of an 11kV Voltage Transformer:

1. Purpose and Application

• Voltage Measurement: Provides a scaled-down replica of the high voltage, making it safe and easy to measure with standard instruments.
• Protection: Feeds accurate voltage signals to protective relays and systems to detect faults and initiate protective actions.
• Control: Supplies voltage information to control systems for effective monitoring and regulation of the power network.
• Insulation Coordination: Ensures proper insulation levels to handle the 11kV system voltage safely.

2. Design and Construction

• Core and Windings: Constructed with a magnetic core and primary and secondary windings. The primary winding connects to the high voltage side (11kV), and the secondary winding provides a proportionally lower voltage output.
• Insulation: High-quality insulation materials are used to withstand the high voltage and provide long-term reliability. This includes insulation oil or gas (SF6) and solid insulation materials.
• Enclosure: Enclosed in a robust, weatherproof casing to protect against environmental factors, mechanical damage, and ensure safety.
• Terminals: Equipped with high-voltage bushings for the primary connections and low-voltage terminals for the secondary output.
• Accuracy Class: Designed to meet specific accuracy classes (e.g., 0.2, 0.5) for precise voltage measurement and protection requirements.

3. Technical Specifications

• Primary Voltage: 11,000 volts (11kV).
• Secondary Voltage: Typically 110V or 100V, depending on the application and standard practice.
• Rated Burden: The load that the transformer can supply while maintaining its accuracy, usually specified in VA (volt-amperes).
• Frequency: Generally designed for standard power system frequencies, such as 50Hz or 60Hz.
• Insulation Level: Specified by the Basic Insulation Level (BIL) to withstand high-voltage surges and lightning strikes.
• Temperature Rating: Designed to operate within specified temperature ranges, ensuring reliable performance under varying environmental conditions.

4. Features and Benefits

• High Accuracy: Ensures precise voltage measurement and reliable operation of protection systems.
• Robust Construction: Durable and weatherproof design for long-lasting performance in outdoor and indoor installations.
• Safety: Provides electrical isolation between high-voltage circuits and measurement/control equipment, enhancing safety.
• Reliability: Built to withstand harsh electrical and environmental conditions, ensuring dependable operation.
• Ease of Installation: Designed for straightforward installation and connection in various types of substations and power distribution setups.

We “S D Engineering” are a Wholesaler, Retailer and Service Provider of  VCB Spare Parts, Rotary Switch, Testing Services, Power Pack, Servo Stabilizer, Gic Timer, etc. We direct all our activities to cater the expectations of customers by providing them with excellent quality products as per their gratification. Moreover, we follow moral business policies and crystal pure transparency in all our transactions to keep healthy relations with the customers.

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