China Factory Suppliers: TVR-Line Three Phase Line Voltage Regulator 2.5-34.5kV - Reliable Power Solution
The actual voltage from the rated voltage of the circuit size is an important measure of power quality, also is a important guarantee of power supply reliability and voltage quality.
General
Ideally the distribution lines should to be able to keep the whole line of constant voltage, but in actual, the impedance of the distribution line will result in that the voltage of end and terminal is not same (Figure 1).
Since the line voltage can not be kept constant, when the actual voltage levels exceed the normal range of fluctuation of voltage allowed, it will seriously affect the normal use of the system and electrical equipment.
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Electric power system: Low voltage will affect the power supply equipment output, reducing supply reliability, but also affect their own economic power. Voltage drops particularly severe may cause voltage collapse, frequency loss, and blackouts.
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Electric equipment: Voltage quality affects safe and economic operation. For asynchronous motors, low voltage reduces torque and increases slip, raising stator and rotor current which can burn the motor. High voltage causes overheating due to increased iron loss.
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Lighting & Appliances: A 10% voltage drop reduces incandescent light flux by 30%. A 10% increase halves lamp life. Low voltage also impacts air conditioning, chargers, and TV signal reception.
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Power system losses: As voltage decreases, current increases to convey the same power, significantly increasing system square losses.
Work Principle
TVR-line voltage regulator is a special design autotransformer with on-load tap changer. It automatically monitors and smoothly adjusts the output voltage, guaranteeing it stays within requirements. 27 taps regulation can meet every step 0.75% regulation accuracy.
In Figure 6, an utility sample for a factory requiring 400V power shows the line is unstable in summer due to 120% load. Power drops below 360V, rendering equipment unusable. After installing Farady auto voltage regulator, it adjusts the power line voltage from 8038V to 11000V, maintaining stability with 2% accuracy (400V ±8V).
Work Condition
📍 (1) Below 3000 meter (special altitude customized)
🌡️ (2) Work temperature: -25°C to 65°C
💧 (3) Monthly humidity
🏗️ (4) Pollution class: III class
🔌 (5) Rating voltage: 11/22/33kV or customized
🔋 (6) Rating capacity: 500kVA ~ 6300kVA
〰️ (7) Frequency: 50/60Hz
📐 (8) Vector group: 3phase 3 wire star/delta
🔢 (9) Tap selector: 9/11/13/17/27/32 position
❄️ (10) Cooling method: ONAN
📑 (11) PT: 10000/100V 50VA
📑 (12) CT: XXX/1A, 2 meter method
🔌 (13) Third winding rating: 220V
↔️ (14) Range: ±10%, -5%~+15%, 0~+30%, etc.
Voltage Regulator Structure
VACUUM TYPE ON LOAD TAP CHANGER
Combines diverter and selector functions. Mounted to the transformer tank cover. Maximum operating positions up to 23 with a change-over selector.
- ✓ Maintenance-free up to 100,000 operations.
- ✓ Diverter switch insert exchange after 1.2 million operations.
- ✓ Max current 600A, Max voltage 145kV.
OIL IMMERSED TYPE ON LOAD TAP CHANGER
Comprising diverter switch and tap selector. Diverter switch has a separate oil compartment.
- ✓ Electrical life: 50,000 times; Mechanical life: 500,000 times.
- ✓ Max current 400A, Max voltage 35kV.
- ✓ Cost-effective alternative to vacuum types.
Intelligent Controller
🎯 High accuracy: 27 taps regulation.
🛡️ Maintenance-free: High IP protection degree.
🌐 SCADA Ready: RS232 adapter for automation.
💰 Economic: Reduces line losses and extends equipment life.
FK Function Features
🖥️ Friendly user interface for data browsing and settings.
📊 Measurement of load voltage, current, power factor, etc.
🔄 Forward and reverse automatic regulation for ring networks.
📡 RS232/RS485 interfaces for remote control and telemetry.
Project & Installation
Frequently Asked Questions
Q1: What is the primary function of the TVR-line voltage regulator?
It is an autotransformer equipped with an on-load tap changer designed to automatically monitor and adjust output voltage to maintain stability in distribution lines.
Q2: How precise is the voltage adjustment?
The system utilizes 27 taps for regulation, providing a high accuracy of 0.75% per step.
Q3: What are the differences between Vacuum and Oil-Immersed tap changers?
Vacuum types are virtually maintenance-free for up to 100,000 operations and handle higher currents/voltages, while Oil-Immersed types are a more cost-effective solution for standard applications.
Q4: Can this system be integrated into existing SCADA networks?
Yes, the intelligent controller features RS232 and RS485 interfaces and supports multiple communication protocols for remote control and distribution automation.
Q5: What happens if the line voltage is too low for industrial equipment?
Low voltage reduces motor torque, increases current and heat, potentially burning out motors, and significantly reduces the efficiency and lifespan of lighting and other electronics.
Q6: What is the capacity range for these regulators?
Standard ratings range from 500kVA to 6300kVA, with voltage ratings of 11kV, 22kV, and 33kV, which can also be customized.