China Suppliers Factory TVR-Line Three Phase Voltage Regulator 2.5-34.5kV for Indoor/Outdoor Use
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 allowed, it will seriously affect the system and electrical equipment:
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Electric power system: Low voltage affects equipment output and supply reliability. Severe drops can cause voltage collapse, frequency loss, and blackouts.
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Electric equipment: Asynchronous motors suffer reduced torque and increased heat at low voltage, or iron loss and overheating at high voltage.
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Lighting: A 10% voltage drop reduces incandescent light flux by 30%; a 10% increase halves lamp life.
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Consumer Electronics: Affects air conditioning, chargers, and TV signal reception.
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System Losses: Lower operating voltage leads to higher current and significantly larger system 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 within requirements. 27 taps regulation can meet every step 0.75% regulation accuracy.
Case Study (Figure 6): A factory requiring 400V faced drops below 360V due to 120% load capacity in summer. After installing the Farady auto voltage regulator, it adjusted the line voltage from 8038V to 11000V, maintaining 400V (+8V accuracy) with 2% overall stability.
Work Condition
- ➤ Altitude: Below 3000m (customizable)
- ➤ Temperature: -25°C to 65°C
- ➤ Humidity: <90% (at 25°C)
- ➤ Pollution Class: III
- ➤ Rating Voltage: 11/22/33kV or customized
- ➤ Capacity: 500kVA ~ 6300kVA
- ➤ Vector Group: 3-phase 3-wire star/delta
- ➤ Tap Selector: 9/11/13/17/27/32 positions
- ➤ Range: ±10%, -5%~+15%, 0~+20%, 0~+30%
- ➤ Cooling: ONAN
Voltage Regulator Structure
VACUUM TYPE ON LOAD TAP CHANGER
Features a selector switch structure combining diverter and selector functions.
Features a selector switch structure combining diverter and selector functions.
- ✔ Maintenance-free up to 100,000 operations.
- ✔ Exchange diverter switch after 1.2 million operations.
- ✔ Max current up to 600A; Max voltage up to 145kV.
OIL IMMERSED TYPE ON LOAD TAP CHANGER
A typical combined-structure changer applicable in oil-immersed transformers.
A typical combined-structure changer applicable in oil-immersed transformers.
- ✔ Electrical life: 50,000 times; Mechanical life: 500,000 times.
- ✔ Max current up to 400A; Max voltage up to 35kV.
- ✔ Cost-effective compared to vacuum types.
Intelligent Controller
★ High accuracy: 27 taps regulation.
★ Long life: Arcing-avoidance design.
★ Maintenance-free: High IP protection sealing.
★ SCADA Ready: RS232 adapter for automation.
★ Low Loss: Minimized iron and load loss.
★ Economic: Extends equipment life.
FK Function Features
- ◈ User-friendly interface for settings and data browsing.
- ◈ Easy adjustment of voltage, bandwidth, delay, and offset.
- ◈ Measures load voltage, current, power factor, and reactive power.
- ◈ Supports forward/reverse automatic regulation for ring networks.
- ◈ RS232/RS485 interfaces for remote control and telemetry.
Project & Installation
Frequently Asked Questions (FAQ)
1. What is the primary function of the TVR-line voltage regulator?
It is designed to automatically monitor and adjust distribution line voltage, ensuring it stays within a stable range despite line impedance or load fluctuations.
2. How accurate is the voltage regulation?
The system utilizes a 27-tap regulation design, providing a step accuracy of 0.75%, which ensures very fine control over the output voltage.
3. What is the difference between Vacuum and Oil-immersed tap changers?
Vacuum types are maintenance-free for up to 100,000 operations and handle higher currents (600A), while Oil-immersed types are a more economical choice for standard applications up to 400A.
4. Can this regulator be used in remote or automated systems?
Yes, it features an intelligent controller with RS232 and RS485 interfaces, making it fully compatible with SCADA systems for remote monitoring and telemetry.
5. What environmental conditions can the equipment withstand?
It is rated for altitudes up to 3000m and temperatures ranging from -25°C to 65°C, with custom configurations available for extreme environments.
6. How does the regulator improve energy efficiency?
By maintaining optimal operating voltage, it reduces the system current and square-law losses associated with low voltage, thereby extending equipment life and reducing operational costs.