500KVA O R T E A Three Motors Auto Voltage Stabilizer AVS With Ourdoor IP44 Cabinet

Wenzhou Modern Group is a leading company in the manufacture of Power Quality and Energy Saving Products in China.

Milestones:

• 1979: Founded as a manufacturer of transformer based power products
• 1988: Constant voltage transformer introduced and UL certified
• 1992: Became a strategic partner for GE Healthcare in China
• 1995: Obtained ISO9001 quality system
• 2003: Introduction of the patent variable transformer
• 2005: Became a strategy partner of Emerson Network Power
• 2010: Obtain CE for the voltage stabilizer
• 2013: Obtain CE for voltage optimization unit

Strict Quality Inspection:

Features:

1. Silent design with moving Long life roller carbon brushes, High reliability and low maintenance
2. Unique compact dimension.
3. Digital control.
4. Rich protection functions.
5. Efficiency up to 98%
6. Independent phase voltage regulation. Changeable through LCD touchscreen display
on site.
7. Manual bypass, Automatic bypass (Optional)
8. Remote monitoring by RS485 or RS232 or WIFI, GPRS.

Main components :

Buck/boost transformer

Often referred to as 'booster' transformer, it is a standard dry-type transformer with the secondary winding connected in series to the mains and the primary winding supplied by the voltage regulator.

Voltage regulator

Basically, it is an autotransformer with continuously variable transformer ratio. The voltage intake varies depending on the position of the rolling contacts; therefore the voltage supplied to the booster transformer primary winding also varies. Being the voltage across the regulator contacts (and consequently that on the secondary winding of the booster transformer) either in phase or in opposition to the supply voltage, it is then added or subtracted to the supply voltage, thus compensating its variations.

Auxiliary circuit with a microprocessor

The DSP (Digital Signal Processor) microprocessor-based control circuit (specifically designed for
drives with the totally digitalized signal) compares the output voltage value to the reference one sampling it 2000 times per second.
When an anomaly is detected, the controller drives the voltage regulator gear motor. By doing so, the
regulator rollers change their position thus varying the voltage drawn and supplied to the buck/boost
transformer primary winding. The input voltage variation is therefore automatically compensated.
The control system operates so that the output accuracy is ±0.5%. The microprocessor is fitted with the
soft stop function enabling a precise positioning of the regulator rollers regulation to work smoothly
even in case of strong fluctuation of the input voltage.

Specifications:

HOW TO CHOOSE A VOLTAGE STABILIZER?

What's the difference between Roller carbon brush with the Flat carbon brush?

Comparative of the different of Voltage stabilizer:

How to choose the capacity of the voltage stabilizer:

Principles

The voltage stabilizer and the voltage regulator are chosen according to the current:

1 Continuous working current is smaller than the rated current of the voltage stabilizer or voltage regulator, Better to have a design margin of 20%.

2 The loads start current is smaller than 5 times of rated current of the servo voltage stabilizer with the roller brush and columnar transformer. or 2.5 times the servo voltage stabilizer with a flat brush, 2 times the static voltage stabilizer.

How to choose the capacity of the voltage stabilizer:

Loads Rated current:

Single phase:

Rated current In=Pn/(Vn*cosφ)

Three phase:

Rated current In= Pn/(1.732*Vn*cosφ)

Note:

Pn — Load capacity(kW),

Vn — Rated voltage(V), Tt is Line to Line voltage in three phase system

Cosφ — Power factor.

How to choose the capacity of the voltage stabilizer:

Loads surge current:

Three phase(Motors):

1 Direct start: I(tmax)= In total + In(max)*6

2 Autotransformer start: I(tmax)= In total + In(max)*3

3 Star-Delta start: I(tmax)= In total + In(max)*3

4 Variable Frequency start: I(tmax)= In total + In(max)*2

5 Soft start: I(tmax)= In total + In(max)*3

Note:

I(tmax)— The max start current.

In total — The total rated currents of the loads

In(max)— The max starting current of the motor.

Better Power Quality, More Energy Saving

Wenzhou Modern Group(MODERN) is one of a leading company in designing and manufacturing Power Quality and Energy Saving products in the world.

Wide Power Solutions

Since 1979, MODERN has pioneered improvements in power solutions sectors for Industrial, Commercial, Medical, Broadcast and Telecom applications. Our products range various from Voltage Stabilizers, Voltage Optimizers, Voltage Regulator, Transformers and Reactors to Frequency Converters, UPS, Harmonic Filters, Power Factor Correction and Surge Protectors.

Experienced and Fully Customizable Solutions

All MODERN products are designed and manufactured with the worldwide ISO quality standards. Besides standard production, MODERN can be extremely flexible in developing and manufacturing special tailored specifications thanks to a proficient technology development.

Worldwide Service & Support

MODERN is well established in the international markets. Thanks to strategically positioned offices and distributors, MODERN’s products are installed and working in over 50 countries and regions around the world.

MODERN is committed to provide complete innovative and cost-effective power quality and energy saving solutions coupled with excellent customer service for all kinds of critical applications.