Kingtec Voltage Stabilisers

Index

KINGTEC Stabilisers - The ultimate stabilising target

Applications

Operating principles

General features

Power supply interferences and failures

KINGTEC Stabilisers - The ultimate stabilising target

The wider use of equipment with non linear absorption such as rectifiers, speed variators, drives, switching power supply units, has caused, besides traditional and well known voltage fluctuations, the spreading of a new insidious type of electrical fault: harmonic distortion. This fault "deceives" traditional stabilising systems that, in its presence, read wrong input voltage values. As a consequence a voltage is delivered with an efficient value that differs from the rated one, becoming greater as the harmonic distortion of the mains increases. 

The new line of KINGTEC stabilisers are the best technological and innovative answer to this problem, indicating the ultimate stabilising target. Today electric facilities can be supplied with voltage stabilised to the rated value for which they have been designed even in the presence of strong harmonic distortion.

Applications

Kingtec voltage stabilisers offer a reliable and tested economic solution to inconveniences caused by voltage fluctuation.  To use Kingtec Stabilisers is a real investment because the  elimination of  the inconveniences means a reduction in costs and an increase in productivity.  Very often it is only necessary to avoid a few minutes machine downtime or just one failure to repay the cost of the stabilisers.  Kingtec Stabilisers are particularly suitable for applications that require :

• high reliability.  For example it can be installed in areas with difficult access, subject to critical environment conditions due to cold , high temperatures, humidity, atmospheric discharges.
• capability to compensate wide mains voltage variations, even up to +/- 25%.  This is a typical requirement of equipment installed in areas that are far from the distribution cabin and in fast developing countries.
• high precision of the stabilised voltage.  Ideal condition for calibration and inspection stands, electric furnaces, professional lighting systems.
• stabilising of high power services or with a strong inrush current, such as : motors, air conditioners, compressors, pumps.
• simple and limited maintenance.  Most important where there is difficulty in having quailifed personnel able to make servicing.

Operating principles

Kingtec Stabilisers regulate through a series transformer. A static control circuit drives the variable autotransformer that supplies the required voltage to the series transformer either in phase or phase opposition to bring the mains to the rated value.
The three-phase stabilisers are available in two versions:

T models which regulate on the average of the three phases and are therefore suitable for balanced lines or for a maximum load unbalance between the phases of 50%
Y models that, having three separate control circuits, individually regulate each phase and are therefore suitable for unbalanced lines and load unbalance between phase up to 100%.

SINGLE-PHASE STABILISERS M
THREE-PHASE STABILISERS T
THREE-PHASE STABILISERS Y T = series transformer R = variable atuotransformer C = electronic control circuit M = servomotor

General features

Range
Over 120 standard models with power varying from 1 kVA to 1000 kVA. The models up to 100 kVA are usually in stock. Upon request we can supply stabilisers with the following characteristics:

single-phase voltages: 100-110-115-127-200-240-265 Volts
three-phase voltages: 208-220-230-240-415-440-460-500 Volts
Frequency: 60 Hz;
open frame versions IP 00;
with optional enhancements such as: surge arrestors, electronic voltage relays; "tropicalised" versions, etc.

Accuracy
Kingtec Stabilisers ensure the "true RMS value" of the voltage with an accuracy range that varies according to the model from +/- 0.5% to +/- 1.5%, even where strong harmonic distortions are present on the line.

Fast response
The advanced electronic control circuit ensures a fast response, from 11 to 50 ms/Volt according to the model. A controlled deceleration minimises overshoots.

Overload capacity
A typical characteristic of the Kingtec Stabilisers regulation system. In fact, they can support without damage overloads up to 10 times the rated power for 20 milliseconds, 5 times for 0.5 seconds, and double for 3 seconds.

Efficiency
At full load the range is from 96% for small models to 98% for the larger units.

Unaffected by power factor and load variations

The Kingtec Stabilisers operating principle ensures that the equipment accuracy and regulation speed characteristics remain unaltered under any load conditions, with inductive or capacitive loads.

Unaffected by frequency variations

The servomotor control circuit operates correctly with mains frequency variations up to +/- 5%.

Negligible waveform distortion

The high quality materials and their correct use ensure that harmonic distortion is always less than 0.2% under any working conditions.

Low internal impedance

Installation of Kingtec Stabilisers in already existing systems does not require new calculations for protections since their internal impedance varying from 0.52 to 0.015 OHM does not significantly affect the line impedance.

Operating temperature

Kingtec Stabilisers have been designed to operate correctly with a maximum environment temperature of 40℃under the worst conditions: continuous operation, full load, minimum input voltage value.

Conformity to standards

Kingtec Stabilisers confirm to the requirements of the following standards: Electro Magnetic Compatibility 89/336/EEC and following amendments; Low Voltage Electrical Equipment 73/23/EEC and following amendments.

Power supply interferences and failures

Companies producing electric energy generate the correct voltage. However, failures on the line, atmospheric conditions, continual load variations and disturbances generated by the actual users make it impossible to guarantee every user a steady voltage within the tolerance bandwidth stipulated in the supply contract. 
Very often the tolerance is insufficient for more sensitive facilities. Other times the mains voltage reaches levels that exceed the foreseen rated value by 15,20 or even 25%.
The voltage fluctuations are particularly treacherous interferences since they are not seen and can only be detected by using specific equipment. When such interference are present, the electrical equipment seems to maintain correct operation but disguises serious problems that at times are beyond repair.

Even an ordinary light bulb, if overpowered by 10%, continues to give light, but halves its operating life. The situation becomes much more serious in the case of voltage variations on more complicated equipment. 
a computer may become damaged or make unexpected errors.
a laser cutting machine undergoes changes in the "laser beam mode", resulting in cutting burrs or the shutting off of the beam;
a transmitter gives signal distortion and its components age more quickly;
an electric drive causes undesired changes in the speed of the powered motor and damage to the data storage and power terminals;
an "electromedical" device gives incorrect results, wastes expensive reagents and loses the samples to be analysed.

Contact Information　

Telephone

(852) - 27909298

Electronic mail

General Information :  dynaking@dynaking.com

Sales Department      :  tech@dynaking.com

Service Department  :   techservice@dynaking.com