Oil Cooled Type – Industrial Model

                  NUTECH– SERVO CONTROLLED VOLTAGE STABILIZER

Oil Cooled Type – Industrial Model

30kVA – 1000kVA

(3-phase Input, 3-phase Output)

 NUTECH ENGINEERS & POWER SYSTEMS PVT LTD., is a professionally managed, technologically sound company with an enviable track record of over 30 years of experience in providing advance power solutions for safe & managed power. We at NUTECH have been providing innovative & total power solutions with contemporary technology, superior performance, quality and reliability for a broad spectrum of applications, with a strong indigenous Research & Development base.

NUTECH through its existing range of 30 kVA – 1000 kVA, 3-phase Input, 3-phase Output SERVO CONTROLLED VOLTAGE STABILIZER, Oil-Cooled Type (Variac’s & Buck-Boost Transformers both are fully immersed in Transformer Oil), Industrial Model is committed to the highest standards of quality and customer satisfaction.

Working of Servo Controlled Voltage Stabilizer

The unstable Voltage means Voltage fluctuation range 150 to 270 Volts AC in the power supply can cause major breakdown and damages of sensitive electronic equipment such as Air-Conditioning, Appliance, CNC Machines, Cold Storage Units, Food Processing Equipment, CT Scan, MRI Machines & Medical Equipment and in Hospitals, Manufacturing Plant & Industry, Mall, Commercial Complex, Institutions etc., So the Servo Controlled Voltage Stabilizer corrects the Voltage fluctuations and gives the perfect & stable Output Voltage before it damages these equipments.

The Construction of the Oil-Cooled type Servo Controlled Voltage Stabilizer is Variac’s & Buck-Boost Transformers are fully immersed in Transformer Oil with IS 9815 -1994 standards. The Transformer Oil with specific characteristics is made to circulate throughout the Servo Stabilizer by using the best Capillary Tube Systems. Our NUTECH Servo Controlled Voltage Stabilizer are preferably built with ultimate customization for indoor and outdoor applications.

The Voltage from Electricity board or Input source of the Servo Controlled Voltage Stabilizer is sensed continuously by sensing circuits and gives feedback to the Control Circuits which consists of the latest Micro-Controller. The Input Voltage from the Mains is compared continuously by the Micro-Controller with its reference value and triggers to drive the AC Stepper Synchronous Motor during the Voltage fluctuations at the Input. The Shaft of the AC Stepper Synchronous Motor connected with the Auto Transformer (Variac / Dimmer) using Carbon brushes rotates either clock wise or anti-clock wise direction to increase or decrease the number of winding. The Output of the Auto Transformer (Variac / Dimmer) is connected to the Primary of Buck-Boost Transformer which finally increases or decreases the Voltage levels and the induced Voltage across its Secondary also changes. The AC Stepper Synchronous Motor drives in such a way that proper Voltage is applied across the Buck-Boost Primary so that the Output Voltage is set to desired Output Voltage of Servo Stabilizer. This process takes place continuously so as to correct Input Voltages

NUTECH front panel of the Servo Controlled Voltage Stabilizer is equipped with back-light Alpha-Numeric LCD Display indicating the parameters of Input Voltage, Output Voltage, Frequency, Output Current and indications for Input Voltage High Cut-Off, Input Voltage Low Cut-Off, Output ON and Audible Alarm provided for all Fault Trip conditions.

TECHNICAL SPECIFICATION

SERVO CONTROLLED VOLTAGE STABILIZER

(3-phase Input, 3-phase Output) Oil-Cooled Type

Output Power Rating

at 0.8 P.F.

 kVA 30 45 60 75 100 120 150 200 250 300 400 500

Dimension (L x W x H)

 

(Dimensions can be customized according

to site conditions)

 mm 1300 x 700 x 1200 1400 x 800 x 1300 1750 x 1200 x 1450 1900 x 1400 x 1600
Input Voltage & Phase AC

NORMAL RANGE:

 

PHASE TO NEUTRAL 170 – 270 V AC

PHASE TO PHASE 295 – 465 V AC, 3-phase, 4-wire

 

EXTENDED RANGE:

 

PHASE TO NEUTRAL 145 – 270 V AC

PHASE TO PHASE 250 – 465 V AC, 3-phase, 4-wire
Input Frequency Hz 47 – 53 Hz
Output Voltage & Phase AC 400V / 415 V AC ( ± 1%), 3-phase (Output Settable)
Output Voltage Adjustment AC ± 20 V AC
Output Regulation ± 1%
Vector Group Star / Star , 3 Phase + Neutral
Type Un-balanced Type
Nature of Cooling

Air-Cooled

(Variac’s & Buck-Boost Transformers are fully immersed in Transformer Oil)
Output Waveform True Reproduction of Input
Voltage Correction Rate 35 Volts / Sec.
Efficiency 98.5%
Load Protection Over Voltage, Under Voltage, Over load, Low & High Voltage Cut-Off,  Single Phase prevention,  Manual and Auto Mode, Time delay options in Auto Mode,  Input over Load protections by means of Contactors in the Output
Controls & Drives Microprocessor controlled technology for driving the Synchronous AC Stepper Motor
Metering ALPHA-NUMERIC LCD DISPLAY Input Voltage, Output Voltage, Frequency Output Current
Indications Input Voltage High Cut-Off, Input Voltage Low Cut-Off, Output ON, Audible Alarm provided for all Fault Trip conditions.
Construction

Variable Auto Transformer (Variac) + Buck Boost Transformer + Rugged AC Step Synchronous Motor  (As per IS :  9815-1994)

(Variac’s & Buck-Boost Transformers are fully immersed in Transformer Oil)
Manuel Bypass  Optional
Integrated Automatic Phase Sequence Corrector (R,Y,B) Optional
Ambient Temperature 0 – 55 Degree C
Enclosure Complies IP32