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Power System Division

AC VOLTAGE STABILIZERS

DESCRIPTION

Servo - Controlled Automatic AC Voltage Stabilizers of 'AE' make are of 'Electro - Mechanical (EMS) type. The purpose of voltage stabilizer is to receive a fluctuating AC voltage of large amplitude & deliver an almost constant voltage, which remains within a very narrow band (± 1%) of the nominal voltage - quality of the AC voltage remains unchanged. The voltage variations, which have become a common phenomenon in current power supply system, cause havoc in modern complicated & sophisticated equipments. The voltage stabilizers are meant to take care of this problem & protect the equipments. They ensure longer life of the equipments & also drastically cut down electricity consumption of equipments leading to continuous reduction in electricity bills. Thus, they play an important role in energy conservation which is need of the day.


The EMS type AC voltage stabilizer basically comprises of the following -
 • 
Dimmerstat (Continuously variable voltage auto transformer).
Buck - Boost Transformer (Optional upto 5kVA 1Ph / 15kVA 3Ph).
AC Step-synchronous motor.
Solid state electronic control circuit.
Two switching triacs.
MOVs for surge suppression.



AUTOMATIC VOLTAGE STABILIZERS


DESCRIPTION

The stabilizer consists of a multiple tap auto transformer and solid state control circuit This maintains the output village within ± 12% of nominal voltage for large variations in input voltageI. These can be used for Air conditioners, refrigerators, lights loads etc.


FEATURES
  •   

Tripping of output village during under voltage and overvoltage conditions.

Provision of time delay after startup, under voltage cut of and over voltages cut of conditions.

In case time delay is not required, then the stabiliser can be switched on by pressing the instant Start push button provided on the front side.

Compact and light weight.
Provision of status LED's for input ON, input On equal voltage (low) and input voltage
(High) on the front side.



CURRENT INJECTION TEST UNIT
DIMMERSTAT CONTINUOUSLY VARIABLE VOLTAGE AUTO-TRANSFORMER

DESCRIPTION

Dimmerstat' is registered trade mark for AE make continuously variable voltage auto-transformer. It is the most effective device for stepless, breakless & continuous control of AC voltage & therefore for various parameters, dependent on AC voltage.

The basic Dimmerstat is meant for operation from a nominal input voltage of 240V 1ph AC & can give output voltage anywhere between 0 to 240V or 0 to 270V AC by simple transformer action. Three such Dimmerstats connected electrically in star and mechanically in tandem, become suitable for operation from a nominal input voltage of 415V 3Ph AC and can give output anywhere between 0 to 415V or 0 to 470V.
FEATURES
  •   Simple, rugged construction.
Coils made from high grade CRGO Silicon Steel & 99.9% pure copper.
Output voltage variation is smooth, continuous, breakless & linearly proportional to angular rotation.
High efficiency.
Negligible waveform & power factor distortion.
Excellent short time overload capacity.
Remote operation possible by motorization.
Wide range of current ratings.
High quality carbon brush used for current collection.


 

ENERGY SAVERS

.

LIGHTING TRANSFORMER RESIN CAST UPTO 630KVA
LOW TENSION POWER TRANSFORMER




RANGE OF MANUFACTURE :
1. Tapewound ring type current Transformers with and without mounting arrangements.
2. Tapewound ring type CTs with sealing arrangements.
3. Tapewound wound primary CTs (WPL)
4. Resincast (epoxy) BPL CTs.
5. Resincast (epoxy) wound primary (WPL) CTs.
6. Bushing CTs (Fibreglass taped).



RECTIFIER UNITS FOR ELECTROPLATING AND ANODISING
STEP-SYN A.C. SYNCHRONOUS MOTOR

DESCRIPTION

These are basically two phase motors. Two-phase supply is normally not available, hence to operate the motors from single phase AC supply, second phase is artificially created by inserting a Capacitor and Resistor combination in series with one of the motor phase windings. Suitable combination of Capacitor and Resistor assembly is supplied along with the motor. The speed of revolution is 60 RPM at 50Hz. Instant stop & reversibility are achieved by means of a single-pole, double throw switch with center OFF position.


FEATURES
   •   

Instant start & stop.

The motors have permanent magnet on the toothed rotor. The rotor is locked with matching teeth on stator, as soon as power is switched OFF.

Starting & running current are same.
Maximum Torque is 15 to 20% higher than nominal torque.


TEST BENCH UNIT



AE Manufactures Test bench units Which can be used for several Application of which few are mentioned below.

Testing Induction Motors.
Testing of Transformer.
Testing of Analog & Digital meters.
Testing of electrical devices like MCB, MCCB, ACB etc.

The test enches are coupled with
Our own make Dimmerstats,
Stabilizer or Current Injection
Test kits for carrying out the tests like:
No load test
Full load test
Short circuit test
Temperature rise test
Operating characteristics etc.
ORDERING INFORMATION
Unit under test
Complete technical specifications of the unit under test.
Mechanical dimensions of the test bench desired
Type of meters reqd- Analog / Digital
Any other specific features



ULTRA ISOLATION TRANSFORMER


Features
Filters power line noise, spikes and transients.
Isolates sensitive equipment from noisy power lines.
Complete with electrostatic sheilding.
Minimizing common mode noise.

ELECTRICAL SPECIFICATIONS
  Single Phase Three Phase
RATING 1kVA to 25kVA, 50Hz 1kVA to 100kVA, 50Hz
INPUT VOLTAGE 115V / 230V / 240V nominal 380 / 415 / 440V nominal.
ACCEPTABLE INPUT VOLTAGE ±10 %
OUTPUT VOLTAGE ± 10%
MODE of OPERATING 1:1 Isolation Transformer
COMMON MODE NOISE REDUCTION TRANSIENTS, SPIKES, SURGES. Over 120dB Over 100dB
COUPLING CAPACITACE Less than 0.005pF Less than 0.05pF
D.C. GALVANIC ISOLATION Over 500M O between any winding or winding to the ground.
BREAKDOWN STRENGTH 2.5kV AC for 1 minute.
ACCEPTABLE LINE FREQUENCY 47 Hz to 63 Hz
LINE LEAKAGE CURRENT Less than 25µA Less than 50µA
LOAD REGULATION Within 3% to 4% Within 3% to 5%
TERMINATION On terminal block On terminal plate
FINISH 7 tank pre-treatment, primer coating & two coas of final finish paint.


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