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Servo
Controlled Voltage Stabilizer |
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Features |
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Widely fluctuating mains supply is always a
cause of concern to the user ofmodern precision and sophisticated
electrical and electronic equipments,like computers& NC
/ CNC machine tools. Even the performance of more rugged equipmentlike
induction motors & heaters, deteriorates with fluctuatingsupplyvoltage.
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Servo-controlled voltage
stabilizer is an effective & economic solution to this
chronicproblem. These are made in large varieties to meet
every need of all types ofindustries.
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Specifications
Standardmodels voltage stabilizers
are made to following specification.
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Range
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1
PHASE |
3
PHASE |
| INPUT
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180V
- 260V |
300V
- 460V |
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360V
- 440V |
| OUTPUT |
230V
- 240V* |
380 / 400V / 415V* |
| FREQUENCY
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50
/ 60Hz
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| CAPACITY |
1
KVA TO 1000 KVA
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Any one output voltage will be available |
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Non standard models are made to customer's
specific requirements to caster any other input voltage range
/ output voltage / frequency / capacity etc. |
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3 Phase models with single voltage sensing
relay and single drive motor are suitable for fairly balanced
supply voltage and load. |
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To over come unbalanced voltage and load conditions,
3 Nos 1 phase units mounted in a single cabinet and connected
in star, are recommended. |
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Built
in Features |
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A Voltmeter with switch to indicate input /
output voltages. |
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Long term stability of ± 1%. |
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Output setting - ±
5 Volts by a lockable potentiometer. |
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High efficiency above 95%. |
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Indications for "Power ON", "Input
too low" & " Input too high". |
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A drive motor of special construction having
high torque, low speed output with instant start / stop /
reverse characteristics. |
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Construction
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Lower capacity units, up to 50KVA are in
air cooled single unit construction. Higher capacity units
will be in two piece construction for the convenience of
transportation & installation. Inter connecting cables
/ bus bars will be provided with the equipment. Both sections
will be floor mounting type, and either one or both may
be oil cooled depending on requirement. |
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Operation |
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The voltage stabilizer works on a simple
principal of adding or a subtracting a voltage to the supply
voltage in appropriate quantity to correct it to the required
level. This voltage to be added or subtracted is obtained
from the mains itself, using a continuously variable voltage
auto transformer, driven by a servo motor under the control
of voltage sensing relay. This relay sense the output voltage
continuously, compares with a highly stable reference and
directs the drive motor to correct the output voltage to
the set level. |
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Salient
Features |
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Fully solid state voltage sensing relay
using professional grade components. |
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No relay - No chattering - No RF interference. |
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Fast acting. |
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Fully tropicallised, most suitable for weather
conditions prevailing in Indian sub-continent. |
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Variable transformer and voltage sensing relay-most
important components are made in house under strict quality
control. |
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Variation in the supply, frequency and load
p. f. has no effect on the output voltage setting. |
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No harmonic distortion is introduced by the
stabilizer. |
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Optional
Features |
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Over voltage / under voltage protection
relays.
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Over load protection relay.
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Remote sensing facility.
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