|
|
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. |
FEATURES |
• |
Waveform distortion - nil. |
• |
98 - 99% efficiency (achieved by optimum design & by use of imported hi-quality CRGO laminations & copper of 99.9% purity). |
• |
Speed of correction up to 70V/sec. |
• |
Response time - less than 20 m/sec. |
• |
Immune to load PF & supply frequency variations. |
• |
Power loss 2% max. |
• |
Duty cycle continuous. |
• |
Life expectancy - 20 - 25 years. |
• |
Easy & simple maintenance (with plug-in PCBs). |
• |
Protections - over voltage / under voltage / overload / single phasing (optional). |
• |
Very high reliability. |
• |
Considerable short time overload capacity. |
• |
Output voltage setting (by potentiometer in Auto Mode & by 'Raise' / 'Lower' Push Button in ManualMode). |
• |
Operation - Auto or Manual. |
• |
LED Indications for Input Voltage 'High' / 'Low'. |
• |
Metering (Analogue or Digital) - AC voltmeter with / without selector switch. |
• |
Non-standard requirements can be catered to, such as AC Ammeter, Frequency Meter, PhaseSequence Meter, Single Phasing Preventer, Stabilizer by-pass arrangement, etc. |
ELECTRICAL SPECIFICATIONS |
• |
MODEL |
EMS - 12 |
• |
TYPE |
Indoor, Floor Mounting. |
• |
COOLING |
Air - Cooled / Oil Cooled / Air - Oil Cooled. |
• |
INPUT |
160 - 260V / 180 - 250V, 1 Phase AC.
300 - 460V / 360 - 460V, 3Phase, 4 Wire (or 3 Wire if required) AC (Balanced or Unbalanced). |
• |
OUTPUT |
230V / 240V ± 1%,1 Phase AC. |
|
|
380V / 400V / 415V ± 1%, 3Phase AC. |
• |
CAPACITY |
1 kVA - 2000kVA |
• |
FREQUENCY |
50 - 60Hz. |
• |
INSULATION RESISTANCE |
Not less than 5 Mohms at 500V DC |
• |
DIELECTRIC TEST |
1.5kV RMS for 1 minute. |
• |
OPERATING TEMP. |
0°C to 50°C |
• |
STORAGE TEMP. |
- 9°C to 70°C |
• |
HUMIDITY |
upto 95% RH |
• |
CONFORMS TO |
I.S.9815 |
NOTES : |
• |
Input & output voltages, other than specified above, are available on specific request. |
• |
For 3 Phase balanced supply system, a common controller, connected to any one phase is employed. |
• |
For 3 Phase unbalanced supply system, 3 individual & independent controllers, one for each of the 3 Phases, are employed. |
• |
Oil should be 'Transformer Oil' Conforming to IS 335, I.E.C. 296. |
MECHANICAL CONSTRUCTION |
|
APPLICATIONS |
CNC Machines, Air Compressors, Textile Machines, Lightings, X-ray & Medical Equipments, Engineering Units, Computers, Pump Sets, Transmitters & many other similar applications. |
Ordering information |
• |
Model |
• |
Type |
• |
Cooling |
• |
Input Voltage (Balanced or Unbalanced) |
• |
Output Voltage |
• |
Capacity (kVA) |
• |
Protections (if required) |
• |
Non-standard metering. |
• |
With / without first filling of oil (only for oil cooled units). |
|
|
|
|
|
|
|
|
|