Static Stabilizer (PWM-IGBT)

The static stabilizer offers a reasonable improvement on slow servo controlled stabilizer as well as other static tap changing stabilizers. This technology does not cause di/dt problems as it does not switch the power path. The basic topology is with buck-boost transformer with high primary to secondary ratio for voltage correction of ± 25%. The control voltage is imposed on the primary of this buck-boost transformer. The voltage regulation with help of buck and boost topology is achieved electronically without the step changes in voltage that occur when the system regulates. This task is accomplished through a feedback and a control system implemented by using a microcontroller.The system uses IGBTs as power switches. Direct AC-AC converter circuit improve the overall system response and fast voltage correction. No storage capacitor increase life of the system. 20Khz PWM control operation using high end dsPIC controller to achieve correction time of 1 to 1.5 cycle. Excellent performance in voltage sensitive application.

The static stabilizer offers a reasonable improvement on slow servo controlled stabilizer as well as other static tap changing stabilizers. This technology does not cause di/dt problems as it does not switch the power path. The basic topology is with buck-boost transformer with high primary to secondary ratio for voltage correction of ± 25%. The control voltage is imposed on the primary of this buck-boost transformer. The voltage regulation with help of buck and boost topology is achieved electronically without the step changes in voltage that occur when the system regulates. This task is accomplished through a feedback and a control system implemented by using a microcontroller.

Rating

  • Single phase : 3 KVA to 30 KVA
  • Three phase : 10 KVA to 50 KVA

Input Voltage Range

  • Standard : 170-290 volts ac, 1-phase, 2 wire, 50Hz
  • Standard : 340-480 volts ac, 3-phase, 4 wire, 50Hz
Regulator Technology : High frequency 20k Hz IGBT driven voltage regulation converter.
Pulse width modulated (PWM) controlled direct ac to ac converter topology.
Input Nominal Voltage : 230 volts ac, 1-phase, 2 wire, 50Hz
400 volts ac,  3-phase, 4 wire, 50Hz
Input Nominal operating voltage : Range: 170-290 volts ac, 1-phase, 2 wire, 50 Hz
Range : 340-480 volts ac, 3-phase, 4 wire, 50Hz
Input Nominal Frequency : 45 to 65 Hz
I/P circuit breaker & over current protection : I/P circuit breaker (with limited inrush current capability) & over-under voltage cut-off (at greater than 300 vac or less than 160 vac)
Output Nominal Voltage : 230/400 volts ac, three phase wye
Efficiency : Better than 96% (with 20-100 % load conditions)
Output Voltage Regulation : Nominal ± 1 % maximum under 0 to 100 % load & input of 185~265 vac
Automatic Bypass : Automatic bypass will be activated when there is a fault condition.
Safe Start : Unit starts on sine wave zero voltage crossing point upon turn-on.
Unit is fully functional/regulated within 5 seconds of mains restoration.
Common mode filtering : Neutral-ground bond eliminates all noise or voltage on neutral (< 0.5V) (in case of inbuilt IT)
Normal mode filtering : A built-in inductor-capacitor filter attenuates EMI/RFI noise from O/P.
System Status Indicator : Green LED (ON) indicates Normal (regulating mode) operation, Green LED blink - I/P or O/P UV/OV, Red LED-tRIP, Red LED blink - Overload short circuit.
Surge Let-Through
Voltages
(in case of inbuilt IT
or on request)
: Category A3, Ring Wave, 200 A: L-N:30 V. L-G : 30 V
Category B3, Combination Wave, 3000 A : L-N : 200 V, L-G : 200 V
Safety Standards : Protection class IP20.
Ambient Temperature : -5° to +50°C . 10 to 90 %.  RH non-condensing
# For more detailed specification refer catalogue
Sample Description