Antares is a single phase electro-mechanical stabilizer. The electromechanical stabilizers are digitally controlled and are made essentially of buck-boost transformer, voltage regulator and electronic control. By means of the digitally controlled system, the stabilizer is able to compensate for a widely fluctuating input voltage stabilizing it within a ±0.5% accuracy range in relation to the rated value. Based on a microprocessor sampling the output voltage at high frequency, the control system operates the voltage regulator motors in order to guarantee the voltage stability. The electromechanical stabilizers are often used in industrial installations, or installations of big nominal power where the most important criteria are endurance in very high or very low voltages and a high degree of stabilization. Antares stabilizers are available for different ranges of input voltage fluctuation. Standard models offer a double input connection so that with the same unit two different input variations (±15%/±20% or ±25%/±30%) can be dealt with. An automatic circuit breaker is provided on the regulation circuit to protect against overload and short circuit on the voltage regulator whilst the auxiliary circuit is protected by fuses. The instrumentation consists of a digital multimeter installed on the cabinet front panel. The alarms (min/max output voltage, gearmotor lock, internal overheating, regulator overload) are recognizable by means of LEDs on the control card. The control logic is based on a digital microprocessor. All Antares stabilizers are fitted with the same control card, thus simplifying maintenance operations and spare parts storage.
Electro-Mechanical Voltage Stabilizers
Antares - 1ph 15-135KVA electro-mechanical digitally controlled
- Selectable output voltage (dip-switch) - 220-230-240V
- Output voltage accuracy ±0,5%
- Frequency 50Hz ±5% or 60Hz ±5%
- Admitted load variation - Up to 100%
- Cooling - Natural ventilation (aided with fans)
- Ambient temperature -25/+45°C
- Storage temperature -25/+60°C
- Max relative humidity <95% (non condensing)
- Admitted overload - 200% 2min.
- Harmonic distortion - None introduced
- Color RAL 7035
- Protection degree IP 21
- Instrumentation Output digital multimeter
- Installation Indoor
- Overvoltage protection - Output class II surge arrestors
Often referred to as ‘booster’ transformer, it is a standard dry-type transformer with the secondary winding connected in series to the mains and the primary winding supplied by the voltage regulator.
Basically, it is an autotransformer with continuously variable transformer ratio. The voltage intake varies depending on the position of the rolling contacts; therefore the voltage supplied to the booster transformer primary winding also varies. Being the voltage across the regulator contacts (and consequently that on the secondary winding of the booster transformer) either in phase or in opposition to the supply voltage, it is then added or subtracted to the supply voltage, thus compensating its variations.
Auxiliary circuit with microprocessor
The DSP (Digital Signal Processor) microprocessor-based control circuit (specifically designed for drives with totally digitalised signal) compares the output voltage value to the reference one sampling it 2000 times per second. When an anomaly is detected, the control drives the voltage regulator gearmotor. By doing so, the regulator rollers change their position thus varying the voltage drawn and supplied to the buck/boost transformer primary winding. The input voltage variation is therefore automatically compensated. The control system and the construction methods of the machine ensure that the output accuracy is ± 0.5%.
- Interrupting devices
- Load protection against over/undervoltage
- Manual by-pass line
- Input isolating transformer
- SPD surge arrestor
- EMI/RFI filters
- Up to IP55 protection degree for indoor and outdoor installation
Combinations or one or more of the accessories listed in the following might result in an increase of the stabilizer overall dimensions and weight.