3PH VOLTAGE STABILISERS
INDEPENDENT REGULATION OF EACH PHASE
STEROSTAB Y THREE-PHASE 45-8000 KVA
|Nominal input voltage||380V or 400V or 415V (**)|
|Nominal output voltage||380V or 400V or 415V (**)|
|Output accuracy||±1% RMS|
|Frequency||50/60 Hz ±5%|
|Admitted load variation||0 to 100%|
|Admitted load unbalance||up to 100%|
|Admitted overload||10 times the nominal power during 10 ms, 5 times during 6 s, 2 times for 1 minute|
|Cooling||natural air convection|
|Standard fittings||digital voltmeter, pilot lamps, tropicalised control boards|
(**) to be specified on the order. Different voltage values available on request.
SHORT CIRCUIT PROTECTION
OVER/UNDER VOLTAGE PROTECTION
REVERSED PHASE SEQUENCE / PHASE FAILURE PROTECTION
MANUAL OR AUTOMATIC BY-PASS
DIGITAL NETWORK ANALYSER DISPLAYING THE ELECTRICAL PARAMETERS
IP54 INDOOR OR OUTDOOR VERSION
IREM MODULAR SYSTEM
IREM 3PH AVRs of higher power (from model Y326) are made in 3 sections in order to facilitate transport, handling, positioning and installation. This kind of structure has been designed as a solution to problems related to handling of extremely big loads not common in electrical systems. This solution particularly helps during preparation of the site, avoiding the use of expensive lifting equipment and building of special openings to access the technical room. The voltage stabiliser is made in separate sections corresponding to the single phase units which will be connected to the plant. No further interconnection between the different AVR sections is required, therefore the installation is perfectly similar to the connection of a voltage stabiliser made in one single cubicle. Each single phase unit includes all the control and regulation devices that determine its autonomous and independent operation. In the unlikely event of a failure, this type of design limits the fault propagation, ensuring the best functionality and allows to act in a targeted and selective way on the component without having to operate on the other sections.
In this case the solution allows to contain the periodic maintenance and repair costs.
REDUCED SHIPPING COSTS
Smart solution to problems related to handling/shipping of bulky loads.
REDUCED MAINTENANCE COSTS
Easy intervention on one section ensuring the functionality of the other units.
Excellent solution avoiding the use of expensive lifting equipment and building of special openings to access the installation room.
STEROSTAB Y INDEPENDENT REGULATION OF EACH PHASE
THREE-PHASE 400V 50/60 HZ PROTECTION DEGREE IP21
Fittings: V: digital voltmeter; L: pilot lamp
Note: models with different power, and/or different input range, and/or different output accuracy can be quoted on demand.
IREM AVRs are designed to deliver the declared power permanently (24/7) under the worst operating conditions, i.e. at full load, at minimum input voltage and max input current and at the declared ambient temperature.
3PH VOLTAGE STABILISERS Y MODELS
INDEPENDENT REGULATION OF EACH PHASE
The voltage regulator of Y series consists in a fully electronic control circuit, a servomotor, a variable autotransformer and a series transformer (booster) on each phase.
This system allows an independent regulation of the output voltage on each phase.
The control circuits are connected across the output of the regulator between phase and neutral. When the output voltage between phase and neutral varies from the pre-set value, an unbalance is detected by the control circuit: the signal is amplified and operates the servo driven motor of the variable autotransformer which gives the additive or subtractive voltage to the series transformer, necessary to have the correct output value.
The regulation of the output voltage is true RMS, therefore the voltage regulator is unaffected by possible harmonic distortion present on the supplying line.
This type of voltage regulator has the advantage of having no mobile contacts or brushes in series to the line, as the regulation is directly made by the series transformers.