Three-Phase Servo Regulators

Three-phase servo regulators are voltage regulators that correct the voltage of a three-phase mains with servo motor variable transformers and give a constant voltage to a three-phase load. They are connected at the main panel input, or in front of a single machine such as a CNC machine, compressor, elevator or injection molding machine, in three-phase facilities such as factories, workshops, construction sites, hotels and hospitals. This category includes Siel fully automatic models with 3ph/3ph input-output; power ratings such as 10.5 kVA, 22.5 kVA, 45 kVA, 75 kVA and 150 kVA are available. Choose the power by the total load of the facility (kVA) and the inrush current of the largest motor, the regulation structure by the load imbalance between phases, and the input voltage range by the voltage measured on the mains. In facilities where single-phase loads are not evenly distributed across phases, look for a structure with independent per-phase regulation that corrects each phase separately; this feature should be verified from the manufacturer's data. A 3ph/3ph regulator connects to a three-phase mains; it does not generate three phases from a single-phase line and does not replace the phase converter used for that purpose.

Products

How to choose Three-Phase Servo Regulators

Three-phase servo regulators are voltage regulators that correct the voltage of a three-phase mains with servo motor variable transformers and give a constant voltage to a three-phase load. They are connected at the main panel input, or in front of a single machine such as a CNC machine, compressor, elevator or injection molding machine, in three-phase facilities such as factories, workshops, construction sites, hotels and hospitals.

  • Determine whether backup power bridging (UPS) or voltage regulation is required.
  • Calculate kVA rating, phase configuration and backup runtime from the critical load list.
  • Verify battery bank, bypass topology and monitoring interface requirements.

Frequently asked questions

What is Three-Phase Servo Regulators and where is it used?

Three-phase servo regulators are voltage regulators that correct the voltage of a three-phase mains with servo motor variable transformers and give a constant voltage to a three-phase load. They are connected at the main panel input, or in front of a single machine such as a CNC machine, compressor, elevator or injection molding machine, in three-phase facilities such as factories, workshops, construction sites, hotels and hospitals.

What should I compare when choosing Three-Phase Servo Regulators?

Choose the power by the total load of the facility (kVA) and the inrush current of the largest motor, the regulation structure by the load imbalance between phases, and the input voltage range by the voltage measured on the mains.

Where can I find technical details for Three-Phase Servo Regulators products?

In facilities where single-phase loads are not evenly distributed across phases, look for a structure with independent per-phase regulation that corrects each phase separately; this feature should be verified from the manufacturer's data.

Three-Phase Servo Regulators Selection Guide: Technical Criteria & Application Standards