Single-Phase Servo Regulators

Single-phase servo regulators are voltage regulators that keep the output constant by correcting the voltage of a single-phase (phase-neutral) line with a servo motor variable transformer. They are used in homes, offices, shops and small workshops to protect combi boilers, air conditioners, refrigerators, computers and single-phase machines from voltage drops and rises. This category includes Siel fully automatic models with 1ph/1ph input-output; power ratings such as 3.5 kVA, 7.5 kVA, 15 kVA and 40 kVA are available. Choose the regulator's power by the sum of the rated powers of the devices that will run at the same time and by the inrush current of motor-driven appliances such as refrigerators, air conditioners and hydrophores, and choose the input voltage range by the lowest voltage measured on your line. In high-power single-phase models the input current is large, so the supply cable and fuse must be sized according to the installation project. Because a regulator contains no battery, it does not supply devices when the power is cut and does not replace an uninterruptible power supply (UPS).

Products

How to choose Single-Phase Servo Regulators

Single-phase servo regulators are voltage regulators that keep the output constant by correcting the voltage of a single-phase (phase-neutral) line with a servo motor variable transformer. They are used in homes, offices, shops and small workshops to protect combi boilers, air conditioners, refrigerators, computers and single-phase machines from voltage drops and rises.

  • 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 Single-Phase Servo Regulators and where is it used?

Single-phase servo regulators are voltage regulators that keep the output constant by correcting the voltage of a single-phase (phase-neutral) line with a servo motor variable transformer. They are used in homes, offices, shops and small workshops to protect combi boilers, air conditioners, refrigerators, computers and single-phase machines from voltage drops and rises.

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

Choose the regulator's power by the sum of the rated powers of the devices that will run at the same time and by the inrush current of motor-driven appliances such as refrigerators, air conditioners and hydrophores, and choose the input voltage range by the lowest voltage measured on your line.

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

Because a regulator contains no battery, it does not supply devices when the power is cut and does not replace an uninterruptible power supply (UPS).

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