Three-Phase Servo Regulators Selection Guide: Technical Criteria & Application Standards
Three-Phase Servo Regulators selection guide: technical parameters, mounting and compliance standards, and Siel comparison.
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. The Three-Phase Servo Regulators category on Welibaba includes 10 active models from leading manufacturers such as Siel.
Key Technical Parameters for Selecting Three-Phase Servo Regulators
To specify the right Three-Phase Servo Regulators model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Manufacturer & Series | Siel | Select according to panel and installation compatibility |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Servo Regulators.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as Single-Phase Servo Regulators.
Frequently Asked Questions
What is the first parameter to check when selecting Three-Phase Servo Regulators?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the Three-Phase Servo Regulators page to narrow down compatible series.
Which Three-Phase Servo Regulators brands are available on Welibaba?
Welibaba currently stocks 10 active models in this category from manufacturers including Siel, complete with verified specifications and unit pricing.
How can I compare Three-Phase Servo Regulators models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.