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Series 900 Power Commander (15 kVA - 150 kVA) Single Phase
The Series 900 Power Commander is a high-performance magnetic voltage regulator designed for demanding testing and precision power applications. It delivers exceptionally tight voltage and load regulation with less than 5% harmonic distortion, ensuring stable, clean power for sensitive equipment. With superior fault-clearing capability, adjustable output voltage, and remote sensing to correct voltage drops, it safeguards critical systems while maximizing performance. Ruggedly built with a 20-year design life, minimal moving parts, and high efficiency up to 94%, the Power Commander is a reliable, low-maintenance solution for long-term operation.
Features
- High-Precision Voltage Regulation – Maintains output within ±1% even under input fluctuations from +10% to -20%, ensuring dependable power for sensitive loads.
- Exceptional Fault-Clearing Capability – Handles overloads up to 500% for 10 seconds and 1000% for one cycle, protecting equipment from power disturbances.
- Low Harmonic Distortion – Adds less than 5% THD under linear load, providing clean, computer-grade power that extends equipment lifespan.
- Adjustable Output Voltage – Internally adjustable ±10% range allows fine-tuning for testing environments and specialized applications.
- Rugged, Long-Life Construction – Designed for a 20-year service life with virtually no moving parts (fans in select models only), reducing maintenance.
- Remote Sensing Compensation – Corrects for voltage drops across wiring distances, ensuring precise power delivery directly at the load.
- High Operating Efficiency – Delivers 91%–94% efficiency depending on size, minimizing energy waste and lowering operational costs.
- Low Maintenance Reliability – Engineered with a simple, robust design for long-term, worry-free operation in industrial and commercial environments.
Specifications
- Voltage Regulation: ± 1% or better for input fluctuations of +10% to -20%, and from no load to full load
- Frequency Range: 57–63 Hz (60 Hz models) 48–52 Hz (50 Hz models)
- Output Voltage Adjustment: Adjustable to ± 10% via internal potentiometer
- Correction Time: 5–9 cycles under worst-case conditions
- Harmonic Content: Less than 5% THD added under linear load
- Efficiency: 91% to 94%, KVA size dependent
- Overload Capability: 500% for 10 seconds; 1000% for 1 cycle
- Single-Phase Sizes: 15 kVA, 25 kVA, 37.5 kVA, 50 kVA, 75 kVA, 100 kVA, 150 kVA
Documentation
Support
Services
Technical Support, Start Up Support, Preventative Maintenance, Field Service, In-house Repair, Spare Parts
Website: https://www.trystar.com/services/request-for-services/
Phone: 507-333-3990,1
Email: services@trystar.com
Sales Support
Quotes, lead times, and general product questions
Website: https://www.trystar.com/contact/
Phone: 507-333-3990,2
FAQs
How does the Power Commander regulate voltage?
The Power Commander uses the natural properties of magnetics to regulate voltage. The Power Commander changes the magnetic properties of a transformer through a control loop, thus changing the voltage either up or down.
What differentiates the Power Commander from other regulators?
The Power Commander can regulate voltage to within 1%, even with input voltage fluctuations of +10% to -20% of nominal, and from no load to full load. Most voltage regulators available today simply are not this precise. In addition, the output voltage may be sensed and regulated at the load, automatically compensating for line and wire losses due to long distance cable runs to the load!
Designed for Real-World Demands
Discover how this product is used across markets for different applications.

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