Three-Phase On-Load Voltage Regulator Transformer
Utilizing transformer oil as a dual-purpose medium for insulation and cooling, the oil-immersed transformer incorporates its main components, such as the iron core and windings, into the oil, thus enabling efficient insulation and heat dissipation.
Product Details：Three-phase three-winding on-load voltage regulator transformer
The oil-immersed transformer boasts excellent load adaptability and minimal maintenance requirements. It flexibly adjusts input and output currents to suit varying load demands. With minimal maintenance, it maintains smooth operation through regular inspections and oil changes. Additionally, it efficiently manages internal winding temperatures, minimizing energy wastage and enhancing operational efficiency, ultimately delivering high-performance power transmission.
PARAMETER：
Model | OSFPZ-300000/400 | OSFPSZ-315000/400 | SFZ-4380000/420 |
Capacitance ratio (MVA) | 300/300/100 | 315/315/105 | 438/438 |
Ratio-voltage (kV) | 400±8×1.25%/115/10.5 | 400±8×1.25%/220/33 | 420(-10，+6)×1.25%/20 |
voltage regulation mode | Variable magnetic flux | Constant magnetic flux | Constant magnetic flux |
Open circuit losses (kW) | 78.01 | 55.96 | 149.56 |
Load losses (kW) | 581.95 | 430.88 | 779.93 |
Impedance voltage (%) | 14.3 (High-Medium) | 12.5 (high-medium) / 45 (high-low) / 30 (medium-low) | 14.31 |
Oil oil temperature rise (K) | 37.1 | 34.2 | 30.7 |
Maximum Winding temperature rise (K) | 56 | 47.3 | 47.5 |
No-load noise (dB (A)) | 64.7 | 60 | 67 |
Measured local level (pC) | 80 | 100 | 90 |
1. Scenarios for use
Large machinery and mining equipment: These equipments need high-current starting power supply during start-up and lower voltage and current supply during normal operation. Three-phase three-winding transformer can realize this special power supply requirement through reasonable design, to ensure the normal operation of the equipment.
2. Maintenance cycle
（1）Regular maintenance: in general, three-phase three winding transformer needs regular maintenance to ensure its normal operation. Regular maintenance cycle is generally once a year.
（2）Long cycle maintenance: in addition to regular maintenance, but also need to carry out a longer cycle of maintenance, in order to thoroughly overhaul the equipment, preventive troubleshooting potential failures. Long-term maintenance cycle is generally once every three years.
3. Precautions
Overload protection: install overload protection device, once the overload situation occurs, cut off the power supply or reduce the load in time to prevent the transformer from being damaged.
Short-circuit detection: regular short-circuit test, find problems in time to avoid short-circuit accidents on equipment and personnel damage.
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