Description
9T51B0013 General Single Phase Control Transformer
Product Dimensions：
Product Description (Detailed Explanation)
The 9T51B0013 belongs to the Type QB series. Its defining feature is the encapsulated core and coils, which are sealed in a high-grade silica sand and resin compound. This encapsulation protects the internal electrical components from environmental contaminants, moisture, and corrosion.
The unit is housed in a NEMA 3R non-ventilated enclosure, making it rugged enough for outdoor installation while maintaining a compact footprint for wall mounting. It is a K1 factor rated transformer, meaning it is optimized for standard linear loads without significant harmonic content.
Product Parameters (Technical Specifications)
| Parameter Category | Specification |
| Model Series | Type QB (General Purpose) |
| Power Rating | 3 kVA |
| Phase | 1-Phase (Single Phase) |
| Primary Voltage | 240 x 480 VAC |
| Secondary Voltage | 120 / 240 VAC |
| Frequency | 60 Hz |
| Insulation Class | 180°C (IS-12 Insulation System) |
| Temperature Rise | 115°C (or 100°C depending on specific load) |
| Enclosure Type | NEMA 3R (Rainproof/Outdoor) |
| Core Material | High-grade Silicon Steel |
| Coil Material | Copper (CU) |
| Mounting | Wall Mount (Slot holes for easy access) |
| Weight | Approx. 55 lbs (25 kg) |
| Dimensions | 11.1″ H x 9.4″ W x 6.7″ D |
Product Advantages (Key Benefits)
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Weatherproof Reliability: The NEMA 3R enclosure and encapsulated design ensure the transformer can withstand rain, sleet, and snow, making it ideal for outdoor utility use.
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Quiet Operation: Designed to meet or exceed NEMA ST-20 sound standards, reducing audible “hum” in sensitive environments.
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Easy Installation: Features integrated keyhole mounting slots on the side and accessible knockouts on the back and bottom for streamlined wiring.
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Long Service Life: The resin-encapsulation prevents the oxidation of coils and provides superior heat dissipation compared to standard open-core units.
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Safety Standards: UL and cUL listed, ensuring compliance with strict North American safety regulations for electrical distribution.
Precautions (Important Notes)
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No Taps: This specific model (9T51B0013) does not feature primary or secondary taps for voltage adjustment. Ensure your source voltage strictly matches the 240/480V rating.
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Grounding: The wiring compartment includes a dedicated ground stud. Always ensure the unit is properly grounded to the system earth before energizing to prevent electric shock.
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Load Type: This is a K1-rated transformer. It is not designed for non-linear loads (like heavy variable frequency drives or high-density server racks) that produce significant harmonics.
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Airflow Space: Although it is a non-ventilated enclosure, maintain adequate clearance around the unit (typically 6 inches) to allow for passive radiant cooling.
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Weight Support: At 55 lbs, ensure the mounting wall and hardware are rated to support the static load plus vibration.
Product Applications (Typical Use Cases)
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Commercial Lighting: Stepping down 480V distribution power to 120V for office lighting and convenience outlets.
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Industrial Control: Providing localized 120/240V power for control panels and small motors within a factory setting.
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Outdoor Equipment: Powering signage, security cameras, or remote irrigation controllers in exposed locations.
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HVAC Systems: Supplying power to fans, dampers, and secondary control circuits in building management systems.
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Process Machinery: Integrated into machine tools to provide stable voltage for auxiliary electronic components.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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