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250 VA | 120 × 240 VAC Primary | 12/24 VAC Secondary | NEMA Type 3R
The SolaHD HS19B250 is a 250 VA single phase dry-type transformer designed for buck-boost voltage correction, low-voltage lighting, control panels and other applications requiring a small increase or decrease in supply voltage.
This model has a 120 × 240 VAC dual-voltage primary and a 12/24 VAC dual-voltage secondary operating at 50/60 Hz. It uses non-encapsulated construction in a compact enclosure suitable for indoor or outdoor service.
| Wallco Product Code | HS19B250 |
| Data Sheet Catalog Number | HS19B250 |
| Product Family | Buck-Boost Transformers |
| Power Rating | 250 VA |
| Phase | Single Phase |
| Primary Voltage | 120 × 240 VAC |
| Secondary Voltage | 12/24 VAC |
| Frequency | 50/60 Hz |
| Construction | Non-Encapsulated |
| Installation | Wall Mount |
| Dimensions | 7.50 H × 4.00 W × 4.00 D inches |
| Approximate Shipping Weight | 8.0 lb. |
| Maximum Secondary Amperage | 20.8 A at 12 V; 10.4 A at 24 V |
| Design Style | Style 2 |
| Electrical Connection | Connection 1 |
SolaHD buck-boost transformers are shipped as insulating/isolating transformers with dual-voltage primary and secondary windings. When field connected as an autotransformer, they can efficiently raise or lower supply voltage by a small amount, typically 5% to 27%.
Confirm the measured input voltage, required load voltage, load kVA or amperage, frequency and phase before ordering. Three-phase buck-boost applications require two or three transformers. See the Manufacturer's Data Sheet tab for selection tables, fuse sizing and electrical connection diagrams.
