Product Description
GE 9T21B1005G02 Type QMS Dry-Type Encapsulated Transformer – 7.5 kVA, Single-Phase, 60 Hz
This used GE transformer is a high-quality, dry-type encapsulated unit designed for general-purpose step-down applications in industrial, commercial, and institutional settings. The Type QMS series features encapsulated core and coils in a rugged NEMA 3R weatherproof enclosure, making it suitable for both indoor and outdoor installations .
Key Specifications
| Specification | Details |
|---|---|
| Manufacturer | GE Industrial Systems |
| Part Number | 9T21B1005G02 |
| Series | Type QMS |
| Power Rating | 7.5 kVA |
| Frequency | 60 Hz |
| Phase | Single Phase |
| Impedance | 3.1% |
| Primary Voltage | 240/480 VAC (dual primary windings for series/parallel connection) |
| Secondary Voltage | 120/240 VAC |
| Enclosure Type | NEMA 3R (weatherproof, non-ventilated) – suitable for indoor/outdoor use |
| Construction | Encapsulated core and coils for quiet, reliable operation |
| Core Material | High-grade silicon steel for low losses |
| Insulation | IS-12 rated |
| Temperature Rating | 40°C ambient |
| Mounting | Wall-mount with side mounting holes for easy access |
| Dimensions | 17.1″ H x 10.6″ W x 11″ D |
| Enclosure Material | Steel |
| Terminations | Lugs/bolt-down terminals with ground stud in wiring compartment |
| Approvals | UL and cUL Listed |
| Application | Lighting, appliance, and power loads from electrical distribution systems |
Features & Benefits
-
Encapsulated Design: Core and coils are encapsulated for protection against moisture, dust, and contaminants – ideal for harsh environments
-
NEMA 3R Weatherproof Enclosure: Suitable for both indoor and outdoor installations without additional protection
-
Quiet Operation: Engineered for low audible noise in occupied spaces
-
Flexible Wiring: Dual primary and secondary voltages allow series or parallel connections for various applications (240/480V primary to 120/240V secondary)
-
Easy Installation: Knockouts on back and bottom; side mounting holes for secure wall attachment
-
Low Loss Core: High-grade silicon steel minimizes no-load losses
-
No Taps: Simple, reliable design
-
K-1 K-Factor Rating: Suitable for general purpose loads with some harmonic content
Typical Applications
-
Step-Down Distribution: 480V to 120/240V for lighting and appliance loads
-
Industrial Control Panels: Isolation and voltage conversion for control circuits
-
Commercial Buildings: Power for HVAC, lighting, and receptacle loads
-
Machine Tools: Voltage matching for equipment brought from different facilities
-
Renewable Energy: Isolation transformers for solar and wind systems
-
Temporary Power: Construction sites and temporary installations (weatherproof enclosure)
Connection Flexibility
The dual-voltage primary and secondary windings allow several common configurations:
-
Primary: 240V or 480V (series or parallel connection)
-
Secondary: 120V or 240V (center-tapped for 120/240V split-phase)
Refer to the wiring diagram on the transformer nameplate for proper connection.
Condition
SOLD AS IS
USED – SHOWS NORMAL INDUSTRIAL WEAR (scuffs, paint wear, minor surface rust possible)
UNTESTED – ELECTRICAL PERFORMANCE NOT VERIFIED
TERMINALS/LUGS: INSPECT FOR DAMAGE, CORROSION [Specify condition]
ENCLOSURE: INSPECT FOR DENTS, RUST [Specify condition]
NO MOUNTING HARDWARE INCLUDED
NO WIRING DIAGRAM INCLUDED (unless present on unit)
PICTURE MAY NOT MATCH PRODUCT
⚠ ELECTRICAL NOTE: This is a heavy, high-voltage electrical device. Installation should only be performed by qualified electrical personnel following all applicable codes and safety practices. Verify primary/secondary connections match your application requirements before energizing.
| Weight | 200.3 lbs |
|---|---|
| Dimensions | 36 × 24 × 22 in |
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