75 kva transformer weight
The following is the **weight reference** for a **75 kVA transformer**, covering **dry type and oil-cooled type**, as well as
**common brand models in the United States**, and attached with **model selection suggestions**:
I. Core Weight Data (Mainstream Models in the US Market)
| Type | Typical Brands and Models | Weight (in pounds) | Dimensions (in inches) | Installation Environment |
| Three-phase Dry Type | Square D QO75T3H | 544 pounds | 30×20×37 (Width×Depth×Height) | Indoor (NEMA 1) |
| Three-phase Oil-cooled Type | Eaton 4468 (150 kVA) | 700 pounds | 49×37×46 | Outdoor (NEMA 3R) |
| Three-phase Oil-cooled Type | General Electric GE 9T213BC3 | Approximately 600 pounds | 36×24×40 (Estimated) | Outdoor/Indoor |
| Single-phase Dry Type | Hammond 167H (30 kVA) | 180 pounds | 18×12×24 | Indoor |
II. Key Explanations
1. **Dry Type vs Oil-cooled Type**
- **Dry-type Transformer**: Light in weight (approximately 500~600 pounds for 75 kVA), suitable for indoor installation
due to the absence of cooling oil.
- **Oil-cooled Transformer**: The weight of a 75 kVA oil-cooled transformer is **usually 20%~30% heavier than that of a
dry type** (estimated to be approximately 600~700 pounds), including transformer oil and a heat dissipation structure.
2. **Brand Differences**
- Square D QO75T3H (544 pounds): **The most common model in the United States**, UL certified, with an installation bracket attached.
- General Electric GE 9T213BC3: **75 kVA oil-cooled type** (Unofficial data), which is 14% lighter in weight than the Eaton 150 kVA model.
III. Model Selection and Installation Precautions
1. **Transportation and Hoisting**
- A 75 kVA dry-type transformer requires **2 to 3 people for handling**, or a forklift can be used (with a pallet interface at the bottom).
- An oil-cooled transformer requires **a forklift + slings**, and pay attention to the balance of the center of gravity (there are
lifting rings at the bottom).
2. **Load-bearing Capacity of the Installation Base**
- Indoor: The cement floor needs to bear a load of **≥600 pounds per square foot** (for dry type).
- Outdoor: An oil-cooled transformer requires a **concrete foundation** (with a thickness ≥6 inches and an area ≥4×3 feet).
IV. Quick Inquiry Suggestions
1. **Confirm the Model**
- If it is **Square D QO75T3H**, directly refer to **544 pounds** (which can be found in the official manual).
- For other models (such as Eaton 75 kVA), contact the supplier to obtain the **Spec Sheet**.
2. **Second-hand Transformers**
- When searching for models on eBay or Surplus Record, the **weight is often indicated in the "Shipping Details"**.
**Conclusion**: The weight of a 75 kVA three-phase dry-type transformer is **approximately 544 pounds** (such as Square D),
and that of an oil-cooled type is **approximately 600~700 pounds**, subject to the specific model.
