The Transformers Components dry-well fuseholder provides a method of placing dead front type current limiting fuses within the transformer or other electrical apparatus filled with transformer oil.
The trend towards higher system voltage, increased load density, and larger substations has caused higher fault current potentials on the distribution system and the need to interrupt those higher currents when a fault exists. Current-limiting fusing provides both a high interrupting current rating and limits the peak value of current and the amount of energy to within acceptable levels for protection of the transformer.
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Housing – The dry-well housing consists of filament-wound glass tubing with a resin-rich outer. This outer surface serves as the barrier against oil permeation through the tubing wall. Â
Dry-well fuseholder location – In Pad Mounted transformer applications, the dry-well fuseholder is mounted on the transformer front plate, below the oil level. Because the current-limiting fuses that these fuse-holders are designed to accept will not function properly if exposed to transformer oil, the interior of the fuseholder must remain oil tight.
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ECI manufactures two types of dry well fuse holders:
Non-load break for use with both single and three phase padmount applications.
Non-load break for use with both single and three phase submersible applications.
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| Catalog Number | kV | BIL | Fuseholder CAP | Description |
| 7559ZC8399 | 21.1 | 125 kV | Plated Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZG8399 | 21.1 | 125 kV | Stainless Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZC8499 | 15.2 | 125 kV | Plated Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZG8499 | 15.2 | 125 kV | Stainless Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZC8599 | 8.3 | 95 kV | Plated Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZG8599 | 8.3 | 95 kV | Stainless Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| Catalog Number | kV | BIL | Cap | Description |
| 7559ZC2599 | 21.1 | 150 kV | Plated Steel | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| Catalog Numbers | kV | BIL | End Cap Stud (0.25-20-2B) | Description |
| 7509ZE0199 | 8.3 | 95 kV | No | Typical non-loadbreak submersible construction fuseholder and current limiting fuse assembly. |
| 7509ZE3199 | 8.3 | 95 kV | Yes | Typical non-loadbreak submersible construction fuseholder and current limiting fuse assembly. |
| 7509ZE0299 | 15.2 | 125 kV | No | Typical non-loadbreak submersible construction fuseholder and current limiting fuse assembly. |
| 7509ZE3299 | 15.2 | 125 kV | Yes | Typical non-loadbreak submersible construction fuseholder and current limiting fuse assembly. |
| 7509ZE0399 | 21.1 | 125 kV | No | Typical non-loadbreak submersible construction fuseholder and current limiting fuse assembly. |
| 7509ZE3399 | 21.1 | 125 kV | Yes | Typical non-loadbreak submersible construction fuseholder and current limiting fuse assembly. |
| Catalog Number | kV | BIL | End Cap Stud (-.250-20-2B) | Description |
| 7559ZE1199 | 8.3 | 95 kV | No | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZE2199 | 8.3 | 95 kV | Yes | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZE1299 | 15.2 | 125 kV | No | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly |
| 7559ZE2299 | 15.2 | 125 kV | Yes | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZE1399 | 21.1 | 125 kV | No | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
| 7559ZE2399 | 21.1 | 125 kV | Yes | Typical non-loadbreak standard construction fuseholder and current limiting fuse assembly. |
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