Potential Transformer Fuses
Potential Transformer fuses are applied wherever it is necessary to limit the short-circuit currents on high capacity systems.
Features
- Quiet Safe Operation
- Available in indicating and non-indicating versions.
- No exhaust venting, flame boxes or reinforcing is required.
- Provide positive interruption even on low fault currents.
- Disconnect and non-disconnect mountings are available.
- Various sizes available for a wide range of applications.
- Current ratings from 1/2E to 10E are available at 600V to 34.5kV.
Applications
- These types of fuses are used on conjunction with potential and control power transformers.
- PT fuses are applied in industrial installations and commercial buildings for Potential Transformer and Control Power Transformer protection.
Definitions
- E-rating: Over 100E must melt in 600 seconds (10 minutes) on 220 to 264% of E (ampere) rating. Example a 750E fuse must melt in 600 seconds with an applied current of 1650 to 1980 amperes.
- General Purpose Current-Limiting Fuse: A general purpose current-limiting power fuse is one that is capable of interrupting all currents from its rated interrupting rating down to the current that causes melting of the fusible element in one hour.
Brands:
- Bussmann
- Eaton Cutler Hammer Westinghouse
- Ferraz Shawmut
- General Electric
- Littelfuse
- Cooper Power Systems
