Development and testing of a prototype current limiting protector. Final report
A prototype pyrotechnically operated Current Limiting Protector (CLP) and a compatible high speed level sensing and trigger circuit were developed and tested. On operation in response to a short circuit a series of gaps are formed by chemical charges. The gap voltages permit commutation of the current to a parallel fusible element, which interrupts the current in a current limiting mode. The theory of the CLP was developed and confirmed with simulated dc tests and on ac tests in a high power short circuit laboratory. Prospective short circuits of 40,000 ampere (RMS sym) were limited to let-through currents of 9 to 22 kA (instantaneous), depending on the setting of the level sensing device. Some improvement of the packaging of the device and of the control circuits is required. The CLP offers economic single short current limiting protection of systems and devices, because of the low let-through current and i/sup 2/t. In addition the CLP may prove valuable as a means to extend the service life of equipment and of systems where the available short circuit has outgrown the equipment ratings.
- Research Organization:
- Phoenix Electric Corp., Canton, MA (USA)
- OSTI ID:
- 5653225
- Report Number(s):
- EPRI-EL-1250
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
CHEMICAL EXPLOSIVES
CONDUCTOR DEVICES
COPPER
CURRENT LIMITERS
DATA
DATA FORMS
DC SYSTEMS
DESIGN
ECONOMICS
ELECTRIC FUSES
ELECTRIC POWER
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
ELECTRONIC CIRCUITS
ELEMENTS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
ESTERS
EXPERIMENTAL DATA
EXPLOSIVES
INFORMATION
METALS
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PETN
POWER
POWER SYSTEMS
PULSE CIRCUITS
PYROTECHNIC DEVICES
SAFETY
SERVICE LIFE
TABLES
TESTING
TRANSITION ELEMENTS
TRIGGER CIRCUITS