Relay studies: Existing data, current testing and cabinet amplification
The seismic fragility of most electrical equipment is governed by the malfunction of relays. This paper discusses the combined study being performed at BNL by evaluating existing fragility test data, conducting a new relay test program and estimating the cabinet amplification at relay locations. Existing test data for relays have been collected and evaluated at BNL. The data base consists of results from a wide variety of test programs - single frequency, single axis, multifrequency, multiaxis tests. For most relays, the non-operating condition controls the chatter fragility limit. In order to characterize the effect of various parameters on the relay seismic capacity, a test program has been initiated at BNL. Selected test specimens will be tested to determine the influence of frequency of vibration, direction of motion, adjustments of relay parts, among others, on the relay capacities. The amplification study involves computing dynamic amplification factors at various device locations in motor control centers and switchgear cabinets. Fragility and high level qualification data have been used for this purpose. This paper includes a summary of the amplification results. 4 refs., 6 figs., 1 tab.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6168628
- Report Number(s):
- BNL-NUREG-42278; CONF-8810155-46; ON: DE89009520
- Resource Relation:
- Conference: 16. water reactor safety information meeting, Gaithersburg, MD, USA, 24 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Dynamic amplification of electrical cabinets. [1--100Hz]
Seismic capacity of switchgear
Related Subjects
42 ENGINEERING
ELECTRICAL EQUIPMENT
RELAYS
NUCLEAR POWER PLANTS
SEISMIC EFFECTS
AMPLIFICATION
BNL
DATA ANALYSIS
MECHANICAL VIBRATIONS
TESTING
EQUIPMENT
NATIONAL ORGANIZATIONS
NUCLEAR FACILITIES
POWER PLANTS
THERMAL POWER PLANTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
220200* - Nuclear Reactor Technology- Components & Accessories
420800 - Engineering- Electronic Circuits & Devices- (-1989)