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Development of High Voltage Permissible Loadcenter.

Authors
Berry-DR; Gillenwater-BB
Source
NTIS: PB 86-215803 :136 pages
Link
NIOSHTIC No.
10005162
Abstract
This report makes recommendations for new approval and testing criteria for high-voltage permissible loadcenters (transformer and switchgear, greater than 4,160 v) for underground U.S. mines and describes the development and testing of a prototype loadcenter to meet the criteria. The recommended criteria included new findings in several areas: minimum clearances between live conductors, special precautions for using organic insulators, tests for dielectric strength and electrical stress, and explosion testing. A research test program was conducted to evaluate the pressure rise caused by a high-energy arcing fault (10,000 a) with and without a simultaneous methane-air explosion inside the enclosure. The prototype loadcenter included a 1,250-k V.A, 7,200-v primary transformer inside a center compartment with separate, attached enclosures for high-voltage switchgear on one end and low-voltage distribution and protection on the other end. A comprehensive literature search was conducted, and a state-of-the-art review of research and industrial experience with high-voltage explosion-proof transformers is included.
Publication Date
19860101
Document Type
CP; Final Contract Report;
Fiscal Year
1986
NTIS Accession No.
PB86-215803
NTIS Price
A08
Identifying No.
OFR 58-86
NIOSH Division
PRC;
Source Name
NTIS: PB 86-215803
Performing Organization
Foster-Miller, Inc.
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