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Measurements of impedances for determinating the minimum short-circuit current in main systems 500 V of underground mining establishments

Journal Article:

Abstract

The complex short-circuit impedances of energized low-voltage main systems were measured with a double-bridge in underground mining operation. The magnitude of the short-circuit currents depends on these impedances. Customary calculations of such currents depend on empirical approximations. To verify the accuracy of these approximations, the measured impedances of 61 nodes in three different main systems were compared with the results of the calculations. The comparison made between the short-circuit currents determined by measurable quantities and the values calculated according to VDE 0118 shows that the stipulated coefficients for calculating the minimum short-circuit currents lie very far on the safe side. An amendment for calculating the short-circuit in accordance with VDE 0118 is therefore suggested.
Authors:
Publication Date:
Sep 01, 1981
Product Type:
Journal Article
Reference Number:
ERA-07-032309; EDB-82-078802
Resource Relation:
Journal Name: ETZ Arch.; (Germany, Federal Republic of); Journal Volume: 3:9
Subject:
42 ENGINEERING; 01 COAL, LIGNITE, AND PEAT; ELECTRIC IMPEDANCE; ELECTRICAL FAULTS; ELECTRIC IMPEDANC; CALCULATION METHODS; MEASURING INSTRUMENTS; UNDERGROUND MINING; ELECTRICAL EQUIPMENT; ELECTRIC CURRENTS; CURRENTS; EQUIPMENT; IMPEDANCE; MINING; 422000* - Engineering- Mining & Underground Engineering- (1980-); 012000 - Coal, Lignite, & Peat- Mining
OSTI ID:
5506978
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: ETZAD
Submitting Site:
DE
Size:
Pages: 319-323
Announcement Date:

Journal Article:

Citation Formats

Rittinghaus, D. Measurements of impedances for determinating the minimum short-circuit current in main systems 500 V of underground mining establishments. Germany: N. p., 1981. Web.
Rittinghaus, D. Measurements of impedances for determinating the minimum short-circuit current in main systems 500 V of underground mining establishments. Germany.
Rittinghaus, D. 1981. "Measurements of impedances for determinating the minimum short-circuit current in main systems 500 V of underground mining establishments." Germany.
@misc{etde_5506978,
title = {Measurements of impedances for determinating the minimum short-circuit current in main systems 500 V of underground mining establishments}
author = {Rittinghaus, D}
abstractNote = {The complex short-circuit impedances of energized low-voltage main systems were measured with a double-bridge in underground mining operation. The magnitude of the short-circuit currents depends on these impedances. Customary calculations of such currents depend on empirical approximations. To verify the accuracy of these approximations, the measured impedances of 61 nodes in three different main systems were compared with the results of the calculations. The comparison made between the short-circuit currents determined by measurable quantities and the values calculated according to VDE 0118 shows that the stipulated coefficients for calculating the minimum short-circuit currents lie very far on the safe side. An amendment for calculating the short-circuit in accordance with VDE 0118 is therefore suggested.}
journal = {ETZ Arch.; (Germany, Federal Republic of)}
volume = {3:9}
journal type = {AC}
place = {Germany}
year = {1981}
month = {Sep}
}