LOW VOLTAGE NETWORKS INSULATION MONITORING WITH TWO AND THREE VOLTMETER READOUTS METHODS
Journal Title: Електротехніка і Електромеханіка - Year 2016, Vol 0, Issue 5
Abstract
Purpose. In the paper there are described methods of two and three voltmeter readouts for insulation resistance periodic measurement in live DC and AC/DC IT networks. A new measuring method for AC/DC networks is proposed. Application of a novel algorithm for shortening of measurement cycle is explained. Methodology. All methods of two and three voltmeter readouts consist in connection of a resistor and measurement of mean value of network’s fixed point-to-ground voltages. Results. A new algorithm implemented in KDZ-3 device enables determination of steady-state voltage of a DC network’s pole much faster than in other exploited systems. Originality. In author’s modification of two voltmeter readouts method, line-to-ground voltage mean value is measured at AC side of AC/DC network. This innovation has not been applied for implementation of periodic insulation monitoring in AC/DC IT networks yet. Practical value. The use of author’s innovation will allow to execute measurements at AC side of AC/DC IT networks which might be necessary if rectifier’s output circuits are unavailable. Shortening of measurement cycle duration of two or three voltmeter readouts method’s is of great importance in networks with high capacitance.
Authors and Affiliations
Piotr Olszowiec
Keywords
Related Articles
- EP ID EP297740
- DOI 10.20998/2074-272X.2016.5.11
- Views 85
- Downloads 0
ANALYSIS OF ELECTROMAGNETIC PROCESSES IN THE SYSTEM «CYLINDRICAL SOLENOID – MASSIVE CONDUCTOR»
Purpose. Defining the key parameters of the inductor geometry, as a long multi-turn solenoid, that influence on the current amplitude induced excited in a massive conductor with a flat boundary surface. Methodology. Perf...
CONTROL SYSTEM FOR MULTILEVEL INVERTOR OF SOLAR POWER STATION
Purpose. The development of control law for network multilevel invertor of solar power station and design device for control law realization. Methodology. At synthesis of control law theory of automatic control, power ne...
ANALYSIS OF THERMAL STATE OF TRACTION BRUSHLESS PERMANENT MOTOR FOR MINE ELECTRIC LOCOMOTIVE
Purpose. The study was conducted to analyze thermal state of the traction permanent magnet synchronous motor for mine electric battery locomotive when operating in continuous and short-time duty modes. These operating mo...
INVESTIGATION OF A THREE-PHASE-SINGLE-PHASE INDUCTION ELECTRIC DRIVE UNDER STOCHASTIC LOADS
A control system for a three-phase-single- phase induction electric drive with a controlled phase-shifting module is developed and studied to result in a symmetric regime under stochastic load variations.
INVESTIGATION AND CALCULATION OF VALLEYS OF OUTGOING FROM SUBSTATION GROUNDING CONDUCTORS FOR SHORT-CIRCUIT IN SINGLE-PHASE SHORT OF ELECTRICAL GRID
Introduction. Earthing device electrical substation in modern conditions must meet both the requirements of electrical safety of people and animals, as well as electromagnetic compatibility requirements established her e...