This study was designed to examine the effect of adrenal steroid hormones on the response of the toad bladder to vasopressin. Aldosterone enhanced the short-circuit current response, the osmotic water flow response, and the urea permeability response to vasopressin. Since aldosterone also enhanced the short-circuit current response and the osmotic water flow response to adenosine 3',5'-monophos...

KEYWORDS analog circuit – fault diagnosis – test vector –tolerance –test node – multifrequency-modified nodal analysis ABSTRACT A method to identify and select test points for analog circuit testing and to detect multiple soft faults in linear analog circuits using multiple frequency measurements is proposed in this paper. Modified nodal analysis (MNA) method is used to simulate the circuit und...

The development of traditional vehicles which consume fossil carbon-based fuels is constrained by environmental pollution and the energy crisis, it has become a social consensus to develop electric with new resources low emissions. drive system should be able reliably operate over long period. When short-circuit fault occurs in driving motor, current winding will increase sharply threaten safet...

In earlier Fault Analysis (FA) has been exploited for several aspects of analog testing. These include, test development, DfT schemes qualification and fault grading. In present, I testing has become a widely DDQ accepted defect detection technique in CMOS ICs.In this paper we described I testing technique for DDQ analyzing physical faults. A two stage CMOS opamp is taken as Circuit Under Test ...

In this paper, short circuit analysis, based on the electromagnetic transient program (EMTP), has been used to investigate the behavior of the DC reactor type FCL installed in an electrical distribution grid. System studies show that the DC reactor type FCL can not only limit the fault current to an acceptable value, but also can mitigate the voltage sag. A DC reactor type fault current limiter...

Transformer fault diagnosis and repair is a complex task that includes many possible types of faults and demands special trained personnel. In this paper, Petri Nets are used for the simulation of transformer fault diagnosis process and the definition of the actions followed to repair the transformer. An oil thermometer and a Buchholz relay are used for transformer fault detection. Simulation r...

Internal Turn-Turn faults (TTF) are the most common failures in power transformers, which could seriously reduce their life expectancy. Although common protection schemes such as current-baseddifferential protection are able to detect some of the internal faults, some other minor ones (such as TTFs andshort circuit near the neutral point) cannot be detected by such schemes. Likewise, these rela...

Abstract With the continuous growth of load and enhancement grid structure, problem excessive short circuit current has become a key factor affecting safe operation China Southern Power Grid. The comparison measured data shows that calculation results Grid are optimistic based on existing method. It brings difficulties to arrangement power mode. This paper first briefly introduces principle IEC...

We describe a concept for circuit protection and fault current limitation in DC power systems based on the use of solid-state power switches. The approach could be useful in the increasingly widespread application of DC power distribution networks. During normal operation the power switch is always “on”. During faults, the gate of the solid-state switch is pulse modulated to prevent the circuit...

Protection systems have vital role in network reliability in short circuit mode and proper operating for relays. Current transformer often in transient and saturation under short circuit mode causes mal-operation of relays which will have undesirable effects. Therefore, proper and quick identification of Current transformer saturation is so important. In this paper, an Artificial Neural Network...