System and method for detecting turn-to-turn faults in one or more windings of various objects are provided. In one implementation, a fault detector receives a set of current measurements associated with a transformer and uses these measurements to execute a procedure for detecting a turn-to-turn fault in the transformer. The procedure can include dividing a steady-state differential current value by a steady-state voltage value to obtain one or more compensating factors, determining a magnetizing current amplitude indicator by multiplying the steady-state voltage value by the one or more compensating factors, determining a compensated differential current value by combining the steady-state differential current value with a modifier value that incorporates the magnetizing current amplitude indicator, comparing the compensated differential current value against a threshold value, and declaring an occurrence of the turn-to-turn fault in the transformer when the compensated differential current value exceeds the threshold value.

A method and a test device are disclosed for testing a latching magnet of a switch. The switch includes a switching contact; an electronic trip unit to monitor the current flowing and to test whether a current-dependent trip condition is met; an electrical energy store, forming a circuit with the winding of the latching magnet, the circuit being closed by the trip unit when the trip condition is met; an actuator, actuated for a first closing time by closing of the circuit and configured to separate the contact elements; and a first diode, connected in parallel with the winding and via which stored energy of the latching magnet is dissipated. The test device is configured to close the circuit for a second closing time, which is so short that no actuation of the actuator takes place. After the reopening, a test is performed to ascertain whether stored energy is dissipating.

A device for testing a solenoid valve includes: a voltage generator for applying a short pulse of voltage, which is not long enough to open the solenoid valve, to the windings of the solenoid valve; a current meter configured for measuring the current flowing through the windings of the solenoid valve; and an analysis device which is configured for analysing the current measured by the current meter for detecting a potential fault of the solenoid valve.

A diagnostic method for diagnosing a malfunction of a solenoid valve includes: a) storing reference features of a solenoid current waveform, b) detecting features of the solenoid current waveform during operation of the solenoid valve, c) comparing the reference features with the detected features, d) comparing the pressure value of fluid entering the solenoid valve inlet orifice with a predetermined range of pressure values in the event of deviation between the value of the detected features and the value of the reference features, e) adjusting the pressure value and repeating steps b) and c) in the case of deviation of the pressure value with respect to the pressure value range, and f) generating an alarm signal due to malfunction of the solenoid valve in the event of a deviation between the value of the detected features and the value of the reference and fluid pressure features within the pressure value range.

A method for determining a switching state of a valve that is actuated by a coil, wherein the method includes: respectively ascertaining a current flowing through the coil and a voltage applied to the coil at several times which follow one another with a prespecified time interval, calculating an inductance variable of the coil based on the currents, the voltage and the time interval, and determining the switching state based on the inductance variable. Also disclosed is a solenoid valve assembly.

A method for determining a switching state of a valve, an inductance variable being determined on the basis of current and voltage measurements and the switching state being determined on the basis of the inductance variable. Also disclosed is a solenoid valve assembly for carrying out such a method.

A method for preparing a transmission of energy to a vehicle by an inductive charging system, which has a base plate arranged on a primary side of the charging system and a secondary side arranged in or on the vehicle. A first coil is provided in the base plate and a second coil is provided on the secondary side in a vehicle plate. The method includes energizing the second coil provided on the secondary side from a vehicle-based power source and diagnosing the functionality of components arranged on the secondary side of the inductive charging system by evaluating the energization carried out on the secondary side of the inductive charging system. Also disclosed is a device for preparing a transmission of energy to a vehicle by an inductive charging system.

A method for preparing a transmission of energy to a vehicle by an inductive charging system, which has a base plate arranged on a primary side of the charging system and a secondary side arranged in or on the vehicle. A first coil is provided in the base plate and a second coil is provided on the secondary side in a vehicle plate. The method includes energizing the second coil provided on the secondary side from a vehicle-based power source and diagnosing the functionality of components arranged on the secondary side of the inductive charging system by evaluating the energization carried out on the secondary side of the inductive charging system. Also disclosed is a device for preparing a transmission of energy to a vehicle by an inductive charging system.

The present disclosure relates to a device for testing insulation properties of a transformer, comprising: a low-voltage winding part and a high-voltage winding part that are arranged concentrically with each other; an iron core for testing combined with the low-voltage winding part and the high-voltage winding part and adjustable in height according to the height of low-voltage winding part and the high-voltage winding part; a low-voltage terminal part connected to both ends of the winding of the low-voltage winding part; a high-voltage terminal part connected to both ends of the winding of the high-voltage winding part.

Disclosed is a diagnostic apparatus structured to be electrically connected with a coil stack of a drive mechanism of a control device of a nuclear reactor. The coil stack has a plurality of coils. The diagnostic apparatus includes a power supply and a controller including a processor and a memory that stores a number of routines including a number of instructions. When executed on the processor the instructions cause the diagnostic apparatus to apply to a coil a voltage that varies as a function of time, detect a current in the coil as a function of time, identify in the current a first inflection point and a second inflection point, and determine, based upon an electronic evaluation that includes the first inflection point and the second inflection point, that the coil is one of functioning properly and in a state of at least partial failure.