7 results about "Insulation resistance" patented technology

A semiconductor carrier film includes (i) a base film having insulating property, (ii) a barrier layer provided on the base film, the barrier layer including nickel-chrome alloy as a main component, and (iii) a wire layer provided on the barrier layer, the wire layer being made of conductive material including copper, and a ratio of chrome in the barrier layer is 15% to 50% by weight. A semiconductor device is formed by bonding a semiconductor element to the wire layer. The semiconductor carrier film and the semiconductor device are suitable for attaining finer pitches and higher outputs, because insulating resistance between adjacent terminals is less likely to deteriorate then in conventional art even in the environment of high temperature and moisture.

The invention discloses an intelligent monitoring device for temperature and insulation state of a 330KV high-voltage cable in a hydropower station. The device is characterized by being provided with a central processing module unit (CPU), a data acquisition and conversion unit, a light transmitting/receiving module, an alarm output module, a plurality of optical fiber temperature sensors and a plurality of current sensors, wherein the data acquisition and conversion unit is used for transmitting digital signals to the CPU under the control of the CPU; the light transmitting/receiving module is used for transmitting electrical signals to the data acquisition and conversion unit; the alarm output module can be used for communication with a remote monitoring system; the optical fiber temperature sensors are respectively arranged at the joints of the high-voltage cable to be detected and used for connecting temperature detection signals to the light transmitting/receiving module; and thecurrent sensors are respectively arranged on joint metal sheaths of the high-voltage cable to be detected and used for connecting current detection signals to the data acquisition and conversion unit. The device is particularly suitable for safety monitoring of the 330KV high-voltage cable in the hydropower station, can realize real-time monitoring of the temperature and the insulation state of the cable in the hydropower station, and can also ensure self safety.

The invention discloses a method for preparing an ultra-wide temperature stable barium titanate dielectric material by adopting an annealing method. The method comprises the following step: annealing a barium titanate dielectric material obtained by the traditional solid-phase process method at 1,000-1100 DEG C for 1-8 hours to finally obtain the ultra-wide temperature stable barium titanate dielectric material with excellent performance. The stability of the dielectric constant of the barium titanate dielectric material and the dielectric constant of a high-temperature section (150-310 DEG C) is significantly improved; the method has excellent dielectric properties, wherein epsilon r is greater than or equal to 1600, the insulation resistivity is greater than 10<11>ohm.cm, the rate of change of capacitance within a range of -55 DEG C to 310 DEG C, namely delta C/C at 20 DEG C is smaller than or equal to +/-15%, and tan delta is smaller than or equal to 2%.

The invention discloses an efficient insulation electric leakage detection circuit and an insulation electric leakage detection method. The efficient insulation electric leakage detection circuit comprises a high-voltage bus which comprises a positive bus and a negative bus, a battery pack which is connected with one side between the positive bus and the negative bus, a load which is connected with the other side between the positive bus and the negative bus, and an insulation resistor which comprises an inherent insulation resistor Rp1 between the positive bus on the end of the battery pack and the shell ground, an intrinsic insulation resistor Rn1 arranged between the negative bus on the end of the battery pack and the shell ground, an intrinsic insulation resistor Rp2 arranged between the positive bus on the end of the load and the shell ground, and an intrinsic insulation resistor Rn2 arranged between the total negative bus on the end of the load and the shell ground.

The invention method is used to measure insulation resistance and capacitance between two outside lines on telephone, line, and which between each outside line to the ground. The measuring method is to measure ground resistance and capacitance after two outside lines are shortted and to measure ground resistance and capacitance of the outside line which is ungrounded after one outside line being grounded, then to calculate the unmeasured insulation resistance. The measuring device consists of constant-current source, data collecting unit, data processing and controlling unit, switching unit. Said invention method can protect the mutual influences of resistance and capacitance in outside line measuring and realize the outside line measuring with high speed, high precision and low cost.