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Given the lack of manufacturers for such transformers on the market, we design them in - house. We provide technical specs to partners, specifying materials like high - temp enameled wires.Electrical signals from downhole logging tools, transmitted via these transformers, impact formation - to - surface signal reliability. Thus, improving transformer consistency boosts signal uniformity, enhancing logging tool accuracy and our market competitiveness.Our common signal transformers are EI - type,

1 Hardware Design of Tester Power SupplyThis device uses a standard small - signal generating device to generate small - current signals with the required frequency and phase angle. Then, through the amplifying circuit and phase - modulating circuit, the working power supply is generated.1.1 Power Frequency Sine Wave Small - Current Signal Generating DeviceThe sine wave generating circuit is mainly composed of the waveform generating chip MAX038 produced by MAXIM Corporation of the United States

Reactors are key for reactive power compensation in power systems, with magnetically controlled reactors as a research focus. A smart grid, upgrading the traditional one via advanced tech, boosts safety and reliability, raising demands for controllable reactors. Thus, developing new - type ones matters. This paper, combining practice, explores their structural design and application to drive innovation and enhance smart grid construction.1 Functions and Application Status of Controllable Reactor

1 Overview of EMC Performance of Electronic Voltage Transformers1.1 Definition & Requirements of EMCElectromagnetic Compatibility (EMC) denotes a device/system’s ability to operate undisturbed in a given electromagnetic environment and avoid causing unacceptable electromagnetic interference to other entities. For electronic voltage transformers, EMC demands stable measurement performance in complex settings, without interfering with other devices. Their EMC performance must be fact

Traditional power transformers face inherent issues due to their sensors. Critically, they are vital for power plant monitoring, control, and protection (e.g., fault recording, safety control). However, large electrical energy transmission via information carriers and the lack of digital signal output from digital systems complicate secondary communication. Complex secondary wiring compensates for microcomputers’ high reliability, streamlining protection and secondary devices. This inn

1 Measurement Principle of Combined Electronic Transformers1.1 Voltage Measurement PrincipleElectronic transformers measure voltage using the capacitive voltage division method. Since the voltage across a capacitor cannot change abruptly, the secondary voltage obtained directly through capacitive voltage division has poor transient response and low measurement accuracy. To improve the measurement accuracy, a precision sampling resistor is connected in parallel across the low-voltage capacitor. I

This paper analyzes the above situation in - depth and summarizes technical measures to solve the problems.1. Main Problems of SPD Products in Voltage Transformer Secondary CircuitsCurrently, there are residual - current - free SPDs (switch - type lightning arresters) at home and abroad. Their main internal discharge circuits use discharge tubes/gaps, with high discharge current capacity (exceeding zinc oxide varistors). However, they have fatal flaws: poor voltage - limiting, arc - pulling volt

1. Overview of Components and IssuesTA (low-voltage current transformer) and electric energy meters are key components of low-voltage electric energy metering. The load current of such meters is no less than 60A. Electric energy meters vary in type, model, and anti-DC performance, and are connected in series in the metering device. Due to the lack of anti-DC capability, they suffer from metering errors under DC component loads, usually caused by non-linear loads. With the increasing use of DC or

1. Innovation BackgroundWith the progress of society and economic development, the electricity demand of power users is expanding increasingly. Lawbreakers, aiming to save electricity costs and pursue high profits, gradually use high - tech methods to steal electricity, causing huge economic losses to power supply enterprises. Currently, popular electricity theft methods in the market include illegally opening the wiring cover of low - voltage transformers in electric energy metering boxes, alte

I. Key Elements of Mechanical Structure DesignThe mechanical structure design of AIS voltage transformers ensures long - term stable operation. For 66 kV outdoor AIS voltage transformers (pillar - type structure): Pillar Material: Use epoxy resin casting + metal frame for mechanical strength, pollution/weather resistance. Special design needed for 66 kV (vs 35 kV & below). Dry - type insulation (porcelain/epoxy shell) requires sufficient bending/impact resistance for harsh outdoors. Heat Dis