東京精電 List of Products and Services

The "High Voltage Oil-Filled Instrument Transformer" is a voltage transformer (VT) capable of measuring high voltages of 110kV. The frequency is 50/60Hz, and the weight is approximately 620kg. It complies with JIS C1731-2. 【Features】 ■ Capable of measuring 110kV high voltage ■ Complies with JIS C1731-2 ■ Compliance standard: JIS C1731-2 ■ Primary voltage: 110kV ■ Secondary voltage: 110V ■ Rated burden: 10VA *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "CT-90M" is a high-precision large CT based on JIS standards. The insulation method involves full molding with epoxy resin, making it a highly reliable current transformer that demonstrates exceptional strength in electrical properties, mechanical properties, weather resistance, humidity resistance, and chemical resistance. By adopting a directional ring core with good magnetization characteristics, it excels in error characteristics and is suitable for applications that measure large currents flowing through copper bars when integrated into large equipment. 【Features】 ■ Excellent error characteristics due to the adoption of a directional ring core with good magnetization characteristics ■ Demonstrates exceptional strength in electrical properties, mechanical properties, weather resistance, humidity resistance, and chemical resistance ■ Suitable for applications that measure large currents flowing through copper bars when integrated into large equipment *For more details, please refer to the PDF document or feel free to contact us.

• Other electronic parts

There are various connection methods for three-phase transformers, but I will introduce the four basic types among them. Starting with the "Y-Δ (Wye-Delta) method," which is mainly used as a step-down transformer, there are also the "Δ-Δ (Delta-Delta) method" and the "Δ-Y (Delta-Wye) method," as well as the "Y-Y (Wye-Wye) method," which are primarily used in circuits requiring high current. 【Lineup】 ■ Y-Δ (Wye-Delta) method ■ Δ-Δ (Delta-Delta) method ■ Δ-Y (Delta-Wye) method ■ Y-Y (Wye-Wye) method *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "Leakage Transformer" is a product that incorporates inductance into the transformer. It has the characteristic that when current flows on the secondary side, the secondary voltage drops sharply, preventing excessive secondary current by lowering the voltage. It is used in applications where the no-load voltage is high and there is a need to reduce the voltage when current flows, such as in arc welding machines, stabilizers for discharge lamps, and electric fences (related to livestock). 【Features】 ■ Used in applications such as arc welding machines, stabilizers for discharge lamps, and electric fences (related to livestock) where the no-load voltage is high and there is a need to lower the voltage when current flows. ■ When a reactor is connected in series on the secondary side of a conventional transformer, replacing it with this product eliminates the need for a reactor, reducing costs. ■ Can be designed and manufactured with any percentage reactance (%X) for both single-phase and three-phase systems. *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "high-frequency reactor" is used in DCAC inverters and DCDC converters and is also referred to as a power inductor. By selecting the appropriate core based on frequency bands, low loss is achieved. The winding adopts a vertical winding with good high-frequency characteristics, allowing for excellent heat dissipation and miniaturization. We manufacture reactors with current values and inductance values tailored to customer requirements. As standard products, we also offer immediate delivery of the TSL series, which has excellent DC superimposition characteristics. 【Features】 ■ Appropriate cores are selected based on frequency bands to achieve low loss ■ The winding employs a vertical winding with good high-frequency characteristics, enabling excellent heat dissipation and miniaturization ■ Molded types can also be produced by encapsulating in an aluminum case and molding with a high thermal conductivity resin, achieving high heat dissipation *For more details, please refer to the PDF document or feel free to contact us.

• Other electronic parts

The "Surge Cut Transformer for Communication/Broadcasting" is used to prevent or mitigate damage to electronic devices caused by abnormal voltage that enters through the power line. By using this device, it is possible to prevent or reduce damage from the power supply. The surge transfer rate of this transformer is below -40dB (1/100) in common mode. It can be manufactured according to specifications for single-phase, three-phase, and voltage. 【Features】 ■ Prevents or mitigates damage from the power supply ■ Can be manufactured according to specifications for single-phase, three-phase, and voltage ■ The surge transfer rate of this transformer is below -40dB (1/100) in common mode *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "Multi-Power Supply (Three-Phase + Reverse V Transformer)" is a power transformer that can output three-phase power from a three-phase input, as well as single-phase 100V. Even when integrated into equipment, it provides single-phase 100V, making it convenient for use with measuring instruments and other devices. Circuit breakers are included on both the input and output sides, allowing for safe use. Additionally, even in factories where only three-phase 200V is available, this product enables the provision of a single-phase 100V power supply. 【Features】 ■ Capable of outputting three-phase power from a three-phase input and single-phase 100V ■ Convenient for use with measuring instruments due to the availability of single-phase 100V ■ Safe to use with circuit breakers on both the input and output sides ■ Enables the provision of a single-phase 100V power supply even in factories with only three-phase 200V ■ Easy to move with attached casters *For more details, please refer to the PDF document or feel free to contact us.

• transformer

We introduce our specially manufactured "Voltage Transformers (VT)" and "Current Transformers (CT)." These devices convert high voltage and large current into measurable voltage and current that can be read by digital multimeters and other instruments. We can produce CTs for high voltage circuits, VTs for three-phase systems, and VTs and CTs without the hassle of primary side tap switching. We can design and manufacture for general measurement (accuracy class 0.5 to 3.0) and standard use (accuracy class 0.1 to 0.2). (Manufacturing with a ratio error of 0.05% is also possible.) 【Features】 ■ Converts high voltage and large current into measurable voltage and current for digital multimeters and other instruments ■ Capable of producing CTs for high voltage circuits and VTs for three-phase systems without the hassle of primary side tap switching ■ Design and manufacture for general measurement (accuracy class 0.5 to 3.0) and standard use (accuracy class 0.1 to 0.2) are possible *For more details, please refer to the PDF document or feel free to contact us.

• Other electronic parts

The "ring-shaped air-core reactor" has a structure without an iron core inside the winding and is used in high-frequency reactors, etc. Since there is no magnetic saturation of the iron core, the inductance value does not change even when exceeding the rated current. Additionally, the frequency characteristics are also good. It is used in cases where high-frequency iron loss becomes a problem. 【Features】 ■ Structure without an iron core inside the winding ■ Used in high-frequency reactors, etc. ■ Inductance value does not change even when exceeding the rated current due to the absence of magnetic saturation of the iron core ■ Good frequency characteristics ■ Used in cases where high-frequency iron loss becomes a problem *For more details, please refer to the PDF document or feel free to contact us.

• Other electronic parts

The "Lightning Surge Transformer" protects equipment from lightning surges that enter through the power line by being installed in the power line. It possesses high impulse withstand characteristics due to its molded coil. Additionally, the surge transfer rate of this transformer is 1/100 when a 10kV voltage is applied. It can be used to protect indoor mobile phone base station power supplies, as well as to prevent equipment damage and operational failure due to lightning surge intrusion in communication equipment, electronic display devices, security systems, and more. 【Features】 ■ High impulse withstand characteristics due to molded coil ■ Surge transfer rate of 1/100 when a 10kV voltage is applied ■ Protection of indoor mobile phone base station power supplies ■ Prevention of equipment damage and operational failure due to lightning surge intrusion in communication equipment, electronic display devices, security systems, etc. *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "Three-Phase Power Transformer with Auxiliary Power Outlet" is a step-up transformer for equipment. It comes with convenient casters for mobility. If insulation is not required, it can be made compact and lightweight by using an autotransformer structure. In addition to the step-up transformer specifications, it is equipped with a total of 8 outlets: five three-phase 200V 30A outlets and three three-phase 200V 20A outlets, each with a breaker for their respective outlet outputs. Furthermore, the specifications for primary and secondary voltage, capacity, etc., can be customized. 【Features】 ■ A total of 8 outlets: five three-phase 200V 30A outlets and three three-phase 200V 20A outlets, each equipped with a breaker for their respective outlet outputs ■ Convenient casters for mobility ■ Compact and lightweight design possible with an autotransformer structure if insulation is not required ■ Specifications for primary and secondary voltage, capacity, etc., can be customized *For more details, please refer to the PDF document or feel free to contact us.

• transformer

In three-phase transformers, there are various connection methods, among which we introduce the special connection known as "special connection transformer." Starting with the "reverse V connection," which allows for a single-phase output circuit from three-phase input, there are also "Scott connection," "V connection," and "zigzag connection," which enable two single-phase output circuits. 【Features】 ■ Reverse V connection: Allows for a single-phase output circuit from three-phase input. ■ Scott connection: Allows for two single-phase output circuits from three-phase input. ■ V connection: A connection method used when obtaining three-phase from two single-phase transformers. ■ Zigzag connection: Mainly used for grounding transformers, allowing for arbitrary phase changes based on the number of winding divisions. *For more details, please refer to the PDF materials or feel free to contact us.

• transformer

The "water-cooled reactor" is encapsulated in an aluminum case to accommodate water cooling, and miniaturization is achieved by molding it with a highly thermally conductive resin. It can also be used by attaching it to forced air cooling fins. Since it is encapsulated in an aluminum case, it has high weather resistance and excellent quietness. By molding with a high thermal conductivity resin, it becomes possible to dissipate more heat than conventional designs, allowing for an increase in copper and iron losses, which enables miniaturization. 【Features】 ■ Miniaturization of the reactor is possible by designing with increased copper and iron losses. ■ Cooling plates can also be manufactured by our company. ■ High weather resistance and excellent quietness. ■ It can also be used by attaching it to forced air cooling fins. ■ Cooling plates can also be manufactured by our company. *For more details, please refer to the PDF document or feel free to contact us.

• Other electronic parts

The "High Current Transformer" is a transformer capable of generating high currents. It can be customized for various applications. It can also be used for instant testing (instantaneous disconnection testing). By combining it with our voltage regulator on the input side, you can build a system that allows for a wide range of current variability. 【Features】 ■ Capable of generating high currents ■ Customizable for various applications ■ By combining it with our voltage regulator on the input side, you can build a system that allows for a wide range of current variability ■ It is also possible to use three single-phase units together for three-phase applications *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "Equipment Boosting Power Supply Transformer" is a boosting transformer designed for using export-spec machine tools and similar equipment with domestic power sources. It comes with convenient casters for easy mobility. You can use it domestically without modifying the voltage specifications of export machine tools. Additionally, if insulation is not required, it can be configured as an autotransformer, allowing for a more compact and lightweight design. The bottom part has no openings such as vents to prevent dust intrusion. 【Features】 ■ Can be used domestically without modifying the voltage specifications of export machine tools ■ Convenient casters for easy mobility ■ Can be configured as an autotransformer for compactness and lightweight design if insulation is not required ■ The bottom part has no openings such as vents to prevent dust intrusion ■ Primary and secondary voltage, capacity, and other specifications can be customized according to customer requirements *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "switching transformer" has a special winding method and is tailored to specifications. The usage circuits include flyback, forward, push-pull, and full-bridge methods. Our company designs and manufactures transformers suitable for various circuit methods. 【Features】 ■ Special winding method tailored to specifications ■ Usage circuits - Flyback method, forward method, push-pull method, full-bridge method ■ Transformers designed and manufactured to suit various circuit methods *For more details, please refer to the PDF document or feel free to contact us.

• transformer

"Auto transformer" is also referred to as a single-winding transformer. In a multi-winding transformer, the primary and secondary sides are wound separately and are insulated from each other, whereas in a single-winding transformer, the primary and secondary sides use the same winding and are not insulated. Since the same winding is used, it can be made smaller and lighter compared to a multi-winding transformer. 【Features】 ■ Also referred to as a single-winding transformer ■ Uses the same winding for the primary and secondary sides ■ Not insulated ■ Can be made smaller and lighter compared to a multi-winding transformer *For more details, please refer to the PDF document or feel free to contact us.

• transformer

The "High-Frequency Transformer" is a large-capacity insulated transformer designed for high frequencies. It contributes to the miniaturization of various systems. It has a proven track record of handling capacities up to 80 kVA and frequencies up to 30 kHz. This product can be used for step-up and step-down applications in various insulated DC/DC converters. We can design and manufacture it according to your specific needs, so please feel free to contact us. 【Features】 ■ Supports high frequencies ■ Contributes to the miniaturization of various systems ■ Proven track record of handling capacities up to 80 kVA and frequencies up to 30 kHz ■ Forced air cooling with a fan during use ■ Custom design and manufacturing available to meet customer applications *For more details, please refer to the PDF document or feel free to contact us.

• transformer

This device is a load resistor that incorporates a power resistor. Current settings can be achieved by inputting 10 NFBs. It is designed for continuous rated specifications. Additionally, it can be used for actual load evaluation of the DC section of inverters and converters, as well as for discharging the DC section. It is equipped with casters for easy movement and operates on a natural air cooling system, so there is no noise from fans. 【Features】 ■ Load resistor with built-in power resistor ■ Easy to move due to the casters ■ No fan noise due to the natural air cooling system ■ Current settings possible by inputting 10 NFBs ■ Continuous rated specifications *For more details, please refer to the PDF document or feel free to contact us.

• Electronic Load Unit

This product is a resistor used to measure circuit current and current waveforms in electrical circuits. Recently, it has been widely used as a sensor to send measurement values to digital panel meters and control circuits through detection circuits/converters, and it is a method to detect and measure the voltage generated by the resistance of the shunt. Since it is inserted in series into the circuit, it is necessary to keep the resistance value as small as possible (below a few mΩ) to minimize the impact on circuit operation. 【Features】 ■ Used to measure circuit current and current waveforms in electrical circuits ■ Recently, it has been widely used as a sensor to send measurement values to digital panel meters and control circuits through detection circuits/converters ■ A method to detect and measure the voltage generated by the resistance of the shunt ■ Our company can accommodate a wide range of current values from 1A to 10000A class ■ Voltage drops can also be customized to specifications such as 50mV, 100mV, and accuracy of 0.1% to 0.5% * For more details, please refer to the PDF document or feel free to contact us.

• Resistors

The device is a high-capacity load device capable of testing single-phase and three-phase systems. The test voltage can be manufactured according to specifications for both single-phase and three-phase as required. Furthermore, leveraging our transformer technology, it can accommodate several types of test voltages with a single unit. Due to its high capacity and selectable voltage, it is also suitable as a load for generators. 【Features】 ■ High-capacity load device capable of testing single-phase and three-phase systems ■ Test voltage can be manufactured according to specifications for both single-phase and three-phase ■ Utilizing our transformer technology, it can handle multiple test voltages with one unit ■ Loads suitable for each test capacity can be selected using a lighted push-button switch (Example of capacity selection range: 55kW Max for three-phase, 45kW Max for single-phase) ■ Suitable as a load for generators due to its high capacity and selectable voltage *For more details, please refer to the PDF document or feel free to contact us.

• Electronic Load Unit

This coil can achieve test results equivalent to those obtained when passing a large current with a small current during clamp meter testing. Since it is made solely of copper wire, it is very inexpensive and can be produced in a short lead time. The number of coil turns and dimensions can also be changed. Additionally, the section that passes through the clamp is straight, which increases the occupancy rate. 【Features】 - Made solely of copper wire, making it very inexpensive and able to be produced in a short lead time. - The number of coil turns and dimensions can be changed. - By passing multiple turns of the coil through the clamp, it gains ampere-turns (AT), allowing tests similar to those conducted with a large current even with a small current. - The section that passes through the clamp is straight, increasing the occupancy rate. *For more details, please refer to the PDF document or feel free to contact us.

• Testing Equipment and Devices

This device is a load resistor for a 10kHz high-frequency inverter. It uses a non-inductive resistor and has a structure with minimal inductance in the internal wiring, targeting an inductance value of 0.15μH. In addition to load devices, we also manufacture power supply units and can provide design and production that systematizes the entire device. 【Features】 ■ Load resistor for 10kHz high-frequency inverters ■ Uses non-inductive resistors and has a structure with minimal inductance in the internal wiring ■ Target inductance value of 0.15μH ■ Capable of design and production that systematizes the entire device *For more details, please refer to the PDF document or feel free to contact us.

• Electronic Load Unit

This product contains a diode in the case to prevent current from flowing back from connected devices, such as lithium batteries and other batteries. It incorporates a rectifier diode in the box with a heat sink, preventing backflow by placing it between the battery and the DC power supply. We can customize it to accommodate the voltage and current of your testing equipment or DC power supply. 【Features】 ■ Incorporates a rectifier diode in the box with a heat sink ■ Prevents backflow by placing it between the battery and the DC power supply ■ Customizable to accommodate the voltage and current of your testing equipment or DC power supply *For more details, please refer to the PDF document or feel free to contact us.

• Other FA equipment

The device is a three-phase load device for grid connection testing. It allows for the selection of resistive loads, inductive loads, and capacitive loads. It has a proven track record for load testing applications such as grid connection, solar power inverters, and battery systems. Additionally, we manufacture not only load devices but also power supply devices, and we can also provide design and manufacturing services for systematizing the entire device. 【Features】 ■ Three-phase load device for grid connection testing ■ Ability to select resistive loads, inductive loads, and capacitive loads ■ Proven track record for load testing applications such as grid connection, solar power inverters, and battery systems ■ Design and manufacturing services for systematizing the entire device *For more details, please refer to the PDF materials or feel free to contact us.

• Electronic Load Unit

This device is used in research aimed at energy saving in large-scale data centers and simulates the heat generation of servers and similar equipment. It converts heat from a commercial 100V input through a resistive load (heater). Additionally, by setting the heater power and fan current, it is possible to change the amount of heat generated and the airflow. It measures and displays the heater current, fan current, and intake and exhaust temperatures. 【Features】 - Used in research aimed at energy saving in large-scale data centers - Converts heat from a commercial 100V input through a resistive load (heater) - Allows changes in heat generation and airflow by setting heater power and fan current - Measures and displays heater current, fan current, and intake and exhaust temperatures - Enables remote settings and temperature information retrieval via LAN connection - Uses the same SNMP protocol as servers for settings and data retrieval *For more details, please refer to the PDF document or feel free to contact us.

• Other FA equipment

This device is a load apparatus that conducts external short-circuit tests as part of the safety evaluation of lithium-ion batteries and other secondary batteries. It consists of a resistance for short-circuiting, a resistance value switching relay, a short-circuit relay, and a control unit. Cooling is achieved through a forced air cooling method, drawing in air from the bottom and exhausting it from the top, combined with a built-in chamber for the testing environment. 【Features】 - Capable of selecting resistances from 10mΩ to 150mΩ (in 10Ω steps) for testing. - Equipped with a fine-tuning variable resistor that can adjust from 0.5mΩ to 15mΩ (in 0.5mΩ steps). - Various contact signals are provided, allowing for measurement during testing by connecting measuring instruments. - Capable of conducting tests according to standards such as UL1642 and JISC8712:2006, 4.3.2. - Customizable electrical specifications and dimensions according to customer requirements. - By arranging and combining resistors in different ways, products can be provided that are longer in the depth direction based on the actual dimensions. *For more details, please refer to the PDF document or feel free to contact us.

• Electronic Load Unit

This device allows for evaluation tests close to real-world conditions without the need to mount SiC semiconductors or devices used in combination with SiC semiconductors onto actual equipment. Under conditions similar to those of actual equipment installation, it is possible to verify waveforms using various measuring instruments for loss, heat generation, noise, and durability. Additionally, due to its regenerative function, it enables large-capacity testing with low power consumption. It can also be applied to testing devices for automotive reactors, IGBTs, and IPMs other than SiC semiconductors. 【Features】 - Enables evaluation tests close to real-world conditions without mounting devices used in combination with SiC semiconductors onto actual equipment. - Allows verification of waveforms for loss, heat generation, noise, and durability using various measuring instruments under conditions similar to actual equipment installation. - Achieves large-capacity testing with low power consumption due to its regenerative function. - Can also be applied to testing devices for automotive reactors, IGBTs, and IPMs other than SiC semiconductors. *For more details, please refer to the PDF document or feel free to contact us.

• Testing Equipment and Devices

This product is a testing device that applies voltage to insulating materials and evaluates the breakdown value of the insulating material. It can continuously apply a constant voltage or evaluate the breakdown value by increasing the voltage at a constant rate. It can be manufactured according to the testing content specified by various standards and criteria, and we will design each tank according to the desired shape for tests in air or oil. 【Features】 - A testing device that applies voltage to insulating materials and evaluates the breakdown value of the insulating materials. - Capable of continuously applying a constant voltage or evaluating the breakdown value by increasing the voltage at a constant rate. - Can be manufactured according to the testing content specified by various standards and criteria (such as JIS-C2110). - Electrodes can be produced to match the shape of the insulating materials (film, sheet, wire, etc.). - Has a proven track record in insulation breakdown testing of wires (polyester fibers, enamel fibers, glass fibers, meta-aramid fibers, etc.). *For more details, please refer to the PDF document or feel free to contact us.

• Testing Equipment and Devices

Devices that are used connected to a commercial power supply system generate harmonic currents on the system side, and thus limits are established for these currents. This device is used to measure the harmonic leakage current and serves as the line impedance. It is connected and used between the grid simulation power supply and the device under test. The resistance and inductance values comply with JIS C61000-3-2. By adopting an air-core reactor, the variation in inductance in the high-frequency range is minimized, and it is capable of handling large currents to comply with the "grid connection regulations," which are the standards for grid-connected inverters such as power conditioners. 【Features】 ■ Used connected between the grid simulation power supply and the device under test ■ Resistance and inductance values comply with JIS C61000-3-2 ■ Adoption of an air-core reactor minimizes inductance variation in the high-frequency range ■ Capable of handling large currents to comply with the "grid connection regulations" for grid-connected inverters such as power conditioners *For more details, please refer to the PDF document or feel free to contact us.

• Other inspection equipment and devices

The device is a tester for conducting breakdown tests on wires and insulating materials. It increases voltage at a constant speed and holds the display of the voltage at the time of insulation breakdown. After reaching the set voltage, it can start a timer, allowing it to function as a dielectric strength tester as well. Additionally, we have a track record of producing products equipped with features such as constant temperature chambers and simultaneous testing capabilities for three circuits. Output current, voltage, and rise speed can be customized, so please feel free to contact us. 【Features】 ■ Tester for conducting breakdown tests on wires and insulating materials ■ Increases voltage at a constant speed and holds the display of the voltage at the time of insulation breakdown ■ Can start a timer after reaching the set voltage, allowing it to function as a dielectric strength tester ■ Customizable output current, voltage, and rise speed *For more details, please refer to the PDF materials or feel free to contact us.

• Testing Equipment and Devices

This device is a power transformer that has miniaturized our standard power transformer (TSS series) and achieved cost reduction. It is designed to meet the voltage and current specifications of our customers, and it can also accommodate requests for shielding, casing, and special shapes. Products comply with JEC1333 standards (TSH1-E series) and JEC2200 standards (TSH1-H, TSH3-H series). 【Features】 ■ Miniaturized our standard power transformer (TSS series) and achieved cost reduction ■ Complies with JEC1333 standards (TSH1-E series) ■ Complies with JEC2200 standards (TSH1-H, TSH3-H series) ■ Designed to meet customer voltage and current specifications (output voltage is specified at rated load) ■ Can accommodate requests for shielding, casing, and special shapes *For more details, please refer to the PDF materials or feel free to contact us.

• Transformers

The device is an AC high current power supply using thyristor phase angle control. It has a proven capability of 3000A, and the transformer can be either built-in or separate. The input is single-phase two-wire, and it is possible to provide two output circuits. The standard mode is constant voltage control, but it can also support effective value detection for constant current control. 【Features】 ■ Thyristor phase angle control method ■ Proven capability of 3000A ■ Transformer can be built-in or separate ■ Input is single-phase two-wire ■ Two output circuits can be provided *For more details, please refer to the PDF document or feel free to contact us.

• power supply

This product is a noise filter that uses an amorphous core, which can be utilized in various situations for noise reduction. Compared to ferrite of the same dimensions, it achieves a higher impedance, effectively attenuating noise. It can be used for applications such as reducing noise propagation from inverter inputs to lines, as well as in common mode choke coils for noise filters. 【Features】 ■ High inductance is achieved with fewer turns ■ High noise attenuation characteristics over a wide frequency range up to several tens of MHz ■ High saturation magnetic flux density, about three times that of general ferrite cores ■ Less prone to resonance like ferrite cores, suppressing the rise of high dv/dt waveforms *For more details, please refer to the PDF document or feel free to contact us.

• filter

The "Induction Dielectric Strength Tester" is an induction dielectric strength tester that can vary the output frequency from 50 to 400 Hz. It is capable of testing the insulation strength between the windings of transformers, between winding layers, between turns, and between terminals. It has a pass/fail judgment function that allows you to set upper and lower limits for current values and a timer function. The voltage compare function ensures that testing does not begin until the output voltage set by the voltage adjustment knob falls within ±3% of the reference voltage value, allowing for accurate testing. 【Features】 ■ Pass/fail judgment function ■ Timer function ■ Voltage compare function ■ Equipped with RS-232C interface ■ Customizable options available *For more details, please refer to the PDF document or feel free to contact us.

• Voltage Meter

The "Induced Dielectric Strength Tester" is a testing device used to evaluate the insulation strength between windings and layers of transformers and similar equipment. The induced dielectric strength test applies high voltage at a frequency higher than the rated frequency to prevent excessive no-load current. The "High-Frequency Dielectric Strength Tester" can apply even higher frequencies. It can be used for accelerated testing of insulation performance in motor windings and induction heating coils, as well as serving as a high-frequency output power source. Similar to the dielectric strength tester, it allows for the setting of test duration and cutoff current. 【Product Lineup】 ■ Induced Dielectric Strength Tester - Inverter power supply type - Linear amplifier power supply type ■ High-Frequency Dielectric Strength Tester - Linear amplifier power supply type *For more details, please refer to the PDF document or feel free to contact us.

• Voltage Meter

The "DC/AC High Voltage Tester" is a testing device that can perform both DC voltage tests and AC voltage tests. This device can be used for low-voltage turn-on tests of thyristor modules within power conversion devices. The output polarity of the DC can be switched. The trip current settings can be configured separately for the DC side and the AC side. The output voltage is adjusted with a 3kVA slider. 【Features】 ■ Capable of performing DC voltage tests ■ Capable of performing AC voltage tests ■ DC output polarity can be switched ■ Trip current settings can be configured individually *You can check the stock status from the related link.

• Voltage Meter

This is a testing device that corresponds to insulation resistance tests for solar cell modules and fuel cells. It can be used for testing solar cells (modules and arrays) and fuel cells (cells and stacks). [Examples] - Solar cells for a 750kW solar power generation system - Open circuit voltage: 470V - For testing at DC voltage: 470V × 1.5 = 705V *For more details, please refer to the PDF document or feel free to contact us.

• Voltage Meter

The "Insulation Material Tester" is a testing device used to evaluate the properties of insulation materials (such as tracking resistance, arc resistance, and flammability). Tests can be conducted based on standards such as UL, IEC, DIN, ASTM, JIS, and JEC. There are devices for accelerated testing of insulation degradation due to tracking, such as tracking resistance testing equipment; devices for testing flammability using heating wires (such as nichrome wire); and devices for evaluating insulation degradation caused by arc discharge, such as arc resistance testing equipment. This document provides detailed information about each testing device. 【Product Lineup】 ■ Tracking Resistance Testing Equipment ■ Heating Wire Flammability Testing Equipment ■ Arc Resistance Testing Equipment ■ Arc Ignition Resistance Testing Equipment *For more details, please refer to the PDF document or feel free to contact us.

• Voltage Meter

At Tokyo Seiden, we offer a variety of optional items that can be used with the "TWV Series," including various probes for testing, gloves and boots for safe testing, rubber mats, remote boxes for operation from a distance, and jigs for start-up inspections. 【Lineup】 ■Rotating lights ■Safety equipment ■Remote operation ■Test probes ■Test cables ■Inspection jigs *For more details, please refer to the PDF materials or feel free to contact us.

• Voltage Meter

The "Pinhole Tester" is a device that generates stable high DC voltage to conduct dielectric strength tests on the coatings of electrolytic capacitors. It can inspect for holes or scratches in the outer film of the electrolytic capacitor. The test is performed by applying voltage between an electrode that wraps around the outside of the tube and the case of the electrolytic capacitor. It can be turned ON/OFF remotely and comes with an acrylic cover to prevent accidental operation. 【Features】 ■ Generates stable high DC voltage for testing ■ Remote ON/OFF capability ■ Includes an acrylic cover to prevent accidental operation *For more details, please refer to the PDF document or feel free to contact us.

• Testing Equipment and Devices

The "Portable DC Voltage Withstanding Test Device" is an apparatus used for conducting dielectric strength tests on semiconductor rectifiers such as diodes and thyristors. Although it has a DC output, the output voltage waveform is a half-wave rectified waveform of the input voltage waveform. The maximum test voltage is 8kV peak, with a peak value of 8kV. Since the output terminals are floating, grounding either the positive or negative terminal allows for an output of +8kV / -8kV. It features a convenient carrying handle. (A shoulder strap can also be attached.) 【Features】 ■ DC output ■ Maximum test voltage of 8kV peak ■ Peak value of 8kV ■ Convenient carrying handle ■ Shoulder strap can also be attached *For more details, please refer to the PDF document or feel free to contact us.

• Testing Equipment and Devices

The "Inclined Plate Method Tracking Resistance Tester" complies with the contaminated liquid inclined plate method (step-up tracking method) of IEC60587 and is also compatible with the testing of IEC61730-1 (international standard for solar cell modules), allowing for the evaluation of tracking resistance. By using contaminated liquid and an inclined plate test specimen to measure tracking resistance and erosion resistance, it enables the assessment of electrical insulating materials under harsh environmental conditions at commercial frequencies (48-62Hz). 【Features】 ■ Complies with the step-up tracking method ■ Compatible with testing of international standards for solar cell modules ■ Capable of evaluating electrical insulating materials *For more details, please refer to the PDF document or feel free to contact us.

• Testing Equipment and Devices

The "TWV Series" is a series of AC dielectric withstand testers with output voltages up to AC 20kV and capacities up to 2.5kVA, including models with 3kV (30VA), 5kV (500VA), and 10kV (500VA). It can perform dielectric withstand tests and insulation resistance tests similar to the conventional TWV series, featuring functions such as "voltage compare function," "pass/fail judgment function with upper and lower limit settings," and "timer function." Additionally, the TWV series can accommodate output voltages up to AC 100kV and capacities up to 5kVA. *Note: When the dielectric withstand output voltage is 10kV or higher, the output terminals will be separate for dielectric withstand testing and insulation resistance testing. 【Features】 ■ Voltage compare function ■ Pass/fail judgment function with upper and lower limit settings ■ Timer function *For more details, please refer to the PDF materials or feel free to contact us.

• Voltage Meter

Tokyo Seiden's "Sliding Voltage Regulator" is a transformer that can vary the output voltage, consisting of a toroidal transformer, sliding brushes, and a sliding mechanism. By operating the push-button switch on the panel, it is possible to raise or lower the output voltage. The output voltage can be adjusted almost continuously, and there is no waveform distortion. Voltage loss is extremely low, allowing for efficient power control. 【Features】 ■ Output voltage can be adjusted almost continuously ■ No waveform distortion ■ Low voltage loss enables efficient power control ■ No influence from frequency fluctuations ■ Strong against instantaneous overvoltage and overcurrent *For more details, please download the PDF or feel free to contact us.

• power supply