Features

• Our standard epoxy casting molded transformers are available in the following configurations:
  • Low-voltage single-phase: 50VA to 30kVA.
  • Low-voltage three-phase: 5 to 50kVA.
  • High-voltage single-phase: 3 to 30kVA.
  • High-voltage three-phase: 5 to 50kVA.
• Low-voltage molded transformers that do not use casting molds are available on a made-to-order basis.

◆ Single-phase, three-phase, high-pressure mold transformer

◆ET-7KL/ETT-10KL

• Wiring Diagram

◆ET-20KE/ETT-10KE

• Wiring Diagram

Features

• A low-loss amorphous iron core is utilized, and foil-wound coils or Litz wire are used for the windings.
• The primary objective is to achieve a compact size and low loss, while the finite element method is also experimented with.
• This method is explored in order to further reduce stray load losses, with those due to DC resistance being excluded and passive components being used to enhance performance.

Features

Features

• There is a wide selection of power supplies designed to meet various needs, including single-phase and three-phase configurations.
• It includes Scott connection, reverse V connection, staggered connection, and both indoor and outdoor enclosures

Specifications

◆Single-phase, low-voltage operation transformer (Type E, Type B)

• Wiring diagram

◆Dry type E series

◆Dry type B series

◆Iron plate case included

◆ Single-phase, low-voltage transformer (Type B, Type H)

• Wiring diagram

◆Three-phase, low-voltage transformer (Type A, Type B, Type H)

• Wiring diagram

◆Scott connection transformer (Type B, Type H)

• Wiring diagram

◆Inverse V connection transformer (Type B, Type H)

• Wiring diagram

Features

• Low-voltage through-type transformers are available in resin cases or as resin-molded products.
• This series has a very compact structure, allowing for the integration of multiple units into a single unit.
• We also offer various other types, including composite current transformers, auxiliary current transformers, and IEC standard products.

◆Round Through Type Current Transformer

◆Square Through Type Current Transformer

◆CW30-15L/CW30-40L/CW40-40L

◆EC110-40LS/EC160-40LS

◆CW55-40LSB/CW80-40LSB

◆CW55-40LS/CW80-40LS

◆EC-40LS

Features

• For low-voltage applications, we offer two types: dry type and resin-molded type.
• The VSE-YF series with fuse clips features a compact resin terminal base.
• The terminal connection and fuse holder are molded as one piece.
• It comes standard with a protective cover that covers the entire unit.

Standard Specifications

◆PSE-15M/VSE-15YF/EPSA-50L

◆PSE-15M~PSE-200M

◆VSE-15YF~VSE-200YF

◆EPSA-15L~EPSA-500L

Features

• This product combines the functions of both a starting transformer and a reactor.
• It is especially effective when used with low power capacity systems.
• It is also suitable when a small-capacity generator is used as the power source, such as in emergency drainage pump trucks.
• Its characteristics help reduce power current and enable smoother starting.

Features

• This product is a molded version of the AT-W type.
• It overcomes the problem of core saturation when the neutral point is open.
• The coil section, molded with epoxy resin, has excellent characteristics.
• Additionally, the legs also use a circular wound iron core, just like the AT-W type.

Features

• It is designed to prevent open-circuit voltage at the neutral point.
• Our proprietary core structure prevents the core from saturating, even when the neutral point is open.
• Conventional products operate on the same principle as the secondary circuit of a current transformer when the neutral point is open.
• In contrast, this series operates purely as a reactor.
• Specifications

◆AT-311W~AT-310WK / AT-611W~AT-610WK

◆AT-314WK~AT-347WK / AT-614WK~AT-684WK

Features

• Similar to the high-voltage SR series, the high-voltage AT series utilizes our unique insulation method.
• This method increases the creepage distance and incorporates a complete vacuum impregnation process.
• These improvements result in highly reliable insulation performance.
• Additionally, the high-voltage AT series can withstand harsh environments, including high humidity and dust.

Specifications

◆AT-3110~AT-310K / AT-6110~AT-610K

◆AT-314K~AT-332K / AT-614K~AT-632K

Features

• Our starters originated from the dry-type low-voltage starting transformer.
• This transformer was standardized in 1949 for marine applications, where minimizing power capacity was crucial.
• Since then, we have continuously improved upon the design.
• It has become a testament to its ability to withstand harsh operating conditions.

Specifications

◆ Wiring Diagram

Features

• The coil section, molded with epoxy resin, provides excellent resistance to moisture and dust.
• It eliminates concerns regarding insulation degradation.
• The resin is also flame-retardant and self-extinguishing, ensuring fire safety.
• Additionally, the iron core legs use our company’s unique circular wound iron core.
• This design is superior in resisting electromagnetic mechanical forces.

Features

• We have optimized the ratio of the iron core, wires, and gap material of the structural components using computer simulations.
• As a result, we have achieved a smaller, lighter, and slimmer design.
• Additionally, by arranging the external connection terminals vertically, we have prevented the accumulation of dust and other particles.
• This design helps to avoid tracking phenomena caused by these particles.

Specifications

◆Wiring Diagram

Features

• The wound iron core, circular coil, and triangular arrangement are key structural features.
• The triangular coil arrangement has the advantage of ensuring that the magnetic paths of the three phases are identical.
• Additionally, the circular shape, along with the red and black appearance, has long been a symbolic image of our company.
• This design has been well-received by our customers.

Specifications

◆ General Characteristics

◆SR-3055~SR-310K / SR-6055~SR-610K

◆SR-314K~SR-347K / SR-614K~SR-647K

Features

• All cores are made from wound iron cores.
• The design is cost-effective, supported by extensive data, and results in a compact and lightweight form.
• Additionally, the product catalog organizes models by capacity, starting current, and time rating.
• This allows for the selection of the appropriate product to meet a wide range of needs.

◆General specifications

◆ Wiring Diagram

Features

• Reactors are used in high-frequency circuits for various purposes.
• These purposes include smoothing out steep current waveforms and suppressing noise.
• At our company, we carefully consider the materials and configuration of the iron core and conductors.
• We optimize these components according to their intended use during manufacturing.

Features

• The use of inverters, UPSs, or DC power supplies introduces large amounts of high-frequency and noise currents into the power supply.
• DC reactors are designed to suppress these harmful currents.
• These reactors also reduce capacitor inrush current.
• This suppression helps prevent rectifier burnout and extends the lifespan of the system.

The post Denki Keiki Co., Ltd. DC Reactor first appeared on Kouei Japan Trading | Get Quotation.]]> https://koueitrading.com/global/product/denki-keiki-co-ltd-series-reactor/ Tue, 07 Apr 2020 04:34:58 +0000 https://koueitrading.com/global/?post_type=product&p=196507 Manufacturer: Denki Keiki Co., Ltd. Model: Series Reactor Features These devices are mainly used in conjunction with capacitors. Their purpose is to suppress harmonic currents flowing from various equipment into power distribution circuits. In this case, specific inductance characteristics are essential to target the desired harmonic order. Our company primarily contributes through OEM services.

Features

• Circuit current may rise due to several factors.
• This increase in current can cause voltage drops and, in extreme cases, result in fires.
• Current-limiting reactors are used to control and suppress the current to a safe level.
• We offer two types of current-limiting reactors: iron-cored and air-cored.

Features

• The advancement of power electronics has led to the creation of sophisticated equipment.
• Many of these new technologies make use of high-speed semiconductors.
• This development has made it challenging to meet the requirements of traditional reactors.
• We provide ideal reactor solutions that cater to a wide variety of applications.

Features

• High insulation is provided by the triple-layer shield.
• Standard safety covers are equipped on the outlet model to prevent electric shock.
• The device is designed to prevent electrical damage to surrounding equipment and can be stored in a case.
• Due to abnormal weather conditions and urban heat island effects, localized, sudden lightning strikes have increased in recent years. It is generally stated that the lightning surge voltage on low-voltage circuits exceeds 3000V.
• The SRT series is a transformer designed to protect electrical equipment from lightning strikes. Advanced lightning protection and surge shielding technologies are incorporated to ensure the safety of machinery by suppressing lightning surges.

Specifications

◆ Standard Model Type

◆Circuit Diagram

◆Lightning-resistant Transformer

◆Performance Table

Features

• The most suitable coil winding structure for the transformer’s performance and economic design is adopted by the NRT series, resulting in large-capacity, low-cost, high-quality electric transformers.
• Noise suppression in common modes is enhanced by the incorporation of normal-mode and differential-mode noise removal functions.
• Electromagnetic interference is effectively suppressed, even in cases where noise propagation through general circuits or connection points is uneven.
• Complete protection against input and output disturbances or misapplications is provided by the product.
• Highly advanced technologies for electric insulation, electromagnetic noise reduction, and special manufacturing processes are utilized to ensure the highest performance and reliability.
• With the rapid progress in miniaturization and high efficiency of electronic devices, low-voltage power supplies and high-frequency technology are effectively utilized.
• The difficulties in noise countermeasures are reduced, and the technology that maintains noise isolation is improved.
• The NRT series plays a major role in EMI/EMC countermeasures, with filters and shield technologies focused on enhancing electromagnetic interference suppression for high-efficiency performance.

Specifications

◆Circuit Diagram

◆ Standard Model Type

◆Interference Wave Suppression Transformer (Type B, Type F)

Features

• Power conditioners are essential for renewable energy generation, and transformers along with reactors are key components of them.
• High-reactance transformers are designed to effectively use the reactance naturally found in the transformer to add reactor functionality.

Features

• A power transformer is used to operate the main switch, on/off indicators, and on/off controls of high-voltage power distribution panels.
• The key feature of this product lies in its design, which reduces voltage fluctuations at each load power factor.
• This design enhances the instantaneous capacity when the circuit breaker is closed.
• Higher switching capacities can be selected due to the increased instantaneous capacity provided by this product.

Specifications

◆Characteristics of the transformer for operation use

• This device is a transformer used for high-voltage side and low-voltage side operation, which is necessary for equipment such as the main circuit breaker and operation panel.
• The transformer is designed to operate at high voltage with a high training tolerance, requiring high reliability and performance in operation.
• Special attention is paid to the performance and durability of the equipment. It is designed to function efficiently and be used for various applications with high load capacities.
• In addition, the product can be customized to meet individual needs, and it has been tested with high reliability under several conditions to ensure that it performs effectively.

◆Wiring Diagram

◆Double Series Switching Method

◆Single-phase Three-wire Method

◆Single-phase, High-voltage Operation Molded Transformer