Special purpose transformer *Capable of withstanding stress during switching!!

basic information

At Rishō Industrial, in addition to standard type molded transformers used in power distribution equipment, we specialize in the design and manufacturing of special purpose transformers used in testing equipment, power plants, and energy-saving operations for pumps and motors. Based on the technology and know-how cultivated through numerous successful applications, we design and manufacture "custom specifications" transformers tailored to each customer's needs. Please feel free to consult us first. *For more details, please download the catalog or contact us directly.

Price range

Delivery Time

Applications/Examples of results

There are many successful applications in power plants, testing equipment, and energy-saving operations of pumps and motors.

Detailed information

• 

  Grounding transformer - It is a transformer used for generators such as wind power generation and micro gas turbines, where the neutral point cannot be directly grounded. - It is used to detect zero-sequence current and zero-sequence voltage in the event of a ground fault in the circuit. - Generally, grounding transformers are specified by their short-time rating. - It has a low zero-sequence impedance.

• 

  Transformer for Wind Power Generation - A transformer installed inside the tower of floating offshore wind power generation. - Seismic performance that can withstand vibrations with a frequency of 2Hz to 100Hz and an acceleration of 0.7G. - Tilt performance that allows operation without issues even when the transformer is in a tilted or rolling state. - Both primary and secondary sides adopt a close-contact insulation cap structure, further enhancing dirt resistance performance. - It is also possible to have a fixed structure that can withstand transportation in a horizontal position while still installed in the tower.

• 

  Pulse Transformer - It is a transformer that supplies high-voltage pulse power to high-power microwave tubes such as klystrons. - The internal wires are firmly encapsulated in epoxy resin, which suppresses vibrations caused by electromagnetic mechanical forces. - By mechanically fixing the primary and secondary coils, the electromagnetic mechanical stress between the coils is enhanced. - It has a large inductance and a small sag. - The rise and fall times are steep, and the back swing is small.

• 

  Transformer for Direct Inverter 〇 This is a multi-winding transformer used in inverter devices for energy-saving operation of pumps and motors. 〇 By discarding the secondary winding, it contributes to energy-saving operation with minimal voltage fluctuations, even when connected to high-capacity inverters. 〇 We also accept manufacturing of rare winding types due to impedance matching.

• 

  Transformer for UPS (Uninterruptible Power Supply) - UPS systems are often connected to computer-related equipment, and this transformer is designed considering the "harmonics" produced by these devices. - To suppress overcurrent to the UPS device, the inrush current of the transformer is limited to about 1 to 5 times, and it can be designed to accommodate your desired inrush current. - It is strong against short-circuit mechanical forces and can handle multiple operations (more than 5 times per day). - By equipping a contact prevention plate, it can reduce noise above 1 kHz by approximately 30 dB.

• 

  Transformer for DC power supply devices - It is used in devices that convert DC from solar power generation and storage systems into AC. - It has the function of suppressing the outflow of harmonic currents into the transmission and distribution system through multi-pulse operation. - It can achieve 6 to 24 pulses with a single unit, making it energy-efficient and space-saving. - The consistency of the short-circuit impedance of each winding is good. - It is equipped with a touch prevention plate, which suppresses the transfer of surge voltage to the secondary side.

• 

  Transformer for Testing Equipment Case 1 - This is a transformer manufactured by Rishou Industry for testing large current transformers and similar devices for in-house use. - Number of phases: Single-phase - Rated capacity: 100 kVA - Primary voltage: F440-R420-F400 - Secondary voltage: 20V - Primary current: 238A - Secondary current: 5000A - Rated frequency: 50/60Hz - Approximate dimensions: 850 × 560 × 1350H 670kg

• 

  Transformer for testing equipment Case 2 - It is a three-winding transformer with a primary Δ and a secondary Δ/Y connection, equipped with a 5-step voltage switching tap. - The transformation ratio error for all tap voltages of the secondary Δ/Y is kept small, within ±0.5%. - Additionally, the difference in short-circuit impedance between the primary and secondary Δ and between the primary and secondary Y is also kept small, at about 1%. - All tap voltages of the secondary Δ/Y can be used at full capacity.

• 

  Transformer for testing equipment Case 3 - The structure allows for voltage switching by changing the connection of the six secondary windings in series and parallel. - By arranging the secondary windings on the outer circumference, it enables switching of the secondary voltage. - To accommodate large currents, the secondary voltage switching terminals are made of copper busbars and are designed to be drawn out from the front of the molded coil. - The voltage switching terminal section is equipped with terminal bolts to improve the workability of voltage switching.