High-Efficiency Traction Rectifier Transformer - Optimized for Light Rail & Tram Networks

Product Description

Traction Rectifier Transformer


 

·Description
Zhejiang Zegota Precision Technology Co., Ltd. is a leading manufacturer dedicated to the research, development, and production of high-quality power equipment. With a focus on innovation and sustainability, we specialize in dry-type transformers, arc suppression complete sets, reactors, new energy compact substations, and energy storage conversion and step-up cabin solutions. Our products are designed to meet the evolving demands of modern power systems, emphasizing reliability, advanced technology, and environmental responsibility.
Driven by a commitment to technological progress, we continuously invest in R&D, product iteration, and production line upgrades. This enables us to offer a comprehensive product portfolio characterized by full-series coverage, complete specifications, and the integration of primary and secondary equipment technologies. Our solutions support the transition toward a smarter, greener grid, helping clients enhance grid stability, improve power quality, and achieve efficient energy utilization.
At Zegota, we strive to deliver not just products, but dependable and forward-looking power solutions that contribute to a more resilient and sustainable energy future.

·Product Overview
ZQSC Series Dry-Type Traction Rectifier Transformer adopts a four-winding, double-split configuration. Both the primary (grid-side) and secondary (valve-side) windings are integrally cast using vacuum thin-layer insulation technology. The primary windings employ an extended delta connection, each phase-shifted by ±7.5°. The secondary windings utilize a combination of delta (d) and wye (y) connections. The line voltage vectors of the secondary windings from two such transformers differ by a 15° phase shift. When connected in parallel after full-wave rectification, they form a twelve-phase, twenty-four-pulse rectifier power supply system. The transformer features a novel design, compact size, stable DC output, low ripple interference, and low operational noise.


·Product advantage

"Multi-pulse Rectification Technology (Primarily 24-pulse)": Utilizes an axial double-split winding structure. The high-voltage side achieves 24-pulse rectification through extended delta phase-shifting windings (±7.5°), effectively suppressing harmonics.

"Enhanced Anti-Harmonic Design": The low-voltage valve side employs dual star/delta winding outputs. The winding design optimizes capacitance distribution, withstands high-order harmonic impacts from frequency converters, maintains partial discharge levels <5 pC, ensures smooth output waveforms, and provides strong short-circuit resistance (Note 1).

"Heavy-Duty Load Adaptability": Designed according to Class VI load standards (e.g., subway traction stations), capable of sustaining 1.5 times the rated load for 2 hours and 3 times the rated load for 1 minute under peak demand, meeting the frequent start-stop scheduling requirements of rail transit.

"Low": Low temperature rise, designed with Class H insulation but evaluated under Class B temperature rise standards (70K).

"Durable": Excellent weather resistance and corrosion resistance, resistant to salt spray, damp heat, high temperatures, and strong environmental endurance, suitable for coastal salt spray corrosive environments (C4).

"Efficient": Complies with GB/T 35553 "Energy Efficiency Requirements for Electromechanical Equipment in Urban Rail Transit," featuring high energy efficiency, maintenance-free operation, and low operational costs.

Note 1: Simultaneously exhibits the characteristics of energy-saving dry-type transformers.

·Product Details

Item	Unit	Parameters	Remarks
Model	/	ZQSC(B)	Customizable
Rated Capacity	kVA	1000-5000	Customizable
Rated Voltage (Primary Side)	kV	10/35	Customizable
Rated Voltage (Secondary Side)	kV	0.69 /1.18, etc.	Customizable
Frequency	Hz	50/60	Customizable
System Insulation Temperature Class	/	H Class, F Class	Customizable
Tapping Range	/	±2x2.5%, ±5%	Customizable
Voltage Regulation Mode	/	Off-circuit Tap Changer	Customizable
Short-circuit Impedance	%	6% -8%	Customizable
Vector Group Symbol	/	Dy5d0, Dy7d2, etc.	Customizable
Accessories	/	Fan/ Temperature Controller / Intelligent Terminal	Customizable