35 kV Dry-Type OLTC Transformer

FR | ES | RU

Home

35kV dry-type on-load (OLTC) regulating power transformer

35kV dry-type on-load (OLTC) regulating power transformer

Rated Capacity: 3,150–25,000 kVA
High Voltage: 35 / 36 / 37 / 38.5 kV
Low Voltage: 6 / 6.3 / 10 / 10.5 / 11 kV
Transformer Type: Three-phase dry-type power transformer
Vector Group: Dyn11 / Yd11
Voltage Regulation: On-load tap changing (OLTC), table tapping range +4×2.5%

Inquiry

Product Introduction

Product Overview

Yawei Electric's 35 kV dry-type three-phase on-load tap-changing power transformer is designed for applications that require voltage regulation during operation. The parameter table lists rated capacities from 3,150 to 25,000 kVA, high-voltage options of 35 / 36 / 37 / 38.5 kV, and low-voltage options of 6 / 6.3 / 10 / 10.5 / 11 kV.

Available table configurations include Dyn11 / Yd11 vector groups and an OLTC tapping range of +4×2.5%. Final capacity, voltage, winding, enclosure, cooling arrangement and applicable standard are confirmed against the project specification and technical agreement.

Technical Specifications

35 kV dry-type on-load (OLTC) voltage regulating power transformer (3,150–25,000 kVA).

Rated capacity (kVA)	HV (kV)	Tapping range (%)	LV (kV)	Vector group	No load current (%)	Impedance voltage (%)	No load losses (kW)	On load losses - B (100°C) (kW)	On load losses - F (120°C) (kW)	On load losses - H (145°C) (kW)
3150	35 / 36 / 37 / 38.5	+4×2.5	6 / 6.3 / 10 / 10.5 / 11	Dyn11 / Yd11	0.6	7.0	5.67	24	25.4	27.2
4000					0.6	8.0	6.64	28.7	30.4	32.6
5000					0.5		7.85	34	36.1	38.6
6300					0.5		9.27	39.4	41.8	44.7
8000					0.45	9.0	10.6	44.8	47.5	50.8
10000					0.45		12.1	53.9	57.1	61.2
12500					0.35		14.7	62.7	66.5	71.1
16000					0.35		18.1	73.8	78.2	83.7
20000					0.3	10.0	21.4	83	88	94.2
25000					0.3	10.0	25.2	98.2	104	111

Application

Customization Service

Certifications

Packing and Delivery

Testing and Quality Assurance

Each transformer undergoes factory testing before delivery according to the agreed specification, including:

Routine tests (ratio, resistance, losses)
Type tests (temperature rise, impulse test)
Special tests (upon request)

Applicable standards and required tests are confirmed according to the project specification and final technical agreement.

Installation and Maintenance

Installation and maintenance requirements are determined by the selected enclosure, cooling arrangement, site conditions, and final technical agreement.

Previous: 35kV dry-type off-circuit voltage regulating power transformer

Next: Noine

Tell us the required capacity, primary and secondary voltages, phase, frequency, installation environment, applicable standard, and delivery destination. Our sales and engineering teams will review your requirements and respond within one business day.