VOLTAP is a European brand specializing in the design and manufacture of On-Load Tap Changers (OLTCs) — essential components that ensure stable voltage regulation in power transformers under varying load conditions.
Backed by over seven decades of transformer engineering expertise, VOLTAP combines traditional European craftsmanship with advanced technology to deliver reliable, efficient, and durable OLTC solutions trusted worldwide.
Engineering Excellence
With over 50,000 OLTCs installed globally, VOLTAP serves transformer manufacturers, utilities, and EPC companies across continents. Each tap changer is designed and manufactured in accordance with IEC 60214 standards, offering both oil-immersed and vacuum-type solutions.
Design Philosophy
VOLTAP’s products emphasize:
- High electrical & mechanical endurance for long life and minimal maintenance
- Compact modular construction adaptable to diverse transformer configurations
- Low switching losses & reliable contacts reducing thermal stress
- Compatibility with natural ester fluids (Midel, FR3) for eco-friendly operation.
Product Range
- RS5/RSV5 Series: Compact OLTCs for distribution and industrial transformers, up to 1250 A and 1000 V/step.
- RS6/RSV6 Series: For higher-current transformers up to 1250 A, 2500 V/step, and 300 kV class.
- RS9.3/RSV9.3 Series: Popular for utility transformers up to 1600 A and 4000 V/step, in single- or three-phase designs.
- RS12/RSV12 Series: High-voltage, vacuum-type OLTCs tested to 170 kV, offering over one million mechanical operations.
- MDU (MZ4.4/MZ11): Precision motor drive units featuring robust construction, low noise (<60 dB), intelligent monitoring, and SCADA compatibility.
Testing & Quality Assurance
All VOLTAP OLTCs undergo rigorous type testing at in-house or accredited independent labs, covering dielectric, thermal, endurance, and short-circuit performance per IEC 60214-1. Continuous R&D and infrastructure investment ensure quality, innovation, and compliance with global standards.
Applications
VOLTAP OLTCs are ideal for:
- Power & distribution transformers
- Industrial & furnace transformers
- Renewable energy grid and transmission transformers
- Single or three-phase, star, or delta configurations
Retrofit Solutions
VOLTAP also offers customized retrofit solutions to replace outdated OLTCs, extending transformer life and improving reliability with minimal design modifications.
After-Sales & Service
A global network of certified specialists provides:
- Preventive/corrective maintenance
- Spare parts and inspections
- On-site supervision and training
- Diagnostic and condition assessments
- These services ensure optimal performance, reduced downtime, and extended operational lifespan.
Sustainability Commitment
Supporting the green energy transition, VOLTAP’s OLTCs are ester-fluid compatible, low-maintenance, and designed for environmental safety — embodying sustainability throughout their service life.
More information: Email: timir@omtechnicalsolutions.com
Website: www.omtechnicalsolutions.com
