ABB expands its switch-disconnector portfolio to 800–1000V AC

Engineered to support enhanced AC-side voltages in modern solar and industrial installations.
As solar plants and power systems move toward enhanced voltages, our high-performance OTHV switch-disconnectors deliver improved system efficiency — especially in string-inverter architectures with long cable runs to MV/LV transformers.
Using higher AC-side voltages (800–1000V AC) raises inverter power density and can deliver overall system savings up to 20% through several factors such as conductor losses, optimized inverter sizing, and reduced BOS cost.
 
Product highlights:
  • Enclosed IEC series for 800–1000V AC with IP65 protection and ergonomic handle options
  • Current range from 100A to 2500A
  • Triple-certified models (200–800A) for worldwide deployment
  • Inverter-side models (100–1250A) for safe, reliable isolation
OTHV_group_def_HIRES

Key benefits of Higher Voltage

AC Switch-disconnectors is a critical component to ensure safety and control of electrical systems in various industries
  • Reduce current → Smaller cable cross section → Lower losses
  • Higher voltage → Higher power density inside inverters → Gives overall savings up to 20%
  • Compact system design reduce footprint
  • Reduced Balance of System cost 

Application areas

OTHV-switch-disconnectors-applications (3)
Solar
OTHV-switch-disconnectors-applications (4)
BESS
OTHV-switch-disconnectors-applications (1)
Wind
OTHV-switch-disconnectors-applications (2)
Marine
Solar

Application Note: Smarter High-Voltage AC Solutions

This Application Note shows how our new 800–1000V AC help deliver safe operation, reliable performance, and easy grid integration for photovoltaic and battery energy storage applications.

 

Value propositions

Untitled-7
Safety Focus

Safety is our top priority. Our switch disconnectors are equipped with multiple layers of safety features:
• Clear off and on markings
• Door interlocked in ON-position
• Padlockable in OFF-position to prevent accidental usage

installationpictogram_OTHV
Easy installation​

The modular design and clear connections make installation straightforward and convenient:
• Modular design
• Clear connections
• Convenient setup

pictograms
High Quality

Manufactured from high-quality materials and advanced technology, our switch disconnectors are built to be durable and reliable even under tough conditions:
• High-quality materials
• Advanced technology
• Built for durability and reliability
• Performs under tough conditions

Untitled-8
Versatile Usage

Our switch disconnectors range is the perfect fit for various industries:
• Industrial automation
• Energy distribution
• Power plants
• And more

Documents

Related products

Frequently Asked Questions


Can the OTHV be ordered as a configured enclosed switch with auxiliary contacts?

Yes. All enclosed OTHV switches come standard with 2 normally open contacts and 1 normally closed contact as auxiliary contacts.


What are the testing standards and IP ratings for the enclosed OTHV switch?

The OTHV enclosed versions are additionally tested for both IP65 (ingress protection) and IK (impact resistance) ratings following IEC 60947-3 to ensure durability in demanding environments.


What pole configurations are available for the OTHV?

The OTHV switches are available in 3 and 4 pole options, providing flexibility for different application requirements.

  • Contact us

    Submit your inquiry and we will contact you

    Contact us
Select region / language