IMO Technical Brochure
Innovators in TRUE DC isolation
Since its launch, the SI range of TRUE DC isolators has set the benchmark safety standard for disconnection and isolation of the DC panel load
in solar applications world-wide. Prior to the introduction of the SI series, AC modied isolators in multi-pole linked form were commonly used
with all the performance and safety issues that such devices presented.
The SI TRUE DC range was specically developed to meet the needs of the solar industry with full operator independent switching mechanism,
a guaranteed 5ms maximum arc suppression time and long-life knife edge contacts. Arc chambers built-in to the unit keep the device cool
under repeated operation and the full range of mounting options provide a solution for almost every application.
Adopted as the standard by many of the largest solar equipment designers and installers around the world, the SI Series continues to set the
benchmark in solar safety.
Additional Resources
There is only so much you can illustrate in printed form, so we have included a QR
code which will take you directly to the Featured Spotlight for TRUE DC isolators on
the IMO website. Here you will be able to watch a couple of videos about solar safety
and recommendations from the Institution of Engineering & Technology in
conjunction with the BRE National Solar Centre, about raising the bar for quality in
the solar PV industry.
TRUE DC Isolators for PV Systems
• Market-leading design
• 2, 4, 6 & 8 pole versions available
• Max. rated current 85A@1000VDC (acc. to DC21B/DC-PV1 for SI55)
• Range of mounting options
• Guaranteed arc suppression (3ms typical)
• Operator independent switching mechanism
• Knife-edge contacts
SI Solar Isolators
QR CODE
SCAN
ME
UL508i
Leaders in Solar Safety
12