Brochure

Bringing in fresh air
Demand-controlled fans
In ventilation plants, GP variable speed
drives help you cut costs and optimize
safety. The drives ensure that supply and
exhaust fans are operating according to
actual demand.
More safety and efficiency
As standard, the GP can detect a variety
of events, such as when:
• Belt has failed
• Fan is blocked
• Motor is overloaded
• Bearing is worn down
The GP continuously monitors key
parameters such as power consumption
and speed, and alerts the user if the airflow
is interrupted. An external belt monitor is
not required.
Whenever demand is low, the intelligent
hibernation mode kicks in, reducing energy
consumption and wear. Last but not least,
the GP also has an automatic restart
function in case a short disturbance or
power outage should occur.
Saving lives with essential service mode
(ESM)
In the event of a fire, the GP automati-
cally changes over to ESM, ensuring that
the system ignores all external faults and
warnings. The goal is to maintain an over-
pressure through ventilation as long as
possible, so that escape routes are kept
free of smoke and doors can continue
to be opened easily.
Low Harmonic Technology
Low Harmonic Technology, developed by Siemens,
reduces harmonic currents directly on the AC line.
Extra components such as external chokes or filters
are a thing of the past. Benefits of Low Harmonic
Technology include:
– Direct cost savings – additional components
are unnecessary
– Lower maintenance costs and longer service life
– Additional protection for sensitive equipment
– Less blind current – possible compensation costs
are cut
Efficiency pays off
HVAC plants are sized to handle a wide range of loads,
but often – % of the time, on average – the actual
demand is lower than the maximum rating. This is
where variable speed drives can provide a valuable
service. By allowing the various pumps and fans
within the system to wind back to match the actual
demand, energy consumption can be reduced by
up to %. This translates into a significant reduction
in running costs.
Variable speed drive with Low Harmonic Technology
Variable speed drive without Low Harmonic Technology
Current (%)
Time
150
–150
100
50
–50
–100
0
Highlights
• Smart ventilation-specific
functions for all types of
events
• Increased safety thanks to
essential service mode
(ESM)
• Investment security through
intelligent monitoring
• Up to % energy savings,
cutting operation costs
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