TECO F33 Series, Instruction Manual, Page: 34 / 192

Applications 31
6. Applications
This chapter contains tables giving an overview of many
different applications/duties in which it is suitable to
use variable speed drives from TECO. Further on you will find application examples of the most common
applications and solutions.
6.1 Application overview
6.1.1Pumps
6.1.2Fans
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Dry-running, cavitation and overheating damage
the pump and cause downtime. Pump Curve Protection detects deviation. Sends
warning or activates safety stop.
411–419, 41C1– 41C9
Sludge sticks to impeller when pump has been run-
ning at low speed or been stationary for a while.
Reduces the pump’s efficiency. Automatic pump rinsing function: pump is set to
run at full speed at certain intervals, then return
to normal speed.
362–368, 560, 640
Motor runs at same speed despite varying
demands in pressure/flow. Energy is lost and
equipment stressed. PID continuously adapts pressure/flow to the
level required. Sleep function activated when
none is needed.
320, 380, 342, 354
Process inefficiency due to e.g. a blocked pipe, a
valve not fully opened or a worn impeller. Pump Curve Protection detects deviation. Warn-
ing is sent or safety stop activated.
411–419, 41C1–41C9
Water hammer damages the pump when stopped.
Mechanical stress on pipes, valves, gaskets, seals. Smooth linear stops protect the equipment. Elimi-
nates need for costly motorized valves.
331–336
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Starting a fan rotating in the wrong direction can be
critical, e.g. a tunnel fan in event of a fire. Fan is started at low speed to ensure correct
direction and proper function.
219, 341
Draft causes turned off fan to rotate the wrong way.
Starting causes high current peaks and mechanical
stress.
Motor is gradually slowed to complete stop before
starting. Avoids blown fuses and breakdown.
219, 33A, 335
Regulating pressure/flow with dampers causes
high energy consumption and equipment wear. Automatic regulation of pressure/flow with motor
speed gives more exact control.
321, 354
Motor runs at same speed despite varying
demands in pressure/flow. Energy is lost and
equipment stressed.
PID continuously adapts to the level required.
Sleep function is activated when none is needed.
320, 380, 342, 354
Process inefficiency due to e.g. a blocked filter, a
damper not fully opened or a worn belt. Load Curve Protection detects deviation. Warning
is sent or safety stop activated.
411–419, 41C1–41C9