Trane Starters Engineering Bulletin page 26

Low-Voltage Starter Types
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Figure 18. Trane AFD
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Features
The standard design features for the AFD include:
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The AFD is rated by output current and is limited to a maximum of 100-percent continuous RLA
(rated-load amps) by theTrane
results in 100-percent torque generated by the motor.
NEMA 1, ventilated enclosure with a hinged door, tested to a short-circuit current rating of
65,000 amps.
Padlock-able, door-mounted circuit breaker/shunt trip with an AIC rating of 65,000 amps.
SCCR/AIC rating of 100,000 amps available as a design special.
UL/CUL listed as a package.
Simple, modular construction.
480/60/3 input power ±10 percent, with drive overload capability of 100 percent continuous to
150 percent for five seconds.
Note: For voltages other than 460/480 V, a transformer is currently needed to produce
460/480 V.
Motor thermal overload protection 102 percent continuous, 108 percent for 60 seconds,
140 percent for 1.5 seconds.
Minimum efficiency of 97 percent at rated load and 60 hertz.
Soft-start, controlled acceleration, coast-to-stop.
Adjustable frequency from 38 to 60 hertz.
Control circuit voltages physically and electrically isolated from power circuit voltage.
150 percent instantaneous torque available for improved surge control.
Output line-to-line and line-to-ground short-circuit protection.
Ground fault protection (UL listed).
®
chiller unit controller. A 100-percent output current capability
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3
1. Pre-charge contactor
2. Inductor (behind the panel)
3. Adjustable-speed drive
(inverter)
4. Circuit breaker (standard)
5. Active rectifier
6. 3 kVA control-power
transformer
CTV-PRB004-EN