26 CTV-PRB004-EN
Low-Voltage Starter Types
• The AFD is rated by output current and is limited to a maximum of 100-percent continuous RLA
(rated-load amps) by theTrane
®
chiller unit controller. A 100-percent output current capability
results in 100-percent torque generated by the motor.
Features
The standard design features for the AFD include:
• NEMA 1, ventilated enclosure with a hinged door, tested to a short-circuit current rating of
65,000 amps.
• Padlock-able, door-mounted circuit break er/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).
Figure 18. Trane AFD
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
1
2
4
5
6
3
CTV-PRB004.book Page 26 Sunday, December 18, 2011 6:39 PM
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