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Saminco DC/AC Shuttle Car System

Loaded Car Under Test

Control XP Box

Loaded Car Under Test

Saminco 550 Volt DC/AC Shuttle Car System

Trailing Cable Advantages:
DC cable more reliable
DC cable easier to troubleshoot
Quicker/easier repairs to the cable
Longer lengths allowed by MSHA – 850 feet of #2/0 is common
Can get more cable on the reel
Less Trailing Cable heat  - up to75 percent less heat than 250VDC Trailing Cables

Performance Advantages:  
Load Sharing Tram Motors
Reliable Electrical Braking
Variable Speed Conveyor
Approximately two times more power can be delivered to the Shuttle Car than both 440VAC and 250VDC Trailing Cables

Shuttle Car Controller Advantages:
Less heat in XP box
No VFD front end losses
No hot chokes in drives

AC Motor Advantages:
Substantial increase in mass and torque as compared to competitive motor
Copper Rotor
RTD's in windings to monitor motor temperature
Compatibility with 440VAC motors

Safety Advantages
Motor and Drive Ground Faults detected immediately
Also detects Trailing Cable Faults on Shuttle Car
Power center instantly shuts down in case of cable break - no live open wires on ground