Oil Drilling Platform




High Horsepower AC Drive Modular Design


Description 800~1600HP

The SN-HH series of AC drives is a high performance AC Drive  that produces an output of adjustable voltage and frequency to control the speed of a squirrel cage induction motor for drilling. The modular design unit has separate converter capacitor inverter sections installed in a common enclosure. Sections can be paralleled to increase power.

This PWM design provides high starting torque by use of IGBT transistors. The drive provides 3 modes of control and speed accuracy to suit application requirements; V/Hz (2%), sensor less vector (0.1%), or flux vector control (0.01% / motor-mounted Resolver (standard) and drive-mounted PG-RD1 card required). Programmable, networkable, and modular are outstanding features of the SN-HH series AC drive.


Performance Features

• Ratings:

600 to 1600 HP at 460 VAC,
800 to 1600 HP at 600 VAC

• Overload capacity:

150% for 60 sec CT

• Starting torque: 150%
• Electronic reversing
• Adjustable accel/decel: 0.1 to 6000 sec

• Controlled speed range:

(1) 40:1, (2) 100:1, (3) 1000:1

• Drive efficiency: 96 to 98%
• Displacement power factor: 0.98
• Output frequency: 0.1 to 400 Hz
• Jog forward and reverse
• Power loss ride-thru: 2 sec
• Inertia ride-thru
• Selectable auto restart after momentary power loss

• Programmable auto restart

(0 to 10 attempts) on resettable fault

• Critical frequency rejection:

3 selectable, adjustable bands


Protective Features

• DC bus CHARGE indicator
• Optically-Isolated controls
• Phase-to-phase / phase-to-neutral short circuit protection
• Ground fault protection
• Electronic motor overload
• Current and torque limit
• Overtorque/undertorque detection
• Fault circuit: overcurrent, overvoltage, and overtemperature
• Input/output phase loss

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