ac-logo.jpgText Box: Model SN-HH
Text Box: 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
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

Oil Drilling Platform Drive