General Description
The Pacemaster 6 is a packaged DC drive designed for controlling motor speed and torque. It is a three-phase, full-wave AC to DC power converter, suitable for a variety of industrial applications. The drive includes a power module, DC loop contactor, AC line current limiting fuses, a 115VAC control transformer, and RUN/JOG logic. It is available in non-reversing or reversing configurations and complies with National Electrical Code and NEMA standards. UL recognition is standard, with UL listing available upon request.

Standard Features
The Pacemaster 6 includes several standard features for enhanced performance and reliability:

• NEMA Power Code C with a six SCR full-wave power converter.
• Phase sequence insensitivity for flexible AC input connections.
• Automatic phase-locked loop synchronizing circuit for noise immunity.
• Isolated feedback for armature voltage and current.
• Temperature compensated reference and solid-state motor overload protection.
• Current limiting fuses and a 115 V AC control transformer.
• Direct line operation without the need for an isolation transformer.
• User selector switches for various operational settings.
• Memory type fault detector with LED indicators for diagnostics.

Available Options
Optional features include instrument follower, tachometer or voltage follower, field regulator, additional control relays, special DC field voltage, speed and load meters, NEMA enclosures, dynamic braking, and more.

Specifications
The drive supports a horsepower range of 5-300 HP, with AC line input voltages of 230 or 460V and frequencies of 50 or 60 Hz. It offers a speed range of 30:1 with armature feedback and 100:1 with tach feedback. The drive is designed for continuous duty with a service factor of 1.0 and can handle line voltage variations of +10% to -5% of nominal.

Performance Characteristics
Key performance metrics include:

• Speed regulation of 1.0% with armature feedback and 0.1% with tach feedback.
• Efficiency of 88% at rated speed and load.
• Displacement power factor of 0.96.

Operating Conditions
The drive operates effectively under ambient temperatures from 0 to 55°C, relative humidity of 5 to 95% (non-condensing), and altitudes up to 3300 feet (1000 meters).

Adjustments
Adjustable parameters include acceleration/deceleration, current limit, maximum and minimum speed, IR compensation, and speed adjustment with an external potentiometer.

Dimensions
Dimensions vary based on configuration and options, with certified mounting dimensions available upon request. Note that data is subject to change without notice.