|
Drives Service & Support > Legacy > 1375
The SpeedPak Regulated Speed Drives |
 |
| Status | Inactive: August, 1993 Discontinued: August, 1998 Obsolete: August, 2000 |
| Recommended Upgrade | Bulletin 1395 |
Description
The Bulletin 1375 Standard Package Drive is designed to convert either 230 volts or 460 volts, 3 phase, 60 Hz AC power to controlled DC power and thereby provide speed control to a DC motor.
The Bulletin 1375 is a limited option drive offering reliability and low maintenance frequency ? a result of thorough factory testing, conservative design and a unique regulating system. It is built to industrial control standards and exhibits smooth and consistent performance characteristics. The white interior, uncrowded layout, complete circuit identification and unique printed circuit board terminations also contribute to ease of maintenance. The continuous control of current keeps the drive in operation and guards against random nuisance shutdowns due to uncontrolled overcurrent.
Standard Features - Drive controller in a NEMA Type 1 enclosure provides the following standard features.
- AC supply line circuit breaker - manually operated
- Transient protection network
- Six thyristor AC to DC power conversion circuits
- Regulated armature current
- Horsepower rated armature circuit contactor
- Insensitive to AC phase sequence
- AC current unbalance and phase loss protection
- Overload protection - Undervoltage protection
- 115 volt control - Non-reversing - coast to rest
- Run/Jog selection, Jog Speed adjusted by Speed control potentiometer
- Adjustable static linear acceleration and deceleration control
- Adjustments: Minimum, Maximum speed; Current limit; Acceleration time; IR compensation
- No interaction between drive adjustments
Operator Control Station
Optional Features
- Dynamic braking - Load indicator
- Contactor reversing with regenerative stop
- 1.0% or 0.1% speed regulation with tachometer
- Remote torque limit adjustment
- Speed indicator (requires tachometer)
- Isolation transformer - Circuit analyzer
- Outside door circuit breaker operator
- Tachometer or instrument follower
- Separately adjustable preset speed
- Separately adjustable jog speed
- NEMA Type 12 enclosure
- Motor mounted blower with starter
Equipment List
Drive Control Assembly
Enclosure
- Nema Type 1 with white interior
Basic A.C. Control
- AC supply line motor circuit protector manually operable
- 115 volt fused control and transformer
- Run relay Regulator relay
- Undervoltage protection
- Motor overload protection - N.C. thermostat
- Basic D.C. Control
- Horsepower rated armature curcuit contactor
Regulator
- Linear acceleration/deceleration control, independently adjustable 3-60 seconds
- Armature voltage feedback with IR compensation
- Maximum and minimum speed adjustments
- High gain op amps
- Continuous current limit, adjustable 0-150%
- Gate pulse generating circuit - insensitive to phase sequence
- AC current unbalance and phase loss protection
- Front wiring and patented screw type terminals on printed circuit board. Boards removable without removing wiring
- No interaction between drive adjustments
Motor Armature Power Unit
- 6 thyristor full wave power converter
- 6 fast-acting fuses
- Gate pulse distribution matrix and amplifier
- Transient voltage filters
- Protective metal enclosure
Motor Field Power Supply
- Fast-acting fuses
- Solid state rectifier
- 150 volt or 300 volt field rating
Industrial Type Drive Motor
- Designed for use with static power supply
- Compatible with solid state coversion circuit
- 2500, 1750 or 1150 RPM
- Drip-Proof or Totally Enclosed (Note: Self ventilated motors have full torque capacity from 100% to approximately 75% of base speed. Supplementary ventilation or motor derating may be required to provide, rated torque over a wider speed range.
- Internal thermostat
- Rated 40° C ambient, 1.0 service factor
Operator Control Station - Oiltight
Performance
Controlled Speed Range - 0 to motor base speed with the standard regulation, tolerance of 2% of motor base speed over 20:1 range.
Speed Regulation - with armature voltage feedback and with 100% load change will be 2% of motor base speed, using I R compensation (may vary depending on motor characteristics and application).
Motor speed may drift 15% of base speed as a result of changes in voltage, frequency and temperature.
Refer to OPTIONS for improved speed regulation and wider speed range.
Current (Torque) Limit - Adjustable 0-150% of rated armature current.
Overload Capacity - 150% rated full load current for 60 seconds.
Acceleration (Linear) - Adjustable to 30 seconds max.
Efficiency (Power Converter) - 97%.
The efficiency of the complete drive, including the motor, is approximately 87% depending on motor base speed and enclosure.
Service Conditions
- Altitude - up to 3300 felt above sea level
- Ambient Temperature +10° to +40° C
- Line Voltage Variation -5 to +10% of rated voltage
- Line Frequency Variation ±1% of rated