Drive & Automation with SIEMENS

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Analog DC Drive

DC Drives manufactured by us are highly sophisticated and features provided are rarely available in its contemporary system

Features:

Enhance performance by advance technique such as:

  • Phase Locked Loop (PLL) ensure flawless synchronization despite polluted mains and compensates for mains voltage variation
  • C.T. Operated field protection to make a precise tripping
  • Train of firing pulses by using ferrite core transformers ensure reliable triggering of thyristor
  • Adaptive regular gives optimum response under varying load conditions
  • speed amplifier has facility for external current limit
  • Current amplifier has facility for external current reference
  • A trip relay with electrical latch provides interlock with motor
  • The control card incorporated LED monitoring to assist in rapid fault diagnosis
  • Provision to monitor the selected points via PLC
  • Designed for larger power supply variations
  • To eliminate the Re-Tuning of control card, adjustments and terminal row for external connection broght to a separate card
  • Flat ribbon cable eliminates cumbersome conventional wiring to facilitate quick replacement

Control Facilities:

  • Linear acceleration / deceleration ramp provides independent adjustment of an acceleration and deceleration rates over a range of 2 - 30 Sec. If not required can be linked out
  • Minimum speed adjustment
  • Maximum speed adjustment
  • Current limit
  • Jogging / Inching
  • Motor overload adjustment
    • 200% of full load current at 10 Sec.
    • 150% of full load current at 20 Sec.
    • 125% of full load current at 40 Sec.
    • 100% of full load current no tripping
  • Motor Stability
  • Speed gain

LED indications to fault diagnosis:

• +15V / -15V
• Drive Trip
• Motor Off
• Feedback Loss
• Field Loss (CT operated)
• Phase Loss / Reverse
• Overload • Current Limit
• Internal Fault

Operating Data:

Input AC Supply  :  3 Ph. 415V AC ±10%
  :  50 Hz. Limit 47 - 62 Hz
Output Voltage  :  0 - 440V DC to Armature
  :  220V DC to Field
Ambient Temp   :   45° C
Humidity  :   95% Max. Non Condensing