Rectifiers

Direct current is required to operate the PRECIMA spring-applied brakes. 
If required, we therefore supply suitable rectifiers according to your requirements.

Direct current can be provided by:

• Direct supply (battery, DC mains, etc.)
• Half-wave or bridge rectifier
• Fast excitation rectifier 

Our types and designations:

• PMB – bridge rectifier
• PMBAF – bridge rectifier with overvoltage protection and cage clamp:
  The bridge rectifier generates an optimal DC voltage and is available for AC or DC switching.
• PME – half-wave rectifier
• PMEA – half-wave rectifier with overvoltage protection
• PMEAF – half-wave rectifier with overvoltage protection and cage clamp:
  The half-wave rectifier halves the required coil voltage, is inexpensive and can be supplied for AC or DC switching.
• PMG – fast excitation rectifier:
  The fast excitation rectifier is recommended where short ventilation times and low power losses are required.
  It combines the advantages of half-wave and bridge rectifiers.
• PMGU – fast excitation rectifier with quick shutdown:
  The fast excitation rectifier expands the range of functions of the
  Standard PMG rectifier for fast shutdown and the Setting the overexcitation time (variant dependent).
• PMRU – quick shutdown device:
  The rapid shutdown device is used in addition to a rectifier to achieve faster brake application.
• PMS – current detection relay:
  The current detection relay is used to switch the spring-applied brake on the DC side if there is no neutral conductor to the motor.