EFC Electronic Frequency Control

Continuously variable speed control using frequency converter technology

Optionally available for all Pluscom compressors HG(HA)12P, 22P, 34P

With the EFC system Bock offers the most efficient means of adapting the capacity of the compressor to current refrigeration plant requirements: “Progressively adjustable speed control using frequency converter technology“.

Up to 25 % less power consumption!

The equipment is compactly mounted on the compressor, wired and connected ready for use. It is activated by a pressure transducer mounted on the suction side. The adjustment range can be set individually.

Thanks to the oil pump lubrication, Pluscom compressors are ideal for speed control, in particular also for low frequencies.


The advantages:

• Supplied wired and adjusted ready for connection
• Compact mounting on the compressor
• Fully variable adjustment of the refrigerating capacity on demand
• Up to 25% less power consumption
• Reduced mechanical compressor load for longer service life
• Always optimum machine pressures and operating conditions
• Lower pressure losses in the heat exchangers
• Lower cooling down and heating up losses throughout the system
• Control module also included for simple adjustment of the EFC-System
• Reduced start-up current at full torque
• With the auxiliary module ERC4 also suitable for racks

Further savings:

• No additional parts required
• No high energy, high-wear start/stop operation
• No additional wiring required
• No programming necessary
• Takes up no space in the switchboard
• Part windings and star-delta circuits no longer required
• Needs no screened supply lines to the compressor