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> Abb ach-550-vc 480V hvac e-bypass control
Abb ach-550-vc 480V hvac e-bypass control
ABB is the #1 drives supplier to the VFD market worldwide.
DON T LOSE CONTROL JUST BECAUSE YOU CHOOSE TO GO TO BYPASS!
truly intelligent . Features like selectable class 20 or 30 overload curves, underload (broken belt) trip, singlephase protection, selectable manual or automatic bypass, fi reman s override and damper control.
upon a run command to open a damper such as an outdoor air damper, fi re damper, isolation damper, etc. before the motor is allowed to operate in drive or bypass regardless of the source of the run
command. When the damper is fully open, a normally open dry contact closes and allows the motor to operate. A dedicated input is provided for safety interlocks such as fi restats, smoke detectors, etc. When
this contact opens, the motor stops (in drive or bypass mode) and the damper is commanded to close. The HVAC Enhanced E-Bypass has two Override modes of operation for critical control situations. The
Fireman s Override accepts a normally open dry contact that forces the motor to run in bypass and ignores all other keypad, internal and external commands. Fireman s Override is designed for Run to
Destruction operation. The second mode, Bypass Override, forces the motor to start in bypass and ignores keypad commands, but still accepts external and internal safety interlocks. Another industry first
from ABB is the ability to monitor VFD/Bypass mode of operation, the status of the bypass HO- A switch, bypass fault and fi reman s override status over serial communication. The serial link can also force
the motor into bypass! All of these features are in one of the industry s smallest packages! ABB also offers a variety of enclosure solutions, including NEMA 3R outdoor enclosures. ABB can also provide
passive, active and multi-pulse harmonic solutions for your most demanding applications.
Interlocked Output and Bypass Contactors Selectable Auto Bypass Function 24Vdc Control Power 24 VDC Interface 120 VAC Inputs Keypad Drive Operator Panel
Keypad Bypass Operator Panel Drive Fuses Bypass Voltage Tolerance Adjustable Overload in Bypass OL Class 20/30 Selectable Adjustable Underload in Bypass
Dedicated Safeties Input Single Phase Protection Damper Endswitch Permissive Fireman s Override Damper Actuator Output Bypass (monitor and control)
Serial Communication Capabilities
Power On System Enabled Drive Selected Bypass Selected Drive Running Bypass Running Drive Fault Bypass Fault Bypass HOA Automatic
System Run Drive Fault Bypass Fault Bypass HOA System Started Bypass/Override Selected
