Installation; Application; Bypass Features And Functions - ABB ACQ550-U1-015A-4 Series User Manual

4

Installation

Study these installation instructions carefully before proceeding. Failure to observe
the warnings and instructions may cause a malfunction or personal hazard.
WARNING! Before you begin read "Safety" on page 1.
WARNING! When the ACQ550 with Bypass is connected to the line power, the
Motor Terminals T1, T2, and T3 are live even if the motor is not running. Do not
make any connections when the ACQ550 with Bypass is connected to the line.
Disconnect and lock out power to the drive before servicing the drive. Failure
to disconnect power may cause serious injury or death.

Application

This manual is a supplement to the ACQ550-U1 User's Manual and documents
Bypass configurations.

Bypass Features and Functions

The ACQ550 with Bypass is an ACQ550 AC adjustable frequency drive in an
integrated UL Type/NEMA 1, UL Type/NEMA 12, or UL Type/NEMA 3R package
with a bypass function configured entirely of standard industrial control components.
The ACQ550 with Bypass provides:
• Main circuit breaker with door mounted control lever. The lever can be padlocked
in the OFF position (padlock not supplied).
• Electrically interlocked Bypass and drive output contactors
• Class 20 motor overload protection.
• ACQ-CP-AQ drive control panel
– Cover mounted - UL Type/NEMA 1 and 12 enclosures
– Drive mounted - UL Type/NEMA 3R enclosures
• Bypass cover mounted control
– Drive-Off-Bypass selector switch
• Provisions for external control connections.
• Optional drive service switch (drive input disconnect), the functional equivalent of
a three-contactor bypass arrangement.
Installation
ACQ550-CC Packaged Drive with Bypass