Chapter 4 - Start-Up Procedure; Safety Precautions - ABB ACS 501 Installation & Start-Up Manual

Safety Precautions

ACS 501 Installation & Start-up Manual
Chapter 4 – Start-up Procedure
This chapter explains how to inspect the installation and how to start-up the
ACS 501. Prerequisite information required for start-up was provided in
Chapter 2 – Overview of the ACS 501.
Before start-up, observe the following:
The Motor Control Card (bottom card) is at DC bus potential (1.35 x V
when the ACS 501 is connected to supply voltage. This voltage is extremely
dangerous and can cause death or serious injury.
When the supply voltage is disconnected from the input terminal block X1, it
will take about five minutes before the DC bus capacitors are discharged to a
safe voltage.
To ensure that the voltage level is safe, measure the voltage between positive
(+) and negative (-) on Terminal Block X2, labeled "Brake." Meter must be
rated for 1000 VDC.
Note: If the internal brake option is installed, measure between the input
terminal block X1 and positive (+) on Terminal Block X2. Meter must
be rated for 1000 VDC.
The Control Interface Card and Option Cards are isolated from the main
circuit, but dangerous voltages may be present at relay contact terminals.
Always check for high voltage at Terminals X50:21 – 29 before working on
the Control Interface or Option Cards.
WARNING! When the ACS 501 is connected to the line power, the Motor
Terminals U , V , and W
2 2
make any connections when the ACS 501 is connected to the line. Disconnect
and lock out power to the drive before servicing the drive. Failure to
disconnect power may cause death or serious injury.
Figure 4-1 shows the start-up checklist.
are live even if the motor is not running. Do not
2
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IN
4-1