Johnson Controls VSD Series User Manual page 73

Eaton Technology
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November 2009
Chapter 7 — Start-Up
Safety Precautions
Before start-up, observe the following warnings and safety instructions.
LIT-1201828
Internal components and circuit boards (except the isolated I/O
1
terminals) are at utility potential when the VSD Series drive is
connected to the line. This voltage is extremely dangerous and
may cause death or severe injury if you come in contact with it.
When the VSD Series drive is connected to the utility, the
2
motor connections U (T1), V (T2), W (T3) and DC-link/brake
resistor connections B–, B+ and R– are live even if the motor is
not running.
Do not make any connections when the VSD Series drive is
3
connected to the utility line.
Do not open the cover of the VSD Series drive immediately
4
after disconnecting power to the unit, because components
within the drive remain at a dangerous voltage potential for
some time. Wait until at least five minutes after the cooling fan
has stopped and the keypad or cover indicators are dark before
opening the VSD Series drive cover.
The control I/O terminals are isolated from the utility potential,
5
but relay outputs and other I/Os may have dangerous external
voltages connected even if power is disconnected from the
VSD Series drive.
Before connecting to the utility make sure that the cover of the
6
VSD Series drive is closed.
For more information visit: www.johnsoncontrols.com
WARNING
VSD Series Drives User Manual
7-1