7
AT.654254.050 ver.1.0
Troubleshooting manual
Safety requirements and personnel qualification
All the activities on installation, mounting, dismantling, operation and mainte-
nance of a Variable Speed Drive must be carried out in conformity with effective
local and electrical codes and regulations. Improper installation and operation of
the drive may result in personal injury or equipment damage. There is a deadly
level of voltage in drive’s cabinet. When working on installation, maintenance, re-
pair, it is vital to monitor the absence of voltage at the input and output terminals
of VSD.
Before start working with VSD the staff must:
•
be specially trained and examined in labor protection issues;
•
attend a preliminary medical examination (when hired for work) and peri-
odic health examinations (during the entire labor activity);
•
have electrical safety qualification.
At conducting connection to the power supply line there a special attention
must be paid to ensuring of reliable grounding of VSD casing. Grounding re-
sistance must meet the local and national requirements.
At executing any work inside Variable Speed Drive the following safety
measures must be performed:
•
circuit breaker ON/OFF must be placed to
«
OFF
» position;
•
leading-in cables must be de-energized;
•
warning tags must be put «
ON
»;
•
make sure that leading-in cables are
de-ener-
gized
and ground them.
*
–
circuit breaker handle may change place in different
VSD’s types.
ATTENTION! Filter power capacitors conserve the charge hazardous to
life within 5 minutes after de-energization! Prior to execution of work
inside the cabinet make sure that capacitors are de-energized. Filter
power capacitors conserve the charge hazardous to life within 5
minutes after de-energization!
ATTENTION! It is prohibited to disconnect and connect detachable
joints if supply voltage is available. Electronic control units of Variable
Speed Drives contain components made on the basis of metal-oxide-
semiconductor (MOS) technology excluding the action of static
electricity. If you need to touch some MOS component, ground your
body and the tools to be used.
