
Overview
10 VFDB-SVX001C-EN
– Apply the Lockout-Tagout device(s) and lock(s).
– The drive cabinet doors are locked and the input power
control box must remain closed when de-energizing the
MV power source.
•Placing the control, handle or switch in the “Off”
position should de-energized the power only down
stream from the cabinet.
•Medium voltage power remains energized
upstream of the control, handle or switch.
• Use a properly rated meter to verify the medium voltage
power on the downstream side of the drive/disconnect/
breaker is de-energized.
– Follow meter test procedures to confirm the meter is
reading accurately prior to verifying de-energization.
Important:
•Before servicing, disconnect all power sources and allow
at least 20 minutes for capacitors to discharge.
•All electrical enclosures-unit or remote-are IP2X.
• Remove the key from the de-energized drive/disconnect/
breaker and use the key control procedure to open the MV
cabinet access door(s).
• Use a medium voltage rated Potential Indicator tool (“hot
stick”) to confirm the medium voltage power inside the
PowerFlex 6000T cabinet is de-energized.
– Follow Potential Indicator tool test procedures to
confirm the tool is working properly prior to verifying de-
energization.
• The PPE for medium voltage safety can only be removed
once the MV power de-energization is verified and
confirmed. The PPE for control voltage can only be
removed once the control voltage de-energization is
verified.
Control Voltage Power De-
energization
Note: For questions regarding these procedures, contact
your local Trane or Rockwell office.
• Wear the PPE that is necessary to protect from the shock
and arc flash hazards.
• Disconnect the control voltage. Apply the lockout lock(s)
and/or the tagout device(s).
• Identify the PowerFlex 6000T cabinet control power
supply.
– The source may be a disconnect switch on an electric
circuit, an input contactor mounted on the side of the
cabinet or similar power disconnect device.
– Identify other sources of control voltage by reviewing
the system drawings and looking at the equipment for
secondary power sources.
• Some cabinets are equipped with a UPS battery backup
120 volt AC power supply for control voltage.
WARNING
Hazardous Voltage w/Capacitors!
Failure to follow instructions below could result in
death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. If this equipment is interlocked with other
equipment, 115 volt AC may be present in the cabinet
even though the main power is disconnected. Interlock
signals must be deactivated by qualified personnel
prior to any work in the cabinet.
Verify with an appropriate voltmeter that all capacitors
have discharged, and interlock signals have been
deactivated from all circuits.
WARNING
Capacitors Must be Allowed to
Discharge!
Failure to follow instructions below could result in
death or serious injury.
Each time power is removed, allow at least 20 minutes
for DC units to discharge after power is disconnected
before servicing. Use extreme caution when applying
power. Equipment terminals and other internal parts of
the controller are at line voltage when ac power is
connected to the controller. All ungrounded
conductors of the ac power line must be disconnected
from the controller before it is safe to touch any
internal parts of this equipment.
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.