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Allen-Bradley PowerFlex 7000 User Manual page 214

Medium voltage ac drive air-cooled (‘a’ frame) – forge control

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E-10

Preventative Maintenance Schedule

Rockwell Automation PowerFlex 7000 Drive Preventative Maintenance Schedule

Period Interval (Years)

Air-Cooling

Door Mounted Air Filters

System

Main Cooling Fan Motor

Redundant Cooling Fan Motor (if supplied)

Small Aux. Cooling Fans "Caravel"

Power Switching

Power Devices (SGCTs/SCRs)

Components

Snubber Resistors/Sharing Resistors/ HECS

Rectifier Snubber Capacitors

Inverter Snubber Capacitors

Integrated Gate Driver Power Supply

Self-Powered SGCT Power Supply (SPS)

Integral

Isolation Transformer/Line Reactor

Magnetics/Power

DC Link/CMC

Filters

Line/Motor Filter Capacitors

Control Cabinet

AC/DC and DC/DC Power Supplies

Components

Control Boards

Batteries (DCBs and CIB)

Battery Module (UPS)

Connections

Low Voltage Terminal Connections/

Plug-in Connections

Medium Voltage Connections

Heatsink Bolted Connections

Medium Voltage Connections (Rectifier)

Medium Voltage Connections (Inverter)

Enhancements

Firmware

Hardware

Operational

Parameters

Conditions

Variables

Application Concerns

Spare Parts

Inventory/Needs

(1) If filter supplied is not a washable type, replace filter. If filter supplied is a washable type, wash or replace (depending on state of filter).

(2) These components may be serviced while the VFD is running.

(3) When rectifier snubber capacitors are replaced, the MV connections for the rectifier need to be inspected.

(4) A 4-year rectifier snubber capacitor replacement interval applied only to drives with 6-pulse or 18-pulse rectifiers shipped before 2012 (rectifier snubber capacitors are blue). However,

current enhanced replacement rectifier snubber capacitors extend this to a 10-year replacement interval (replacement rectifier snubber capacitors are black). A 10-year rectifier snubber

capacitor replacement interval has always applied to drives with AFE rectifiers.

(5) When inverter snubber capacitors are replaced, the MV connections for the inverter need to be inspected.

(6) A 10-year inverter snubber capacitor replacement interval applies to all drive configurations.

(7) Replace UPS batteries annually for 50°C rated VFDs.

7000A-UM151E-EN-P - October 2018

11

(1) (2)

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7000 "A" Frame

20

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