R
EPLACEMENT KIT INSTRUCTIONS
Power Fuse Assembly Replacement
(for 3000A 1395 DC Drives)
Contents This document shows how to remove and replace a power fuse
assembly (and how to replace indiv idua l fuses) in a 3000A 1395 DC
drive.
What This Kit Contains Using the table below, verify that you have rece ived the appropriate
items in your kit:
For this part: You should receive this quantity:
power fuse assembly 1
Other Items Needed Before you begin, be sure you also have the following:
• T ools needed for:
• Loosening, removing, and tighte ning bolts (ratchet with
extension, 9/16” and 3/4” sockets)
• Torquing bolts (torque wrench for 25–45 lb-ft)
• T esting for voltage (voltmeter or multimeter)
• Documentation:
• Your drive system schematics
• Publication 1395-5.40, Bulletin 1395 Digital DC Drive–
User Manual
• Publication 2 361-5.01 , Bullet in 1395 Digital DC Drive in
Bulletin 2361 Motor Control Center for Drive Systems–
User Manual
2 Power Fuse Assembly Replacement (for 3000A 1395 DC Drives)
Safety Precautions The following general preca utions apply when working on drives:
ATTENTION: Only those familiar with the drive
system, the products used in the system, and the
!
associated machinery should plan or implement the
installation, startup, and future maintenance of the
system. Failure to comply can r esult in persona l injury
and/or equipment damage.
ATTENTION: Verify that all sources of AC and DC
power are deenergized and locked out or tagged out in
accordance with the requirements of ANSI/ NFP A 70E,
Part II.
ATTENTION: The system may contain store d energy
devices. T o avoid the hazard of electric al shock, verif y
that all voltage on capac itors has been discharged before
attempting to service, repair , or remove a drive system
or its components. You should only attempt the
procedures in this manual if you are qualified to do so
and are familiar with solid-state contr ol equipment and
the safety procedures in publication NFPA 70E.
ATTENTION: When servicing any unit, do not drop
any nuts, bolts, washe rs, etc. inside the unit, as they may
cause a short circuit on power up.
ATTENTION: This drive system contains ESD
(Electrostatic Discharge) sensitive parts and
assemblies. Static contr ol precautions are required
when installing, testing, or repairing this assembly.
Component damage can result if ESD control
procedures are not followed. If you are not familiar with
static control procedures, refer to Rockwell Automation
publication 8000-4. 5.2, Guardi ng Against Electr ostatic
Damage or any other applicable ESD protection
handbook.
Special Instructions Importa nt: You will need to reuse parts that are removed from the
drive. Place parts, in the order removed, on a clean
surface.
Importa nt: Some washers, such as clamp and Belleville washers,
have only one correct orientation.
Publication 2361-5.20 - May 1998
Power Fuse Assembly Replacement (for 3000A 1395 DC Drives) 3
Preliminary Steps Before replacing the fuse assembly, shut off the drive power, wait
five minutes for the voltage to discharge, open the fuse bay door, and
remove all Lexan™ guards shielding the fuse as semblies.
Removing the Assembly 1. Using a voltmeter, test the voltage across the three phases, then
across the fuse assembly.
ATTENTION: If there is any volta ge present, remove
the source of the voltage and check for voltages again
!
2. Remove the four nuts (and washers) from the front of the assem-
bly.
3. Remove the four bolts (and washers) from the rear of the assem-
bly.
before proceeding to the next step.
Replacing the Fuses in the
Assembly (Optional)
If you are installing a new fuse assembly, you can skip to the next
section. Otherwise, you can replace the individual fuses with the
following instructions.
1. Remove the two bolts on the fuse and pull out the fuse.
2. Align the new fuse into the assembly as shown in the diagram.
3. Fasten the two fuse mounting bolts and torque to 45 lb-ft.
4. Replace the other two fuses.
Importa nt: If one fuse in the assembly is blown or weak, all three
fuses need to be replaced. Ensure tha t all three fus es in
the assem bly are o f the s am e type, size, and
manufacturer.
Publication 2361-5.20 - May 1998
4 Power Fuse Assembly Replacement (for 3000A 1395 DC Drives)
Removing the Assembly Replacing Fuses
3
Label on
bottom of
fuse
2
Publication 2361-5.20 - May 1998
Power Fuse Assembly Replacement (for 3000A 1395 DC Drives) 5
Installing the Assembly 1. Place the assembly into the drive, over the four mounting bolts.
2. Fasten the four bolts (with washers) to the rear of the assembly.
3. Fasten the four nuts (with washers) to the front of the assembly.
4. T orque the nuts and bolts to 25 lb-ft.
Concluding Steps After installi ng the assembly, replace all Lexan shielding and secure
the fuse bay door. Dispose of old parts according to your company
proceduress and local ordinances.
Publication 2361-5.20 - May 1998
Lexan is a trademark of General Electric Corp.
Publication 2361-5.20 - May 1998 P/N 185429
1998 Rockwell International. All Rights Reserved. Printed in USA
Loading...