beautypg.com

Bolt-on fuse removal/installation, Clip-on fuse removal/installation – Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure User Manual

Page 59

background image

Rockwell Automation Publication 1500-UM055G-EN-P - May 2013

51

Maintenance

Chapter 5

Bolt-on Fuse Removal/Installation

Tools required: 3/8-in. drive ratchet, 2-in. extension, 6-in. extension, 12-in.
extension, 1/2-in. socket, 3/8-in. drive torque wrench.

1. Remove the two lower mounting nuts, lock and flat washers from the

mounting studs.

2. Remove the upper two mounting nuts, lock and flat washers from the

mounting studs and remove the fuse from the fuse mounting studs.

3. Install the replacement fuse on the four mounting studs, hold the fuse in

place and install the upper two flat washers, lock washers and nuts. Torque
nuts to 15 N•m (12 lb•ft).

4. Install the lower two flat washers, lock washers and nuts. Torque nuts to

15 N•m (12 lb•ft).

5. If interphase barriers were previously removed ensure they are properly

reinstalled.

Clip-on Fuse Removal/Installation

Recommended tool: Fuse extractor part # 80144-491-02 (optional)

1. Place the cup section of the fuse extractor over the top of the fuse.

2. Pull back on fuse extractor with a quick motion to dislodge the upper

portion of the fuse from top fuse clip.

3. Set fuse extractor aside.

4. Remove the lower portion of the fuse from fuse clip by pulling up and

slightly rotating the fuse in one entire movement.

5. To install the replacement fuse, place the fuse between the fuse clips.

TIP

The main power fuse has a pop up indicator pin located at one end of the fuse.
When a fuse has opened, the indicator will be in its extended position. The fuse
should be oriented in the fuse clip assembly so that the indicator is at the top.

ATTENTION: The fuses may be hot for up to one hour after operating. Verify the
temperature before handling and use insulated hand protection if needed.
Failure to do so may result in burns.

TIP

The fuse configuration will determine what length of extension will be
required to get at the mounting hardware. The fuse configuration will also
determine what size of interphase barriers are installed, the lower barriers can
be removed to provide better access to the fuse mounting nuts.

TIP

The interphase barriers located at the bottom of the fuse assembly can be
removed to ease the removal and installation of the fuse.