Rockwell Automation 2100M User Manual

Installation Instructions

Replacing the Unit Interlock for CENTERLINE
2100 Motor Control Centers

Catalog Numbers 2100H-UNTLK1, 2100H-UNTLK2,
2100H-UNTLK3, 2100H-UNTLK4, 2100H-UNTLK5, 2100H-UNTLK6

Topic Page

About This Publication 1
Replacing the Unit Interlock 2
Remove the Interlock from the Unit 2

About This Publication

Install the Interlock in the Unit 5
Additional Resources 7

This document provides information on how to remove and install the
unit interlock on the following units.

Interlock with Corresponding Units

Kit Cat. No. Used with Unit

2100H-UNTLK1 Plug-in units with 200 A disconnect switch
2100H-UNTLK2 Plug-in units with 400 A disconnect switch
2100H-UNTLK3 Plug-in units with 250 A or 400 A frame circuit breaker and single

stab assembly

2100H-UNTLK4 Plug-in units with 250 A or 400 A frame circuit breaker and

dual-power stab assembly
2100H-UNTLK5 Plug-in units with 600 A frame circuit breaker
2100H-UNTLK6 Plug-in units with 400 A LA-tripac circuit breaker

Refer to page 2

for an illustration of the interlocks.

2 Replacing the Unit Interlock for CENTERLINE 2100 Motor Control Centers

Interlock Kit

2100H-UNTLK1
Interlock

2100H-UNTLK2
Interlock

2100H-UNTLK3 and
2100H-UNTLK4
Interlock

2100H-UNTLK5
Interlock

2100H-UNTLK6
Interlock

Replacing the Unit Interlock

Remove the Interlock from the Unit

The following sections provide information on how to remove and
install your unit interlock after removing the unit from the
CENTERLINE 2100 Motor Control Center (MCC).

ATTENTION

When working on or near energized electrical equipment, follow
established electrical safety-related work practices. Refer to NFPA
70E Standard for Electrical Safety in the Workplace.

We recommend that maintenance performed on the MCC units be
performed away from the MCC in a suitable work area.

Follow this procedure to remove the interlock from the unit. Refer to
the CENTERLINE 2100 Low Voltage Motor Control Centers Instruction
Manual, publication 2100-IN012

, for information on removing power

and removing the unit from the MCC.

1. Remove power from the unit.

ATTENTION

To prevent personal injury or damage to equipment, make sure the
unit handle is in the OFF/O position before removing the unit. Serious
injury or death can result from working on energized MCCs.

Publication 2100-IN068A-EN-P - July 2009

Replacing the Unit Interlock for CENTERLINE 2100 Motor Control Centers 3

2. Remove the unit from the MCC.

ATTENTION

Plug-in MCC units may be heavy or awkward to handle. Use an
assistant or a platform lift device if necessary to help you handle the
unit.

3. Loosen the taptight on the side of the unit, if used, to be able to

remove the interlock from the unit.

A taptight is not required for units that use interlock kit numbers
2100H-UNTLK3 and 2100H-UNTLK4.

Taptight Location
(if used)

4. Compress the tab on the interlock to make the tab flush with the

rest of the interlock.

Interlock Tab

Interlock

Publication 2100-IN068A-EN-P - July 2009