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Rockwell Automation 140U Q, M frame CB Electronic RMS Trip Unit installation and operation User Manual

Warning

background image

Q and M-Frame Circuit Breakers

Instruction Leaflet for Electronic RMS Trip Unit Installation and Operation

Table

of Contents

Description

Page

1

General Information

...............................................

1

1.1

Protection

..............................................................

1

2.0

UL Listed Devices

..................................................

2

3.0

Installation

.............................................................

2

3.1

Preparation (All Trip Units)

.....................................

2

3.2

4-Pole Trip Unit Installation

.....................................

2

3.3

Ground Fault Trip Unit Installation

..........................

3

3.3.1

General

..................................................................

3

3.3.2

Installation

.............................................................

3

3.4
3.5
4.0
4.1
4.2
4.3
4.4
5.0
5.1
5.2
5.3
5.4
5.5
5.6
6.0
6.1
6.2

3-Pole (Non-Ground Fault) Trip Unit Installation

.....

5

Final Installation Instructions (All Trip Units)

...........

6

Principle of Operation

............................................

6

General

..................................................................

7

Overload Trip

.........................................................

7

Short

Trip

..............................

7

Ground Fault Protection

.........................................

7

Protection Settings

.................................................

7

General

..................................................................

7

Short Delay Pick-up Settings

.................................

7

Short Delay Time Settings

.....................................

7

Instantaneous Pickup Setting

................................

7

Ground Fault Pick-up Setting

.................................

7

Ground Fault Time Settings

...................................

8

Testing

...................................................................

8

Functional Field Testing

.........................................

8

Performance Testing for Ground Fault Trip Units

....

8

6.2.1

Code Requirements

...............................................

8

6.2.2

Standards Requirements

.......................................

9

6.2.3

General Test Instructions

.......................................

9

7.0

Rating Plug

..........................................................

12

8.0

References

..........................................................

12

8.1

Q-Frame Molded Case
Circuit Breakers

...................................................

12

8.2

Internal Accessories

............................................

12

PRESENT BEFORE PROCEEDING

AND ALWAYS FOLLOW GENERALLY ACCEPTED
SAFETY PROCEDURES.

MISAPPLICATION

OR MISINSTALLATION OF ITS

PRODUCTS.

ALLEN-BRADLEY

IS NOT LIABLE FOR THE

The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of personnel
and equipment as well as all general and local health and
safety laws, codes, and procedures.

The recommendations and information contained herein
are based on Allen-Bradley experience and judgement,

but should not be considered to be all-inclusive or cover-
ing every application or circumstance which may arise. If
any questions arise, contact Allen-Bradley for further
information or instructions.

Fig. 1 Electronic RMS Trip Unit

for 3-Pole Q-Frame &

M Frame Circuit Breaker

1 GENERAL INFORMATION

A

WARNING

DEATH, SEVERE PERSONAL INJURY,

OR

SUBSTANTIAL PROPERTY DAMAGE CAN RESULT

FROM CONTACT WITH ENERGIZED EQUIPMENT. DO
NOT

INSTALL

OR PERFORM

MAINTENANCE ON EQUIPMENT WHILE IT

IS

ENERGIZED. ALWAYS VERIFY THAT NO VOLTAGE

IS

1.1 Protection

The Electronic RMS, illustrated in Figure 1, is an elec-
tronic trip unit that incorporates a microprocessor-based
custom application specific integrated circuit design for

use with Q-Frame and M Frame Molded Case
Circuit Breakers.

The Electronic RMS Trip Unit provides true RMS current
sensing for proper correlation with thermal characteristics of
conductors and equipment. Interchangeable rating plugs

40752-072(2)

Effective

6/02

Bul. 140U