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

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