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WEG Molded Case Circuit Breakers - User’s Manual
2
WARNING
Warning do not attempt to install or perform maintenance on equipment
while it is energized. Death, severe personal injury, or substantial property
damage can result fromcontact with energized equipment. Always verify
that no voltage is present before proceeding with the taskand always
follow generally accepted safety procedures.
WEG is not liable for the misapplication or misinstallation of its products.
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 WEG
experience and judgment, but should not be considered to be all-inclusive or
covering every application or circumstance which may arise. If any questions arise,
contact WEG for further information or instructions.
1. INTRODUCTION
1.1. GENERAL INFORMATION
The UBW2500 circuit breakers (Figure 1) have interchangeable electronic
trip units rated 2500 A maximum. Refer to Table 1 for all available trip
unit rating plug ratings. UBW2500 breakers are listed in accordance with
Underwriters Laboratories, Inc. Standard UL 489 and satisfy the requirements
of the International Electrotechnical Commission Recommendations
No. IEC 60947-2.
This instruction leaflet (IL) gives procedures for installation and field testing of UBW2500
circuit breakers. For this publication, the term circuit breaker shall also include the molded
case switch.
Figure 1:
UBW2500 circuit breaker frame with digitrip RMS trip unit installed
