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WEG Molded Case Circuit Breakers - User’s Manual
2
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 from contact with energized equipment. Always verify that no
voltage is present before proceeding with the task, and 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 UBW400 circuit breaker (Figure 1) are 600 V ac maximum rated. UBW400 circuit
breakers are listed in accordance with Underwriters Laboratories, Inc. Standard
UL 489 and satisfy the (P1) requirements of the International Electrotechnical Commission
Recommendations No. IEC 157-1.
Figure 1:
UBW400 circuit breaker frame
