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Timing alarms
Alarm thresholds can be set for the following measured items:
Opening - (all CB)
• Minimum and maximum Reaction time (t1), per pole
• Minimum and maximum Operation time (t2), per pole
• Minimum and maximum Travel time (t2-t1), per pole
• Minimum contact separation speed, per pole
Opening - (IPO CB only)
• Maximum t1 pole to pole discordance
• Maximum t2 pole to pole discordance
• Maximum t2-t1 pole to pole discordance
Closing - (all CB)
• Minimum and maximum Reaction time (t1), per pole
• Minimum and maximum Operation time (t2), per pole
• Minimum and maximum Travel time (t2-t1), per pole
Closing – (IPO CB only)
• Maximum t1 pole to pole discordance
• Maximum t2 pole to pole discordance
• Maximum t2-t1 pole to pole discordance
The threshold values can be entered during setup here:
HMI: Settings/Opening and Settings/Closing
An alarm is raised if, for any of the poles, the measured/calculated value during an opening
or closing operation is found to be beyond the thresholds set (i.e. below the minimum value
or above the maximum value set).
MA-037 - CB Watch 3 Operating Manual
Figure 44 – Operation timing alarms thresholds
v7.0 - May 2020
Page 32 of 118
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