Siemens 3AH3, Operating Instructions Manual

Page: 37 / 64

Description
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2013-08-22
Switching times
Fig. 50 Switching times
Closing time = period between starting (command) of the closing movement and
the moment of contact touch in all poles.
Opening time = period between starting (command) of the opening movement and
opening of the last pole.
Arcing time = period from the start of the first arc to extinction of the arcs in all poles.
Break-time = period between starting (command) of the opening movement and
extinction of the arc in the last pole to become extinct (= opening time + arcing time).
Close/Open time = period in an OPEN/CLOSE cycle between the moment of con-
tact touch in the first pole during closing and the time when contact touch has been
cancelled in all poles during subsequent opening.
Dead-time = period from the end of the current flow in all poles up to the start of cur-
rent flow in the first pole.
Closing time < 75 ms
Opening time
1. shunt release (Y1) < 60 ms
2. and 3rd release (Y2, Y4, Y6, Y7) < 55 ms
Arcing time < 15 ms
Break time
1. shunt release (Y1) < 75 ms
2. and 3rd release (Y2, Y4, Y6, Y7) < 70 ms
Dead time 300 ms
Close/Open time
1. shunt release (Y1) < 90 ms
2. and 3rd release (Y2, Y4, Y6, Y7) < 70 ms
Minimum command duration
Closing solenoid (Y9) 45 ms
1. shunt release (Y1) 40 ms
2. and 3rd release (Y2, Y4, Y6, Y7) 20 ms
Shortest pulse time for breaker tripping signal
1. shunt release (Y1) > 15 ms
2. and 3rd release (Y2, Y4, Y6, Y7) > 10 ms
Charging time if actuated electrically (M1) < 15 s
Synchronous operation error between the poles
≤
2 ms
Siemens Parts