TAVRIDA ELECTRIC VCB Series, User Manual

Page: 60 / 142

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
“e-f” – switching module turns to “open and locked” position (point “f”);

“f-a” – turning switching module to “unlatched” position (point “a”).

“g-h” -- electrical interlock action.
The allowed deviations are indicated by hatching.
For ISM15_Shell_2 interlocking shaft torque is as follows:
When ISM15_Shell_2 is closed and interlocking shaft is counterclockwise rotated:
where:

zone 1
– zone where electrical
interlock microswitch is opened;

zone 2
– zone where manual trip is
occurred .
Figure 105
ISM15_Shell_2 interlocking shaft torque when ISM is closed
When ISM15_Shell_2 is open and interlocking shaft is rotated from the „open and locked“ to
„unlatched“ position and vice versa:
Figure 106
ISM15_Shell_2 interlocking shaft torque when ISM is open
Torque on the interlocking shaft for ISM manual trip
The torque on the interlocking shaft for ISM manual trip shall be:

for ISM15_LD_8, MD_1, MD_3 and ISM15_HD_1 - no more than 3.5 N*m;

for ISM15_Shell_2 - no more than 4 N*m.
Load capacity of ISM15_LD_8, MD_1, MD_3, SHELL_2, HD_1 interlocking
shaft

The angle of the interlocking shaft rotation shall not exceed 90 º.
Exceeding any of the above limitations can lead to damage of the interlocking mechanism.