TAVRIDA ELECTRIC VCB Series, User Manual

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c) Fix Det_Holder_22 on the CBdet_Shaft_1 with StandDet_Bolt_DIN933(M6_20_Fe88-Zn)
Figure 96
Interlocking lever assembly design for three phase ISM
An electrical interlock can be provided by connecting the ISM actuator coil in series with the contacts of a
position switch of the relevant device (disconnector or draw-out truck, etc.) as shown in the Figure 97.
AC
— actuator coil;
PS
— position switch with
current not less than 10 A;
R
— resistor 22 kOhm±5%,
average power 0.15 W, peak
power 8 W
Figure 97
Electrical interlock diagram
The position switch must be positively driven in both directions and must fully operate before the interlocked
ISM starts to move to
its alternative position. Resistor ‚R‘ is used to prevent the CM alarm “Actuator Coil
Isolated“ while position switch PS is open.
ISM15_LD_8, MD_1, MD_3, SHELL_2, HD_1 interlocks
Interlocking mechanism
Each of ISM15_LD_8, MD_1, MD_3, SHELL_2, HD_1 is equipped with an interlocking shaft that can be rotated
clockwise to the “unlatched“ position or counter-clockwise to the “open and locked“ position. In the
“unlatched“ position the ISM can perform “close” and “open” operations.
In the “open and locked” position the ISM the interlocking shaft prevents the actuator mechanically from
closing. In addition the actuator coils are disconnected from the CM.
If the ISM is closed, rotation of the interlocking shaft from “unlatched” to “open and locked” position leads to
manual tripping. The CM indicates alarm “Manual Trip”.
The interlocking shaft of ISM15_Shell is fi
xed in the „open and locked“ position. To return it in the
„unlatched“ position the opposite direction force shall be applied to the shaft as shown in the Figure 100. The
interlocking shafts of ISM15_LD_8, MD_1, MD_3,HD_1 are not fi
xed in the „open and locked“ position since
these ISMs have shaft return spring that returns
them back to the „unlatched“ position. To leave their shafts in
the „open and locked“ position the external force shall be applied to the shaft to hold it in this position as shown
in the Figure 100.