Connection
7.7 Connection of 3WT8 air circuit breakers
3KC ATC6500 transfer control device
Manual, 05/2019, L1V30538268002A-01
135
7.7.2
Transfer between three 3WT8 air circuit breakers, with electrical interlock
The following diagram applies for the applications 2S-1T-PL and 2S-NPL:
You can find more information on the applications in chapter Load management with the
Code
Description
BRK 1
3WT8 air circuit breaker for Source 1
BRK2
3WT8 air circuit breaker for Source 2
TB
3WT8 air circuit breaker as tie breaker
S2
Auxiliary switch (for electrical interlocking)
S11
Auxiliary switch (status)
S1
Alarm auxiliary switch (trip)
F1
Auxiliary release (shunt trip) F1
Y1
Closing coil Y1
M
Motor operator
Note
IEC regulations
According to IEC regulations, the fusible element must be connected via a cable compliant
with IEC 61439-1 which is protected against ground faults and short circuits. To this end,
please observe the applicable national standards for electrical installations.