Siemens SENTRON 3WL10 - Power Supply, Grounding, and Connection

2 circuit breakers per panel width section in the switchboard
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 Circuit breaker power with rear terminals for main circuit con‐
nection
Horizontally oriented Vertically oriented
I
u
[A]
Busbar
connection
[mm]
Com‐
part‐
ment
Ambient temperature Ambient temperature
35 °C 45 °C 55 °C 35 °C 45 °C 55 °C
630 2 x 40 x 5 2 630 A 630 A 630 A 630 A 630 A 630 A
1 630 A 630 A 630 A 630 A 630 A 630 A
800 2 x 50 x 5 2 800 A 800 A 800 A 800 A 800 A 800 A
1 800 A 800 A 800 A 800 A 800 A 800 A
1000 2 x 50 x 10 /
2 x 50 x 8
1)
2 1000 A 960 A 920 A 1000 A 1000 A 970 A
1 970 A 930 A 900 A 1000 A 1000 A 950 A
1250 2 x 50 x 10 /
2 x 50 x 8
1)
2 1250 A 1200 A 1140 A 1250 A 1250 A 1200 A
1 1200 A 1150 A 1100 A 1250 A 1250 A 1150 A
1)
Horizontally oriented: 2 x 50 x 10 mm / vertically oriented: 2 x 50 x 8 mm
You will 󹪝nd information about the terminals used in Chapter Accessories for connection and
insulation (Page87).
All other types of connection described (󹪝xed-mounted and withdrawable) can be assumed
analogously with the horizontal rear terminals.
4.2 Power supply, grounding, and connection
The circuit breaker can be powered through the main circuit connection terminals. The
electronic trip unit is therefore self-powered in all phases via internal current transformers in
compliance with the standard to ensure its protection function without additional conditions in
the event of a fault.
Even if, with open main contacts, the electronic components ETU, metering function, and
CB bus modules are operated or protection functions, such as MCR or G_ret are activated
(e.g. for communication of circuit breaker status, applied line voltage signal etc.), these
components can be externally powered via the auxiliary voltage.
The external power supply can be achieved in two ways:
• The Breaker Connect module is mainly used for this and the auxiliary power supply of the
control panel can be connected directly to it. The auxiliary power supply is always necessary
for the communication function.
• As a further option, the MF Advanced metering module can be used. If the voltage is tapped
internally on the line side with the contacts open, this can also be used to power the
electronics directly and independently.
If a metering module is present, the voltage taps must be installed on the line side. In the
circuit breaker OPEN position, this also ensures that all relevant information is available.
Application planning
4.2Power supply, grounding, and connection
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
140 Equipment Manual, 10/2023, L1V30499596002-03