3WL air circuit breakers
3.7 External current consumption with CubicleBUS
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
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Table 3- 22 Calculating the power consumption of the CubicleBUS modules for SENTRON WL with
CubicleBUS system
CubicleBUS module
Number of
modules per
CubicleBUS
Max. continuous
current per module
from the
CubicleBUS
Max. start-up
current per module
from the
CubicleBUS
ETU45B trip unit
1
120 mA
2000 mA
ETU76B trip unit
1
170 mA
2000 mA
Metering function PLUS
1
120 mA
120 mA
Breaker Status Sensor BSS
1
40 mA
110 mA
COM15 PROFIBUS communication
module
1
125 mA
180 mA
ZSI module
1
50 mA
125 mA
Digital output module with rotary coding
switch, relay outputs
1-2
180 mA
125 mA
Digital output module, configurable,
relay outputs
1
180 mA
125 mA
Analog output module
1-2
110 mA
800 mA
Digital input module
1-2
30 mA
125 mA
BDA PLUS
1
250 mA
350 mA
Connection of several SENTRON WLs
To connect several SENTRON WL circuit breakers to a power supply, the aggregates of the
continuous currents and start-up currents must be taken into account.
SITOP Power power supply
The appropriate power supplies can be selected from the Siemens SITOP Power range.
Example:
A switch consists of an ETU45B, BSS, COM15, metering function, and output module with
relay contacts.
The maximum continuous current is 585 mA, and the maximum start-up current is 2635 mA.
That is, a SITOP Power 2 is sufficient for power supply. For one or more SENTRON WLs, a
power supply from the SITOP range can be selected. You can find further technical data in
the Catalog KT 10.1 or in the online Mall (https://mall.automation.siemens.com
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