Technical Specifications; Connection - Siemens SENTRON 3WA1 Manual

Accessories
4.11 Accessories for the ETU300 and ETU600 electronic trip units
4.11.5.2

Technical specifications

The internal current sensors without energy cores can only be installed at the factory in
the case of the 3WA12 and 3WA13 circuit breakers. A retrofit is not technically possible.
Note
If the option Z = K60 is installed, an optional metering function PMF-I to PMF-III is
possible. This metering function has the accuracy specified by the manufacturer. A
certificate according to IEC 61557-12 cannot be created in this case.
4.11.5.3

Connection

The ETU600 electronic trip unit must be powered by an external auxiliary voltage of
24 V DC, which must be connected to secondary disconnect terminals X8-3 and X8-4.
The circuit breaker must be equipped with an undervoltage release in addition. This is
available for 24 V DC control supply voltages up to 208 - 240 V AC / 220 - 250 V DC. The
380 - 415 V AC version is not possible for this application.
The following undervoltage releases can be selected when configuring the circuit
breaker.
Auxiliary releases
Undervoltage release (UVR),
instantaneous (≤ 0.08 s) and
short-time-delayed (≤ 0.2 s)
The article number comprises up to 16 digits, e.g. 3WA1 xxxx-xxxx-xxLx.
1)
The 15th digit represents the selection of accessories such as the undervoltage release.
The control supply voltage of the undervoltage release must be connected to secondary
disconnect terminals X5.11 and X5.12.
The connected auxiliary voltage of 24 V DC is monitored by an internal relay. If the
auxiliary voltage fails, the circuit breaker is opened by the relay contacts that are
connected in the control circuit of the undervoltage release.
356
Type
24 V DC
48 V DC
110 ... 127 V AC/110 ... 125 V DC
208 ... 240 V AC/220 ... 250 V DC
Equipment Manual, 02/2023, 92310000002-06
15th digit of the
article number
1)
L
N
P
Q
3WA1 air circuit breaker