Siemens SIRIUS 3RH Series, System Manual

Page: 703 / 786

SIRIUS 3RR2 current monitoring relays
8.7 Connection
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
703
8.7.2 3RR22 Standard digital setting current monitoring relay
Connection of terminals
Depending on their design, the current monitoring relays are supplied with a 24 V AC/DC or
24 to 240 V AC/DC supply via terminals B1/B2.
The current monitoring relays monitor an AC load current (apparent current I
s
or active
current I
p
) which flows through device terminals 1L1/2T1, 3L2/4T2, and 5L3/6T3. The current
monitoring relay has two separate outputs which respond to separate threshold values.
In accordance with the configuration the system is monitored for overshoot (I▲ CO contact,
I!▲ semiconductor output) or undershoot (I▼ CO contact, I!▼ semiconductor output), or values
are checked within a window range (I▲ , I!▲ and I▼ , I!▼ ≠ OFF).
Terminal Designation
B1 Supply voltage ∼/+
B2 Supply voltage ∼/-
Q Semiconductor output, e.g. for pre-warning threshold
32 Output relay CO contact NC contact, e.g. for alarm threshold
31 Output relay CO contact root, e.g. for alarm threshold
34 Output relay CO contact NO contact, e.g. for alarm threshold
2T1
4T2
6T3 Main circuit terminals
14/22 Feed-through contactor auxiliary switch (S00)
A2 Feed-through contactor coil terminal (S00)
Reference
More information ... Can be found in the chapter titled ...
About connecting the SIRIUS modular system System overview, under "Connection (Page 74)"
About connection terminals 3RR224.-.F.30 Standard digital setting current
monitoring relay (Page 688)
About conductor cross-sections and tightening
torques
Conductor cross-sections main circuit (Page 747)