Siemens SIRIUS 3RF Series

SIRIUS 3RR2 current monitoring relays
8.8 Operation
SIRIUS Innovations
704 System Manual, 01/2011, A8E56203870002-03
8.8 Operation
8.8.1 3RR21 Basic analog setting current monitoring relay
8.8.1.1 Parameters
Operator controls
The analog setting current monitoring relay has 4 rotary buttons and 1 slide switch for setting
parameters. To make changes to the settings, you need a screwdriver.
2,
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Figure 8-3 Operator controls on the analog setting current monitoring relay
Parameters
The following parameters can be set:
● ON-delay time (onDel)
● Tripping delay time (Del)
● Threshold value for current overshoot (I▲)
● Threshold value for current undershoot (I▼)
● Automatic/manual RESET (Memory)
Required tools
To set the parameters, you can use the same screwdriver as for mounting the current
monitoring relay (Pozidriv size 2 for size S00 or Pozidriv size 3 for size S0).