Siemens 3AD8 User Manual

KMS-0021
37
2022-02-10
4.2.4 Protection Operation
Protection operation of a CMR can be changed in-service (i.e., without reconfiguring the CMR) by
either (a) changing protection groups or (b) changing protection modifiers to block or allow certain
protection functionality.
The primary function of the red handle on the CMR is to change protection groups
 When the red handle is up, the CMR will apply the users selected protection group.
 When the red handle is down, the CMR will apply the configured lever down protection group.
Protection group and protection modifiers can also be changed
 Using the CMRConnect utility on a PC equipped with a USB antenna module.
 SCADA operator via the RCU
 Operator control panel if fitted to the RCU
Refer to [1] for further detail of how protection groups and modifiers can be changed and monitored.
The CMR will reject any group change request if the target group has not been configured.
4.2.5 Excessive Cleared Faults
The RCU does not support this functionality for CMR switchgear.

Siemens 3AD8 Specifications

General

Brand	Siemens
Model	3AD8
Category	Control Unit
Language	English