ABB RELION 620 Series Technical Manual page 870

Section 5
Protection related functions
5.8.5
864
CB_POSOPEN
CB_POSCLOSE
SI_PWR_ON
CB_OPEN_CMD
GUID-2BEA9587-68B3-4B76-BAA5-D53DAA8A0D97 V2 EN
Figure 447: Functional module diagram
Signal power supply check
This module is used for signal power supply supervision. The activation of the
SI_PWR_ON input enables the Operate logic module after the value of the CB power
on delay time setting has elapsed.
Protection activation check
The main purpose of the module is to disable the Operate logic module when the CB
open command has been deployed by another function, for example, a protection or
control function. The activation of the CB_OPEN_CMD input disables the Operate
logic module immediately. The duration of the disabling time can be set with the CB
open hold delay setting.
Operate logic
The OPERATE output of this module can be used for closing the circuit breaker if it is
opened for an unknown reason. The OPERATE output is activated immediately after
the CB_POSOPEN input becomes active and CB_POSCLOSE inactive. The pulse
length for the OPERATE output signal can be set with the Operate pulse time setting.
The module is disabled if the signal power supply is faulty
(SI_PWR_ON = FALSE) or the open command is sent to the breaker
(CB_OPEN_CMD = TRUE).
Application
The uncorresponding circuit breaker position means that the actual position of the
circuit breaker's control switch is unmatched with the real position of the circuit
breaker. In a normal situation, the function is used in cooperation with the
autoreclosing function DARREC. The operate signal can start the autoreclosing when
detecting that the circuit breaker has opened in an unknown situation. If the function
Signal power
Operate logic
supply check
Protection
activation
check
1MRS757644 F
OPERATE
620 series
Technical Manual