1MAC308145-MB E
Section 3
RER620 application
RER620
67
Application Manual
Figure 49 shows logic related to group change initiation through DLCM function. The
SWOTF output of DLCM function is one of the input to "INHIBIT_RECL" input channel
in 79 (SDARREC) function which inhibits the reclosing function.
3.5.7
Resetting DLCM Function
In the sectionalizer and midpoint mode, if the setting "Reset on power up" setting is set as
"TRUE", then after any re-initialization activity in the relay like power off-and-on,
software reset, committing to a setting change etc., the loop control will be in reset or
active state and RESET_OUT output will FALSE.
If the setting "Reset on power up" is set as "FALSE", then after any re-initialization
activity in the relay, the loop control will be in non-reset or in-active state and
RESET_OUT output will TRUE. In that case, after restoring the line the DLCM function
is reset through push button 15 [Key 15: Loop Scheme Reset] circled in the Figure 47.
In the tie-point mode, after the power on and power off of the relay, the loop control will
always go into non-reset mode due to safety reasons. The loop control function can be
moved to active or reset state only through push button 15 [Key 15: Loop Scheme Reset]
after restoring the line.
The configuration logic for LCM Reset is shown in Figure 48. All the restoration steps
should be performed before in full compliance with all applicable safety procedures before
resetting the DLCM functionality in RER620 relay.
3.6
Hot Line Tag Functionality
The RER620 has a user settable ‘Hot Line Tag’ (HLT) function as a part of default
configuration. When this function is enabled, automatic reclosing and manual closing of
breaker is inhibited.
The HLT function can be enabled and disabled locally (i.e. when R/L is set to L), by the
dedicated push-button on LHMI of the relay. The push-button toggles the status of the
function. When the HLT function is enabled locally, it can only be disabled locally i.e., it
cannot be disabled remotely. The HLT function can also be enabled and disabled remotely
by SCADA, i.e. when R/L button is set to R. When the HLT function is enabled remotely,
it can only be disabled remotely i.e., it cannot be disabled locally. If the HLT function is
already enabled locally, it cannot be enabled again remotely and vice versa.
When the HLT function is enabled, the reclosing sequence is inhibited i.e., in the event of
a Trip, automatic Close is no longer possible and Lockout takes place. When in single
phase mode, if an overcurrent trip occurs only the faulted phase is opened and lockout
occurs. Also, when the HLT function is enabled, a manual Close attempt, either from the
LHMI or by SCADA is blocked.
A LED on the LHMI of the relay, identified by label ‘Hot Line Tag ON’ indicates the
status of the HLT function – Enable = Illuminated / Disable = not Illuminated. The LED
Summary of Contents for Relion 620 Series
Page 1: ...Relion 620 series Advanced Recloser Protection and Control RER620 Application Manual...
Page 2: ......
Page 16: ...Section 1 1MAC308145 MB E Introduction 10 RER620 Application Manual...
Page 26: ...Section 2 1MAC308145 MB E RER620 overview 20 RER620 Application Manual...
Page 86: ...Section 5 1MAC308145 MB E Relay physical connections 80 RER620 Application Manual...
Page 89: ......