CYG PRS-7367 - Application Scope; Settings; Mechanical Protection MP; Overview

Protection Functions
PRS-7367 159
The function uses a double point position input to verify the validity of the disconnector, if any
CB position is invalid, then the binary input error alarm will set to true after 30s time delay.
If CB1 is closed or CB1 and CB2 are both closed, then the voltage from bus 1 or line 1 is used
by the protection function; If only CB2 is closed, then the voltage from bus or line 2 is used; If both
CB are in open position, then the voltage output is 0.
Beyond the above three conditions, the voltage selection is considered invalid, and should use
the latest valid voltage selection result as input.
3.31.3 Application Scope
The function is used to select one voltage between two bus voltages or two line voltages. The
selection result depends on the type of system configuration.
3.31.4 Settings
Table 3.31-3 Voltage Selection Settings
No.
Name
Values(Range)
Unit
Step
Default
Description
1
Line_PT
0-1
-
-
0
Enable/Disable: Enable means
synchronous voltage is configured;
disable means synchronous voltage
is not configured
3.32 Mechanical Protection MP
3.32.1 Overview
This relay provides a one-stage mechanical protection with definite time delay characteristics.
3.32.1.1 Function Block
The function block of the protection is as below.
MECH_PROT
Mech_BI
Op
Alm
Blk
Str
Figure 3.32-1 Function block
3.32.1.2 Signals
Table 3.32-1 Input Signals
Signal
Description