Alstom MiCOM P546 - 4.2.8 System split (P543;P545)

P54x/EN OP/La4 Operation
(OP) 5-154 MiCOM P543, P544, P545 & P546
OP
4.2.8 System split (P543/P545)
For the System Split module to function:
The System Checks setting must be Enabled.
AND
The SS Status setting must be Enabled.
AND
The module must be individually enabled, by activation of DDB signal System Split Enabled,
mapped in PSL.
When enabled, the System Split module sets its output signal when:
Line volts and bus volts are both live (Line Live and Bus Live signals both set).
AND
Measured phase angle is > SS Phase Angle setting.
AND
If SS Volt Blocking is set to Undervoltage, both line volts and bus volts magnitudes are > SS
Undervoltage setting.
The System Split output remains set for as long as the above conditions are true, or for a
minimum period equal to the SS Timer setting, whichever is longer.
The Check Synch and System Synch functionality is illustrated in Figure 99, and the logic
block dia
gram is shown in Figure 100.