Monitoring of paralleling conditions

This function compares the actual values with their set

maximum values and releases paralleling (CHK RELEASE) if

all conditions are fulfilled simultaneously.

Command generation

The command generation calculates the necessary lead angle

αv, by which the paralleling command must be advanced

due to closing time delay. The action ensures that the main

contacts close at precisely the right time. If α reaches αv at

the same time as paralleling release (CHK RELEASE), the

command is issued. Under synchronous conditions, ie,

permanent paralleling release during the adjustable monitoring

time, tsup, the CMD is also issued without taking the lead

angle into consideration.

Synchrocheck mode (paralleling monitoring)

In synchrocheck mode, only the measuring and monitoring

function blocks are active. The output relay is closed during

paralleling release.