ABB SYN 5201 Operating Instructions Manual page 14

Operating Instructions
Frequency matcher with variable intervals
The function INVERSE f changes the way the frequency matcher functions. The pulses
are now always the same length, but the intervals are inversely proportional to the slip.
Pulse length: adjustable by means of the parameter tp fmin: tp = tp fmin
Pause interval: is calculated according to the following formula (can not be set as a
parameter):
2.2.3 Monitoring of paralleling conditions
The monitoring of the paralleling conditions can be divided into these parallel-functioning
blocks:

voltage-carrying lines

no-voltage lines
Paralleling of two voltage-carrying lines
The monitoring of the paralleling conditions enables a paralleling command (CHK
RELEASE) if the following conditions are fulfilled simultaneously:

the phase-angle difference is within the tolerance band

the slip is within the tolerance band

the voltage difference is within the tolerance band

the voltage does not fall below minimum voltage

the maximum voltage is not exceeded

the device is in operating status (OPERATING)
 nominal frequency deviation  5 Hz
Paralleling of no-voltage lines (dead bus)
A special case for the monitoring is the paralleling of no-voltage lines. A paralleling
command release is only issued if the external release signal is active and the
measuring logic enables the release at the same time. The release by the measuring
logic can be enabled if both voltages are within one of the permitted ranges. The dead
bus range can be defined as permissible for one, the other or both measuring voltages
by means of the parameters U1not, U2not and 1*2not.
+
U1
U2
abb
ABB Switzerland Ltd
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
ts
f
Dead bus blocking logic and parameters
U1not
U0max 1*2not
U2not
Releasing signal Releasing signal
Document No Art Part
 
1 1
 
30 s

1 f 2 f 1 * s
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&
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3BHS109762 E01
SYN 5201/SYN 5202
OR
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Language Revision
en D
S00007
page
14