Manual 37259C
SPM-D11 - Synchronizing Unit
Page 58/79
© Woodward
Phase matching
ON
Phase matching control
ON/OFF
ON
................The synchronization is performed with Phase matching control and
circuit breaker closure operations are dependent upon the phase an-
gle. The relevant phase matching screens are displayed.
OFF
..............The synchronization is performed with frequency and voltage match-
ing for the generator and busbar with the circuit breaker being closed
at the synchronous point. The relevant screens for adjusting the syn-
chronizing slip are displayed.
Slip synchroniz.
Max phase < 00°
Zero phase control = OFF
Max. permissible. differential angle
0 to 60°
This configuration screen appears only if the phase matching control is configured
as OFF. The prerequisite for the close command to be issued is that the phase an-
gle differential must be less than the value configured here.
Synchronization with slip
- When operating in the "slip synchronization" mode
this phase angle may be set as the maximum value that a close breaker command
may be issued. This is determined by the formula:
∆φ
= T
Close
* 360° *
∆
f
Example: If the frequency difference is 0.5Hz and the delay of the circuit breaker
delay is 80ms the delta phi is determined as follows:
T
Close
= 80ms,
∆
f= 0.5Hz =>
∆φ
= 0.08s*360*0.5 = 14.4°
As an example if the desired synchronization window is to be limited to a maxi-
mum of 10°, then the limit value of 10° would be entered here. If this parameter is
not required, then the angle must be configured as 60°
Synch-check
- In the "Synch-check" operation mode, the phase angle differential
must be less than the value configured here in order to energize the relay "Close
CB".
Slip synchroniz.
TClose GCB=000ms
Zero phase control = OFF
Inherent delay of CB
40 to 300 ms
This configuration screen only appears, if the phase matching control is configured
OFF. This parameter is the close time of the circuit breaker. The time configured
here is the amount of time from when a breaker receives a close command until the
breaker contacts actually close. This permits the control to issue a close command
just prior to the synchronization point so that the breaker closes at that point.
Phase matching
Max phase < 00°
Zero phase control = ON
Max. permissible differential angle for phase matching control
0 to 60°
This configuration screen only appears, if the phase matching control is configured
ON! This is the maximum phase angle difference between the generator voltage
and the busbar/mains voltage that a CB close command will be issued.
Phase matching
Dwell time 00.0s
Zero phase control = ON
Phase matching control breaker transition dwell time
0.2 to 10.0 s
This configuration screen only appears, if the phase matching control is configured
ON!
Once the synchronization window parameters have been met, a dwell timer is
started. The close breaker pulse will not be issued until this dwell time has expired.
If any of the required parameters leave the required ranges, the dwell timer will be
reset.
