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SPM-D2-10 SPM-D2-10/YB Synchronizing Unit

During the synchronization the unit may output a so-called kick pulse. The kick pulse is an individual pulse “raise speed ” The output of a kick pulse avoids that a status is maintained where the frequencies of the systems U1 and U2 are almost equal for a long time, whereas the phase angle between the systems does not equal zero and re- mains almost unchanged. In this state there is no synchronism and thus, no add-on of the power circuit breaker is possible.

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Essential details：SPM-D2-10 SPM-D2-10/YB Synchronizing Unit

With the relays of the three-position controller and speed switching appropriately, voltage and frequency of the system U2 are adjusted to the configurable set point values. (Also see chapter “Table of Functions” starting on page 16).

Synchronizing

The system U2 is adjusted to system U1 as far as voltage and frequency are concerned, the relays of the three- position controller for voltage and speed switching correspondingly. Taking the switcher time element into ac- count, the add-on order for the power circuit breaker is output in the synchronous point. The synchronization or add-on is effected under the following conditions (also see chapter Table of Functions” on page 16):
 The unit is in automatic mode (LED “automatic” is illuminated)
 The synchronization function is enabled by configuration
 Voltage and frequency of system U1 and U2 are within a certain range (see chapter “Table of Functions” start- ing on page 16),
 The discrete input “Release CB” is energized
 The discrete input “Release: CB is open” is energized
 The synchronization time monitoring is not enabled or has not expired
During the synchronization the unit may output a so-called kick pulse. The kick pulse is an individual pulse “raise speed ” The output of a kick pulse avoids that a status is maintained where the frequencies of the systems U1 and U2 are almost equal for a long time, whereas the phase angle between the systems does not equal zero and re- mains almost unchanged. In this state there is no synchronism and thus, no add-on of the power circuit breaker is possible. Since in this case, the frequency controller does not output any actuating pulses, reaching the synchro- nous point would take too long. With the output of a kick pulse the phase angle is changed. Thus, the synchronous point is reached faster.

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SPM-D2-10 SPM-D2-10/YB Synchronizing Unit

Output of an add-on order for the power circuit breaker without synchronization, if the following conditions are fulfilled:
 The dead bus start function is in principle activated by configuration
 One of the three possible dead bus start functions is selected by configuration
 The discrete input “Dead bus start release” is energized
 The discrete input “Release CB” is energized
 The discrete input “Reply: CB is open” is energized
 The conditions for one of the preset dead bus start functions are fulfilled:
a) U1 has the value Un (taking the configured rated voltage difference into account dV |V-V zero (taking the configured zero voltage difference into account dV |V-0|).
b) U1 is zero (taking the configured zero voltage difference into account dV |V-0|) and U2 has the value V (taking the configured rated voltage difference into account dV |V-V
c) U1 is zero and U2 is zero (taking each configured zero voltage difference into account dV |V-0|). Moreover, in case a) and b) the frequency of U1 and U2 must be within the configured limits.

Synch-Check

In this condition, the unit can be used as a synchronization control. No control is carried out. The relay “CB close” remains picked up, as long as the following conditions are met:
 The voltage differential is within the configured limit (screen “synchronization dV
 The frequency differential is within the configured limit (screens “synchronization df
 The phase angle is within the configured limit (screen “slip synchron. phi
 The discrete input “Reply: CB is open” is energized
 The discrete input “Enable CB” is energized
 The systems U1 and U2 are within the permitted limits (see Table 5-2: Operating modes – operating conditions, condition A, page 16).
 The discrete input “Synch-check” is energized.
The synchronization time monitoring must be deactivated.
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