Chapter 3 - Device Overview
50 3BHS335648 E82 UNITROL 1020 User Manual
Slip
[Hz]
Minimum
Maximum
0.00
(configurable)
Pulse
width
0 ms
100 ms
100 ms
50%
200 ms
200 ms
400 ms
1000 ms
Max
-0.50
Max
-1.0
Max
-5.00
2000 ms
400 ms
1000 ms
2000 ms
Min
+0.50
Min
+1.00
Min
+5.00
-0.40
(configurable)
Dead Bus Synchronization
UNITROL 1020 supports synchronization to a dead bus (Unet < 10%). To enable dead
bus synchronization, the digital input “Sync Dead Bus enable” must be configured and
applied.
The digital input should be wired over the MCB of the Unet PT protection in order to
ensure that Unet is < 10%.
In case of broken or open Unet PT measurement, the machine might be
seriously damaged when applying dead bus synchronization
Preconditions for Synchronization
CB close command and Synchrocheck output is applied
after the network voltage is below 10% for 2 sec.
Voltage matching and control signal to the governor are
disabled
Synchronization and Synchrocheck is blocked
Voltage matching and control signal to the governor are
disabled
CB close command and Synchrocheck output is applied.
Control signals to the governor are applied
Activation:
The Synchronization can be activated via digital input or Remote Access. For more
information refer to Chapter 3.3.5 Digital Inputs, Chapter 3.4.6 Modbus for Remote
Access and 6.4.5 Menu Structure of CMT1000.
The Synchronization and Voltage Matching are features that are activated using the
same activation signal, called Synchronize. When the Synchronization SW is not
available in the AVR (i.e. LED off in SW-options window of CMT1000), only Voltage
Matching will be activated when Synchronize digital input is set to high. On the other
hand, when Synchronization SW is available (i.e. LED on in the SW-options window of
CMT1000), Synchronize input will fully activate the Synchronization feature, which also
includes the capability of voltage matching and the Fbias output. For more information
about Voltage Matching see Chapter 3.4.2.6 Voltage Matching (VM).
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