Fault at 'closing the MCB'
Alarm classes A & B
• Parameter
"Emergency run" = Off;
•
If the MCB cannot be closed, the busbar remains without voltage, until the MCB
breaker fault is acknowledged.
The control continues attempting to close the MCB.
• Parameter
"Emergency run" = On, parameter
"Emergency start
•
with MCB failure" = Off;
If the MCB cannot be closed, the busbar remains without voltage, until the MCB
breaker fault is acknowledged.
The control continues attempting to close the MCB.
• Parameter
"Emergency run" = On, parameter
"Emergency start
•
with MCB failure" = On;
If the MCB cannot be closed, an emergency power operation is initiated (the engine
is started and the GCB is closed; the busbar is supplied by the generator).
If the alarm is acknowledged and if the MCB can be closed, the load is switched to
mains supply and the emergency power operation terminates.
Fault at 'opening the MCB'
This alarm class has the following influence to the function of the unit:
• This fault is processed according to the action described within the alarm classes. As
•
long as the reply is present that the MCB is still closed, the GCB cannot be closed.
ID
Parameter
CL
Setting range
[Default]
Description
2620
MCB monitoring
2
[On]
Monitoring of the MCB is carried
out according to the following
parameters.
Off
Monitoring is disabled.
2621
MCB alarm class
2
Class A, Class B, Class C, Class D,
Class E, Class F , Control
[Class B]
Each limit may be assigned an
independent alarm class that
specifies what action should be
taken when the limit is surpassed.
Notes
For additional information refer to
3419
MCB maximum
closing attempts
2
1 to 10
[5]
The maximum number of breaker
closing attempts is configured in
this parameter (relay output
"Command: close MCB").
When the breaker reaches the
configured number of attempts,
an "MCB fail to close" alarm is
issued.
544
easYgen-3000XT Series
B37574
4 Configuration
4.5.4.4 Configure MCB
Released