Deif AGC-4 Mk II Designers Handbook

5.4.2 Flowchart 2, TB handling (option G5)
Start
Any GB closed
MB OFF
Close TB
End
No
No
Yes
TB Open
No
Yes
Yes
P
AVAIL
> P
CAP
Yes
No
”GB + TB”
Sync TB
Yes
No
5.4.3 Genset start actions
The start sequence of the AGC is changed in order to achieve the function "close before excitation". The following parameters must
be adjusted:
Menu
Description Comment
2251
RPM set point for
breaker closing
The generator breaker will close at the adjusted level. The range is from 0-400 RPM. If it is adjusted
to 0, the breaker will be closed when the start command is given.
In the example below the setting is adjusted to 400.
2252 RPM timer
The genset must reach the set point (menu 2263) within the adjusted delay.
When the delay expires and the RPM is above the set point, the excitation will be started. If the
RPM is below the set point, the GB will be tripped.
2253 Output A
Select the relay output that must be used to start the excitation.
Configure the relay to be a limit relay in the I/O setup.
For best possible CBE behaviour, it is recommended to use relay 5, 8 or 11.
2255 Enable Enable the function "close before excitation".
DESIGNER'S HANDBOOK 4189341275A EN Page 92 of 196

Deif AGC-4 Mk II Specifications

General

Brand	Deif
Model	AGC-4 Mk II
Category	Controller
Language	English