Deif AGC-4 Mk II Designers Handbook

For Genset controllers in a power management application, the table below is applicable:
Genset voltage terminals Busbar voltage terminals
79-84 85-89
Parameter 2150 is consisting of two alarms, and the phase rotation direction setting. The phase rotation setting is the same for the
both terminal sets. The two alarms refer to the voltage terminals. To know which alarm refers to voltage measurement, the table
below has been made to make an overview:
Menu/Parameter no. Mains controller BTB controller Genset controller
2153 Mains voltage Bus A voltage Genset voltage
2156 Busbar voltage Bus B voltage Busbar voltage
The diagram made earlier, can be helpful in locating where the different location of each voltage measurement is made.
The table above shows on which terminal set the phase sequence error occurs to activate the fail class set in the parameter 2153
and 2156. This can also be shown in a diagram like this:
G
Mains controller
BTB controller
Genset controller
2153
2156
2156
2153
21562153 21562153
GB 1
G
2153
GB 2
2156
BTB 33 BTB 34
TB 17
MB 17
2153
2156
TB 18
MB 18
When setting up the phase sequence alarms, it can be helpful to activate MB fail start (8181) in some of the mains controllers. This
gives the possibility if e.g. the phase sequence error for mains voltage (2153) appears, and the fail class is Trip MB, then the
gensets will start. If then autoswitch is enabled also (8184) the other grid connection can supply as backup load, before the gensets
will start. If the other mains do not have a phase sequence error, the other mains will keep on supplying the load, and the gensets
will not start.
Example
On genset 1, parameter 2153 is set to trip+stop. Genset 1 has recently been out for service, and two phases has accidentally been
switched. A mains fail now occurs on mains 17, and genset 1 will start up. The controller for genset 1 sees a phase sequence error
here, and activates its fail class. GB1 will never be closed. BTB33 will now close, and genset 2 will start up and supply the load. If
there also is a phase sequence error on the B side of BTB33, and 2156 in BTB 33 is set to trip BTB, the system will close BTB34
instead, since this is a system with wrapped busbar.
DESIGNER'S HANDBOOK 4189341275A EN Page 68 of 196

Deif AGC-4 Mk II Specifications

General

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