easYgen-3500XT-P2-LT 8440-2089

easYgen-3500XT-P2-LT 8440-2089

The GCB will be opened when the “Command GCB open” is

issued. The behavior of the GCB open relay depends on the set

ting of parameter 3403 Ä p. 219.

If this parameter is configured as “N.O.”, the relay energizes to

open the GCB, if it is configured as “N.C.”, the relay de-energizes

to open the GCB.

The GCB will be opened under the following conditions:

n In STOP operating mode after unloading the generator

n In case of a class C alarm or higher

n By pressing the “GCB” or “MCB” softkey (depending on the CB

logic which has been set) in MANUAL operating mode

n By pressing the button “stop engine” in MANUAL operating

mode

n In the event of an automatic stopping in the AUTOMATIC oper

ating mode (the start request has been terminated or a stop

request has been initiated)

n In critical mode (Sprinkler operation), provided that an emer

gency power operation is not active, and “Close GCB in over

ride” (parameter 4100 Ä p. 292) has been configured to No

n If “Start without load” has been enabled through the Logics

Manager and the breaker was closed

n By pressing the “MCB” softkey (depending on the CB logic

which has been set) in MANUAL operating mode

Prior to the MCB closing onto the dead busbar (depending on

the CB logic which has been set)

n In case of an alarm of class D or F

The MCB will be opened when the relay “Command: MCB open” is

energized.

The MCB will be opened under the following conditions if the MCB

is closed:

8440-2089

n If an emergency power operation is initiated (mains failure)

once the generator voltage is within the permissible limits

n Prior to the closure of the GCB (depending on the CB logic

which has been set)

n Upon pressing the “MCB” or “GCB” softkey (dependent upon

the configured CB logic) in MANUAL operating mode

Parallel operation is enabled by configuring param

eter 3411 Ä p. 217 to “PARALLEL”

In the event of an engine start request the following occurs:

n The GCB is synchronized and closed

n The generator assumes load and the adjusted real power or

reactive power setpoints are controlled

Following the stop request the following occurs:

n The generator sheds load until real power has reached the

“Unload limit” (parameter 3125 Ä p. 331)

n The generator power factor is controlled to “1.00” (unity)

n The GCB is opened

n The engine is shut down following the configured cool down

period

Mains interchange (import/export) real power control is enabled by

configuring parameter 3411 Ä p. 217 to “INTERCHANGE”

In the event of a start request, a change is made from mains to

generator supply.

The following occurs:

n The GCB is synchronized and closed

n The generator assumes load until the imported mains inter

change real power has reached 3 % of the “Generator rated

active power” (parameter 1752 Ä p. 422)

n The MCB is opened

When a stop request has been issued, a change is made from

generator to mains supply.

The following occurs:

n The MCB is synchronized and closed

n The generator sheds load until real power has reached the

“Unload limit” (parameter 3125 Ä p. 331)

n The generator power factor is controlled to “1.00” (unity)

n The GCB is opened

In the event of an engine start request, a change is made from

mains to generator supply.

The following occurs:

n The GCB is synchronized and closed

n The MCB is opened and the generator assumes all loads

After the engine stop request has been issued, a change is made

from generator to mains supply.

The following occurs:

n The MCB is synchronized and closed

n The GCB is opened and the mains assume all loads

Open transition (break-before-make/change over logic) is enabled

via configuration of parameter 3411 Ä p. 217 to “OPEN TRANSI

TION”.

In the event of an engine start request, a change is made from

mains to generator supply.

The following occurs:

n The MCB is opened

n The GCB is closed after the time configured in “Transfer time

GCB<->MCB” (parameter 3400 Ä p. 218) has expired.

The following occurs:

n The GCB is opened

n The MCB is closed after the time configured in “Transfer time

GCB<->MCB” (parameter 3400 Ä p. 218) has expired