◦ The GCB will take the same state as it had before the critical mode has been
◦
enabled.
4.4.5.4.2
Critical Operation At The Generator
The fire engine pump mentioned before or other critical operation is connected to the
generator, i.e. it does not require a closed GCB to be supplied by the generator during
critical operation.
Parameter
(Close GCB in critical mode) should be configured to "No". This
ensures an open GCB during critical mode. A closed GCB is possible in case of an
emergency operation.
Fig. 179:
Critical operation at the generator
Critical mode during mains supply
If critical mode is enabled during mains supply (MCB is closed), the generator will be
started (if not already running) and operated with open GCB. The "Critical mode"
message is displayed on the display screen. All shutdown alarms become warning
messages.
If critical mode is disabled again, all shutdown alarms become active again. If the genset
was not running before critical mode has been enabled, it will be stopped after the critical
mode postrun time (parameter
) has expired.
Emergency power during critical mode
If there is a mains failure during critical mode, the MCB will be opened after the mains fail
delay time (parameter
) has expired and the GCB will be closed. It is not
necessary to configure parameter
(Break emerg. in critical mode) because the
critical operation is already supplied. The "Emerg/Critical" message is displayed on the
display screen and all shutdown alarms become warning messages.
• Critical mode ends before mains recovery:
•
◦ The emergency power operation will be continued and all shutdown alarms
◦
become active again.
◦ If the mains returns, the unit transfers the load from generator supply to mains
◦
supply after the mains settling delay expires.
• Emergency power operation ends before the end of the critical mode:
•
◦ The critical mode is maintained and the load is transferred from generator
◦
supply to mains supply after the mains settling delay expires.
390
easYgen-3000XT Series
B37574
4 Configuration
4.4.5.4.2 Critical Operation At The Generator
Released
Содержание easYgen-3000XT Series
Страница 109: ...Fig 72 easYgen 3100XT P1 Series 109 easYgen 3000XT Series B37574 3 Installation 3 4 1 Interfaces overview Released...
Страница 122: ...Fig 85 Menu structure menu tree easYgen 3100XT P1 3200XT P1 122 easYgen 3000XT Series B37574 4 Configuration Released...
Страница 332: ...Fig 169 Load sharing diagram 332 easYgen 3000XT Series B37574 4 Configuration 4 4 4 3 6 Load Sharing Released...
