Load Shedding - ComAp IG-NT GC Reference Manual

Load shedding

CurLdShedAct
DISABLED Current Load shedding is switched off at all
ISLAND ONLY Current Load shedding is active only in island operation; before GCB closing all the
LdShed outputs get closed; in parallel operation with mains is always switched off
ISL+TRIP PARAL The same functionality as ISLAND ONLY, but in additional it closes all the LdShed outputs
during the power failure ( =change from parallel to island operation); according to the Load
in island operation it can be potentially reconnected beck
ALL THE TIME Current Load Shedding works only according to gen-set Power, it works without reference
to operation type (island, parallel or any transitions)
Force value possibility: Yes
CurLdShedLvl
When generator current in any phase exceeds this level for more than Shed delay time, controller proceeds
to the next Load shedding stage - the next binary output Load shed x is closed.
Step: 1 % of Nomin Current
Range: Ld recon level - 200 % of Nomin current
Force value: Yes
CurLdRecLvl
When gen-set current in all phases drops under this level for more than Recon delay time, controller
proceeds to the lower Load shedding stage. The binary output for higher stage is opened (Load shed x).
Automatic load reconnection works only when AutoLd recon = ENABLED.
Step: 1 % of Nomin current
Range: 0 - Ld shed level
Force value: Yes
FreqLdShedAct
DISABLED Frequency Load shedding is switched off at all
ISLAND ONLY Frequency Load shedding is active only in island operation; before GCB closing all the
LdShed outputs get closed; in parallel operation with mains is always switched off
ISL+TRIP PARAL The same functionality as ISLAND ONLY, but in additional it closes all the LdShed outputs
during the power failure ( =change from parallel to island operation); according to the Load
in island operation it can be potentially reconnected beck
ALL THE TIME Frequency Load Shedding works only according to gen-set Power, it works without
reference to operation type (island, parallel or any transitions)
Force value possibility: Yes
FreqLdShedLvl
When generator frequency drops below this level for more than Shed delay time, controller proceeds to the
next Load shedding stage - the next binary output Load shed x is closed.
Step: 1 % of Nomin freq
Range: 0 % of Nomin freq - Ld recon level
Force value: Yes
FreqLdRecLvl
When generator frequency exceeds this level for more than Recon delay time, controller proceeds to the
lower Load shedding stage. The binary output for higher stage is opened (Load shed x). Automatic load
reconnection works only when AutoLd recon = ENABLED.
Step: 1 % of Nomin freq
Range: Ld shed level - 200 % of Nomin freq
Force value: Yes
Inteli NT GeCon-MARINE SPI, SW Version 3.2, ©ComAp – July 2015
IGS-NT-GeCon-MARINE-SPI-3.2.PDF
[DISABLED / ISLAND ONLY /
ISL+TRIP PARAL / ALL THE TIME]
[ % ] (FV)
[ % ] (FV)
[DISABLED / ISLAND ONLY /
ISL+TRIP PARAL / ALL THE TIME]
[ % ] (FV)
[ % ] (FV)
(FV)
(FV)
101