HGM8156 GENSET PARALLEL CONTROLLER USER MANUAL
HGM8156 Genset Parallel (With Mains) Controller 2019-09-10 Version 1.1 Page 15 of 44
5
MULTI-CHANNEL MAINS OPERATION
In multi-channel mains system, multiple gensets are controlled by HGM8156 and they supply multiple
load. If something abnormal occurs for one mains channel, controller will control genset to start and take
load. If something abnormal occurs for multiple channels, controller will control genset to take load one
by one. When there is only one mains channel normal, controller will control switch and make mains take
the load. When there are multiple mains channels normal, controller will control mains to take the load
one by one.
HGM8156 priority includes status priority and module priority. When status priorities are different, priority
is decided by status. When status priorities are the same, the priority is decided by module priority.
Module priority can be set by users, but status priority cannot.
Table 7 Status Priority
Status Priority
Conditions
High
Low
Auto mode, mains failure, bus unloading
Auto mode, mains recover
Auto mode, mains failure, bus loading
Auto mode, mains normal, request to control gensets
Manual mode, gensets ready to run, or are running
Auto mode, mains normal
Manual mode, gensets not start
Stop mode