HGM9520N Genset Paralleled Controller User Manual Page 101 of 111
15
DUMMY LOAD CONNECTION
Dummy Load --- DL for short.
The controller can control the 3 ways of DL connect separately. The order of the essentiality is: DL1 >
DL2 > DL3
Auto operation:
When DL auto connect is enabled:
If the genset power has fallen below the DL connection value, after the connection delay, DL1 will
connect the earliest, and then is DL2, DL3;
When DL auto disconnect is enabled:
If the genset power has exceed the DL disconnect value, after the disconnect delay, DL3 will disconnect
the earliest, and then is DL2, DL1.
Fig.16 DL Sequence
Manual Operation
If manual DL connect input is active (earthed failing edge is active), DL1 will connect without delay; If
manual DL connect input is active again, DL2 will connect; If manual DL connect input is active the third
time, DL3 will connect. During this process, the controller will detect if the genset power has fallen the
DL connection value or not. If genset power is below DL connection value, this input is active, otherwise,
it will be ignored.
If manual DL disconnect input is active (earthed failing edge is active), DL3 will disconnect without
delay; If manual DL disconnect input is active again, DL2 will disconnect; If manual DL disconnect input
is active the third time, DL1 will disconnect.
NOTE:
When auto connection and auto disconnection are enabled, manual operation is still active.
