HAT600P Series ATS Controller User Manual Page 46 of 58
Fig. 10 ATS Power Line Voltage Supply
NOTE 1
: N/C terminal voltage must be S1 voltage.
NOTE 2
: Only when controller detects ATS power normal, can it issue switch close/open actions. If
output port is not set for ATS power, system default is to make L1-N supply for ATS power.
16
NEL CONTROL
16.1
ILLUSTRATION
Non-essential Load is NEL for short, which refers to the load that can be unloaded first when genset
power is not enough.
Controller can control 3 ways of NEL trip and the essentiality is: NEL 3>NEL 2>NEL 1.
16.2
AUTOMATIC OPERATION
When NEL auto trip is enabled: If genset power has exceeded NEL trip value, after trip delay NEL1 will
trip for the earliest, and next is NEL2, NEL3;
When NEL auto reconnection is enabled: If genset power has fallen below the auto reconnection set
value, after the auto reconnection delay NEL3 will be reconnected for the earliest, and next is NEL2,
NEL1;
Fig. 11 NEL Control Time Sequence
16.3
MANUAL TRIP
If NEL manual trip input is active (failing edge is active), NEL1 will trip without delay; If NEL manual trip
input is active again, NEL2 will trip; If NEL manual trip input is active for the third time, NEL3 will trip.
During this process, the controller does not detect if the genset power has exceeded the NEL trip value
or not.
If NEL manual reconnection input is active (failing edge is active), NEL3 will be reconnected without
delay; If NEL manual reconnection input is active again, NEL2 will reconnect; If NEL manual
reconnection input is active for the third time, NEL1 will reconnect. During this process, the controller
detects the genset power: if the genset power has fallen below the NEL reconnection value, then the
input is active; if it doesn’t, the input is deactivated.
NOTE:
When auto trip and auto reconnection are enabled, manual trip is still active.
