Kohler EKOZD Series Service page 249

13.4.11 Min Gens Online
This parameter indicates how many generators the
system will run with no load on the system. It can be
used to keep an additional generator online, but is not
intended to convert a system to N+1 redundancy. N+1
Redundancy can be accomplished by setting the start
and stop percentages considerably lower.
13.4.12 Min Load Shed Priority
Generator Management will be disabled any time the
load control sheds a priority below this level. Setting the
Min Load Shed Priority to 0 will disable the link between
Load Control and Generator Management. Minimum
Load Shed Priority should only be set to 0 if no Load
Control priorities are connected to interrupt a load.
If loads are shed below this threshold, Generator
Management will be disabled (resulting in all available
generators starting).
Any connected Load Control priorities should disable
Generator Management when they are shed, to avoid
Generator Management stopping generators while
loads are still adding, to allow Generator Management
to start additional generators to support shed loads, and
to allow extended underfrequency events to start
additional generators.
TP-6953 7/19
13.5 Generator Management
Detailed Functional
Description
13.5.1 Stability Timer
The Stability Timer must timeout before Generator
Management becomes functional. The Stability Delay is
adjustable as a parameter, but is a fixed amount of time
(does not depend on any variables). If the timer restarts,
the delay will be measured from the time of restart.
Requirements to run stability timer (all must be
true):
Start Signal is being received on at least one
D
generator in the paralleling system (the generator
that is receiving the start signal does not need to be in
auto, as long as some generators in the system are
available, they will start).
At least 2 generators are connected to the paralleling
D
bus.
Load Priorities have added past the Minimum Load
D
Shed Priority.
Generator Order is Valid (unique and sequential).
D
Configuration of Generator Management matches on
D
all nodes.
Generator Management is Enabled.
D
Conditions to cause a restart of the stability timer:
Start Signal is removed from all generators in the
D
paralleling system.
No generators are connected to the paralleling bus.
D
The Load Priority specified by Minimum Load Shed
D
Priority is shed.
Generator Order remains invalid for 10 seconds.
D
Configuration of Generator Management is changed
D
on a node or a node is added to the system with a
different configuration.
Generator Management is Disabled.
D
A generator disconnects from the paralleling bus
D
when it has not been told to do so by Generator
Management (a user forces the generator to stop by
pressing off, the circuit breaker trips due to a fault, the
generator has a shutdown, etc.).
Section 13 Generator Management Information 249