36 TP-7044 6/23
The generator may remain running and connected to the paralleling bus for a few seconds after the Stop Accumulator reaches
0%. During this time, the generator is unloading so that it can trip the circuit breaker/contactor connecting it to the bus with
minimal wear on the contacts in the breaker/contactor and minimal disturbance to the voltage and frequency of the system.
Run Time Threshold. The maximum difference in runtime hours that generator management will accept before it re-sorts the
Start/Stop Order of the generators to equalize hours (see Gen Management Order earlier in this section). All the generators in
the system must have the same setting for the Run Time Threshold for the generator management to operate. If this parameter
is changed on any controller, it will be updated on all the generators which are connected to the PGEN network.
Total Run Time. The actual runtime hours of this generator (to the nearest tenth of an hour). This parameter is also available in
the Generator Information screen, but is rounded to the nearest hour.
Fuel Level Threshold. The maximum difference in fuel level that generator management will accept before it re-sorts the
Start/Stop Order of the generators to equalize fuel level. (See Gen Management Order earlier in this section). All the generators
in the system must have the same setting for the Fuel Level Threshold for the generator management to operate. If this
parameter is changed, it will be updated on all the generators which are connected to the PGEN network.
Fuel Level. The level of the fuel in the tank supplying this generator. This is available in the engine metering section in
SiteTech™, but not elsewhere on the User Interface. If no fuel level sensor is connected, this parameter will display N/A. Do not
use Fuel Level as the Generator Management Mode if there is no fuel level sensor connected—the operation of the system is
not defined in this case.
Stable Delay. The time between the system entering a valid generator management state and the time that generator
management becomes active.
A valid generator management state requires:
• A Start Signal is present (Local start, remote start, or communications start)
• A least one generator is closed to the paralleling bus
• Generator Management is enabled
• The configuration of vital parameters of the system are identical between all controllers
• No generators have recently failed
• Load control has added priorities through the Min Loads Added Threshold
• The generator management order is valid
Once active, generator management will only go inactive if:
• A generator fails (shuts down with either a fault or user input)
• All generators are disconnected from the bus
• The Start Signal is removed
• Generator Management is disabled
• The configuration on any controller on the network is changed by a user
• The order becomes invalid
All the generators in the system must have the same setting for the stable delay for the generator management to operate. If
this parameter is changed, it will be updated on all the generators which are connected to the PGEN network.
Minimum Gens Online. Generator Management will always try to keep this many generators online (even if they are not
needed). All the generators in the system must have the same setting for the Minimum Gens Online for the generator
management to operate. If this parameter is changed, it will be updated on all the generators which are connected to the PGEN
network.
The purpose of this setting is to allow configuration to support large transient loads or potential generator failure
(N+1 redundancy).
Note:
Only 1 and 2 Minimum Gens Online is supported at this time.
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