SEAL 5P4941 - Caterpillar

Load Shed Control
The "Load Shed Control" is accessed from the "Load Shed Control" select menu bar.
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Load shed control menu bar (1) Load shed control buttonThe "Load Shed Control" enables the operator to alter the shed level of each generator load shed relays, manually control each load shed relay, and alter the functionality of the systems load shed operation.
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Load shed control screen (2) Load shed level (3) Load sense load shed switchSettings that determine the behavior of the "Load Sensitive Load Shed" operation can be set from the "Load Shed Settings" screen.Load Shed Level (2) - Each generator has a 4 - pole "Load Shed" relay. This setting determines the "Shed Level" of that relay. A level of 0 acts as essential loads, meaning the loads will never be shed. A level greater than the number of generators on the system will act as non-essential, shedding the loads during emergency mode.Load Sense Load Shed switch (3) - Turns "Load Sensitive Load Shed" on or off. If the "Load Sense Load Shed" switch is OFF, load shed operates in conditional mode only, meaning that the shed level is calculated as simply the total number of generators on the bus. If the Load Sense Load Shed switch is ON, Load Sensitive Load Shed will be enabled, following a time delay. Load Sensitive Load Shed calculates the current shed level of the system by comparing the current generator load to the "Add Percent" or "Shed Percent" settings, and increasing or decreasing the shed level accordingly.Load Shed Settings
The "Load Shed Settings" screen is accessed directly from the "Main Menu".
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Load shed setting screen (4) Add percent (5) Shed percent (6) Add delay (7) Shed delay (8) Load sense delay (9) Overload percentThe "Load Shed Setting" screen allows for the adjustment of the levels that control when load is shed and when load is added.Add Percent (4) - Percent of total system capacity that system load must be below in order to add loads.Shed Percent (5) - Percent of total system capacity that system load must be above in order to shed loads.Add Delay (6) (for each generator) - Number of minutes to wait before adding this level of loads to the bus.Shed Delay (7) (for each generator) - Number of seconds to wait before shedding this level of loads from the bus.Load Sense Delay (8) - Number of minutes to delay entering load sensitive load shed (to allow loads to stabilize).Overload Percent (9) - When system load exceeds this percentage of total capacity, a fast shed operation will be triggered.