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What is Auto Load Control (ALC) ?

Common guidelines in regards to the ASCO Load Bank Auto Load Controller (ALC) (Option R4)

The ASCO Automatic Load Control is an optional accessory for 1000 Series (radiator mount), 4000 Series (outdoor free standing), and 9000 Series load banks.
The Automatic Load Control (ALC) is a load bank accessory designed to add or remove load steps to maintain an approximate target load level on the generator to which the load bank is connected.
Only 1 CT is normally required/provided with R4 accessory. The ALC feature requires sensing of one phase (building load only).
ALC is set to maintain 60% of genset rating.
Load steps are configured on a case by case basis. Some situations warrant the ganging of load bank load steps.
There are 5 available load steps for the ALC accessory.
Wiring of the CT is to be completed by the customer in the field. Wire per local electrical code.
The default delay before applying initial load is set to 3 seconds. This allows the system to stabilize.
The default delay between adding load steps is 3 seconds.
Load step removal. When the load setpoint is met, it is immediate.
Delays settings are field adjustable up to 30 seconds.
ALC option can only be chosen for single voltage applications. It is not available on a dual voltage load bank.