Woodward Automatic Generator Loading Control Relay Part No. 9905-096-j

US $600.00

Coatesville, Pennsylvania, United States
Feb 28th

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The AGLC Automatic Generator Loading Control is used to soft load in and out of a load sharing loop: Loading is initiated by a generator circuit breaker auxiliary contact. Unloading is initiated by a momentary opening of an unload contact. When the circuit breaker closes, the load will be increased at the preset ramp rate until matched with other units. The AGLC then tracks the load on the set and, on the unload signal causes the set to unload at the ramp speed. When the unload trip level is reached, a relay activates in the AGLC which can be used to open the breaker for a smooth, bumpless power transfer. The AGLC is used to base load 1 to 15 generator sets joining a utility: The base-load reference switch is closed or jumpered, and the control automatically causes the system to ramp to the preset base-load level after the breaker closes. The base load is set with an internal potentiometer, or an external potentiometer. The base load setting can be used to increase or decrease load on the set or on the system. A limit prevents the base load from being set higher than the maximum desired load. The AGLC is used to unload a generator set before leaving the bus: The unload trip level is adjusted by a potentiometer on the AGLC, or by an external potentiometer. When the unload switch is momentarily opened, the AGLC causes the set or system to ramp down to the previously set trip point where it stops unloading and activates a relay which can be used to open the breaker. The relay resets when the breaker opens. The trip level can be matched to blower or pump loads on the machine before closing the bus. This use eliminates a shift of load and bump when separating from the rest of the system. Description The AGLC Automatic Generator Loading Control is for use with Woodward load sharing and speed control systems with either built-in or external load sensors. It is designed to provide soft loading or unloading of a generator set into or out of a load sharing system at controlled rates. It can also soft load or unload a single unit, or up to 15 paralleled load sharing units, into or out of parallel with a utility, and then set a specific base load on the generating system. The versatile control simplifies the logic and wiring required to perform these functions. The electronic ramps are easily adjusted from 5 seconds to 5 minutes for 100 percent load change. (Actual load and unload times will depend on the capabilities of the engine.) The load and unload ramp rates are separately adjusted. The AGLC tracks the load on the generator set at all times and starts the ramp at the load on the set, eliminating any bump and providing smooth transfer of power, whether loading or unloading.