ATS Popular Features and ATS Popular Features and AccessoriesAccessories

John J. StarkJohn J. StarkMarketing Services Coordinator, Russelectric Inc.Marketing Services Coordinator, Russelectric Inc.

ATS Timing Features and Important Commonly Used Accessories

Utility/Gen. Time delay to override momentary source 1 power Utility/Gen. Time delay to override momentary source 1 power outages to delay engine start signal and transfer switch operation outages to delay engine start signal and transfer switch operation (delay for generator start). Programmable 0.0-259 min, factory (delay for generator start). Programmable 0.0-259 min, factory set at 3.0 seconds.set at 3.0 seconds.

Utility/Utility. Time delay to override momentary source 1 Utility/Utility. Time delay to override momentary source 1 power outages to delay transfer switch operation (time delay for power outages to delay transfer switch operation (time delay for utility sag). Programmable 0.0-30.0 seconds, factory set at 0 utility sag). Programmable 0.0-30.0 seconds, factory set at 0 seconds. seconds.

ATS Timing Features and Important Commonly Used Accessories

Time delay to control contact transition time from neutral to non-Time delay to control contact transition time from neutral to non-preferred source. Programmable 0.0-10 min, factory set at 1 preferred source. Programmable 0.0-10 min, factory set at 1 second. second.

Time delay to control contact transition time from neutral to Time delay to control contact transition time from neutral to preferred source. Programmable 0.0-10 min, factory set at 1 preferred source. Programmable 0.0-10 min, factory set at 1 second. second.

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ATS Important Commonly Used Accessories

Load test function (internal) to simulate source 1 power failure. Load test function (internal) to simulate source 1 power failure.

Toggle operated load test switch to simulate Toggle operated load test switch to simulate source 1 power failure. source 1 power failure.

Contact closure provided by customer to simulate Contact closure provided by customer to simulate source 1 power failure. source 1 power failure.

Remote Load test function energized by 24 VDC signal from Remote Load test function energized by 24 VDC signal from generator control switchgeargenerator control switchgear to simulate source 1 power failure. to simulate source 1 power failure.

Internal form “C” contact to initiate engine starting Internal form “C” contact to initiate engine starting or other customer functions (24 VDC Signal by or other customer functions (24 VDC Signal by others)others)

ATS Timing Features and Important Commonly Used Accessories

Time delay on retransfer to preferred source Programmable 0.0-Time delay on retransfer to preferred source Programmable 0.0-259 min, factory set at 30 minutes.259 min, factory set at 30 minutes.

Pushbutton to bypass time delay on retransfer to source 1.Pushbutton to bypass time delay on retransfer to source 1.

Programmable function to bypass time delay on retransfer to source 1. Programmable function to bypass time delay on retransfer to source 1.

Engine overrun to provide unloaded engine operation after Engine overrun to provide unloaded engine operation after retransfer to source 1 (delay for engine cool down), retransfer to source 1 (delay for engine cool down), programmable 0.0-60 min, factory set at 5 minutes.programmable 0.0-60 min, factory set at 5 minutes.

ATS Timing Features and Important Commonly Used Accessories

Load shed function energized by 24 VDC signal from generator control Load shed function energized by 24 VDC signal from generator control switchgear to disconnect the load from the source 2 source when an switchgear to disconnect the load from the source 2 source when an overload condition occurs. An automatic load shed feature is provided. overload condition occurs. An automatic load shed feature is provided. Whenever LSF is enabled the source 2 frequency is compared to the load Whenever LSF is enabled the source 2 frequency is compared to the load shed frequency pick-up and drop-out values. When the source 2 shed frequency pick-up and drop-out values. When the source 2 frequency is less than the load shed frequency drop-out value 93% (56 frequency is less than the load shed frequency drop-out value 93% (56 Hz) and the load shed timer has expired, then a load shed condition is Hz) and the load shed timer has expired, then a load shed condition is initiated. The load shed timer is adjustable from 0-9999 seconds and initiated. The load shed timer is adjustable from 0-9999 seconds and factory set at 1 second. factory set at 1 second. Once the source 2 frequency is greater than or Once the source 2 frequency is greater than or equal to the load shed frequency pick-up value 96% (58 Hz), then the load equal to the load shed frequency pick-up value 96% (58 Hz), then the load shed condition is removed. shed condition is removed. Ancillary benefit: Dual operator is beneficial Ancillary benefit: Dual operator is beneficial with this design so ATS doesn’t have to load shed to a dead source.with this design so ATS doesn’t have to load shed to a dead source.

24 VDC24 VDC

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ATS Timing Features and Important Commonly Used Accessories

Block transfer function energized by 24 VDC signal from generator Block transfer function energized by 24 VDC signal from generator control switchgear to block or allow transfer to source 2 (typically control switchgear to block or allow transfer to source 2 (typically generator), so as not to overload it. This accessory includes an generator), so as not to overload it. This accessory includes an internal programmable function to bypass the block transfer internal programmable function to bypass the block transfer function, and is used for manual operation. A two-position key function, and is used for manual operation. A two-position key operated selector switch to bypass the block transfer function, mayoperated selector switch to bypass the block transfer function, mayalso be spec’d for manual operation. (Spring return from transfer to also be spec’d for manual operation. (Spring return from transfer to auto.)auto.)

24 VDC24 VDC

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Arc Flash, Things to ConsiderArc Flash, Things to Consider

•External Manual Operator External Manual Operator (EMO)(EMO)

Can ATS also be manually Can ATS also be manually transferred safely under load?transferred safely under load?

•Shutter (bus isolation) AssemblyShutter (bus isolation) Assembly

•CCDPCCDP

•Barriered CompartmentsBarriered Compartments (bypass/isolation switches) (bypass/isolation switches)

•All controlAll control switches switches mounted on mounted on outside outside

•All pertinentAll pertinent labeling affixed labeling affixed to the outside of to the outside of cabinet, including, cabinet, including, model #, Serial #, model #, Serial #, and emergency and emergency phone # phone #