Page last updated Jun 23, 2022 @ 05:02pm
Automatic Transfer Switch
100 amp, 120/240V, 1-phase
The RSS Automatic Transfer Switch combines dependability and flexibility in a small, economical package. RSS switches are suitable for standby power systems in residential and light commercial applications. The RSS100 and RSS200 products are built to satisfy the back up power requirements of virtually any residential or light commercial application.
The RSS products are Listed to UL 1008, the Standard for Transfer Switch Safety. Cummins products adhere to National Electrical Code (NEC) and National Fire Protection Association (NFPA) requirements.
RSS transfer switches monitor utility power 24 hours a day and 7 days a week. When utility power becomes unsatisfactory or fails; the controller signals the generator to start, then transfers the load. When stable utility voltage returns, the transfer switch will automatically switch electrical load from the generator to the utility. No action is required by the user.
Mechanically interlocked contactor
- A powerful and economical solenoid drives the mechanism
- Long-life, high pressure, silver alloy contact resists burning and pitting
Fully automatic control
- User-friendly front panel is configurable without special tools
- 12 hour exercise offset-Selectable exercise at repeatable intervals
Neutral and ground bar
- Fully rated
- Silver plated copper ground and neutral bus
Ease of connection
- Solderless screw type terminals for external power connections
PowerCommand® microprocessor control
PowerCommand® 20 control – A versatile, feature rich microprocessor-based control with LCD digital display and tactile-feel soft-switches for easy operation and screen navigation. Please see the PowerCommand® 20 control specification sheet S-6562 for the full description, benefits and features.
|Switch Current Rating||100 amps, 2 pole|
|Voltage Rating||120/240V, 1 phase, 60Hz standard (50Hz if controller setting changed in field)|
|Control Features (see notes
Detailed instructions contained in Owner Manual.
P.U. = pickup
D.O. = dropout
|Function||Adjustable Range||Factory Setting|
|start time delay1||0-10 sec adj||3 sec|
|transfer time delay2||0-300 sec adj||5 sec|
|retransfer time delay3||0-30 minutes adj||10 minutes|
|stop/cool down delay4||0-30 minutes adj||10 minutes|
|neutral delay (600A switch & above)||0-64 sec||10 sec|
|under voltage sensing of utility5||70-90% D.O. adj
90-95% P.U. adj
|frequency sensing of utility||---||---|
|voltage sensing of generator (1 leg)||75% D.O.
|frequency sensing of generator||75% D.O.
|generator test||with or without load||without|
|generator exercise||with or without load
|Exerciser Clock||integral to controller|
|Wire Size Ranges||#14 to 2/0 AWG (1 per line, 3 neutral)|
|UL Withstand & Closing Ratings||22,000 amps when
Square D QB, QD, QG, QJ breakers up to 125A or
Eaton JDC, KDC breakers up to 100A
|Nominal Dimensions (H x W x D)||24" x 17" x 7"|
1The start time delay prevents nuisance generator starts during momentary utility power variations.
2Transfer time delay allows generator set to stabilize before load is applied.
3Retransfer delay prevents needless power interruption if return of utility power is momentary.
4Stop delay allows gradual generator set cool down.
5Undervoltage sensing of utility supply provides reliable starting of generator set during brownout conditions.
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Item Number: RSS100
Price last updated 6/23/2022
Shipping Weight: 47 lbs.
This item normally ships in approximately 6 weeks or less.
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