Transfer Switches and Load Control
Generator Transfer Switches & Load Control in Pembroke, MA
What’s an Automatic Transfer Switch? (ATS)
Meet the brains behind your home generator system. With a home standby generator the ATS is always monitoring your home’s power from the utility company. When the ATS sees an interruption in power or the power source drops below an unacceptable rate, the ATS takes over, starts your generator and life goes on without interruption.
When utility power is restored, the ATS turns off your generator and returns your home’s power to the utility grid. Pretty cool, huh? Below are the most commonly seen ATS’s in the industry. This is not intended to be a complete list.
RXT Standard Features
- Allows utility voltage display on the RDC2/DC2 integrated generator set/transfer switch controller, available exclusively on Kohler residential and light commercial generator sets
- Interface board for connection to the Model RDC2 or DC2 generator set/transfer switch controller (mounted on generator set models listed above) UL listed
- Models with load centers, UL 67 listed, file #E251086
- Models without load centers, UL 1008 listed, file #E58962
- CSA certification is available, file #LR58301 (not applicable to service entrance or load center models)
- Corrosion-resistant NEMA 3R aluminum enclosure: Padlockable
- Approved for indoor or outdoor installation
- ANSI 49 gray
- NEMA 1 enclosure available on 100 amp load center models
- Contactor electrically and mechanically interlocked
- Double throw inherently interlocked design
- Contactor manually operable for maintenance purposes
- Silver alloy main contacts
- Transfer switches are 100% equipment rated and can be applied at the rated current without derating (non-service entrance models)
- 100, 200, and 400 amp standard and service entrance models are available; see page 6 for available models
- 100 amp standard single-phase models are available with or without 16-space load center. Up to 8 tandem breakers can be used for a total of 24 circuits.
- Service entrance models include disconnect circuit breaker on the utility (normal) source side (80% rated)
- Five-year limited warranty
RDT Standard Features
- UL listed Models with load centers, UL 67 listed, file #E251086
- Models without load centers, UL 1008 listed, file #E58962
- CSA certification available, file #LR58301 (not applicable to service entrance or load center models)
- 220/240 VAC, 50/60 Hz (selectable)
- 100, 200, and 400 amp models available
- Two-pole, single-phase open-transition transfer switch
- Contactor electrically and mechanically interlocked
- Double throw inherently interlocked design
- Solid neutral
- Contactor manually operable for maintenance purposes
- Silver alloy main contacts
- All models are 100% equipment rated and can be applied at the rated current without derating
- 100 and 200 amp models available with or without prewired Square D type QO load center
- 100 amp load center models use up to 16 circuit breakers (up to 8 tandem breakers can be used for a maximum of 24 circuits)
- 200 amp load center models use up to 24 circuit breakers
- 200 amp service entrance model with 42 circuit breaker load center is available
- Two enclosures available
- NEMA Type 1 steel ANSI 49 gray enclosure for indoor installation. 100 amp and 200 amp models without load centers can be recess-mounted between wall studs (not service entrance model)
- NEMA Type 3R corrosion-resistant aluminum ANSI 49 gray padlockable enclosure. Approved for indoor or outdoor installation
- Five-year limited warranty
Load Management
- The Load Control Module (LCM) sheds loads to prevent generator overload, in compliance with NEC 2008.
- The LCM monitors generator current and frequency to determine when to shed loads. This monitoring prevents frequency drops that can damage valuable electronics like computers and televisions.
- Load management with the LCM allows the use of a smaller generator set.
Priority Setting
- Loads are added and shed according to their priority. Load 1 is the top priority, which is added first and shed last. Load 6 is the lowest priority.
- Less critical loads can be turned off automatically when essential appliances are running.
- Load priorities are hard-wired at installation.
Standard Features
- The LCM can be used with Kohler generator sets equipped with the RDC2 or DC2 controller, including the following models:
- 14RESA and 14RESAL
- 20RESA and 20RESAL
- 38RCL
- 48RCL
- Automatically manages up to six residential loads:
- Four power relays for management of non-essential secondary loads. Two 50 amp loads and two 40 amp loads can be connected.
- Two HVAC relays to control two independent air conditioner loads.
- User interface for load status indication:
- An industry first: Test button allows the operator to cycle the relays in the order of their priority (only functions when the generator set is in RUN mode).
- Dual color LEDs for each load indicate load status (powered or shed) and flash to indicate a test.
- NEMA 3R aluminum enclosure for indoor or outdoor installation.
- Available with two wiring options:
- With 2-foot color-coded pre-wired harness for easy installation of the LCM next to the distribution panel.
- With terminal block connections for installation of the LCM in any location.
- UL listed.
- CSA certification is available.
Load Shed Kit
Applicable Models
- RXT Automatic Transfer Switch (without load center)
- RDT Automatic Transfer Switch (without load center)
- RDT 200 amp service entrance rated transfer switch with 42-circuit load center
- phase generator set equipped with the RDC2 or DC2 controller is required. The load shed kit operates with the following generator set models: *
- 14RESA and 14RESAL
- 20RESA and 20RESAL
- 38RCL
- 48RCL
Standard Features
- Automatically manages up to six residential loads:
- Four customer-provided power relays can be connected for management of non-essential secondary loads.
- Two HVAC relays to control two independent air conditioner loads are included.
- Current transformer for load monitoring is provided.
- The load shed kit mounts inside the enclosure on Kohler Model RXT and RDT automatic transfer switches.
Load Management
- The load shed kit disconnects non-critical loads to
- prevent generator overload, in compliance with NEC
- 2008.
- The load shed kit monitors generator current and frequency to determine when to shed loads. This monitoring prevents frequency drops that can damage valuable electronics like computers and televisions.
- Load management with the load shed kit allows the use of a smaller generator set.
Priority Setting
- Loads are added and shed according to their priority. Load 1 is the top priority, which is added first and shed last. Load 6 is the lowest priority.
- Less critical loads can be turned off automatically when essential appliances are running.
- Load priorities are hard-wired at installation.
