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Iota ITS50R Iota ITS50R Iota ITS50R Iota ITS50R Iota ITS50R
Esco-ES350.jpg (9080 bytes) Esco-LPT50BRD.jpg (5225 bytes)
Esco ES350 Wiring Esco ES350 Esco LPT50BRD Esco LPT50BRD
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Automatic Transfer Switch
120/240VAC, 50 amp

Safely connect an inverter and an AC generator to the same house wiring.  Switch can be used with inverters that do not have built-in transfer switch capability.  If the generator is not running, the inverter is connected to the house wiring.  When the generator is started, the house wiring is automatically disconnected from the inverter and connected to the generator.  A time delay feature allows the generator to warm-up before the transfer takes place.  DC coils on relays eliminate chatter on low voltage.

Also can be used to transfer between an RV generator and "shore" power.

If system is 120VAC only (no 240VAC) you must connect to "HOT 1" on this switch.  Connecting to "HOT 2" is optional.


Comparison with Other Transfer Switches
(some features not included can be added by user with additional auxiliary relays)

Feature ITS50R
Higher Cost Automatic Transfer Switches
Generator Capacity 50 amp (12 kW max) 200 amp (48 kW)
or larger
Generator output sensed before transfer Yes Yes
Time delay before loading generator Yes Yes
Under voltage sensing starts generator Not Included Yes
Automatic retransfer when utility restored No Yes
Automatic generator exerciser clock No Usually included
Engine battery trickle charger No Usually included
Short circuit rating Low Medium-High
Factory Warranty 2 years
1 year
1 year
Dimensions 7.5" x 8.5" x 4"
8.5" x 8.5" x 4.5"
12" x 10" x 6


Iota ITS50R Esco LPT50BRD
Esco ES350 (3 source switch)