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50A Plus Hardwire - Model 40250
Automatic Transfer Switch

120/240V, 50A, 60 Hz

The Surge Guard Plus transfer switch provides premium protection for your motorhome.  This model provides enhanced features over other transfer switches on the market.  The unit continuously measures shore power and will switch to generator power when shore power electrical conditions are beyond limits.  Higher joule ratings, increased contactor ratings and a remote monitor make this unit widely accepted in the marketplace.  Additional features include:

  • Total electrical protection from faulty park power and generator power.
  • Provides the following protection:
    • Multi-mode surge suppression (fuse protected)
    • Low (<95V) and High (>132V) Voltage
    • Mis-wired pedestal
    • Open neutral
    • Open ground
    • Reverse polarity
    • High and low frequency
  • Optional 2-line plain English display (display p/n 40272 & cable p/n 40258) with continuous visual indication of source voltage, load current or diagnostics.
  • Transfers to either shore power or generator power automatically when energized after 30 second delay in generator mode.  When both shore power and generator power are available, generator dominates after a 20-30 second delay.  Once the generator is shut down, shore power activates after a 3/4 second delay.
  • 65A, FLA full-rated contactor.
  • UL Approved ATS - full transfer switch rating, UL1008, (not Industrial control equipment UL508).
  • 3350 Joules of power surge protection.

Automatic Transfer Switch 50A Plus Product Sheet

Automatic Transfer Switch 50A Plus Users Manual

Automatic Transfer Switch 50A Plus Troubleshooting Guide

"Before You Call Guide" - Additional Troubleshooting Help

 

 

 

Part NumberFeaturesConfigListed
40250
  • Rated 120/240V, 50A
  • Frequency: 60Hz
  • 3350 Joules
40272
  • Optional Display
40258
  • Cable for Optional Display

 

 

 

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