ASCO J03ATSA20400FG0F AUTOMATIC TRANSFER SWITCH
400 AMP 2 POLE 240 VOLT, NEMA 3R ENCLOSURE

CONTROL AND DISPLAY PANEL

 

Easy to navigate 128x64 graphical LCD display with keypad provides LED indicators for switch position, source availability, not in auto, and alert condition.

 

STANDARD FEATURES

 

• Inphase monitor to transfer motor loads, without any intentional off time, to prevent inrush currents from exceeding normal starting levels.
  
  
• Engine exerciser to automatically test backup generator each week—with or without load for 20 minutes.
  
  
• Selective load disconnect control contacts (two provided) which operate with time delay prior to and/or after load transfer and re-transfer.
  
  
• 60Hz or 50Hz selectable switch. Three – phase/single - phase selectable switch.

 

VOLTAGE & FREQUENCY SENSING

 

• Three phase under and over voltage settings on normal and  emergency sources.
  
  
• Under and over frequency settings on normal and emergency sources.
  
  
• True RMS Voltage Sensing with +/-1% accuracy Frequency Sensing Accuracy is +/- 0.1Hz
  
  
• Voltage and Frequency parameters adjustable in 1% increments
  
  
• Selecting settings : single or three phase voltage sensing on normal, and single phase sensing on emergency; 50 or 60 Hz

 

COMMUNICATIONS FEATURES

 

Requires accessory 72EE

 

• Built in web server, with full display and control capabilities
  
  
• E-mail capability for system events, including e-mail to SMS text messaging.

 

REMOTE CONTROL FEATURES

 

• External Inputs for connecting:
  
  
• Remote test switch.
  
  
• Remote contact for test or for peak shaving applications. If emergency source fails, switch will automatically transfer back to normal source if acceptable.
  
  
• Inhibit transfer to emergency
  
  
• Remote time delay bypass switch emergency to normal

 

TIME DELAYS

 

• Engine start time delay – delays engine starting signal to override momentary normal source outages – adjustable to 0 to 6 seconds (Feature 1C)
  
  
• Transfer to emergency time delay – adjustable 0 to 60 minutes (Feature 2B)
  
  
• Emergency source stabilization time delay to ignore momentary transients during initial generator set loading – adjustable 0 to 4 seconds (Feature 1F)
  
  
• Re-transfer to normal time delay – adjustable 0 to 10 hours (Feature 3A)
  
  
• Unloaded running time delay for engine cool down – adjustable 0 to 60 minutes (Feature 2E)
  
  Pre and post signal time delay for selective load disconnect with a programmable bypass on source failures – adjustable0 to 5 minutes (specify ASCO Optional accessory 31Z)
  
  
• Adjustable time delay to override momentary normal source outages to delay all transfer switch and engine-starting signals.