ASCO Series 300SE Controller Standard Features and Design Criteria 

Standard Features:

• Motor load transfer controls (inphase monitor) to keep motors operating during transfer.
• Pre-transfer & post-transfer load disconnect contacts for signaling motor starters, elevators, VFDs and other selected loads.
• Standard Engine Exerciser for weekly automatic testing of engine generator set with or without load.
• Selectable control switches for voltage, frequency, time delay settings & additional control features.
• Switch position lights, source availability lights, test switch and time delay bypass switch.

Electromagnetic Computability Testing:

• IEC801-2 Electrostatic discharge (ESD) immunity
• ENV50140 and IEC 801 – 3 Radiated electromagnetic field immunity
• IEC 801 – 4 Electrical fast transient (EFT) immunity
• ENV50142 Surge transient immunity
• ENV50141: Conducted radio-frequency field immunity
• EN55011: Group 1, Class A conducted and radiated emissions
• EN61000 –4 – 11 Voltage dips and interruptions immunity.

Additional Design Criteria:

• ANSI C37.90A/IEEE 472 Voltage Surge Test.
• NEMA ICS – 109.21 Impulse Withstand Test.
• Digital circuitry isolated from line voltages.