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ASCO Series 185 Residential Microprocessor Controller
Voltage and Frequency Sensing
• Adjustable single phase sensing on normal source
• Normal source pickup voltage is adjustable to either
198 volts or 209 volts; drop-out is adjustable to four
incremental settings, 154 volts, 176 volts, 187 volts,
or 198 volts
• Frequency sensing on emergency source. Pickup is
57 Hz (nom 60 Hz) or 48 Hz (nom 50 Hz), and dropout
is 51 Hz (nom 60 Hz), and 43 Hz (nom 50 Hz)
The ASCO group 4 Microprocessor Controller
is used with all sizes of the S
erieS 185 Power
Transfer Switches. Includes as standard all of the
voltage, frequency, control, timing and connectiv-
ity functions required for most optional standby
power applications.
Standard Selectable Features
• Engine exerciser to automatically test backup
generator each week - Includes control switch for
testing with or without load
• Selective load disconnect, double - throw contact to
operate at an adjustable 0 - 20 second adjustable time
delay prior to transfer and reset 0 to 20 seconds after
transfer
• 60 Hz or 50 Hz selectable switch
Remote Control Feature
Terminal provisions for connecting :
• Remote test switch
• Remote test switch with automatic transfer
• Remote time delay bypass switch
Control and Interface Panel -
User - friendly control interface with intuitive symbols
and visual indicators to inform operator of transfer
switch and power source status
8
Control and Interface Panel
ASCO S
erieS 185
Microprocessor Controller