This control continuously monitors
3-phase power lines for abnormal conditions. When properly adjusted, the control will
detect: • phase loss on a loaded motor, regardless of regenerated voltage
• low voltage on all phases • very low voltage or loss on any single phase • phase reversal
If none of
the above conditions are present, the control will energize the internal relay and the
indicator light will be green. When any of the above faults are detected, the indicator
light will turn yellow for approximately 3 seconds warning that the relay is about to
de-energize. After the delay time the relay will de-energize and the indicator light will
turn red. When the fault is corrected, the monitor will automatically reset by energizing
the relay and the indicator lamp will be green. Should the fault be corrected during the
delay time, the monitor will not de-activate the relay and the indicator will again be
green. Adjustment: Apply 3-phase power within operating range to the monitor (Phase
sequence must be observed). Turn adjustment to maximum clockwise position. Indicator lamp
will be illuminated red after the delay time. Slowly turn counterclockwise until indicator
changes to green (relay will activate ). If voltage is nominal, setting should be correct.
Note: If phase sequence is incorrect, the
monitor will not activate. Reverse any two input leads and readjust as described above.
File #E59090
Low Cost
Tri-Color Status LED
3 Second Fault Delay Timer
Line Voltage Setpoint Adjustment Range: 160 VAC to
240 VAC
50/60 Hz Operation
S.P.D.T. 10 Amp Relay Output
Convenient Plug In Package
100% Life Tested
Made in U.S.A.
Setpoint Adjustment: Single turn potentiometer for adjusting nominal voltage
Range: 160 - 240 VAC 60 Hz LO to HI 180 -
240 VAC 50 Hz LO to HI Accuracy: Min. setting (max. CCW) Must operate
(green light) at 160 VAC, 60 Hz (180 VAC, 50 Hz) line to line Max. setting (max. CW) Must drop out (red
light) at 240 VAC 50/60 Hz line to line Hysterisis: 2% typical Fault Delay Time: 2 to 4 sec.
Input 3 Phase Operating Voltage: Three wire connection, no neutral required 160 - 240 VAC , 277 VAC max. line to line 60 Hz
180 - 240 VAC , 277 VAC max. line to line 50 Hz Power Consumption: 3 W max. @ 277 VAC line to line exclusive of load
Frequency: 50/60 Hz
Output Contact Type: Relay S.P.D.T. (1 form C) Silver Cad. Oxide material Rating: 10 amp. max.
resistive, 1/3 HP, 345 VA, 120 / 240 VAC Life: Mechanical -10,000,000 operations
Full Load - 500,000 operations
Display: 1 tricolor LED Green indicates status OK
Yellow indicates fault condition imminent
Red indicates fault condition
Protection Transient Voltage: protected by three 30 joule metal oxide varistors
Dielectric Breakdown: 1500 volts RMS minimum at 60 Hz between input and outputs and
between outputs
Mechanical Termination: 8 pin plug Mounting:
Socket Mount : Part Number MSO-0008P-012
Environmental Storage Temperature: -23°C to 70°C Operating Temperature: -23°C to 55°C
File #E59090
