ABB Vmax MO Release

Shunt opening release (-MO1)

This allows remote opening control of the apparatus.
The release can operate both in direct and alternating current. This release is suitable for both
instantaneous and permanent service. In the case of instantaneous service, the minimum current
impulse time must be 100 ms.
Characteristics
Optional accessories
The accessories identified with the same number are alternative to each other.
Un: 24 – 30 – 48 – 60 – 110 – 125 – 220 – 250 V–
Un: 24 – 48 – 60 – 110 – 120…127 – 220…240 – V ~ 50 Hz
Un: 110 – 120 – 127 – 220 – 240 – V ~ 60 Hz
Operating limits: 65 … 120% Un
Power on inrush (Ps): DC = 200 W; AC = 200 VA
Inrush duration: about 100 ms
Continuous power (Pc): DC = 5 W; AC = 5 VA
Opening time: 33…60 ms
Closing time: 45…80 ms
Insulation voltage: 2000 V 50 Hz (for 1 min)
V/DC
Volt-Ampere characteristic curve,-MC/-MO1/-MO2
Note: If monitoring the functions of the shunt closing release (-MC) and opening releases
(-MO1, -MO2) is required:
Releases with rated voltage of 110V/220V AC/DC can be monitored without STU device:

Vmax Volt-Ampere Curve

 

 

 

 

 

 

At a power supply of 110V~130V, connect the “Control Coil Continuity” device, or a relay or a
signalling lamp which consumes a current not exceeding 20mA.
At a power supply of 220V~250V, connect the “Control Coil Continuity” device, or a relay or a
signalling lamp which consumes a current not exceeding 10mA.
For releases with rated voltage range fange from 24V to 60V DC, the only device able to
carry out monitoring is the STU device. Please contact us for more information.