OVM
Recognition of overvoltage Setting voltage range adjustable from 20 to 120% of voltage limit Relay OFF delay time adjustable from 0.15 to 10 seconds 2 signals:
- PWR: Input voltage
- FAULT: Fault condition
Principles of Operation:
When supply and input sample voltages are connected to terminals Al. A2 and U. V respectively and in addition. voltage is in alowed range. device intemal relay would be open(intemal contact of terminal 15 to 18 & established) and PWR and FAULT signals would be on and off respectively.
If input sample voltage is higher than the limit adjusted by VOLT potentiometer handle. device stars timing and at the end of fime adjusted by DELAY potentiometer handle. FAULT signal gets ON and device internal relay closes (internal contact of terminal 15 to 14 is mode).
lf input sample voltage decreases into allowed range during the obove adjusted time. relay remains intact.
lf input sample voltage decreases into allowed range after FAULT signal gets ON. FAULT signal gets OFF and device intemal relay opens (internal contact of terminal 15 to 18 is made).
lf J terminals are separated from each other. the device would be restarted auto- matically every time after fault occurence and its correction.
lf J tenminals are connected together. the device should be restarted by RESET button every time after fault occurence and ifs comection.
Installation and Start-Up:
Supply voltage 6 connected to terminals Al and A2.
Input sample voltage should be connected to terminals U and V of overvoltage relay. Terminals 15, 16 and 18 are the device intemal relay contact points which will be put in control circuit if required.
For example. to activate an alarm or to disconnect the main contactor control.
The limit from which input sample voltage should not exceed is set by VOLT adjusting potentiometer handle. This is adjustable from 20 to 120%.
Infernal relay OFF delay time duration is set by DELAY timer adjusting potentiometer han- dle. This time is adjustable trom 0.15 to 10 seconds.
Attention: In the case of DC input sample voltage. positive and negative poles have to be connected to U and V respectively.
Technical Specifications:
Supply Voltage: 220 VAC + 10%
Network Frequency: 504 5 Hz
Internal Loss: About 3 W
Voltage Limit: 10-110-220-500 V AC/DC
Voltage Range: 20 to 120% of voltage limit adjustable by VOLT potentiometer handle
OFF Delay: 0.15 to 10 seconds. adjustable by DELAYpotentiometer handle
Output Relay: Single-C/O contact a Contact Current: 6 A. 220 VAC- 6A, 28 VDC
