UVM

Recognition of undervoltage

Setting voltage range adjustable from 5 to 100% of voltage limit

Relay OFF delay time adjustable from 0.15 to 10 seconds

2 Signals

  • PWR: Input voliage
  • FAULT: Fault condition


Principles of Operation:

When supply voltage and input sample curent are connected to terminals Al. A2 and terminas K. Lrespectively and in addition current is in alowed range. device intemal re- lay would be open (intemal contact of terminal 15 to 18 is established). PWR and FAULT signals would be on and off correspondingly.

lf inout sample current is over the limit set by CURR potentiometer handle. the device starts fiming and at the end of time adjusted by DELAY potentiometer handle. FAULT signal gets ON and device intemal relay closes (internal contact of terminal 15 to 16 is made).

If input sample curent decreases into allowed range during the above adjusted time. relay remains intact.

After FAULT signal getting ON. if input sample voltage decreases into allowed range. FAULT signal gets OFF and device intemal réloy opens (intemal contact of terminal 15 to 18 is made)

If J tenminals are separated from each other. the device would be restarted automatically every time after fault occurence ond its correction.

lf J terminals ore connected together. the device should be restarted by RESET button every fime after fault occurence and its correction.

Installation and Start-Up:

Supply voltage is connected to terminals Al and A2.

Input sample current should be connected to terminals K and L of overcurrent 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 of to disconnect the main contactor control.

The limit from which input sample current should not exceed is set by CURR adjusting potentiometer handle. This is adjustable from 20 to 120% of current limit.

Intemal relay OFF delay time duration is set by DELAY adjusting potentiometer handle. This time is adjustable from 0.15 to 10 seconds.

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

Vollage Range: 5 to 100% of voltage limit adjustable by VOLT potentiometer handle

OFF Delay: 0.15 to 10 seconds. adjustable by DELAY potentiometer handle

Output Relay: Single-C/O contact

Contact Current: 6 A. 220 VAC- 6A. 28 VDC