OCM

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 voltage
  • FAULT: Fault condition


Principles of Operation:

When supply voltage and input sample current 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 13 is established). PWR and FAULT signal would be on and off cormespondingly.

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

If inout sample current decreases into allowed range during the above adjusied time. relay remains intact.

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

lf J terminals are separated from each other. the device would be restarted au- tomatically every time after fault occurence and its corection.

lf J terminals aré connected together. the device should be restarted by RESET but- ton every time after fault occumence 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. Terminal 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 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: 50 + 5 Hz

Internal Loss: About 3 W

Current Limit: 5 A AC and by use of current transformator for higher currents

Curent Range: 20 to 120% of current limit adjustable by CURR potentiometer handle

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

Output Relay: Single-C/O contact

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