OLM

Recognition of changes in phase sequence Thermal-Relay Replacement

Very long durable electronic circuit

Accurate and reliable in all conditions

Independency of environment temperature

Mechanical depreciation free

Having versatile mechanical ranges

1-5 A, 4-10 A, 6-15 A, 12-30 A, 24-60 A, 5-50 A

Capability of setting OFF delay time by DELAY potentiometer handle

Capability of current adjustment by AMPERS potentiometer handle

Having two operation modes, automatic and lockable (by terminals K1 and K2)

2 Display Signals:

FAULT: Fault status

OUT: Output energization

Principles of Operation:

Boma load control relay is designed to protect three-phase devices against overcur- rent. Moreover. it is. a good replacement for bimetal.

Installation and Start-Up:

Terminal Al and A? have to be connected to network elecincity. Termminas 15 and 18 should be put in series with contactor Winding. Curent wires should pass through device tubes. With connection of network electricity to terminals Al and A2. OUT signal gets ON. contact of terminal 15 to 18 is made and device is ready to protect. By pushing START button in power circuit. system starts. lf motor starting current is over the limit adjusted by AMPERS potentiometer handle. FAULT signal gets ON ond will get OFF after start.

Attention: It should be noticed to set starting time duration by DELAY potentiometer handle so that output is not de-energized at starting time. In the case of any fault during operation. FAULT signal gets ON. Then at the end of time adjusted by DELAY potentiometer handle. OUT signal gets OFF and device intemal relay closes. In the case of fault comection during the adjusted time. FAULT signal gets OFF and out- put relay does not close. When terminals K) and K2 have to be not connected together. the device should be restarted by RESET button after fault correction. When teminals K] and K2 are connected together. the device would start automatically after a fime about 50 seconds.

 Technical Specifications:

Supply Voltage: 220 VAC + 10%

Network Frequency: 50 +5 Hz

Internal Loss: 3 w

OFF Delay: 1-20 seconds-adjustable by DELAY potentiometer handle

ON Delay: 50 seconds atter fault corection

Curent Range: 1-5A.410A.615A.1230A. 24 60A.5-50A

Output Relay: Single-C/O contact

Contact Current: 6 A. 220 VAC