DWB03 and PWB03 are precise TRMS active power monitoring relays for 3-phase balanced systems.

They can be used for monitoring the actual load of asynchronous motors and other symmetrical loads, as well as to see if the power flows in the correct direction.

Start/stop input allows to use a manual switch to start and stop the system, without the need of an auxiliary device.

The advantage of using the latch function is that the alarm status can be kept even after the end of the alarm condition.

The LED’s indicate the state of the alarm and the output relay.

Features

• TRMS active power relays for three phase balanced applications

• Measuring if active power is within set limits

• Measure their own power supply

• Measuring ranges: 5A, 10A, MI current transformers

• Power ON delay 1 to 30 s knob selectable

• Separately adjustable upper/lower level on relative scale

• Programmable latching or inhibit at set level

• Automatic and manual start and stop of the system

• Output: 8 A SPDT relay N.D. or N.E. selectable

• For mounting on DIN-rail in accordance with DIN/EN/ EC 60715 (DWB03) or plug-in module (PWB03)

• 45 mm Euronorm housing (DWB03) or 36 mm plug-in module (PWB03)

• LED indication for relay, alarm and power supply ON