The load monitoring relays monitor the mechanical load on motors, expressed by either the phase angle (power factor), or the total power consumption (voltage - current and power factor).

RP81

3-phase power factor monitoring
(cos phi).
Function selection.
Adjustable start-up delay.
Adjustable sensitivity.
1-pole relay output.

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1- or 3-phase power relay
(U x I x cos phi).
Function- and range selection.
Adjustable start-up delay.
Coarse and fine sensitivity adjustment.
Adjustable reaction delay.
1-pole relay output.

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1- and 3-phase power relay / monitor.
2 independent relay outputs.
Programmable  range, functions, delays,
setpoints and  hysteresis.

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3-phase torque monitor,
suitable for frequency converters.
Monitors the engine torque,
independant of the rotation speed.
Adjustable start-up delay,
reaction delay and setpoint.
1-pole relay output and
analogue output.

more details
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