• Under voltage monitoring with or without delay
  • Over voltage monitoring with or without delay
  • Phase sequence with or without delay
  • Fixed reaction time and adjustable setpunkt
  • Phase asymmetric monitoring with or without delay + combinations of these functions
  • 1-pole relay output 8 A - 250 VAC
  • 400VAC


C-mac® series FP is er specially developed to satisfy the requirements to safe and economical monitoring of the quality of the 3-phase supply voltage and to protect motors which is connected to the 3-phase voltages. 

The devices are sourced for DIN-rail mounting in a standard modul housing with front measuring 45 x 35 mm. This makes them suitable for mounting in M36 covers as well as in industriel controls. All devices can be connected to 3-phase supplies with or without neutral, and it is equipped with a 1-pole relay output.

FP-series consists of the following variants:
FP30: Combined under- and over voltage relay with fixed reaction time and adjustable setpunkt.
FP31: Phase sequence/phase asymmetry relay with fixed reaction time and adjustable setpunkt.
FP34: Combined phase sequence and over-/under voltage relay with fixed reaction time and adjustable setpunkt.
FP35: Combined over- and undervoltage relay with fixed setpunkt and adjustable reaction time.

Same function princip for all FP-modules:
When the supply voltage is connected, and the parameters what must be monitored are within the chosen limits, the output relay vil activate. If one or more of the parameters are outside the chosen limits, the relay will drop off. The relay function can be chosen with or without time delay, dependant of the module type. 

Sensivity and accuracy:
All devices are universal for 3-phase supply with or without hole. Internal in the module the 3 phase signals are measured in relation to neutral, and all adjustments is done with neutral connected. 
If the device is used in an installation without neutral connected, the device generates its own neutral-reference. In this case the sensivity of the device is dependent of the way the 3-phased phase signals are moving in accordance to each other: If all phases are alike, for instance 10% lower than the nomonal values, the sensivity and the accuracy the same as if neutral was connected, because the internal neutral-reference will be the same. If only one of the phases are changing, the result is, that the internal neutral will move in accordance to correct neutral, and the sensivity will be reduced up to 25%. 

Dimensions: 90 x 35 x 57 mm

Mastervarenr. FP31-400
Mastervare Yes