Phase monitor RK 9872

Article number: 0065075
Type: RK9872.11 3/N AC400/230V 50/60HZ

The space saving phase monitor RK9872/800 from the Varimeter family monitors under- and... more

Product description

The space saving phase monitor RK9872/800 from the Varimeter family monitors under- and overvoltage as well as phase sequence in 3-phase systems. The response values are fixed. When connecting the measuring voltage to the inputs L1-L2-L3 and fault free system the relay switches on. When the measuring voltage is connected the unit checks a clockwise phase sequence. If this is not the case the yellow LED flashes. The output relay will not energise. After detection of under- or overvoltage on one or more phases for more the 5 sec. the relay switches off. The relay stays off for at least 2 seconds. The phase monitor measures the arithmetic mean value of the 3 phases against neutral.

Technical specifications

Measuring range max.:	400 V
Standard measuring range:	3/N AC 400/230 V
1- / 3-phase:	3
Output contacts:	1 C/O contact
Width:	17,5 mm
Enclosure design:	Distribution board
Type:	RK 9872

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Advantages

Reliability monitoring of 3- or 1-phase voltage systems on:
- Undervoltage
- Overvoltage
- Phase sequence (at 3-phase voltage system)
Fast fault location
Preventive maintenance
Space saving

Features

According to IEC/EN 60255-1
Detection of under-/overvoltage and phase sequence in 3-phase voltage systems
Without separate auxiliary voltage
LED-Indication for operation voltage and contact position
De-energized on trip
With fixed response value for undervoltage
With fixed response value for overvoltage
Width: 17,5 mm