Phase monitor RN 9877

Numero Ordine: 0066425
Type: RN9877.11/61 3/N AC175-525/100-300V

The measuring relays RN 9877 and RL 9877 of the VARIMETER series monitor overvoltage,... altro

Descrizione del prodotto

The measuring relays RN 9877 and RL 9877 of the VARIMETER series monitor overvoltage, undervoltage, voltage range, phase asymmetry and phase sequence in 3-phase or single-phase systems. The measurement is very simple and without extensive wiring as there is no auxiliary power supply necessary. The monitoring functions are easily selectable using a single turn switch without complex menu structure. The early detection of up-coming break downs and preventive maintenance avoid expensive damages. As user you profit from the reliability and availability of your plant.

Specifiche tecniche

Width:	52,5 mm
1- / 3-phase:	1, 3
Standard measuring range:	3/N AC 175 - 525 V / 100 - 300 V
Measuring range max.:	525 V
Auxiliary voltage:	Without
Output contacts:	1 C/O contact
Approvals:	UL
Enclosure design:	Distribution board
Type:	RN 9877

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Vorteile / Kundennutzen

Preventive maintenance
For better productivity
Always right directions of motors and pumps
Safe monitoring of motors and plants with phase failure detection
High repeat accuracy
Wide measuring voltage range
Selectable monitoring function
Easy setting

Merkmale

According to IEC/EN 60255-1
For monitoring of AC 3- and single-phase with 50 /60 Hz
Detection of
- Overvoltage
- Undervoltage
- Voltage range excess
- Phase failure
- Phase asymmetry
- Missing neutral e.g. broken neutral wire
- And phase sequence in 3-phase systems
With or without neutral
Without separately auxiliary voltage (internal supply from all 3 phases)
Output: 1 changeover contact
De-energized on trip
Adjustable hysteresis for reset
Adjustable switching delay
Fast fault detection
Width:
- RL 9877: 35 mm
- RN 9877: 52.5 mm