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Phase monitor
RN 9877
- Article number: 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,... more
Product description
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.
Technical specifications
| 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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Advantages
- 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
Features
- 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