Phase monitor
RL 9877
Article number:
0066426
Type:
RL9877.11/61 3/N AC80-230/45-130V
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
| 1- / 3-phase: | 1, 3 |
|---|---|
| Approvals: | UL |
| Auxiliary voltage: | Without |
| Enclosure design: | Distribution board |
| Measuring range max.: | 230 V |
| Output contacts: | 1 C/O contact |
| Standard measuring range: | 3/N AC 80 - 230 V / 45 - 130 V |
| Type: | RL 9877 |
| Width: | 35 mm |
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Advantages / Customer benefits
- 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