What products does Hirotronix supply?

Hirotronix supplies industrial automation sensors, machine safety systems, operator controls, level measurement systems, and automation components.

Where is Hirotronix located?

Hirotronix is located in Mississauga, Ontario, Canada.

Does Hirotronix provide worldwide service?

Yes, Hirotronix supplies automation and sensor solutions worldwide.

DOLD RL 9877 – Phase monitor

Brand

DOLD

Part number

RL 9877

Order number

0066426

Phase monitor

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

Download datasheet (PDF)Ask an engineer

Price and lead time on request — add this part to your quote list and we will reply with pricing and availability.

Brand	DOLD
Housing width	35 mm
Output contacts	1 C/O contact
Approvals	UL
Enclosure design	Distribution board
Phases	1, 3
Order number	0066426

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.

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

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
Width	35 mm
Type	RL 9877

Available variants

Contact equipping	1 changeover contact
Hysteresis	– · 4 – 20 %
Measuring voltage	3/N AC 80 – 230 V · 3/N AC 80 – 230 V / 45 – 130 V · 3AC 80 – 230 V
Switching delay	0 – 30 s
Approvals and Markings	UL-listed C/US
Variant	De-energized on trip. With neutral. Voltage monitoring · De-energized on trip. Without neutral. Voltage monitoring · Detect phase failure. Indications of the missing phase via LED. Can be used with or without neutral

Tell us the variant you need in your quote request.