Three-Phase Voltage Monitoring Relay · 208-480V AC SPDT DIN Rail - Finder 70.61.8.400.0000
Three-phase voltage monitoring relay for 208-480V AC systems with phase loss and phase sequence monitoring. This 70 Series unit mounts on 35 mm DIN rail and uses a 1 CO (SPDT) 6 A output for control and protection circuits in commercial and industrial panels.
What this product is for
This three-phase voltage monitoring relay is used to supervise incoming 208-480V AC three-phase supply and signal a fault when phase loss or incorrect phase sequence is detected. It is commonly installed ahead of contactor coils or control circuits to help prevent nuisance trips, reverse rotation issues, and equipment damage.
Use for
Use for motor control panels, pumps, fans, compressors, HVAC equipment, and other three-phase systems where correct phase rotation and phase presence must be confirmed before equipment starts. It is suited to DIN rail panel builds in commercial and industrial applications.
Avoid for
Avoid for applications that require adjustable voltage thresholds, asymmetry monitoring, neutral monitoring, or multifunction timing settings. This model is intended for phase loss and phase sequence monitoring rather than full programmable power quality analysis.
Best for
Best for electricians and panel builders who need a narrow 17.5 mm module for straightforward three-phase supply supervision on 35 mm DIN rail. It is a practical choice where a simple relay output is needed to enable or disable a control circuit based on line condition.
Installed in
Typically installed in control panels, MCC sections, machinery panels, rooftop unit panels, pump panels, and light industrial distribution assemblies. Typical application guidance is to switch the coil of a line contactor through the relay output so the load is disconnected when a phase fault is detected. Actual control design depends on equipment requirements and local electrical code.
Why this product exists
Three-phase equipment can be damaged or run incorrectly if a phase is lost or the rotation order is wrong. This relay provides a compact way to monitor the supply continuously and open the output contact on fault using positive safety logic.
Compared with similar products
Compared with broader multifunction monitoring relays, this model focuses on the core functions many contractors need most: phase loss and phase rotation monitoring. It also uses a slim 17.5 mm housing, making it easier to fit into crowded enclosures than wider monitoring relays.
Specifications
- Manufacturer: Finder
- Series: 70 Series
- Manufacturer part number: 70.61.8.400.0000
- Product type: Three-phase voltage monitoring relay
- Monitored system voltage: 3 x 208-480V AC
- Functions: Phase loss monitoring and phase sequence monitoring
- Output: 1 CO (SPDT)
- Output rating: 6 A at 250V AC
- Mounting: 35 mm DIN rail
- Terminal type: Screw terminals
- Housing width: 17.5 mm (0.69 in)
- Body dimensions: 89.8 x 17.5 x 60.8 mm (approximately 3.54 x 0.69 x 2.39 in)
- Switch-off delay: 0.5 s
- Power consumption: approximately 1 W
- Ingress protection: IP20
- Operating temperature: -20 to 60 degC (-4 to 140 degF)
- Mounting35 mm DIN rail
- Series70 Series
- Operating Temperature-20 to 60 degC (-4 to 140 degF)
- Ingress ProtectionIP20
- Terminal TypeScrew terminals
- Output1 CO (SPDT)
- FunctionsPhase loss monitoring and phase sequence monitoring
- Power Consumptionapproximately 1 W
- Housing Width17.5 mm (0.69 in)
- Body Dimensions89.8 x 17.5 x 60.8 mm (approximately 3.54 x 0.69 x 2.39 in)
- Output Rating6 A at 250V AC
- BrandsFinder
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