MPN

Finder Voltage Monitoring Relay, 3 Phase, SPDT, 300 → 480V ac

RS Stock No.:: 789-2742
Mfr. Part No.:: 70.31.8.400.2022
Brand:: Finder

Finder Voltage Monitoring Relay, 3 Phase, SPDT, 300 → 480V ac

Bulk discount available

Subtotal (1 unit)*

£111.84

(exc. VAT)

£134.21

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

1 unit(s) ready to ship
Plus 1 unit(s) ready to ship from another location
Plus 22 unit(s) shipping from 11 September 2025

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Units	Per unit
1 - 4	£111.84
5 +	£107.28

*price indicative

RS Stock No.:: 789-2742
Mfr. Part No.:: 70.31.8.400.2022
Brand:: Finder

Finder Series 70 Monitoring Relay, 300 to 480V AC Voltage Sensing Range, 6A Current - 70.31.8.400.2022

This monitoring relay is an advanced voltage sensing device designed for 3-phase systems. Compactly built with dimensions of 60.8 x 35 x 88.8mm, it effectively safeguards electrical installations by monitoring voltage levels and providing crucial protection against both overvoltage and undervoltage conditions.

Features & Benefits

• Accommodates a voltage sensing range from 300 to 480V AC
• Offers overvoltage and undervoltage protection for enhanced safety
• Capable of detecting phase loss and phase sequence issues
• Features a time delay adjustment of 0.5 to 60 seconds
• Equipped with coloured LEDs for clear visual fault indication
• Compact design with modular housing for easy mounting

Applications

• Ideal for wood-processing machines requiring voltage regulation
• Utilised in hoists and cranes for safe operation
• Suitable for control panels associated with pumps
• Effective for monitoring escalators and forced-air ventilators
• Employed in air conditioning systems to prevent voltage irregularities

What is the maximum operating temperature for this relay?

The maximum operating temperature for the relay is +60 °C, ensuring reliable performance even in demanding environments.

How does the phase loss detection feature work?

The phase loss detection immediately turns off the output relay when a phase is lost, ensuring protection of connected equipment, and restores the relay as soon as the phase is active again.

What adjustments can be made to enhance its functionality?

The relay allows users to easily adjust settings for voltage detection levels and delay times using a front-facing selector and trimmers, providing tailored operation.

Is this device suitable for single-phase applications as well?

This relay is specifically designed for three-phase applications and is not intended for single-phase use, optimising its performance in complex electrical systems.

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Finder
	Monitoring Application	Voltage
	Electrical Phase	3
	Voltage Sensing Range	300 → 480V ac
	Contact Configuration	SPDT
	Voltage Sensitivity	Overvoltage Protection, Undervoltage Protection
	Phase Sensitivity	Phase Loss, Phase Sequence
	Time Delay	0.5 → 60s
	Frequency Sensing Range	50 → 60Hz
	Series	70
	Current Range	6A
	Dimensions	60.8 x 35 x 88.8mm
	Minimum Operating Temperature	-20°C
	Length	88.8mm
	Operating Temperature Range	+60°C
	Maximum Voltage Sensed	480V ac
	Width	35mm
	Maximum Operating Temperature	+60°C
	Height	60.8mm

	Select all
	Brand Finder
	Monitoring Application Voltage
	Electrical Phase 3
	Voltage Sensing Range 300 → 480V ac
	Contact Configuration SPDT
	Voltage Sensitivity Overvoltage Protection, Undervoltage Protection
	Phase Sensitivity Phase Loss, Phase Sequence
	Time Delay 0.5 → 60s
	Frequency Sensing Range 50 → 60Hz
	Series 70
	Current Range 6A
	Dimensions 60.8 x 35 x 88.8mm
	Minimum Operating Temperature -20°C
	Length 88.8mm
	Operating Temperature Range +60°C
	Maximum Voltage Sensed 480V ac
	Width 35mm
	Maximum Operating Temperature +60°C
	Height 60.8mm

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