• RS Stock No. 361-1625
  • Brand Broyce Control
  • Mfr. Part No. 45UFR 230VAC
Broyce Control
Broyce Control Frequency Monitoring Relay with DPDT Contacts, 1 Phase, 230 V ac
Product Details

45UFR Frequency Relay

This Broyce Control 45UFR electrical relay unit is designed to monitor the frequency of its own supply. The 45UFR is used for monitoring under frequency conditions, whereby the relay de-energises when the frequency drops below the adjustable trip point. The relay re-energises when the frequency increases above the trip point plus the hysteresis.

Detects Under frequency
UFR relay de-energises if frequency falls below trip level – red LED on, contacts 11, 14 /21 & 24 closed
Adjustable trip level
Adjustable hysteresis
Monitors own supply
1 x DPDT relay output 8A
LED indication for supply and relay status
DIN rail housing
Write on identification tab
Dimensions: H78 x W45 x D99mm

Broyce Monitor Relays

Relay controllers manufactured using flame retardant material to UL94 VO
Electrical life: ≥150 000 operations
Suitable for use within ambient temperature environments from -20 to +60°C (except stock no. 361-1710 and 361-1681 which are suitable from -20 to +50°C)


Output relay contact rating specified at 250Vac

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Monitoring ApplicationFrequency
Supply Voltage230 V ac
Contact ConfigurationDPDT
Electrical Phase1
Time Delay200 ms
Frequency Sensing Range40 → 60 Hz, 50 → 70 Hz
Dimensions99 x 45 x 78 mm
Minimum Operating Temperature-20°C
Maximum Frequency Sensed60 Hz, 70 Hz
Minimum Frequency Sensed40Hz
Maximum Operating Temperature+60°C
Frequency SensitivityUnderfrequency
Operating Temperature Range-20 → +60 °C
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Available to back order for despatch 26/01/2018
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Technical Reference
  • RS Components

    Statement of conformity

    The product detailed below complies with the specifications published by RS Components. Where applicable it provides assurance that electrostatic discharge sensitive devices have been handled and packed under conditions that meet the administrative and technical requirements of the ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards.
    RS Stock No. 361-1625
    Description Broyce Control Frequency Monitoring Relay with DPDT Contacts, 1 Phase, 230 V ac
    Manufacturer/Brand: Broyce Control
    Mfr. Part No. 45UFR 230VAC
    The foregoing information relates to product sold on, or after, the date shown below.
    Date Dec 18, 2017
    RS Components Ltd, Birchington Road, Corby, Northamptonshire, NN17 9RS, UK
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