RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail

RS PRO 3-Phase Under/Overvoltage Relay with Phase Sequence

The RS PRO 3-Phase monitoring relay is used for connecting to a 3-wire or 4-wire supply. The relay is designed to monitor its own supply and in conjunction with an external contactor, disconnect the supply to the load/equipment in the event of a fault occurring.

How does it work?

For the output relay to energise, all phases (and neutral – if applicable) must be present, phase sequence correct, and measured phase asymmetry/unbalance within the set limits. If any of these conditions are not met, the relay (+ contactor) will de-energise, disconnect the supply, and thus protect the equipment.

Features and Benefits

• Monitoring relay


• Compact 17.5mm DIN rail housing


• Microprocessor based


• True R.M.S. monitoring measuring phase to phase (3-wire) or phase to neutral (4-wire) voltages


• Selectable nominal voltages to suit most popular 3-wire or 4-wire supply voltages


• Monitors own supply and detects if one or more phases exceed the set Under or Over voltage trip levels


• Detects incorrect phase sequence, phase loss and neutral loss1


• Adjustments for Under and Over voltage trip levels and Time delay


• DPDT relay output 5A


• Green LED indication for supply status and Red LED for relay status

Electrical Specification

• Input: L1, L2, L3, N


• Supply/monitoring voltage Un: There are 6 nominal voltages to choose from on this product


• 3-wire monitoring: 380, 400, 415V AC


• 4-wire monitoring: 220, 230, 240V AC


• Frequency range: 48 – 63Hz


• Supply variation: 243- 540V AC (L>L)


• Overvoltage category: III (IEC 60664)


• Rated impulse withstand voltage: 4kV (1.2/50 μS)


• Power consumption (max.): 2.5VA


• Output: 15, 16, 18 / 25, 26, 28


• Relay configuration: DPDT Output rating: AC1 – 250V 5A, AC15 – 250V 2A, DC1 – 25V 5A


• Electrical life: ≥ 150,000 ops at rated load


• Dielectric voltage: 2kV AC (rms) IEC 60947-1


• Rated impulse withstand voltage: 4kV (1.2/50μS) IEC 60664

Dimensions

• Width:17.5 mm x Height: 89 mm x Depth: 66.5 mm

Note

Full specification and setup details can be found on the RS PRO datasheet.

Approvals

• Declarations: CE, RoHS, and C-tick compliant


• Standards Met EMC: Immunity EN 61000-6-2, Emissions: EN 61000-6-4

RS PRO Datasheet