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EWS / EWS2 phase sequence and loss of phase EWS Part number 84892299
Space savings, accurate measurement and optimized functions all improve the efficiency of your electrical installation.
Control: You simply install your EWS phase control relay and without any adjustment you can monitor the loss or inversion of one of
the phases.
Safety: The EWs range enables you to choose the level of safety for your installation by using versions with 1, 2 or 3 output
changeovers.
Self-powered: Simple to install, EWS control relays use the controlled mains supply for their own power supply voltage.
Part numbers
Type Output relay
EWS 1 changeover
84 892 299
Specifications
Operating range 200500VAC
Operating range 3 AC 230...440 V
Frequency 50 / 60Hz +/- 1Hz
Maximum consumption 25 VA
Output relay 1 or 2 changeovers
Type of contacts No cadmium
Nominal rating 8 A
Maximum breaking voltage 250 V AC
Max. voltage 440 V AC
Nominal breaking capacity 2000 VA
Min. breaking current 10mA / 5 V
5
Electrical life (number of operations)
AC 12: 10 at 8A/250 VAC
Maximum rate (at full load) 360 operations / hour
7
Mechanical life (operations)
2 x 10
Pick-up delay T1 200 ms
Turn-off delay T2 300 ms in the event of phase failure
2
Connection capacity - without ferrule
2 x 2,5 mm
2
1 x 4 mm
2
Connection capacity - with ferrule
2 x 1,5 mm
Max. tightening torque 1 Nm (screw M3 / IEC/EN 60947-1)
o
-20+50
Operating temperature range ( C)
0
-30+70
Storage temperature ( C)
Housing material Self-extinguishing
Protection (IEC/EN 60529) - Casing IP40
Protection (IEC/EN 60529) - Term. block IP20
Dielectric strength (IEC/EN 60255-5) 2,5 KV / 1 mn / 1mA / 50Hz
Insulation coordination (IEC/EN 60664-1) Overvoltage category III, degree of pollution 3
Weight (g) 110
Principles
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected26/02/2014 www.crouzet.com
Operating principle
EWS/EWS2 relays monitor the correct sequencing of phases L1, L2 and L3 as well as the loss of one of these phases.
When the phase sequence is correct, the output relay is energised, indicated by a yellow LED.
The relay de-energises (LED off) if one of the following faults occurs: Incorrect sequence of phases at terminals L1, L2 and L3
Total loss of one phase or all three phases (loss of phase detection threshold < 50 VAC)
o
Legend
N
Phase L1
Phase L2
Phase L3
Relay
Dimensions (mm)
EWS / EWS2
Connections
EWS
Connections
EWS
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected