Datasheet

Multi - function phase control relay - 17.5 mm MWU Part number 84873023
Control of 3-phase networks: phase sequence, phase failure, imbalance (asymmetry), over and undervoltage
Range includes mono-function product and multi-function product
Multi -voltage from 3 x 208 to 3 x 480 V AC
Controls its own supply voltage
True RMS measurement
LED status indication
Type
Functions
Nominal voltage (V)
84873022
MWG
Phase sequence and failure
3x208→3x480VAC
84873023
MWU
Phase sequence, failure, undervoltage
3x208→3x480VAC
84873024
MWA
Phase sequence, failure and imbalance
3x208→3x480VAC
84873025
MWUA
Phase sequence, failure, imbalance, under and overvoltage in window mode
3x208→3x480VAC
Supply
Supply voltage Un
3x208→3x480VAC*
Voltage supply tolerance
-12% / +10%
Operating range
183→528VAC
AC supply voltage frequency
50 / 60 Hz ± 10%
Galvanic isolation of power supply/measurement
No
Power consumption at Un
1.8 VA in AC
Immunity from micro power cuts
10 ms
Inputs and measuring circuit
Measurement ranges
183→528VAC
Selection of phase- phase nominal voltage Un
208 - 220 - 380 - 400 - 415 - 440 - 480 V
Frequency of measured signal
50→60Hz ± 10%
Max. measuring cycle time
150 ms/True RMS measurement
Voltage threshold adjustment
2→20%ofselectedUn
(-2 to -12% across the 3 x 208 V AC range / -2 to -17% across the 3 x 220 V AC range / 2 to 10% across the 3 x 480 V AC range)
Voltage threshold hysteresis
2% of fixed Un
Asymmetry threshold hysteresis
2% of fixed Un
Asymmetry threshold adjustment
5 to 15% of selected Un
Display precision
± 3% of the displayed value
Repetition accuracy with constant parameters
± 0,5%
Measuring error with voltage drift
< 1% across the whole range
Measuring error with temperature drift
< 0,05%/ °C
Maximum regeneration (phase failure)
70%
Timing
Delay on thresold crossing
0.1 to 10 s 0 +10%
Repetition accuracy with constant parameters
± 3%
Reset time
1500 ms
Delay on pick -up
500 ms
Alarm on delay time max.
< 200 ms
Output
Type of output
1 single pole changeover relay
Type of contacts
No cadmium
Maximum breaking voltage
250 V AC/DC
Max. breaking current
5 A AC/DC
Min. breaking current
10 mA / 5 V DC
Electrical life (number of operations)
1 x 10
5
Breaking capacity (resistive)
1250 VA AC
Maximum rate
360 operations/hour at full load
Operating categories acc. to IEC/EN 60947 -5-1
AC 12, AC 13, AC 14, AC 15, DC 12, DC 13, DC 14
Mechanical life (operations)
30 x 10
6
Insulation
Nominal insulation voltage IEC/EN 60664 -1
400 V
Insulation coordination (IEC/EN 60664 -1)
Overvoltage category III: degree of pollution 3
Rated impulse withstand voltage (IEC/EN 60664 -1)
4 KV (1,2 / 50 μ s)
Dielectric strength (IEC/EN 60664 -1)
2 kV AC 50 Hz 1 min
Insulation resistance (IEC/EN 60664 -1)
> 500 M Ω / 500 V DC
General characteristics
Display power supply
Green LED
Display relay
Yellow LED - This LED flashes during the threshold delay
Casing
17,5 mm
Mounting
On 35 mm symmetrical DIN rail, IEC/EN 60715
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
13/03/2012 www.crouzet.com