Specifications are subject to change without notice (10.01.00)
1
3-phase monitoring relay for phase
sequence/phase loss (closed circuit)
Measures when all 3 phases are present and have
the correct phase sequence
Measures on own power supply
Knob-adjustable level setting
Output: Up to 3 x 5 A SPDT relay
For mounting on DIN-rail in accordance with
DIN/EN 50 022
45 mm Euronorm housing
LED-indication for relay and power supply ON
Product Description
Ordering Key
Housing
Function
Type
Output
Power supply
3-phase line voltage monitor-
ing and phase sequence/
phase loss relay. Adjustment
on built-in potentiometer of
monitored voltage within
15% of rated operational
voltage. For mounting on DIN-
rail. Frequently used to se-
cure the right phase sequence
when applying a load to a 3-
phase electrical network.
EUA C 400
Type Selection
Mounting
Output
Supply: 220 VAC
Supply: 400 VAC
Supply: 480 VAC
Supply: 600 VAC
For DIN-rail
1 SPDT
EUA C 220
EUA C 400
EUA C 480
EUA C 600
2 SPDT
EUA D 220
EUA D 400
EUA D 480
EUA D 600
3 SPDT
EUA T 220
EUA T 400
EUA T 480
Input Specifications
Input U, V, W
L1 - L2 - L3
measures on own supply
Measuring ranges
220
187-253 VAC
400
340-460 VAC
480
408-552 VAC
600
510-690 VAC
ON-level
70% of voltage setting
Voltage setting
15% (of rated operational
voltage)
Supply Specifications
Power supply
Overvoltage cat. III (IEC 60664)
Rated operational voltage
(IEC 60038)
Through term. U, V, W 220
220 VAC, 15%
50/60 Hz, -5/+5 Hz
400
400 VAC, 15%
50/60 Hz, -5/+5 Hz
480
480 VAC, 15%
50/60 Hz, -5/+5 Hz
600
600 VAC, 15%
50/60 Hz, -5/+5 Hz
Voltage interruption
40 ms
Dielectric voltage
None
Rated impulse withstand
voltage
up to 480 VAC
4 kV (1.2/50 s)
up to 600 VAC
6 kV (1.2/50 s)
Rated operational power
2.5 VA
Supplied from
L1 & L3
Output Specifications
Output
1, 2 or 3 x SPDT relay
Rated insulation voltage
250 VAC (contact/elect.)
Contact ratings (AgCdO)
(micro gap)
Resistive loads
AC 1
5 A, 250 VAC
DC 1
5 A, 24 VDC
Small inductive loads AC 15
2 A, 250 VAC
DC 13
3 A, 24 VDC
Mechanical life
40 x 10
6
operations
Electrical life
10
5
operations
(at max. load)
Operating frequency
7200 operations/h
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 s)
Type EUA
3-Phase Sequence and Phase Loss
Current and Voltage Controls
2
Specifications are subject to change without notice (10.01.00)
EUA
General Specifications
Reaction time
OFF-delay
< 30 ms
ON-delay
< 500 ms
Accuracy
10%
Temperature drift
0.2%/C (
0.11%/F)
Hysteresis
< 10%
Indication for
Power supply ON
LED, green
Output ON
LED, yellow
Environment
Degree of protection
IP 20
Pollution degree
3
Operating temperature
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
Weight
280 g
Screw terminals
Tightening torque
Max. 0.5 Nm acc. to IEC 60947
Approvals
UL, CSA
CE-marking
Yes
Mode of Operation
EUA measures on its own 3-
phased power supply, and the
relay operates when all phases
are present and the phase se-
quence is correct.
The level of the monitored
voltage is adjustable on the
front of the module within
15%. The relay releases when
one or more of the phases
drops below 70% of the set
level. (Ex. if the voltage regen-
erated by electric motors ex-
ceeds the 70% level, the set
level can be adjusted until the
relay releases).
Example 1
The relay monitors that the
power supply has the correct
phase sequence and that all
phase voltages are present.
Example 2
The relay releases in case of
interruption of one of the
phases, provided that the re-
generated voltage does not
exceed the 70% level (see
above).
Potentiometer for setting of
measuring range (line voltage).
Range Setting
Wiring Diagrams
Example1 Example
2
M
V
~
11
12
14
U
W
L3
L1
m < 3
L3
L2
L1
EUA C...
EUA D...
EUA T...
21
22
24
31
32
34
EUA D...
EUA T...
EUA T...
V
~
11
12
14
U
W
L3
L1
m < 3
L3
L2
L1
21
22
24
31
32
34
EUA C...
EUA D...
EUA T...
EUA D...
EUA T...
EUA T...
Operation Diagram
Power supply ON L1
Power supply ON L2
Power supply ON L3
Relay ON
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