Specifications are subject to change without notice 1
Current and Voltage Controls
Self-powered 3-Phase Sequence Control
Type EUH
Product Description Ordering Key
Housing
Function
Type
Output
Power supply
• 3-phase monitoring relay for phase-
sequence/total phase loss (closed circuit)
• Measures when all 3 phases have the correct
phase sequence
• Measures on own power supply
• Power supply range: 230-440 VAC (±10%)
• Output: 5 A SPDT relay
• For mounting on DIN-rail in accordance with
DIN/EN 50 022
• 22.5 mm Euronorm housing
• LED-indication for relay and power supply ON
3-phase control relay for de-
tection of incorrect phase se-
quence or total phase loss.
Supply range from 230-440
VAC covered by one multi-
voltage relay. 22.5 mm Euro-
norm housing for mounting on
DIN-rail. Frequently used to
secure the right phase se-
quence when applying a load
to a 3-phase electrical net-
work.
Type Selection
Input Specifications
Input U, V, W L1 - L2 - L3
measures on own supply
Supply Specifications
Power supply
Overvoltage cat. III (IEC 60664)
Rated operational voltage (IEC 60038)
Through term. U, V, W 230-440 VAC ±10%
@ 50 ± 5 Hz
220-440 VAC ±10-15%
@ 60 ± 5 Hz
Voltage interruption ≤40 ms
Dielectric voltage none
Rated operational power 15 VA @, 440V/50 Hz
Supplied from L1 & L3
Output Specifications
Output SPDT relay
Rated insulation voltage 250 VAC (contact/elect.)
Contact ratings (AgCdO) µ (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 106operations
Electrical life ≥105operations
(at max. load)
Operating frequency ≤7200 operations/h
Dielectric strength
Dielectric voltage 2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
General Specifications
Reaction time
OFF-delay < 190 ms
ON-delay < 375 ms
Indication for
Power supply ON LED, green
Output ON LED, yellow
Environment
Degree of protection IP 20
Pollution degree 3
Operating temperature - 2 0 ° to + 5 0 ° C ( - 4 ° to +122°F)
Storage temperature
-50° to +85°C (-58° to +185°F)
Weight 140 g
Screw terminals
Tightening torque
Max. 0.5 Nm acc. to IEC 60947
EUH C M44
Mounting Output Supply: 230-440 VAC
For DIN-rail SPDT EUH C M44
2Specifications are subject to change without notice
EUH
Mode of Operation
EUH measures on its own 3-
phased power supply. The re-
lay operates when the phase
sequence is correct.
The relay releases when the
phase sequence is incorrect
or one or more of the phases
are disconnected.
Example 1
The relay releases in case of
incorrect phase sequence or
interruption of one of the
phases caused by a blown
fuse.
Example 2
The relay is for monitoring
that the power supply has the
cor
rect phase sequence. A
blown
fuse will not be detect-
ed as the motor will partly
regenerate the lost phase.
Wiring Diagrams
Example1 Example 2
Operation Diagram
Power supply ON L1
Power supply ON L2
Power supply ON L3
Relay ON
µ
µ
