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Asymmetrie (EMR4-AW.., EMR4-A..)
Bei Vorhandensein aller drei Phasen und korrekter Spannung ist
das Ausgangsrelais angezogen. Übersteigt die Asymmetrie der
zu überwachenden Phasen den eingestellten Asymmetrie-
schwellwert fällt das Ausgangsrelais beim EMR4-AW.. unverzö-
gert oder verzögert (0,1 bis 10 s), beim EMR4-A.. verzögert ab.
Die Fehlerart wird durch LED angezeigt. Das Ausgangsrelais zieht
beim EMR4-AW.. unverzögert oder verzögert (0,1 bis 10 s), beim
EMR4-A.. unverzögert an, wenn die Spannung wieder in das
Toleranzfenster zurückkehrt. Dabei ist eine festeingestellte
20 %ige Hysterese wirksam.
Phasenfolge- und Phasenausfall
werden bei allen Geräten unverzögert angezeigt und
zurückgesetzt
h
Detaillierte technische Angaben siehe Katalog
GB
Functional diagrams
a) ON-delayed over and undervoltage monitoring
b) OFF-delayed over and undervoltage monitoring
c) ON-delayed phase unbalance monitoring
d) OFF-delayed phase unbalance monitoring
e) Phase monitoring without time delay
a Supply/Monitoring voltage
b
threshold value, adjustable, EMR4-W..-1 fixed
c
d Relay
e LED
f Delay time
Fault messages
vervoltage: F1 on
Undervoltage: F2 on
Unbalance: F1 and F2 on
Phase loss: F1 on, F2 flashing
Phase sequence: F1 and F2 alternately flashing
Threshold values for over and undervoltage
Without neutral monitoring, EMR4-AW.., EMR4-W..-C/-D
L1-L2-L3
160 – 300 V
L1-L2-L3
300 – 500 V
Without neutral monitoring, EMR4-W..-1
L1-L2-L3
380 V
L1-L2-L3
400 V
With neutral monitoring, EMR4-AWN..
L1-L2-L3-N
90 – 170 V
L1-L2-L3-N
180 – 280 V
Threshold values for phase unbalance
Switch-off value: L1-L2-L3:
2 to 15 % of the average value of the phase voltage
Switch-on value: Set switch-off value -20 %
U
= 160 – 220 V
min
U
= 220 – 300 V
max
U
= 300 – 380 V
min
U
= 420 – 500 V
max
U
= 342 V
min
U
= 418 V
max
U
= 360 V
min
U
= 440 V
max
U
= 90 – 120 V
min
U
= 120 – 170 V
max
U
= 180 – 220 V
min
U
= 240 – 280 V
max
Neutral monitoring with EMR4-AW..
The EMR4-AW.. detects the interruption of the neutral in the
main to be monitored by means of phase unbalance evaluation.
Determined by the system, in case of unloaded neutral, i.e.
symmetrical load between all three phases, it may happen that
an interruption of the neutral will not be detected (l page 6).
Operating principle
The EMR4-AW.. is a multifunctional 3-phase monitor. It monitors
all phase parameters such as phase sequence, phase loss, over-
and undervoltage and phase unbalance. EMR4-A.., EMR4-W..-1
and EMR4-W..-C/-D are singlefunctional 3-phase monitors.
The EMR4-A.. monitors phase unbalance, phase sequence and
phase loss. EMR4-W..-1 and EMR4-W..-C/-D monitor overand
undervoltage, phase sequence and phase loss.
Over- and undervoltage monitoring
(EMR4-AW.., EMR4-W..-1, EMR4-W..-C/-D)
If all three phases are present with correct voltage, the output
relay is energized. If the voltage to be monitored exceeds or
falls below the set (EMR4-AW.., EMR4-W..-C/-D) or the fixed
(EMR4-W..-1) threshold value, the output relay is de-energized
undelayed or delayed (0.1 to 10 s), depending on the set time
delay. The fault type is indicated by the LED. The output relay is
re-energized automatically, instantaneously or with delay
(0.1 to1 s), depending on the set time delay, as soon as the
voltage returns to the tolerance range, taking into account a fixed
hysteresis of 5 %.
Phase unbalance (EMR4-AW.., EMR4-A..)
If all three phases are present with correct voltage, the output
relay is energized. The output relay is de-energized on the
EMR4-AW.. undelayed or delayed (0,1 to 10 s), on the EMR4-A..
delayed (0.1 to 10 s), if the phase unbalance of the phases to be
monitored exceeds the set unbalance threshold value. The fault
type is indicated by the LED. The output relay is re-energized
undelayed or delayed (0.1 to 10 s) on the EMR4-AW.. and
undelayed on the EMR4-A.., as soon as the voltage returns to the
tolerance range, taking into account a fixed hysteresis of 20 %.
Phase sequence and phase loss
On all devices phase sequence and phase loss are indicated and
reset without time delay.
h
For further technical information, see our catalog.
F
Diagrammes de fonctionnement
a) Temporisation à la fermeture de la surveillance sous
et surtension
b) Temporisation à l'ouverture de la surveillance sous et surtension
c) Temporisation à la fermeture de la surveillance asymétrie
des phases
d) Temporisation à l'ouverture de la surveillance asymétrie
des phases
e) Surveillance sans temporisation
a Tension d'alimentation et à surveiller
b
Valeur de seuil ajustable, EMR4-W..-1 fixe
c
d Relais
e Led
f Temps de temporisation
Messages de défaut
Surtension : F1 on
Sous-tensions : F2 on
Asymétrie : F1 et F2 on
Perte de phase : F1 on, F2 clignotant
Séquence de phase : F1 et F2 clignotant alternativement
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