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V Function diagrams

                                                     English 

a) ON-delayed over- and undervoltage monitoring,  

1 x 2 c/o contacts

b) OFF-delayed over- and undervoltage monitoring,  

1 x 2 c/o contacts

c) ON-delayed over- and undervoltage monitoring,  

2 x 1 c/o contact

d) OFF-delayed over- and undervoltage monitoring,  

2 x 1 c/o contact

e) ON-delayed phase unbalance monitoring
f)  OFF-delayed phase unbalance monitoring
g) Phase sequence and phase failure monitoring
h) Automatic phase sequence correction

  Control supply voltage / Three-phase measuring voltage

 Threshold value

 Measured value

 Threshold value

  Output relays 1 

 

Output relay 2

 

Red LED

 

 Red LED

 Yellow LED

  Start-up delay t

S

, fixed

  Tripping delay tv, adjustable 

  Start-up delay t

S1

 of R1, fixed 

  Start-up delay t

S2

 of R2, fixed

Threshold values for over- and undervoltage

EMR5-AWN280-1:

   L1-L2-L3-N  180-280 V  U

min

 = 180-220 

 

 

 

U

max

 = 240-280 V

EMR5-AWN500-1:

 L1-L2-L3 

300-500 

V  U

min

 = 300-380 

V

 

 

 

U

max

 = 420-500 V 

EMR5-AWM580-2:

 L1-L2-L3 

350-580 V  U

min

 = 350-460 

 

 

 

U

max

 = 480-580 V

EMR5-AWM720-2:

 L1-L2-L3 

450-720 V  U

min

 = 450-570 

 

 

 

U

max

 = 600-720 V

EMR5-AWM820-2:

 L1-L2-L3 

530-820 V  U

min

 = 530-660 

 

 

 

U

max

 = 690-820 V

 

Threshold values for phase unbalance

Switch-off value:    
L1-L2-L3:  2-25 % (unbalance value in percentage)

Unbalance value in percentage = 

 Max. difference_L1,L2,L3  

*

100 %

 

  Average value_L1,L2,L3

Switch-on value: 
Set switch-off value -20%

Operating principle                                                      

EMR5-AW are multifunctional monitoring relays for three-phase 
mains. They monitor all phase parameters such as phase sequence, 
phase failure, over- and undervoltage and phase unbalance. 

 

EMR5-AWN280-1 is also suitable for monitoring single-phase mains 
(see ‚Electrical connection‘).

Over- and undervoltage, 1 x 2 c/o contacts

If all three phases are present with correct voltage, the output 
relays are energized. If the voltage to be monitored exceeds or 
falls below the set threshold value, the output relays de-energize 
instantaneously or delayed (0.1-30 s), depending on the set time 
delay. The fault type is indicated by LEDs. The output relays re-

energize automatically, instantaneously or with delay (0.1-30 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 %. 

Over- and undervoltage, 2 x 1 c/o contact

If all three phases are present with correct voltage, the output re-
lays are energized. If the voltage to be monitored exceeds the set 
threshold value, output relay R1 de-energizes instantaneously or 
delayed (0.1-30 s), depending on the set time delay. If the voltage 
to be monitored falls below the set threshold value, output relay 
R2 de-energizes instantaneously or delayed (0.1-30 s), depending 
on the set time delay. The fault type is indicated by LEDs. The 
output relays re-energize automatically, instantaneously or with 
delay (0.1-30 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

If all three phases are present with correct voltage, the output 
relays are energized. If the phase unbalance of the phases to 
be monitored exceeds the set unbalance threshold value, the 
output relays de-energize instantaneously or delayed (0.1-30 
s), depending on the set time delay. The fault type is indicated 
by LEDs. The output relays re-energize, instantaneously or with 
delay (0.1-30 s), depending on the set time delay, as soon as the 

voltage returns to the tolerance range, taking into account a fixed 

hysteresis of 20 %. 

Phase sequence and phase failure

If all three phases are present with correct phase sequence, the 
output relays are energized. They de-energize immediately if a 
phase failure or a phase sequence error occurs. The fault type is 
indicated by LEDs. The output relays re-energize automatically as 
soon as the voltage returns to the tolerance range. 

Automatic phase sequence correction

Applying control supply voltage / three-phase measuring voltage 
with correct phase sequence, energizes output relay R2 when the 
fixed start-up delay t

S2

 of about 200 ms is complete. Relay R2 

remains de-energized if the phase sequence is incorrect. 
If all three phases are present with correct voltage, output relay 
R1 energizes when the fixed start-up delay t

S1

 of about 250 ms is 

complete. If the voltage to be monitored exceeds or falls below the 
set threshold values for phase unbalance, over- or undervoltage 
or if a phase failure occurs, output relay R1 de-energizes. 

  

Output relay R2 is responsive only to a false phase sequence. In 
conjunction with a reversing contactor combination, this enables 
an automatic correction of the rotation direction (see circuit 
diagram on page 10).

The operating mode ‚Automatic phase sequence correction‘ 

can be selected only when ‚Phase sequence monitoring 
activated‘ (DIP2: OFF) and ‚2 x 1 c/o contact‘ (DIP3: ON) is 
selected. 

With the operating mode ‚Automatic phase sequence 
correction‘, the phase sequence error has the lowest error 
priority for the status indication. 

Summary of Contents for EMR5-AWN500-1

Page 1: ...peuvent pas non plus tenir compte de tous les cas d application Toutes les indications ne sont donn es qu titre de description du produit et ne constituent aucunes obligations l gales Pour de plus am...

Page 2: ...produit E Fijar el producto I Montare il prodotto D Produkt entfernen GB Remove product F D montage du produit E Desmontar el producto I Rimuovere il prodotto 2CDC 252 282 F0005 2CDC 252 281 F0005 7 m...

Page 3: ...elais 1 25 26 28 Ausgangsrelais 2 EMR5 AWN280 1 eignet sich auch zur berwachung von Einphasennetzen Voraussetzungen DIP 2 ON und L1 L2 L3 gebr ckt Schwellwert f r Asymmetrie auf Maximum 25 eingestellt...

Page 4: ...dervoltage In case of other faults both output relays react synchronously I Face avant et dispositifs de commande Fran ais Indication de fonctionnement par LED R T LED jaune Indication relais et tempo...

Page 5: ...tensi n rel de salida R2 reacciona ante una subtensi n En el caso de otros fallos los dos rel s de salida reaccionan sincr nicamente I Vista frontale con gli elementi di comando Italiano LED di visual...

Page 6: ...ung den eingestellten Schwellwert so f llt Ausgangsrelais R1 je nach eingestellter Verz gerungsart unverz gert oder verz gert 0 1 30 s ab Unterschreitet die zu berwachende Spannung den eingestellten S...

Page 7: ...nbalance Hyst Unbalance Hyst Unbalance ts start up delay fixed 200 ms tv adjustable tripping delay f OFF delayed phase unbalance monitoring 25 26 25 28 L1 L2 L3 15 16 15 18 L1 L2 L3 L1 L2 L3 L1 L2 L3...

Page 8: ...nfolgekorrektur Automatic phase sequence correction Correction automatique de l ordre des phases Correcci n autom tica de la secuencia de fases Correzione automatica della sequenza fasi Die Unterbrech...

Page 9: ...are energized If the voltage to be monitored exceeds the set threshold value output relay R1 de energizes instantaneously or delayed 0 1 30 s depending on the set time delay If the voltage to be moni...

Page 10: ...rrecte les relais de sortie sont activ s Si la tension surveiller d passe la valeur de seuil ajust e le relais de sortie R1 se d sactive selon la temporisation s lectionn e sans temporisation ou avec...

Page 11: ...zada excede el valor umbral ajustado el rel de salida R1 se des energiza instant neamente o con retardo 0 1 30 s dependiendo del tiempo ajustado Si la tensi n monitorizada cae por debajo del valor umb...

Page 12: ...ottoposta a misura aumenta oltre il valore di soglia impostato il rel di uscita R1 si diseccita a seconda del modo di ritardo impostato senza o con 0 1 30 s ritardo Se la tensione sottoposta a misura...

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