MVR 54 400VAC, Voltage Monitoring Relay, 3 Phase, 415VAC Over/Under Voltage Detection, 1 x CO SPDT 8 Amp Contact, Adjustable Timer Delay, Adjutsable Upper and Lower Voltage Limits
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MVR 54 400VAC, Voltage Monitoring Relay, 3 Phase, 415VAC Over/Under Voltage Detection, 1 x CO SPDT 8 Amp Contact, Adjustable Timer Delay, Adjutsable Upper and Lower Voltage Limits

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Iskra Systemi MVR 54 Series Voltage Monitoring Relay

MVR 54 Series serves to monitor voltage, phase failure and sequence in     switchboards, protection of devices in 3-phase mains

Features

 

  • Upper and lower level of monitoring voltage
  • Adjustable time delay eliminates short voltage peaks and failures in     the main
  • Supply is done from monitored voltage
  • Faulty state is indicated by red LED and by opening of output relay     contact
  • Output contact  1 x Changeover / SPDT 8 A /250 V AC1
  • In case supply voltage falls below  60 %Un (U lower level) relay off     immediately opens without delay
  • MVR 54 - supply from all phases which means that relay is functional also in case when one phase is faulty
  • Variant MVR 54N - supply  L1-N, means that relay monitors also failure of neutral wire
  • 1-MODULE, DIN rail mounting

Iskra Systemi MVR 54 Series Voltage Monitoring Relay

MVR 54 Series serves to monitor voltage, phase failure and sequence in     switchboards, protection of devices in 3-phase mains

Features

 

  • Upper and lower level of monitoring voltage
  • Adjustable time delay eliminates short voltage peaks and failures in     the main
  • Supply is done from monitored voltage
  • Faulty state is indicated by red LED and by opening of output relay     contact
  • Output contact  1 x Changeover / SPDT 8 A /250 V AC1
  • In case supply voltage falls below  60 %Un (U lower level) relay off     immediately opens without delay
  • MVR 54 - supply from all phases which means that relay is functional also in case when one phase is faulty
  • Variant MVR 54N - supply  L1-N, means that relay monitors also failure of neutral wire
  • 1-MODULE, DIN rail mounting

Technical Data

MVR 54

MVR 54N

Supply and measuring

L1, L2, L3

L1, L2, L3, N

Supply terminals

L1, L2, L3

L1, N

Supply/measured voltage

3 x 400 V / 50 Hz

3 x 400 V / 230 V /50 Hz

Level Umax

105 - 125 % Un

Level Umin

75 - 95 % Un

Burden

max. 2 VA

Hysteresis

2 %

Max. permanent overload

AC 3 x 460 V

AC 3 x 265 V

Peak overload <1ms

AC 3 x 500 V

AC 3 x 288 V

Time delay T1

max. 500 ms

Time delay T2

adjustable 0.1-10 s

Output

 

Number of contacts

1x changeover/ SPDT (AgNi / Silver Alloy)

Current rating

8 A / AC1

Breaking capacity

2500 VA / AC1, 240 W / DC

Inrush current

10 A

Switching voltage

250 V AC1 / 24 V DC

Min. breaking capacity DC

500 mW

Indication of state

red LED

Mechanical life

1 x 107

Electrical life (AC1)

1 x 105

Other information

 

Operating temperature

-20 ... +55 °C

Storage temperature

-30 ... +70 °C

Electrical strength

4 kV (supply - output)

Operating position

any

Mounting

DIN rail EN 60715

Protection degree

IP 40 from front panel / IP 10 terminals

Overvoltage cathegory

III.

Pollution degree

2

Max. cable size (mm )2

solid wire max. 2x2.5 or 1x4  ;  with sleeve max. 1x2.5 or 2x1.5

Dimensions

90 x 17,6 x 64 mm

Weight

69 g

67 g

Standards

EN 60255-6, EN 61010-1


Relay in 3-phase main monitors size of phase voltage.  It is possible to set two independent voltage levels and thus it is possible to set two independent voltage levels and monitor e.g. undervoltage and overvoltage independently. In normal state when voltage is within set levels, output relay is closed and red LED shines.

In case  voltage exceeds or falls below the set levels, output relay opens and red LED shines ( LED indicates faulty state – flashes when timing). In case supply voltage falls below 60 % Un (UOFF lower level)relay immediately opens without delay and faulty state is indicated by red LED.In case timing is in progress and faulty state is indicated, timing is immediately stopped.