Fuse monitoring

Electrical values and connection

Type

MFM

EFM10

EFM15

EFM20

EFM25

3-pole

1-pole

Version

AC/DC

AC

AC

DC

AC

DC

AC/DC

AC

DC

Rated operational voltage (Ue) of 3NP11 1)

  • At 50/60 Hz AC

V

24 ... 690

230 ... 690

190 ... 690

--

110 ... 690

--

24 ... 240

230 ... 690

--

  • At DC

V

24 ... 240

--

--

220 ... 440

--

120 ... 440

24 ... 250

--

220 ... 440

Conductor cross-section, max.

mm2

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

Tightening torque

2.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

0.5 ... 1.2

1) Please note: The permissible voltage range for the main circuit of a fuse switch disconnector is restricted in versions with fuse monitoring. If the upper or lower threshold of the permissible operational voltage range for fuse monitoring is crossed, there is a risk of irreparable damage to the fuse monitoring device or fuse monitoring may malfunction.

Signaling contacts

Type

MFM

EFM10

EFM15

EFM20

EFM25

3-pole

1-pole

Version

AC/DC

AC

AC

DC

AC

DC

AC/DC

AC

DC

Type and number of signaling contacts

1 NO + 1 NC

1 CO

1 NO

1 NO

1 NO

1 NO

1 NO

2 CO 1)

2 CO 1)

Rated operational voltage Ue

  • At 50/60 Hz AC

V

230

24

24

24

24

24

24

24

24

  • At DC

V

230

24

24

24

24

24

24

24

24

Rated operational current Ie

  • At AC-15, at 24 V

A

6

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

  • At AC-15, at 230 V

A

6

--

--

--

--

--

--

--

--

  • At DC-13, at 24 V

A

2

1

1

1

1

1

1

1

1

  • At DC-13, at 230 V

A

0.5

--

--

--

--

--

--

--

--

1) One changeover contact to signal fuse failure and one changeover contact to signal line faults (overvoltage/undervoltage and phase failure).