MODEL: MAKF

MAKF SPECIFICATIONS

ES-8143 Rev.3 Page 3/5

http://www.m-system.co.jp/

POWER SYSTEM

MODEL NO.

3-phase/3-wire, 200V AC

MAKF-240x

3-phase/3-wire, 220V AC

MAKF-240x

3-phase/3-wire, 400V AC

MAKF-400x

3-phase/3-wire, 440V AC

MAKF-480x

•Three-phase/3-wire (delta connection)

MAKF

L1

L2

L3

(N)

G

Power

Source

Protected

Device

Circuit

Breaker

POWER SYSTEM

MODEL NO.

3-phase/4-wire, 200/115V AC

MAKF-240x

3-phase/4-wire, 220/127V AC

MAKF-240x

3-phase/4-wire, 380/220V AC

MAKF-400x

3-phase/4-wire, 415/240V AC

MAKF-480x

•Three-phase/4-wire (star connection, TT system)

MAKF

G

L1

L2

L3

N

Power

Source

Protected

Device

Circuit

Breaker

POWER SYSTEM

MODEL NO.

3-phase/4-wire, 200/115V AC

MAKF-120x

3-phase/4-wire, 400/230V AC

MAKF-240x

3-phase/4-wire, 480/277V AC

MAKF-280x

3-phase/4-wire, 690/400V AC

MAKF-400x

•Three-phase/4-wire (star connection, TN system)

MAKF

G

Circuit

Breaker

L1

L2

L3

PEN

Power

Source

Protected

Device

■ALARM OUTPUT

When the alarm output is to be transmitted remotely via

outdoor cables, a surge protector for the signal line is re-

quired.

Choose a circuit breaker with alarm output. Configure a

logical addition sequence so that the alarm trips when both

or either of the MAKF or the breaker alarm trips.

■CONNECTION EXAMPLES BY POWER SYSTEMS

Abnormal voltages appearing in case of a light load or a

ground loop must be within the maximum continuous op-

erational voltage when selecting the MAKF models.

For example, the IEC 60364-5-534 (Electrical installations

of building; devices for protection against overvoltages) re-

quires margins determined by the equations below:

POWER SYSTEM

3ph/4w, Y connec, TT system

Uc ≥ 1.5 × Phase Voltage

3ph/4w, Y connec, TN system

Uc ≥ 1.1 × Phase Voltage

3ph/4w, Y connec, IT system

Uc ≥ Line Voltage

POWER SYSTEM

MODEL NO.

1-phase/2-wire, 100V AC

MAKF-120x

1-phase/2-wire, 200V AC

MAKF-240x

1-phase/2-wire, 250V AC

MAKF-240x

POWER SYSTEM

MODEL NO.

1-phase/2-wire, 100V AC

MAKF-240x

1-phase/2-wire, 200V AC

MAKF-400x

1-phase/3-wire, 200/100V AC

MAKF-240x

1-phase/3-wire, 400/200V AC

MAKF-400x

MAKF

Power

Source

L

N

G

Protected

Device

Circuit

Breaker

MAKF

Power

Source

L1

N

L2

G

Protected

Device

Circuit

Breaker

•Single-phase/2-wire

(three-phase delta connection grounded in the middle of

phases) or single-phase/3-wire connection

•Single-phase/2-wire connection