MODEL: MAL

MAL SPECIFICATIONS

ES-8162 Rev.2 Page 3/6

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

CONNECTION EXAMPLES

SPD1 SPD1 SPD2

ACC1

ACC2

Protected

device

Circuit

breaker

G

Circuit

breaker

Building

Service entrance switch gear

Equipotencial bonding terminal

Switchgear

Apparent

energy

meter

(WHM)

POWER (e.g.)

Three phase/3-wire

220V AC

SPD1

Class II Surge Protector

ACCESSORY

MAL-230x

SPD2

MALN-230

SPD3

MAKF-240x

SPD4

MAKN-220x

SPD5

MAT2-2404xx

ACC1

CNB2-5

ACC2

CNB-3

*1. The circuit breaker's rating current must be of 150 A, and the rated interrupting capacity selected must be the grater between 30 kA

or the highest amount of current that could be available in the circuit. For monitoring the operation of the circuit breaker we recommend

also using the alarm switch (AL).

*2. The use of RCD with time-delay overcurrent protection is recommended upon to prevent unnecessary operation with surge current

(Recommended sensitivity current rating: 30mA)

*3. Install an MCCB for backup saving of class II surge protector. Refer to the data sheets of the class II surge protector for details.

*4. If the service entrance switchgear and switchgear or protective device wiring distance is more than 10 m, install the class II surge

protector on the power supply downstream. Class II surge protector is the combination of SPD3 and SPD4 or SPD5

SPD5

(N)

L2

L1

L3

INSTALLATION EXAMPLES: Three phase/3-wire (delta connection) TT Systems

Lightning is a natural phenomenon and this unit could receive surges exceeding the discharge withstand current rating.

Then, there is a possibility of burning out and result in short-circuits because of exceeding the processing capacity.

Upon to save a backup, the circuit breaker must be installed on the power supply side of the surge protector.

Molded-case circuit breaker (MCCB) or residual current circuit breaker with overcurrent protection (RCD) can be used.

Generator or transformer

Class II

Surge Protector

Class II

Surge Protector

Class I

Surge Protector

Circuit

breaker

Circuit

breaker