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APPLICATIONS

• Direct lightning current captured by external lightning 

protection device is absorbed through the earth electrode 
to the ground.  However, depending on the grounding re-
sistance, the ground potential increases, destroying the 
insulation of low voltage electronics equipment and caus-
ing part of the direct lightning current to flow back to the 
power supply side.  To prevent such dielectric breakdown, 
install the surge protector between grounding and power 
supply of low voltage electronics equipment to save high 
potential voltage applying to the low voltage electronics 
equipment.  (For TT system, one-port SPD between neu-
tral and protective earth (model: MALN) is required.)

• Installing to the low voltage inlet, protects the electronics 

equipment around the inlet from direct lightning enter-
ing to the low voltage line.

• Installing M-System's class II surge protector (MAKF, 

MAKN, MAT2) at the distribution board 10 m or more 
away from the low voltage inlet, energy coordination is 
achieved.

FEATURES

 

CURRENT CAPACITY

• The one-port SPD can be used regardless of the load cur-

rent.

 

SAFETY AND HIGH-DENSITY MOUNTING

• Using discharge tube filled with inert gas for discharge 

element.  Sealing type, and no gas emission at operation.  
No safety clearance for fire prevention is needed.  High-
density mounting.  DIN rail mounting.

 

HIGH DISCHARGE CURRENT CAPACITY AND LONG LIFESPAN

• The MAL is designed to withstand 25 kA surges.  Low re-

sidual voltage and long lifespan design compared to class 
I varistor type surge protector.

 

PREVENTING ELECTRIC SHOCK

• The MAL’s terminal section covered with an insulation 

enclosure has IP20 protection level to protect from an 
electric shock.

• The MAL is designed for use with press-to-screw termi-

nals for a wide range of wire sizes from 8 to 35 mm

2

.

 

 ACCESSORY

• Wiring bridge (model: CNB2) for easy cross-wiring for the 

neutral line is available.

MAL

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201  Fax: +81(6)6659-8510  E-mail: [email protected]

EM-8162  Rev.1  P. 2 / 8

Summary of Contents for MAL-230x

Page 1: ...device such as a lightning rod and low voltage electronics equipment are connect ed with equipotential bonding 2 In case the low voltage wiring is possible to be hit by the direct or almost direct li...

Page 2: ...ution board 10 m or more away from the low voltage inlet energy coordination is achieved FEATURES CURRENT CAPACITY The one port SPD can be used regardless of the load cur rent SAFETY AND HIGH DENSITY...

Page 3: ...CNB2 CIRCUIT CONNECTION DIAGRAM Thermal Breaker L N PE 1 2 Discharge Element ALARM OUTPUT Terminal block provided for the alarm output option Schematic shows the operation in normal conditions INSTALL...

Page 4: ...he 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 protect...

Page 5: ...re star connection Protected device G L2 L1 L1 L2 L3 L3 N N SPD2 ACC SPD1 SPD1 Protected device SPD2 G L2 L1 L3 ACC SPD1 SPD1 POWER e g SPD1 MAL 400A Three phase 4 wire 220V AC MAL 230x SPD2 ACC CNB2...

Page 6: ...g SPD1 Three phase 4 wire 220V AC MAL 230x SPD2 MALN 230 ACC CNB2 7 ACC SPD1 SPD1 SPD1 Protected device G L1 L2 L3 ACC SPD1 SPD1 SPD1 N L1 L2 L3 1 Wiring only for three phase 4 wire Generator or trans...

Page 7: ...evice is recommended for ad equate protection Ground both the surge protector and the protected device to the same equipotentially bonding bar as following If the protected device has no ground termin...

Page 8: ...peri ence a strong lightning storm DO NOT attempt checking or replacing the surge protector during a thunder storm for safety Checking procedure is as explained below CUTTING OFF POWER SUPPLY Cut off...

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