TERMINAL CONNECTIONS
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
I
Surge Protector
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
SPD3
SPD3
SPD4
SPD5
*
3
*
1,
*
2
(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
*
4
Class II
Surge Protector
*
4
Class II
Surge Protector
Class I
Surge Protector
Circuit
breaker
Circuit
breaker
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. 4 / 8
