MATP
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-8150 Rev.4 P. 3 / 5
CONNECTION PROCEDURE
■
INSTALLING CIRCUIT BREAKERS
The MATP incorporates a thermal breaker which separates the discharge element from the power line upon detecting the
increased leakage current by the element’s gradual degradation.
However, in rare cases, when the MATP is hit by an extremely strong lightning which exceeds the MATP’s designed induced
surge capacity, the discharge element may be burned out and short-circuited at a burst without the thermal breaker being
able to separate it safely from the line.
Install a circuit breaker at the power source side of the surge protector as a backup protection. The example below shows a
photovoltaic system. Molded-case circuit breakers (MCCB), residual current circuit breaker (RCCB) or current-limiting fuses
(slow-blow type only) can be used.
Blocking Diode
Distribution Board
Blocking Diode
10m min.
L+
L−
Photovoltaic
Array
DC
AC
■
CONNECTION DIAGRAM
■
CIRCUIT BREAKER POSITION
If you want to use circuit breaker as SPD maintenance switch, insert a wiring MCCB for DC on SPD power side (diagram below).
Even when the output current of solar cell array is low, use 20 AT or more for wiring MCCB.
*
2,
*
3
L+
L−
*
2,
*
3
*
1
L+
L
–
L+
L−
Wiring MCCB
*
1. When the wiring distance is longer than 10 m between the power conditioner and the surge protector in the switch gear, install near the power
conditioner.
*
2. Cable length between the branch point and the earthing: 0.5 m or less recommended
*
3. When the solar panel manufacturer requires earthing at negative line of DC side, do NOT use the earth terminal of the SPD but use the
L- terminal. If also, earthing at positive line is necessary, earth the L+ terminal.
Solar Cell
Array
Solar Cell
Array
Solar Cell
Array
Switch Gear
Common Enclosure
Switch Gear
L+
L
–
L+
L
–
L+
L
–
SPD
SPD
SPD
