MG MATPH Bedienungsanleitung

EM-8160 Rev.2 P. 1 / 5

MG CO., LTD. www.mgco.jp

5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN

INSTRUCTION MANUAL

LIGHTNING SURGE PROTECTOR FOR PHOTOVOLTAIC SYSTEM

(750 V DC, 1000 V DC use) MODEL MATPH

BEFORE USE ....

Thank you for choosing us. Before use, please check con-

tents of the package you received as outlined below.

If you have any problems or questions with the product,

please contact our sales ofﬁce or representatives.

■PACKAGE INCLUDES:

Surge protector....................................................................(1)

■MODEL NO.

Check that the model No. described on the speciﬁcations

matches the operational line voltage and other speciﬁca-

tions as shown in ‘PERFORMANCE’ hereafter.

■INSTALLATION / INSTRUCTION MANUAL

This manual describes necessary points of caution when

you use this product, installation, and basic maintenance

procedure.

LIMITATION APPLICABLE TO MATPH

The MATPH will protect electronics equipment from

damage caused by induced lightning by absorbing most

of the surge voltages.

However, MATPH may not be effective against certain

extremely high voltages exceeding its discharge current

capacity (20 kA @ 8/20 µsec. waveform) caused by a di-

rect or almost direct hit by lightning.

The MATPH must be installed according to this installa-

tion / instruction manual.

PERFORMANCE

Max. continuous operating voltage (Uc, Line to line):

750 V DC for MATPH-750

1000 V DC for MATPH-1000

Discharge voltage (Line to earth): 500 V DC

Voltage protection level (Up):

• MATPH-750

Line to line: 2.5 kV (@In)

Line to earth: 1.8 kV (@In)

• MATPH-1000

Line to line: 3.3 kV (@In)

Line to earth: 2.1 kV (@In)

Maximum discharge current (Imax): 20 kA (8/ 20 μsec.)

Nominal discharge current (In): 10 kA (8/ 20 μsec.)

Response time:

Line to line: ≤ 4 nsec.

Line to earth: ≤ 20 nsec.

Leakage current: ≤ 1 mA

Insulation resistance: ≥ 100 MΩ with 500 V DC (line to

alarm output)

Dielectric strength: 2000 V AC @ 1 minute (line to alarm

output)

POINTS OF CAUTION

■CONFORMITY WITH EU DIRECTIVES

• Altitude up to 2000 meters.

• The equipment must be installed such that appropriate

clearance and creepage distances are maintained to con-

form to CE requirements. Failure to observe these re-

quirements may invalidate the CE conformance.

■INSTALLATION

• DANGER!

DO NOT install the MATPH at the point common to an

external lightning protection device such as a lightning

rod. The MATPH will be subject to the danger of direct

lightning.

• DANGER!

DO NOT perform an installation and wiring of the MAT-

PH during thunder storms.

• Indoor use.

• Be sure to house the MATPH inside an metal enclosure

for safety. Even though the MATPH is capable of with-

standing an induced discharge current expected in nor-

mal conditions, it is entirely possible to be hit by a certain

strong lightning exceeding its designed capacity. It is also

subject to a direct hit by a lightning. The MATPH will be

destroyed by such high lightning energy.

• We recommend to install the MATPH in a position where

the monitor LED is clearly visible to facilitate inspection

and maintenance.

• DO NOT install the MATPH where it is subjected to con-

tinuous vibration. Do not apply physical impact to the

MATPH.

• Environmental temperature must be within -25 to +80°C

(-13 to +176°F) and relative humidity within 30 to 90%

RH in order to ensure adequate life span and operation.

■HIGH TEMPERATURE

• DANGER!

The front parts of the surface may be hot. DO NOT grab

the sides of the module. When the MATPH’s discharge

element (zinc oxide element) gradually degrades, its

increased leakage current causes high temperature at

the surface of the MATPH, until the discharge element

is ﬁnally separated from the power line by the thermal

breaker. However, a part of the module may already be

too hot to touch safely if the module is near the end of its

life.

■DIELECTRIC STRENGTH TESTING

• Conduct the dielectric strength test with all power sup-

ply wires removed. The MATPH will start discharging at

the described discharge voltage if a test voltage is applied

with all power supply wires connected. It will result in an

insulation failure.

■AND....

• We recommend that you keep spare MATPHs so that you

can replace them quickly when necessary.

MATPH

EM-8160 Rev.2 P. 2 / 5

MG CO., LTD. www.mgco.jp

5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN

FEATURES

■CURRENT CAPACITY

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

rent.

■HIGH PERFORMANCE & RESPONSE TIME

• The discharge element (zinc oxide varistor) between the

lines does not disturb the power line with follow current

normally observed by a spark gap after a discharge. The

response time is also very high.

■HIGH DISCHARGE CURRENT CAPACITY

• The MATPH is designed to withstand 20 kA surges (test

waveform 8/20 µsec.). High design standard compared to

normally induced surge current level of 1 kA.

■THERMAL BREAKER

• The power supply voltage is continuously applied to the

incorporated discharge element (zinc oxide element).

Degraded element is automatically separated from the

power lines for safety to prevent overheating caused by

leakage current.

• The failure is notiﬁed visually by the monitor LED and

remotely by an alarm contact.

■PREVENTING ELECTRIC SHOCK

• The MATPH’s terminal section with a terminal cover has

IP20 protection level to protect from an electric shock.

• The MATPH is designed for use with ring shape solder-

less terminals for a wide range of wire sizes from 2 to 14

mm2.

■MEASUREMENT OF RESISTANCE TO EARTH

• A spark gap is employed as surge suppressor between

line and earth. That makes measurement of resistance

to earth without removing the SPD even in case switch

gears connected. (If the measurement voltage is higher

than 500 V DC, remove the SPD.)

SCHEMATIC CIRCUITRY

L+

L–

A1 NCA0

ѳѳ

Monitor LED

: Thermal breaker

Note: Terminals A0 & A1 are available for ‘Alarm output’ code ‘A.’

Display

Circuit

INSTALLATION

■DIN RAIL MOUNTING

The MATPH is mounted on a 35-mm-wide DIN rail. Set the

MATPH so that its DIN rail adaptor is at the bottom. Posi-

tion the upper hook at the rear side of base on the DIN rail

and push in the lower.

When removing, push down the DIN rail adaptor utilizing a

minus screwdriver and pull.

MATPH

EM-8160 Rev.2 P. 3 / 5

MG CO., LTD. www.mgco.jp

5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN

CONNECTION PROCEDURE

■INSTALLING CIRCUIT BREAKERS

This unit incorporates a thermal breaker which separates the discharge element from the power line upon detecting the in-

creased leakage current by the element’s gradual degradation.

However, in rare cases, when the unit is hit by an extremely strong lightning which exceeds the unit’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

■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

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–

SPDSPD

SPD

MATPH

EM-8160 Rev.2 P. 4 / 5

MG CO., LTD. www.mgco.jp

5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN

WIRING

■LEADWIRES

Conductor cross-section area: 5.5 mm2minimum for both

the power and the earth lines. However, a local industrial

standard requirement for wiring should take precedence.

■SOLDERLESS TERMINAL

Applicable ring tongue terminal without insulation sleeve

is as indicated below. Spade tongue terminal must conform

with the ring type size.

In order to ensure IP20 protection (IEC 60529) with a sol-

derless terminal, cover the terminal with a insulation cap

to prevent direct touching by a hand.

d : M5 use

B ≤ 12.5 mm

F ≥ 7.0 mm

(F ≥ 8.2 mm for sharing terminals)

T ≤ 1.8 mm

• Applicable Solderless Terminal Size

diameter d

■TORQUE

Tighten the screw terminals securely. Maximum allowable

torque is of 2.5 N·m.

■WIRE LENGTH

Keep the wire length to the minimum for both the power

source side and the earth side. The wire length between the

branch point and the earth should ideally be less than 0.5

meters. Extra long wires should not be bundled in coils, but

be cut to the minimum required length.

EARTHING

■COMMON EARTHING WITH CROSS-OVER WIRE

Basically a common earthing with cross-wiring between the

MATPH and the protected device is recommended for ad-

equate protection. Earthing resistance should be less than

100 ohms. If the protected device has no earth terminal,

earth only the MATPH.

The earthing point should be close to the MATPH side as

shown below.

Cross-wiring

Protected

Device

L+

SPD

ALARM OUTPUT

Optional breack-contact relay output is available to alert

when the thermal breaker has separated the discharge ele-

ment from the power supply circuit.

If the alarm output should be transmitted remotely via out-

door cables, a surge protector for signal line is required.

Choose a circuit breaker with an alarm output. Conﬁgure a

logical addition sequence so that the alarm trips when both

or either of the MATPH or the breaker alarm trips.

■RELAY SPECIFICATIONS

Alarm output: The breack-contact relay trips when the ther-

mal breaker operates.

Rated load: 250V AC @50mA (resistive load)

24V DC @50mA (resistive load)

■CONNECTION

Terminal: Tension clamp

Applicable wire size: 0.13 to 1.5 mm2

Stripped length: 8 mm

CHECKING

■WIRING

• Make sure that wiring is done as instructed in the con-

nection diagram.

• Make sure that the earth terminal (G) is connected to the

metallic housing of protected equipment.

• Make sure that the earth terminal (G) is earthed to earth.

MATPH

EM-8160 Rev.2 P. 5 / 5

MG CO., LTD. www.mgco.jp

5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN

MAINTENANCE

Even lightning in remote locations could induce surges

without our knowledge. Regular checking of the surge pro-

tector is important to ﬁnd degradations in early stage, be-

fore and after the storm seasons, and whenever you experi-

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:

■CHECK EXTERIOR

If discoloration or deformation is observed, replace with a

new one immediately.

■CHECK MONITOR LED

Green LED turns on during normal operation, indicating

the surge protector is functioning properly. Turning off

means that the protector is in failure. Replace with a new

one immediately.

When the voltage between L+ and L- is low, the monitor

LED may be dark. In that case, check the LED with a insu-

lation tester (100 V DC to operational voltage). When the

polarity is opposite, change it.

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENT

Unit: mm (inch)

45°

(WIRE INSERTION ANGLE)

DIN RAIL

35mm wide

[3.4 (.13)]

60 (2.36)

80 (3.15)

ALARM OUTPUT

TERMINAL

50 (1.97)

15 (.59) 15 (.59)

L–

NCA1A0

L+

5–M5 SCREW

TERMINAL COVER

SPECIFICATION

Only for 'Alarm output' code 'A.'

MONITOR LED

98 (3.86)1 (.04)

80 (3.15)

15 (.59)

12.5 (.49)

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