MATPH LIGHTNING SURGE PROTECTOR FOR PHOTOVOLTAIC SYSTEM BEFORE USE .... POINTS OF CAUTION

MATPH LIGHTNING SURGE PROTECTOR FOR PHOTOVOLTAIC SYSTEM BEFORE USE .... POINTS OF CAUTION
MATPH
INSTRUCTION MANUAL
LIGHTNING SURGE PROTECTOR FOR PHOTOVOLTAIC SYSTEM MODEL
(750 V DC, 1000 V DC use)
MATPH
BEFORE USE ....
POINTS OF CAUTION
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■ CONFORMITY WITH EC DIRECTIVES
•Altitude up to 2000 meters
•The equipment must be installed such that appropriate
clearance and creepage distances are maintained to conform to CE requirements. Failure to observe these requirements may invalidate the CE conformance.
■ PACKAGE INCLUDES:
Surge protector.............................................................. (1)
■ MODEL NO.
Check that model No. described on specification label
matches the operational line voltage and other specifications as shown in ‘PERFORMANCE’ below.
■ 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 (20kA @8/20µsec. waveform) caused by a direct
or almost direct hit by lightning.
The MATPH must be installed according to this installation / 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 μs)
Nominal discharge current (In): 10 kA (8/ 20 μs)
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)
■ 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 MATPH during thunder storms.
•Indoor use
•Be sure to house the MATPH inside an metal enclosure
for safety. Even though the MATPH is capable of withstanding an induced discharge current expected in normal 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 continuous 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 supply
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.
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-8160
P. 1 / 5
MATPH
FEATURES
SCHEMATIC CIRCUITRY
■ CURRENT CAPACITY
The one-port SPD can be used regardless of the load current.
■ 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 solderless
terminals for a wide range of wire sizes from 2 to 14 mm2.
L–
θ
L+
Monitor LED
Display
Circuit
θ
θ
A0
A1 NC
θ: Thermal breaker
Note: Terminals A0 & A1 are available for 'Alarm output' code 'A.'
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. Position 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.
■ 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.)
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-8160
P. 2 / 5
MATPH
CONNECTION PROCEDURE
■ INSTALLING CIRCUIT BREAKERS
This unit 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 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.
■ CONNECTION DIAGRAM
Switch Gear
Photovoltaic
Array
L+
10m min.
Common Enclosure
Distribution Board
Blocking Diode
DC
L–
L−
L+
*2, *3
L−
L+
*1
AC
*2, *3
*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 MATPH but use the
L- terminal. If also, earthing at positive line is necessary, earth the L+ terminal.
■ 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.
Switch Gear
L+
Blocking Diode
Wiring MCCB
Solar Cell
Array
Solar Cell
Array
Solar Cell
Array
L–
L+
L−
L+
L–
L+
L–
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-8160
P. 3 / 5
MATPH
WIRING
EARTHING
■ LEADWIRES
Conductor cross-section area: 5.5 mm2 minimum for both
the power and the earth lines. However, a local industrial
standard requirement for wiring should take precedence.
■ COMMON EARTHING WITH CROSS-OVER WIRE
Basically a common earthing with cross-wiring between the
MATPH and the protected device is recommended for adequate 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.
■ 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 solderless terminal, cover the terminal with a insulation cap to
prevent direct touching by a hand.
B
• Applicable Solderless Terminal Size
diameter d
+
-
d : M5 use
B ≤ 12.5 mm
F ≥ 7.0 mm
(F ≥ 8.2 mm for sharing terminals)
T ≤ 1.8 mm
Protected
Device
G
L- L+
MATPH
F
T
Cross-wiring
■ 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.
ALARM OUTPUT
Optional breack-contact relay output is available to alert
when the thermal breaker has separated the discharge element from the power supply circuit.
If the alarm output should be transmitted remotely via outdoor 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
thermal 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 (8 mm exposed)
CHECKING
■ WIRING
• Make sure that wiring is done as instructed in the connection 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.
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-8160
P. 4 / 5
MATPH
MAINTENANCE
Even lightning in remote locations could induce surges
without our knowledge. Regular checking of the surge protector is important to find degradations in early stage, before and after the storm seasons, and whenever you experience 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 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 megger (100 V DC to operational voltage). When the polarity is
opposite, change it.
■ CHECK EXTERIOR
If discoloration or deformation is observed, replace with a
new one immediately.
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENT
Unit: mm (inch)
50 (1.97)
15 (.59) 15 (.59)
5–M5 SCREW
60 (2.36)
TERMINAL COVER
L–
L+
DIN RAIL
35mm wide
1 (.04)
MONITOR LED
80 (3.15)
98 (3.86)
SPECIFICATION
[3.4 (.13)]
ALARM OUTPUT *
TERMINAL
15 (.59)
45°
(WIRE INSERTION ANGLE)
12.5 (.49)
A0 A1 NC
* Only for 'Alarm output' code 'A.'
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-8160
P. 5 / 5
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