INSTRUCTION MANUAL
LIGHTNING SURGE PROTECTOR FOR
PHOTOVOLTAIC SYSTEM, INSTRUMENT SHELTER
BEFORE USE ....
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.
■ PACKAGE INCLUDES:
Surge protector ............................................................. (1)
DIN rail mounting adaptor* ........................................ (1)
Screws for mounting (M4 × 8)* .................................... (2)
*Included with option code /A33
■ MODEL NO.
Confirm that the model number described on the product is
exactly what you ordered.
■ INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
LIMITATION APPLICABLE TO M-RESTER
The M-Rester will protect electronics equipment from
damage caused by lightning by absorbing most of the
surge voltages.
However, M-Rester may not be effective against certain
extremely high voltages caused by a direct or almost di-
rect hit by lightning.
M-Rester must be installed according to this installation
/ instruction manual.
GENERAL
■ FUNCTION & FEATURES
• Designed for AC and specifically for DC power supplies up
to 1 amp.
• Beneficial for protecting instruments from counter elec-
tromotive force by inductors and of course normal light-
ning surges entering from power supply lines.
• 1A fuse incorporated in element circuit.
■ SPECIFICATIONS
Max. line voltage (Uc)
Discharge voltage
Voltage protection level (Up)
Leakage current
Response time
Max. discharge current (Imax)
Nominal current (I
)
N
Internal series resistance
Dielectric strength of the
base module
LINE TO LINE
LINE TO EARTH
250V AC
----
350V DC
410V min
410V min
800V max
800V max
≤0.15mA
≤0.15mA
@300V DC
@300V DC
≤0.1 microsecond
1000A (8 / 20 µs)
1.0A
≤0.4Ω including return
1500V AC @1 minute
(G terminal to other terminals)
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
MODEL
POINTS OF CAUTION
■ ENVIRONMENT
• When heavy dust or metal particles are present in the air,
install the surge protector inside proper housing with suf-
ficient ventilation.
• Do not install the surge protector where it is subjected to
continuous vibration. Do not subject the unit to physical
impact.
• Environmental temperature must be within -20 to +80°C
(-4 to 176°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■ DIELECTRIC STRENGTH TEST
• Loosen the screw located at the left-center of the element
and remove the element module from the base before
conducting a dielectric strength testing. Otherwise the
element will start discharging at a voltage exceeding the
max. continuous operating voltage (Uc), which can cause
insulation failure of the module.
Be sure to return the element and fasten securely after
the test.
■ AND ....
• We recommend that you keep spare surge protectors so
that you can replace them when necessary.
• Lightning surge can enter not only through signal lines
but also through power supply lines. We recommend that
you also use the surge protectors for power line for suf-
ficient protection.
COMPONENT IDENTIFICATION
Head Element
Specifications
Head Element is secured to Base
with screw when the surge protector
is shipped from Factory.
MDP-200T
MDP-200T
Base
Ground Terminal (G)
(used as mounting bracket)
EM-8227
P. 1 / 3
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