M-system MGA-100 Instruction Manual

INSTRUCTION MANUAL
LIGHTNING SURGE PROTECTOR FOR POWER SUPPLY USE

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:
Lightning surge protector ...................................................(1)
■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ INSTALLATION / INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, and basic main-
tenance procedure.
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 cer-
tain extremely high voltages caused by a direct or almost
direct hit by lightning.
M-RESTER must be installed according to this installa-
tion / instruction manual.

GENERAL

■ FUNCTION & FEATURES
• Designed specifically for AC power supplies up to 2 amps
• 2A fuse provided to protect the power source in case of
breakdown of discharge element itself due to surges in far
excess of peak voltage
• Power indicator LED provided
• Simple installation with compact plug-in construction

■ SPECIFICATIONS

BETWEEN LINES
MGA-100
Discharge voltage (p-p) 190V min.
Max. surge voltage* 400V max.
Leakage current <2mA
@150V DC
Response time
Discharge current
Max. load current
Rated line voltage 120V AC or 170V DC (MGA-100)
250V AC or 350V DC (MGA-200)
*The maximum voltage that could pass through M-RESTER.
Protected equipment must be able to withstand this voltage
for a very short time period.
(2A; rack-mounted)
LINE TO GND
MGA-200
410V min. 410V min.
800V max. 800V max.
<2mA <1mA
@300V DC @300V DC
<0.1 μsec.
1000A (8 / 20 μsec.)
2A
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 at-
mosphere, install M-RESTER inside proper housing and
ventilate it.
• Do not install the M-RESTER where it is subjected to
continuous vibration. Do not apply physical impact to the
M-RESTER.
• Environmental temperature must be within -5 to +55°C
in order to ensure adequate life span and operation.
■ WIRING
• DO NOT perform dielectric strength tests with wires con-
nected to the unit. Otherwise the element will start discharg-
ing at discharge voltage, which can cause insulation failure.
Be sure to return the wires after the test.
■ FUSE
• Even when a strong lightning surge exceeding discharge
current capacity of lightning arrester enters to power
supply cables, the MRESTER protects the equipment to
some extent but its discharge element may fail. The fuse
will be blown in such a case, which is indicated with the
monitor LED turned OFF. We recommend that you im-
mediately replace the M-RESTER with a new one.
■ AND ....
• We recommend that you keep spare M-RESTERs so that
you can replace them when necessary.
COMPONENT IDENTIFICATION
Body
Terminal Cover
MGA-100/MGA-200
Specification Label
Monitor LED
EM-8271 Rev.4 P. 1 / 3