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.
GENERALS
■FUNCTION & FEATURES
Designed for installation where AC power enters the con-
trol panel for relatively large power consuming equipment
such as large instrumentation panels, computer systems or
telemetering systems in central control rooms or operation
centers
■SPECIFICATIONS
BETWEEN LINES LINE TO GND
MH-1201
MH-2201/2203
Discharge voltage
(p-p) 190V min. 380V min. 410V min.
Max. surge voltage* 350V max. 700V max. 700V max.
Leakage current
≤1A including relay coil
current at rated voltage
≤1mA
@150V DC
(MH-1201)
@300V DC
(MH-2201/2203)
Response time ≤0.1 µsec
Discharge current 10000A (8 / 20 µsec.)
Max. load current 200A
Voltage drop ≤2V (50/60 Hz)
Rated line voltage 100V/110V/120V AC (MH-1201)
200V/220V/240V AC (MH-2201/2203)
*The maximum voltage that could pass through M-RESTER.
Protected equipment must be able to withstand this voltage
for a very short time period.
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
with a relative humidity within 30 to 90% RH in order to
ensure adequate life span and operation.
■DIELECTRIC STRENGTH TEST
• The MH starts discharging at 410V or more voltage ap-
plied across power supply terminals and metallic hous-
ing. DO NOT conduct a dielectric strength test with the
MH connected to a power source.
• For confirming insulation of the unit, conduct the dielec-
tric strength test WITH ALL WIRES REMOVED, or con-
duct an insulation resistance test (@250V DC).
■RATED CURRENT
• Be sure that the rated current of protected equipment
does not exceed the maximum load current specification
of the M-RESTER.
• Be sure to install a breaker which matches the current
rating at the power source side of the M-RESTER.
■AND ....
We recommend that you keep spare M-RESTERs so that
you can replace them when necessary.
COMPONENT IDENTIFICATION
Body
Power Pilot Lamp
Grommet with Film
Nameplate
LIGHTNING SURGE PROTECTOR FOR POWER SUPPLY USE
(200A) MODEL
MH-1201
MH-2201
MH-2203
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
EM-8181 Rev.6 P. 1 / 4
INSTRUCTION MANUAL
