M-system MMAH Series User manual

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.
POINTS OF CAUTION
■ENVIRONMENT
• Indoor use
• When heavy dust or metal particles are present in the
air, install the unit inside proper housing and ventilate it.
• Do not install the unit where it is subjected to continuous
vibration. Do not apply physical impact to the unit.
• Environmental temperature must be within -5 to +55°C
(23 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■DIELECTRIC STRENGTH TEST
• The discharge element incoporated in the M-RESTER is
grounded to its housing. Therefore, DO NOT CONDUCT
A DIELECTRIC STRENGTH TEST. If you do, the ele-
ment installed across the line and ground will start dis-
charging.
■RATED CURRENT
• Be sure that the rated current of protected equipment
does not exceed the maximum load current specification
of the MRESTER.
• 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.
GENERAL
■DESCRIPTIONS
The MMAH protects electronic equipment from induced
lightning surges entering through power cables.
Even when surges exceeding the MMAH's discharge cur-
rent capacity hit it, it still protects the equipment, however,
the insulation of the discharge element may fails. In this
case the fuse is blown and the green Alarm LED turns off.
Replacing the M-RESTER is recommended because the
maximum surge voltage between lines increases up to 800V.
■SPECIFICATIONS
BETWEEN LINES LINE TO
GND
MMAH-100 MMAH-200
Discharge voltage 190V min. 400V min. 680V min.
Max. surge voltage* 350V max. 750V max. 800V max.
Leakage current ≤4mA
@150V DC
≤4mA
@300V DC
≤0.1mA
@300V DC
Response time 4 nanosec.
Discharge current 20000A (8 / 20 µsec.)
Max. load current 10A
Internal series resist. ≤0.5Ω including return
*The maximum voltage that could pass through M-RESTER.
Protected equipment must be able to withstand this voltage
for a very short time period.
COMPONENT IDENTIFICATION
U
V
G
Terminals,
Protected Equipment Side
Body
Specification
Label
Terminals,
Cable Side
Alarm Indicator LED
■FRONT PANEL CONFIGURATION
U
V
G
u
v
SURGE
SIDE
PROTECT
SIDE
ALM
LIGHTNING SURGE PROTECTOR FOR POWER SUPPLY USE
(10A; high speed/high discharge current capacity) MODEL MMAH
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-8184 Rev.1 P. 1 / 3
INSTRUCTION MANUAL

INSTALLATION
Refer to the drawings below.
■EXTERNAL DIMENSIONS unit: mm (inch)
50 (1.97)
110 (4.33)
70 (2.76)
20 (.79)65 (2.56)
77 (3.03)
85 (3.35)
8 (.31)
U
V
G
u
v
4–4 (.16) dia.
SURGE
SIDE
PROTECT
SIDE
ALM
■MOUNTING REQUIREMENTS mm (inch)
50 (1.97)
77 (3.03)
90 (3.54) min.
77 (3.03) 4–M3
SCREW
TERMINAL CONNECTIONS
Connect the unit as in the diagram below.
Be sure to cross-wire between the Ground terminal (G) and metallic housing of the protected equipment. (100Ω max.)
MMDH-24
S2
S1
P2
P1
–
+
4 – 20mA
DC
MMAH-100
MMAH-200
BREAKER
Be sure to
install
the breaker.
V
U
v
u
AC
Source
V
U
G
G
G
EQUIP-
MENT
■GROUNDING
M-RESTER PROTECTED
EQUIPMENT
G
G
CROSSOVER WIRE
GROUNDING
(100 ohms or less)
A crossover wire between M-RESTER ground and ground or metallic
housing of equipment is required for protection.
If the protected equipment has no ground terminal, ground the
M-RESTER only.
MMAH
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-8184 Rev.1 P. 2 / 3

MAINTENANCE
Check M-RESTER periodically. Many cases of lightning are
ignored, and even lightning at a far distance often causes
inductive surges.
We recommend that you check your M-RESTER about twice
a year, before and after the rainy season. Check whenever
you experience a strong lightning occurence.
Checking procedure is explained in the following:
■CHECKING
WIRING
• Make sure that wiring is done as instructed in the con-
nection diagram.
• Make sure that the Ground terminal (G) is connected to
the metallic housing of protected equipment.
• Make sure that the Ground terminal (G) is grounded to
earth.
ALARM INDICATOR LED
• Check that the power is suplied.
• When the green LED is off despite that power is sup-
plied, the discharge element may be failed. Replace the
M-RESTER.
DISCHARGE FUNCTION
Remove all wiring connected to M-RESTER and test its dis-
charge capability as follows:
• Check resistance across the following terminals (infinite
standard).
Terminals (U) – (V), (U) – (G), (V) – (G)
• Check that discharging occurs across the following termi-
nals with a 1000V DC megger. (Indicator of the megger
reaches over-scale.)
Terminals (U) – (V), (U) – (G), (V) – (G)
LEAKAGE CURRENT (between lines)
Apply supply voltage across the terminals (U) – (V) with
no load, and measure current at the terminal (U). (≤5mA
standard)
• If any of the above tests shows negative, replace the
MRESTER.
MMAH
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-8184 Rev.1 P. 3 / 3