MG MAX - User Manual

EM-8175 Rev.7 P. 1 / 4
MAX
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
LIGHTNING SURGE PROTECTOR FOR POWER SUPPLY USE
(5A; high discharge current capacity)
MODEL
MAX
INSTRUCTION MANUAL
BEFORE USE ....
Thank you for choosing us. 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 our sales office or representatives.
■ PACKAGE INCLUDES:
Lightning surge protector
(body + base socket + surge absorber element) ............... (1)
■ 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 direct
hit by lightning.
M-Rester must be installed according to this installation /
instruction manual.
GENERAL
■ FUNCTION & FEATURES
• Designed specifically for AC power supplies up to 5 amps
• Discharge current capacity 10000 A
• Absorbs surges only without affecting instrumentation signal
• No power supply interruption even when the surge absorber
is broken
• Relay contact turns ON with surge absorber failure
• Surge absorber element replaceable without power interruption
■ SPECIFICATIONS
BETWEEN LINES LINE TO
GND
MAX-100 MAX-200
Discharge voltage (p-p) 190 V min. 410 V min. 640 V min.
Max. surge voltage* 350 V max. 700 V max. 800 V max.
Leakage current ≤ 1 mA
@150V DC
≤ 1 mA
@300V DC
≤ 1 mA
@300 V DC
Response time ≤0.01 µsec.
Discharge current 10000 A (8 / 20 µsec.)
Max. load current 5 A
Internal series resist. ≤ 0.5 Ω including return
*The maximum voltage that could pass through M-RESTER. Pro-
tected equipment must be able to withstand this voltage for a very
short time period.
POINTS OF CAUTION
■ ENVIRONMENT
• Indoor use.
• When heavy dust or metal particles are present in the atmos-
phere, install M-RESTER inside proper housing and ventilate it.
• Do not install the M-RESTER where it is subjected to continu-
ous vibration. Do not apply physical impact to the M-RESTER.
• Environmental temperature must be within -10 to +55°C (14
to 131°F) with relative humidity within 30 to 90% RH in order
to ensure adequate life span and operation.
■ WIRING
• Remove cables connected to the ground terminals (2 or 7) from
the base socket before insulation test. Otherwise the element
will start discharging at discharge voltage, which can cause
insulation failure. Be sure to return the cables as they were
after the testing is complete.
■ 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.
COMPONENT IDENTIFICATION
MAX
Model No. Label
for Surge Absorber Element
Body Base Socket
Specification
Label
Surge Absorber
Failure Indicator Hole
Surge Absorber Element
(model: MEL)
■ FRONT PANEL CONFIGURATION
Model No. Label
for Surge Absorber
Element
Surge Absorber
Failure Indicator Hole
Surge Absorber
Element
Model suffix code of the surge absorber element (model: MEL)
changes according to the line voltage. Use correct model and
suffix code when ordering.

Summary

Before Use

Package Includes

Lists the items included in the product package.

Model Number Confirmation

Verifies the model number on the product matches the ordered one.

Instruction Manual Guidance

Outlines the manual's content on cautions, installation, and maintenance.

M-RESTER Limitations

Explains the surge protection limits and installation requirements for the M-RESTER.

Points of Caution

Environmental Considerations

Details suitable installation environments, temperature, and humidity.

Wiring Precautions

Advises on wiring procedures during insulation testing to prevent failure.

Rated Current Compliance

Emphasizes matching equipment current to M-RESTER specs and using a breaker.

General Function and Features

Product Capabilities

Describes features like AC power support, discharge capacity, and failure indicators.

Installation

DIN Rail Mounting Procedure

Step-by-step guide for attaching the base socket to a DIN rail.

Grounding Requirements

Explains the necessity of a crossover wire for proper grounding.

Terminal Connections

Unit Wiring and Grounding

Illustrates terminal connections and emphasizes grounding the unit.

Surge Absorber Element (MEL)

Element Function and Failure Indication

Describes the MEL's role in surge protection and failure signaling.

MEL Replacement Procedure

Guides on how to easily replace the surge absorber element (MEL).

Maintenance and Checking

Wiring and Grounding Verification

Ensures the M-RESTER is wired and grounded correctly as per instructions.

Alarm Contact and Indicator Check

Describes how to check the alarm status and front panel indicator.

Discharge Function Testing

Details how to test the unit's discharge capability using a megger.

Leakage Current Measurement

Provides steps to measure leakage current across specified terminals.

MG MAX Specifications

General

Outlets	6
USB Ports	2
Cord Length	6 feet
Type	Surge Protector
Warranty	Lifetime