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Thank you very much for purchasing our Mitsubishi Materials LITOL Line Surge Protector. Please refer to these explanations
before installing and using it
１． We developed the LITOL Line Surge Protection Device (SPD) to effectively protect all types of electronic equipment
and machinery from induced surge voltages from lightning and from electrical noise. A typical application for it is a control
or switchboard for a building and it is compliant with IEC 616443-11:2011 standard (Class 2) lightning tests
２．Line up：
Maximum
Nominal
Continuous
Part#
discharge
operating voltage
current I
n
U
c
AC150V
10kA
LTM-125RF
Single-phase 3
(8/20μs)
wires
AC275V
10kA
LTM-250RF
Three-phase 3 wires
(8/20μs)
AC510V
10kA
LTM-400RF
Three-phase 4 wires
(8/20μs)
AC150V
10kA
LTM-125R
Single-phase 3
(8/20μs)
wires
AC275V
10kA
LTM-250R
Three-phase 3 wires
(8/20μs)
AC510V
10kA
LTM-400R
Three-phase 4 wires
(8/20μs)
３．Accessories:
•LITOL instructions (this document)
2
•4(LTM-400R/RF has 5) x 1.2m long 2mm
insulated wires, terminated with φ4mm ring tongue on one side, φ8mm ring on the
other.
Main unit weight(excludes wiring): LTM-125R/250R≈700g, LTM-125RF/250RF≈730g, LTM-400R≈750g, LTM-400RF≈780g
４．Operating Condition
Operating Conditions are -25℃ to 85℃, indoor conditions or a location where water will not ingress.
５. Precautions for use:
① Grounding to Earth needs to be class D or above. Connect lead securely to terminal and follow good connection guidelines.
② Connect device with included wire. If you use other wire, make sure the wire is larger than 2.0 - 5.0mm
③ Affix device and wiring securely to protect it from damage.
④ This SPD isn't waterproof. Its location should protect it from high temperatures or humidity, direct sunlight, dust,
or corrosive gas.
⑤
This protects from induced surges from power lines but doesn't protect surges on communication lines. It is possible
for there to be a surge so large it enters past the protector and it cannot 100% protect, so damage to devices connected
to it as well as the operation of devices which can harm human life or cause other damage to intellectual property
or data are not covered.
⑥
Remove from circuity if performing a Megger test.
MITSUBISHI MATERIALS CORPRATION
Model LTM-125RF LTM-250RF LTM-400RF
LITOL
LTM-125R
LTM-250R
Maximum
Voltage protection level
discharge
U
p
current I
max
Line - Line
1.2kV
20kA
(8/20μs)
Line – Earth
1.5kV
Line – Line
1.5kV
20kA
(8/20μs)
Line – Earth
1.5kV
Line – Line
2.5kV
20kA
(8/20μs)
Line – Earth
2.5kV
Line - Line
1.2kV
20kA
(8/20μs)
Line – Earth
1.5kV
Line – Line
1.5kV
20kA
(8/20μs)
Line – Earth
1.5kV
Line – Line
2.5kV
20kA
(8/20μs)
Line – Earth
2.5kV
Ver.1.0
６．Wiring
Single-phase three wire
LTM-125R,LTM-125RF
LTM-125R
LTM-400R
R N T E
R S T E
Switchboard
漏電遮断器
R
N
T
E
Less than 100Ω
D 種接地以上（ 100Ω 以下）
Three-phase four wire
LTM-400R,LTM-400RF
Operating
LTM-400R
Indicator
R S T N PE
Switchboard
漏電遮断器
Yes
R
S
T
Yes
N
PE
Yes
Less than 100Ω
D 種接地以上（ 100Ω 以下）
７.Dimensions
－
－
－
90
102
φ 4.5
８．Maintenance and Inspection
You should only check the indicator light with the power
connected. Everything else needs to be checked with power cut
to it.
For the LTM-RF series, confirm the LED is lit as right with the power on. If the LED isn't lit, replace the unit immediately.
Make sure the ground is less than 100Ω.
９．Warrantee
2
.
If there are any manufacturing defects in our SPD we will repair or replace it with equivalent for 1 year from the date
of purchase.
This will not prevent damage from a DIRECT lightning strike to it. If a lightning strike exceeding its rating hits it, it
may not be able to protect itself or other electronic devices downstream from it.
Electronic Materials Business Company, Electronic Device Division Sales Department;
1-6-1 Yokoami Sumida-ku, Tokyo (International Fashion Center Building 8F), 130-0015 Tokyo
TEL: +81-3-5819-7322 FAX: +81-3-5819-7323
Nagoya Sales Office; 2-4-3 Nishiki Nakaku-ku Nagoya-shi, Aichi Prefecture 460-0003 (Nishiki Park Building 14F)
TEL: +81-52-223-4508 FAX: +81-52-223-4522
Osaka Branch; 1-8-30 Tenmabashi Kita-ku Osaka-shi Osaka Prefecture 530-6028 (OAP Tower 28F)
TEL：+81-6-6355-5004 FAX：+81-6-6355-5032
URL.http://www.mmc.co.jp/adv/dev E-mail.devsales@mmc.co.jp
Single-phase
Three-phase three wire
LTM-125R,LTM-125RF
LTM-125R
R S T E
R N T E
Device
Device
被保護機器
Switchboard
漏電遮断器
被保護機器
R
N
E
Less than 100Ω
D 種接地以上（ 100Ω 以下）
Use a dedicated secondary breaker and turn off for new installation or for
※
replacing this unit.
【How to connect】
Check to assure no power is running by turning off the associated
①
circuit breaker and/or testing the wires for electricity. You may
Device
被保護機器
get a dangerous shock if you do not do this.
Connect to the secondary side of earth leakage circuit breaker；
②
ELB, or the secondary side of an unused breaker. In the former
case, the Megger test will be achieved easier with a breaker
installed between LTM series and ELB.
Connect the included wires to the main unit.
③
Remove the cover over the terminals on the unit and connect the
④
colored wires to the correct terminals. Replace the cover
⑤
Attach the unit to a secure location with 4 screws.
Attach the insulated wires to the secondary side of the earth
⑥
Unit:mm
leakage breaker or the secondary side of the unused branch
breaker.
Turn on the earth leakage breaker and the breaker.
⑦
110
120
Single Phase
Off
On
LTM-RF Series LED Indication meaning
LTM-250R,LTM-250RF
LTM-250R
R S T E
R S T E
Device
Switchboard
漏電遮断器
被保護機器
R
S
T
E
D 種接地以上（ 100Ω 以下）
Less than 100Ω
Single or Three-Phase 3 wire
or Three-Phase 4 wire
Currently
Currently
protecting.
protecting.
If off, replace
If off, replace
On
On
immediately
immediately
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