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No.7136-0661 July 2020
Please read the instructions before installing the product, as this instruction manual explains how to use the SPD
effectively and safely.
The SPD conforms to the induced lightning current test specified in class
Ⅱ
of IEC61643-11. This SPD does not
withstand direct lightning surges that exceed the value described in the specification, and it may not protect the
equipment connected. Please confirm the detailed specification, size, etc. using the brochure or data sheet.
Table 1 External view and Basic circuit diagram
External view
Basic Circuit diagram
(LSK
－
TXXXXS)
Installation circuit
Uc:275V
LSK
－
T2720S
Uc:320V
LSK
－
T3220S
Uc:385V
LSK
－
T3820S
※
Uc : Maximum Continuous Operating Voltage (MCOV)
1. Safety instruction
1) Instruction for use
a) It is exceptionally difficult to predict the energy involved with lightning since it is a natural phenomenon. In the
event of a direct lightning strike exceeding the specification or if there are multiple induced lightning currents in
a short period of time, the SPD may deteriorate, short circuit and in the worst case fail. To prevent these
problems from occurring and protect other equipment, follow instruction
①
or
②
below.
①
The SPD should be installed in a grounded metal enclosure .(Ex
：
metal distribution board)
②
If the SPD is used to protect critical equipment, install Backup Fuse at the rated current more than 125A on the
electric input side of the SPD. (Ref. Table1)
③
If there are any requests from customer, please follow them.
b) The SPD may deteriorate, short circuit or in the worst case fail due to the electrical conditions and application
environment
－
keep the following instructions to prevent this happening.
①
Do not install the SPD on circuits where it is subjected to voltages above specified MCOV.
②
Do not use the SPD above the peak value of MCOV (Uc
×√
2 V), if DC or AC voltage has incomplete wave
shapes.
③
Do not use the SPD in the circuits that are subjected to frequent current surges with a very short interval
between them.
④
Do not expose the SPD to high temperature such as direct sunshine or install adjacent to hot object.
(Application temperature :
－
40
℃
to 70
℃
)
⑤
Do not expose the SPD to adverse environmental conditions such as rain, wind, steam, dust, and salty air.
⑥
Do not expose the SPD to acid, alkali, corrosion gas, solvent, oil, dust, and salt.
⑦
Handle the SPD carefully to prevent mechanical shock (e.g. drop) or vibration, as this may cause cracking of its
plastic housing.
INSTRUCTION MANUAL
Surge protective device (SPD)
Type LSK-T Series
Rated current of Backup Fuse
＞
125A gL/gG
125A gL/gG
≦
125A gL/gG
Not necessary
71.5
90
45
49
64
L1
N
L3
PE
L2
L1
N
F1
F2
L2
L3
