User’s
Manual
1
2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
https://www.yokogawa.com/ns/ar/
You can download the latest manuals from the following website:
Thank you for purchasing the arresters.
Please read through this manual before use for correct handling.
IM 77M02D01-01EN
3rd Edition: Apr. 01, 2022(YK)
CAUTIONARY NOTES FOR SAFE USE OF
THE PRODUCT
This User’s Manual should be carefully read before installing
and operating the product. The following symbol is used on the
product and in this manual to ensure safe usage.
This symbol is displayed on the product when it is
necessary to refer to the User's Manual for information
on personal and instrument safety. This symbol is
displayed in the User's Manual to indicate precautions
to avoid danger to the operator, such as an electric
shock.
The following symbols are used only in this manual.
Draws attention to essential information for
understanding the operations and/or functions of the
product.
CAUTION
The arrester may deteriorate or break if it receives
surges. Arresters that have deteriorated below a
speci
fi
c level or are broken, may fail to meet their
protection performance level and must therefore be
replaced. When replacing such arresters, replace both
the main unit and the terminal block. It should be noted
that the arrester may fail to safeguard the equipment
under protection if it receives any surges exceeding its
tolerance limit, such as direct lightning strokes.
QR Code
The product has a QR Code pasted for e
ffi
cient plant
maintenance work and asset information management.
It enables con
fi
rming the speci
fi
cations of purchased products
and user’s manuals.
For more details, please refer to the following URL.
https://www.yokogawa.com/qr-code
* QR Code is a registered trademark of DENSO WAVE
INCORPORATED.
CHECKING PRODUCT SPECIFICATIONS
AND PACKAGE
Check that the package contains the following items:
• AR-RT: 1
• Tag number label: 1
• Terminal cover: 2
• User's Manual (this manual)
1. MOUNTING
AND
WIRING
WARNING
Wiring should be done after ensuring the break of each
cable.
1.1 Mounting
Mount the arrester referring the
fi
gure below.
Unit: mm
24
90
M4 screw
Panel
19
24.5
465
36-M4
Oval hole
8-ø5.5×10
483
441.6
73
89
99
50
76.2
24.7
16.5
Ɣ)5.3DQHO
1.2 External
Dimensions
Unit: mm
23.5
63.5
55
8.5
(3.8)
When the latch is lowered.
26.5
28.5
90
53
100
DIN rail
AR8-01
(DIN rail adapter)
Main unit-fixing
screw
100
104
106
Model AR-RT
Arrester for RTD/Potentiometer
