Page 74 - Surge-Protection-E_0.pdf

Surge Arresters – Type 2

DEHNguard modular for North America
• Prewired complete unit consisting of a base part and plug-in protection modules
• No need for additional overcurrent protection devices
• Short circuit current rating (SCCR) 200 kA
• ANSI/UL 1449 – 4 Ed. Open-Type 1 SPD
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• High discharge capacity due to heavy-duty zinc oxide varistors (Imax 50 kA 8x20 μs)
• High reliability due to "Thermo Dynamic Control" SPD monitoring device

DEHNguard SU 1P …: Modular single-pole surge arrester for application in Single Phase electrical systems
DEHNguard MU SP …: Modular surge arrester for application in Split Phase systems
DEHNguard MU SPN …: Modular surge arrester for application in Split Phase systems (with N protected)
DEHNguard MU CGD …: Modular surge arrester for application in Corner Grounded Delta systems
DEHNguard MU 3PY …: Modular surge arrester for application in 3 Phase Wye electrical systems
DEHNguard MU 3PD …: Modular surge arrester for application in 3 Phase Delta electrical systems
DEHNguard MU 3PH …: Modular surge arrester for application in 3 Phase High-leg Delta systems
DEHNguard … R: With remote status indicator for monitoring device (Form C / SPDT contact)

The DEHNguard SU/MU … surge arresters are modular DIN rail mounted ules. Each protective circuit of the multipole surge arresters and each
SPDs in the functional Red/line family design and set new standards in protection module are mechanically coded to guard against installing an
terms of safety and user-friendliness. The SPDs are UL 1449 4th Edition incorrect module.
certified as Type 1 Component Assemblies and are designed for all com- The dual “Thermo Dynamic Control” monitoring device was not only de-
mon electrical power systems. These devices have optimised voltage pro- veloped on the basis of national and international product standards, but
tection ratings and therefore provide ideal surge protection for the United also reflects decades of experience in the world market of surge protective
States and Canadian electrical panel markets. devices and considers practical applications where arresters might be
The enhanced maximum discharge capacity of 50 kA, the high short cir- damaged. As with all DEHN surge arresters with “Thermo Dynamic
cuit current rating (SCCR) of 200 kA and the fact that there is no need for Control”, the intensity of the discharge current and the surface tempera-
additional overcurrent protection devices mean that the DEHNguard SU/ ture of the heavy-duty varistor are evaluated. The visual status indicator
MU product family fulfils all the requirements of modern day electrical with green and red indicator flags shows the availability of every protec-
applications. Besides the variety of features shows that both reliable surge tive circuit. Apart from this standard visual indication, DEHNguard M SU/
protection and equipment safety are key elements of the modular MU ... FM devices feature a Form C contact (SPDT).
DEHNguard surge arresters. The application-based product designation As the remote signalling contact is designed as a floating changeover
makes it considerably easier to choose the correct device for the relevant contact, the remote signal can, depending on the circuit concept, be used
application as well as the module locking system firmly fixes the protec- as a make or break contact. The surge arresters of the multipole modular
tion modules to the base part. Neither vibration during transport nor the DEHNguard MU family feature multifunctional terminals on a standard-
enormous electromagnetic forces of discharge can loosen the protection ised spacing of 1 module for the connection of wires and busbars, allow-
modules. Nevertheless, they can be easily replaced without tools by simply
Surge Arresters – Type 2 pressing the user-friendly module release button of the protection mod- of applications can be easily connected in series for optimal protection.
ing easy wiring with other DIN rail mounted devices. Thus, a wide range

908 300 DG MU 3PY 208 3W+G
908 314 DG MU 3PY 480 3W+G DEHNguard MU 3PY ... 3W+G
908 301 DG MU 3PY 600 3W+G
DIN rail mount, pluggable surge arrester consisting of a base part and plug-in protection modules for application in 3 Phase Wye electrical
908 300 4013364148680 04 01 02 17 303 g
223,50 € systems
908 314 4013364148703 04 01 02 17 339 g
223,50 €
908 301 4013364148727 04 01 02 17 363 g
223,50 €
Type DG MU ... 3PY 208 3W+G 3PY 480 3W+G 3PY 600 3W+G
Part No. 908 300 908 314 908 301
SPD classification acc. to ANSI/UL 1449 4 Ed. Open-Type 1 SPD Open-Type 1 SPD Open-Type 1 SPD
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Type 4-1 Component Type 4-1 Component Type 4-1 Component
SPD classification acc. to CSA - C22.2 No. 269.1-14
Assembly Assembly Assembly
Max. continuous operating voltage AC [L-G] / [L-L] (MCOV) 180 V a.c. / 360 V a.c. 385 V a.c. / 770 V a.c. 510 V a.c. / 1020 V a.c.
Nominal discharge current (8x 20 µs) (In) 20 kA 20 kA 20 kA
Max. discharge current (8/20) (Imax) 50 kA 50 kA 50 kA
Voltage protection rating [L-G] / [L-L] (VPR) 600 Vpk / 1200 Vpk 1200 Vpk / 2500 Vpk 1500 Vpk / 3000 Vpk
Max. mains-side overcurrent protection Not needed Not needed Not needed
Approvals UL, CSA UL, CSA UL, CSA

70 You will find detailed product information on our website Valid as of August 1, 2020