DEHNguard® modular for North America
Modular multipole surge arrester
• No need for additional overcurrent protection devices
• Short circuit current rating (SCCR) 200 kA
• ANSI/UL 1449 – 3rd Ed. Recognized
• High discharge capacity due to heavy-duty zinc oxide varistors (Imax 50 kA 8x20μs)
• High reliability due to "Thermo Dynamic Control" SPD monitoring device
DEHNguard MU SP …: Modular surge arrester for application in Split Phase systems
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 enhanced maximum discharge capacity of 50kA, the high short circuit current rating (SCCR) of 200kA and the fact that there is no need for additional overcurrent protection devices make the DEHNguard® SU/MU product family fulfil all requirements of nowadays electrical applications. Besides the variety of features shows that both reliable surge protection and equipment safety are key elements of the modular DEHNguard surge arresters. The application-based product designation, which makes it considerably easier to choose the correct device for the relevant application, as well as the module locking system firmly fixes the protection modules to the base part. Neither vibration during transport nor the enormous electromagnetic forces of discharge can loosen the protection modules. Nevertheless, they can be easily replaced without tools by simply pressing the user-friendly module release button of the protection modules. Each protective circuit of the multipole surge arresters and each protection module are mechanically coded to ensure against installing an incorrect module.
The dual "Thermo Dynamic Control" monitoring device was not only developed on the basis of national and international product standards, but also stands for experience of decades in the world market of surge protective devices and considers practical applications where arresters might be damaged. As with all DEHN surge arresters with "Thermo Dynamic Control", the intensity of the discharge current and the surface temperature of the heavy-duty varistor are evaluated. The visual status indicator with green and red indicator flags shows the availability of every protective circuit. Apart from this standard visual indication, DEHNguard M® SU/MU ... FM devices feature a Form C contact (SPDT).
With its floating changeover contact, the remote signal can be used as a make or break contract according to the particular circuit concept. The surge arresters of the multipole modular DEHNguard® MU family feature multifunctional terminals on a standardised spacing of 1 module for the connection of wires and busbars, allowing easy wiring with other DIN rail mounted devices. Thus, a wide range of applications can be easily connected in series for optimal protection.