The MTL WWIP-N is a high-powered surge protector with solid-state electronics and a gas-filled discharge tube (GDT) capable of diverting 10kA
impulses providing far more protection than the transient protection available from the transmitter manufacturers. Specially designed for 2-wire
field-mounted instruments in the water/wastewater industry, the WWIP-N is encased in a corrosion resistant ANSI 316 stainless steel housing.
Installation of the WWIP-N can easily be carried out retrospectively to existing installations. The unit is screwed into any unused conduit entry
on the field instrument case and flying leads are connected to the terminal block (+ve, -ve) and the internal earth stud. The WWIP-N operates without
in any way affecting normal operation - passing ac or dc signals without attenuation while diverting surge currents safely to earth and clamping
output voltages to specific levels. The WWIP-N is available for 1/2" NPT threaded entries.
The all-important earthing connection is made to the local casing of the transmitter with no separate earth connection or ground stake at the transmitter
being needed. In operation, the WWIP-N makes sure that the transmitter electronics are never exposed to damaging transients between lines or between lines
and casing/earth. Any surge current appearing as a series-mode or common-mode transient is converted into a common-mode voltage - whereupon the transmitter
electronics are temporarily raised to some higher voltage level before ‘floating' down automatically (and without damage) to resume normal operation.
