ERICO TDS-MOVTEC Surge Diverters - Manual (Page 5)

D I N L I N E I N S T A L L A T I O N I N S T R U C T I O N S
PAGE 5
2. INTRODUCTION
Movtecs are designed to protect mains
powered equipment from the damaging effects
of lightning and transients. They are ideal for
point-of-entry shunt protection applications
where robustness and high surge ratings are
required.
The Movtec family is designed to suit many
distribution systems including TN-C, TN-S,
TN-C-S and TT. They can be selected for use
with distribution systems with nominal
voltages of 110/120V, 220/240V and 277Vrms
at frequencies of 50/60 Hz.
The TDS Technology (Transient
Discriminating Suppressor) units are
specifically designed for distribution systems
that may feature poor voltage regulation
where the actual supply voltage may exceed
the nominal ratings for extended periods.
This Installation Manual details the preferred
procedure for the installation of the family of
Critec Movtec™ Surge Diverters.
The Critec Movtec family includes:
• Critec Movtec, Single Mode, enhanced
MOV technology units eg. (MT275V-135K-A)
• Critec TDS-Movtec, Single Mode, TDS
technology unit featuring high over-voltage
withstand for added robustness (TDS-MT-
277)
• Critec TDS-Movtec, Three Mode, TDS
technology unit featuring high over-voltage
withstand for added robustness (TDS-MTU)
TDS-Movtec units are coloured blue for easy
identification, while enhanced MOV
technology units are coloured red.
In this manual, reference to “ Movtec” also
includes “TDS-Movtec”.