Neutral Voltage Displacement TTG7034 / 134
The TTG7034 and TTG7134 relays are designed to monitor neutral displacement voltage on AC networks (ANSI code 59N).  They are desensitised to third harmonics.
The neutral voltage may be measured in one of two ways:
  • if the neutral is accessible: from a single-phase voltage transformer connected between neutral and earth/ground. 
  • If the neutral is not accessible: directly from three voltage transformers in star/star connection.
TTG7034 is a Definite Time relay
TTG7134 operates instantaneously.

See the homepage for Static relays for the full brochure.