This product is obsolete. 

Consider the alternative MTDV4 relay for your application. Note that this relay is not directly equivalent to the 2V731.

The 2V731 Series relays are solid state voltage sensing relays with electromechanical output contacts. Designed for application on DC voltage systems the 2V731 is ideally suited to monitor power supply voltage levels wherever high accuracy and reliable, maintenance free operation is essential. The 700 Series range of electronic measuring relays are manufactured as a modular approach to electrical system protection & control. Designed to meet rigid Australian & international specifications the 700 Series provide a flexible, cost effective & extremely reliable solution for a multitude of applications under electrically hostile conditions.