The ACE3000 type 420/520 is a polyphase single/multi-rate residential meter. Depending on the configuration, it can have an integrated Real Time Clock for up to 6 rates with Maximum Demand. It also has a host of anti-fraud features. It provides extra information for on-site installation diagnostics including wrong phase sequence, reverse energy and voltage/current per phase. The metering data can be transferred into a HHU device on-site through the optical port or remotely through the optional Data Bus Output port. Different options can be combined together to meet customer requirements.