Part of the 70 Series Measurement System, the M871 is a Modular Single Line, Single or Dual Bus monitoring and recording IED. It uses common firmware and software to provide fast, precise, electrical measurements, fault and event records, and trend logs.

The M871 provides flexible and easy interfacing with multiple protocols, including IEC61850, and physical links for constant, cost-effective monitoring and recording. This IED can be fitted with inputs for connection to either protection or measurement CTs and ensures precise, speedy results.

Basic measurement device and more

The M871 provides advanced recording and communications functions not found in standard measurement devices.

Operators have the option to monitor status inputs and control relay outputs. This IED can simultaneously provide information and control to multiple clients or masters and offers both copper and fibre Ethernet ports.

Modular, Flexible Design Allows for In-The-Field Upgrades

The M871 uses a modular design with three chassis options which allows the substation design engineer to add the number and type of optional modules needed for a particular substation application. Modules can be added in the field as needed.

The M871 supports the M870D separately mounted display.

Parameter Name	Parameter Value
Mounting	benchtop
Options and accessories	modular