ACS

D060 Analog Input Module

Design Features

D060 Intelligent Analog Input Module

The D060 is an intelligent analog input module that uses Digital Signal Processor (DSP) technology. The D060 was jointly developed by ACS and partner Efacec Automation, and is designed for use with remote terminal units (RTU) and other remote controllers/IEDs.  It provides  additional distribution automation feature and is ideal for use as an autonomous fault detection device.  The D060 is integrated with other devices through MODBUS or DNP3 protocols.

 

D060 Module for DIN rail mounting

 

 

Fault Detection

The D060 provides phase-to-phase and phase-to-ground fault detection, with local or remote fault indication.  The fault type information is also provided with the remote indication. The D060 uses two sets of three external toroidal transformers for current sensing, each mounted on the three phases of a distribution feeder.  This design allows two sets of phase voltage and current to be read simultaneously, allowing fault detection and measurement on two distinct three–phase sections of the distribution network; for example, on either side of an overhead switch.

This measurement capability also allows the D060 to determine the direction of the fault.  This information is crucial to the successful operation of self-healing feeder automation schemes.

 

 

In addition to indicating faults as phase-to-phase or phase-to-ground, the fault detection capability has two detection functions:

  • High over-current detection with high-speed tripping (50, 50N), for extremely fast detection 
  • Low over-current detection with definite or inverse time (51, 51N), for a higher sensitivity to faults

For each three-phase section, there are four setting stages that determine how the fault detection function reacts to faults.

 

 

Fault indication can be provided through one or more of the following:

  • LED indicator on the D060 unit
  • Remote indication to a local or remote supervisory system, using MODBUS or DNP3 protocols (also indicates whether the fault is phase-to-phase or phase-to-ground)
  • A single relay output on the D060 (indicates a fault only, not the fault type or section)

 

 

The fault indication can also be reset through:

  • A local digital input on the D060 unit
  • A timeout associated with each of the two sections
  • Restoration of voltage on each of the feeder sections
  • Remotely from the supervisory system using MODBUS or DNP3 protocols

 

 

Measurement Functions

For each of the associated feeder sections, the D060 supplies the current RMS value and phase angle for each phase, as well as the averages.

The D060 also supplies two sets of three-phase voltage measurements. For each set, it supplies the voltage RMS value and phase angle. The ground current for each phase is calculated using the measured three-phase currents of each section. The D060 also calculates the real and reactive power, the power factor and the frequency.

As an intelligent analog input module, the D060 performs current and voltage auto-calibration. It allows measurement up to 2 p.u., with a precision of 0.5 % (relative to the voltage or current nominal values), as well as fault detection, up to 10 p.u., with a precision of 2% (relative to the current nominal value) or up to 20 p.u. with a precision of 5% (also relative to the current nominal value).

 

Other Characteristics

The D060 automatically performs self-diagnostic functions, providing remote indication of problems through means of a dry contact (digital output).

The D060 is compliant with the most demanding electromagnetic compatibility standards, satisfying the EC mark.

D060 configuration is performed through the front serial port (RJ11), using the provided software configuration tool. Remote configuration is also possible through the communications port using MODBUS or DNP3 protocols.

The D060 is available in a stainless steel enclosure with LED indicators, or can be provided without the enclosure for DIN–rail mounting within an equipment cabinet.