Section 3 Overview
About this chapter
This chapter presents a general overview of the Operator's manual.
3.1
Operator overview
The Human machine interface (HMI) on the IED provides an ideal mechanism for
the day to day operation and even advanced use of the IED. The keypad, LCD and
LEDs on the front of the IED are what constitute the HMI. Troubleshooting, apparatus
control, monitoring, setting and configuring are all possible via this interface.
Through the screens and menu elements available, as well as the keypad, the user is
able to navigate throughout the menu structure and move from screen to screen. This
document is, to a great extent, arranged in the same way as the IED software is
structured and describes all aspects of operation via the HMI.
The operator can document disturbances so that their causes can be analyzed and
evaluated for future reference. For example, the fault currents and voltages at the time
of the fault can be documented. The operator can also retrieve data about protected
objects, providing further information for fault analysis. This implies viewing the
mean value of current, voltage, power and frequency or primary and secondary
measured phasors. The operator can check the IED status at any time.
In some cases the operator may need to change the way the IED operates. This might
include changing the active setting group or a parameter value. This must always be
done strictly according to applicable regulations because un-authorized changes may
lead to severe damage of the protected object especially if a fault is not properly
disconnected.
3.2
Identify the IED
To identify the IED, open the diagnostics menu. The identity of the IED along with
other data is found under:
Diagnostics/IED status/Product Identifiers
The type of IED, the main function type, its serial number, ordering number and
production date are found here.
Section 3
Overview
RET 670
Operator's manual
1MRK504049-UEN rev. D
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