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2. OPERATION PRINCIPLES
For this breaker, the BUS side refers to the voltage value independent from the line 89, that is, V2. The
LINE side refers to voltage values V4 or V1, depending on the status of 89.
2.2. MONITORING AND REGISTERING FUNCTIONS.
The MOV system can measure the following magnitudes:
Line voltage values (three phases), for busbar 1 and 2, in module, phase, and frequency.
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These measures can be accessed locally on the unit's LCD, or using the communications software GE-
LOCAL.
The MOV system monitors the status of an associated line selector switch through digital inputs 89/a, and
89/b when the selector switch is set to have two contacts, and through input 89/a when it is set to have only one
contact. The selector switch status is accessible using the local MMI, or the communications program. This last
will display the status in real time on a bay mimic, visible in the GE-LOCAL program. (This screen, as well as the
measures screen, can be configured by the user with GE-INTRO configuration software).
The status represents the digital information from all the equipment units (inputs, pickups, alarms, etc.).
Those signals included in the status are grouped in groups of 16; there are 10 different groups in the status; the
last group corresponds to the 16 AND gates that can be defined using the programmable logic through GE-INTRO
software. Therefore, the desired signals, or the result of an AND gate from a group can be taken to this last group
AND1....AND16.
The MOV unit front panel has a total of 17 LED indicators. One of them is a two-color LED with a fixed
function, system alarm (RED), or system ready (GREEN). The rest are red color LEDs, and can be configured by
the user with the GE-INTRO software; they can be assigned either to an event (selectable between the 32
protection and 16 communications events), or to an AND gate of up to 16 events. Events are defined using the
protection or communications status, assigning one of them to the activation of a status, or an OR gate of up to 16
status included in the same group.
Besides, each LED can be configured to incorporate a memory in case of lack of power supply (the status
of those LEDs with memory is stored in EEPROM memory, so that when the power supply is restored, those LEDs
that were lit before the power breakdown will continue to be lit), and to be blinking or not.
A LED testing option is included. All indicators will light up when pressing the TARGET RESET
pushbutton. This button allows to reset the LED signals when it is kept pressed.
MOV units are supplied with the following default LED configuration:
10
2.2.2. STATUS OF THE ASSOCIATED LINE SELECTOR SWITCH
MIV Digital Multifunctional Protective Relay
2.2.1. MEASURING
2.2.3. VISUAL SIGNALLING (LEDS).
GEK-106271
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