GE MOV 2000, Инструкция по эксплуатации, Страница: 18 / 78

2. OPERATION PRINCIPLES
GEK-106271 MIV Digital Multifunctional Protective Relay 15
2.4.3. CONFIGURABLE INPUTS AND OUTPUTS
2.4.3.1. Digital Inputs
The MOV system has 6 digital inputs (two groups of 3 inputs with one common in each group). The inputs
can be configured by the user by means of the GE-INTRO configuration program.
The inputs are configured using GE-INTRO configuration software. One of the following meanings can be
assigned to any input: (For more detail about the configuration of the inputs, see GE-INTRO Instruction Book).
•
Table Selection 0 (L)
•
Table Selection 1 (L)
•
External trigger (P)
•
89/a (L)
•
89/b (L)
(L) Indicates a level input.
(P) Indicates a pulse input
There is also the IRIG-B synchronization input already mentioned.
The diagram of external connections, in figure 3, shows the default input configuration.
2.4.7.2. Outputs
The MOV system has 22 configurable outputs.
The outputs are configured using the GE-INTRO configuration software.
The technical characteristics of the outputs are shown in section 4.
The configurable outputs can be programmed using logic based on the internal protection states (pick-ups, trips,
alarms, etc.) The MOV has 160 different internal states, and these can be used to carry out logical operations
NOT, AND and OR, which gives to the unit a great flexibility.
The output configuration logic is done by using different levels. At the first level it is possible to use AND gates of
up to 16 signals (see section 2.2.3). The output is incorporated into the states matrix so that it can in turn be used
in next AND gates of up to 16 inputs. This process can continue until the 16 Ands are used.
Once the AND gates have been configured it is possible to create a second level with OR gates of 16 inputs
limited to the established groups of bytes, and whose logical outputs are assigned to physical outputs of the unit.
The default output configuration is included in the diagram of external connections in figure 3.
2.5. HUMAN-MACHINE INTERFACE (HMI)
The MOV system includes as standard a 20 key keyboard and a 2 line liquid crystal display (LCD) with 16
characters per line. This display has highly reliable LED diode back lighting (the screen brightness can be
adjusted on the rear of the front board).
By means of this interface the user can change the settings, view measurements, carry out operations and
access information stored in the unit. The functions of this local interface and how to use it are described in the
section KEYBOARD AND DISPLAY.