D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 581
D90
Plus
Line Distance Protection System
Chapter 12: Local interface
Local interface
This section outlines how to program the D90
Plus
local interface features.
Local interface overview
The front panel of the D90
Plus
provides a color LCD annunciator alarm panel with an
optional second LCD display for human-machine interface (HMI) functions that include
user-configurable metering and control pages, access to the digital fault recorder, physical
input/output status, and equipment maintenance functions. Keys are provided at the
bottom of each display for navigation and at both sides of the front panel HMI display for
assigned user control actions. These control actions can include selection of a breaker or a
disconnect switch in a select-before-operate sequence, or direct operation of a user
definable push-button or selector switch element. Up to 30 pushbutton instances, 10
selector switch instances, 6 disconnect switches, and six breakers are supported on the
D90
Plus
.
Figure 507: Front panel interface
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