Sel SEL-DTA2, Инструкция по эксплуатации

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2.9
Date Code 20020329
SEL-DTA2 Instruction Manual
Specifications
Rear Panel Connections and Configurations
Relay contacts A1–A5 reflect new fault information. A1–A4 indicate the
involved phases; A5 indicates that at least one phase is involved. A1–A5
deassert in response to either of two conditions:
1. Assertion of the RESET isolator input clears A1–A5
immediately and asserts the RST ACK output. The RST ACK
signal is valuable for interfacing to RTUs and other instruments
requiring verification of proper device operation.
2. If, after a settable interval (RESET), the instrument detects no
RESET input assertion, A1–A5 reset automatically.
A settable time interval (LOCK) controls update of contact outputs A1–A5
and any analog outputs dedicated to fault location. During LOCK cycles after
a fault, outputs are not affected by subsequent faults. This feature can be used
to avoid replacing accurate fault information with less accurate data (this may
occur during reclosing operations).
The RST ACK output is tied to the RESET isolator input. When RESET is
asserted, RST ACK asserts until a fault occurs.
A6 16,17 a RST
ACK
All fault-related analog and con-
tact outputs are reset.
ALARM 18,19 b ALARM An alarm condition exists.
a
Shown in the de-energized state. You can order these contacts from the factory with either an
“a” or “b” configuration.
Table 2.2 Contact Assignments and Signal Descriptions (Sheet 2 of 2)
Terminal
Block
Terminal
Block
Positions
Standard
Contact
Arrangement
a
Signal Description