Schweitzer Engineering Laboratories SEL-167D, Instruction Manual

Page: 29 / 123

Relay Outputs
Seven output relays are provided. They are listed below with terminal numbers and contact
types.
Table 2.3: Relay Outputs
Output Relay Contact Type
TRIP
CLOSE
A1
A2
A3
A4
ALARM
a
a or b
a or b
a or b
a or b
a or b
a or b
All relay contacts are rated for circuit breaker tripping duty.
Three of the seven output relays perform fixed functions; the remaining four can be
programmed with the LOGIC command.
TRIP Output
This output closes for any number of user-selected conditions. The conditions are grouped as
follows: unconditional, subject to PT input assertion, subject to the absence of BT input, and
subject to the breaker being open. The TRIP output never closes for less than the duration of
the TDUR setting. After this interval, it opens when the fault condition ceases and the over-
current elements in Relay Word Row 1 have dropped out, or when the TARGET RESET
button is pressed.
CLOSE Output
This output closes for reclose operations, assertion of the DC input, and in response to the
CLOSE command. It opens when the 52A input is asserted or after the reclosing relay reset
interval, whichever occurs first.
Date Code 940208
Specifications
SEL-267D/167D Instruction Manual
2-9