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< Functions >
1ERR. LED, Contact alarm output
When any abnormality or setting failure is found in ETR,
the LED alerts the operators to the abnormal status. When
the power type is P3 to P5, contact output is given be-
tween 513 and 574 on the control circuit terminal block.
•ETR function (Microprocessor, H/W)
•Mis-setting of INST. /MCR dial (P.27)
•Internal wiring of breaker related to ETR
2RUN LED (ETR)
This LED indicates that ETR is functional. When control
power is applied or approx. 10% of current flows into the
main circuit, the internal circuit will start, and the LED will
light.
3RUN LED (Optional setting module)
This LED indicates that the optional setting module is func-
tional.
When the control power is applied or approx. 10% of the
main circuit current flows, the LED will light.
4Trip indicator (LED and contact alarm output)
The LED indicates the tripping or pre-alarm status. When
the power supply type is P3 to P5, contact output is given
between 513 (common) and 524 , 534 , 544 and 554 on
the control circuit terminal block.
When the current exceeds pre-alarm current setting (Ip),
the PAL LED will blink. When the LTD time (1/2 of TL) is
passed, the PAL LED will light and output the contact.
As for the display and interface unit, see the separate instruction manual.
3RUN LED
(GFR)
5TAL LED
4LED indicating
cause of tripping
4LED indicating
cause of tripping
1ERR. LED
2RUN LED
(ETR)
7RESET
button
6MCR
Do not
set
5TAL LED and contact output Option
The ETR temperature detector is made functional by fit-
ting a TAL sensor.
When the power type is P3 to P5, output is given between
513 and 564 on the control circuit terminal block. When
the temperature drops, the output will be reset. To retain
the output, take measures with an external sequence.
6MCR (Making current release) Option
Only when the breaker is turned on (from the off state), it
has the INST function. After it is turned on, the INST func-
tion will be disabled. If you specify the use of MCR when
placing an order, the MCR switch will be incorporated in
the main body. MCR will be functional by setting the INST
setting dial of ETR to the MCR side. (Refer to Fig. 20-2)
7Reset button
The trip indicator (LED and contact alarm output) can be
reset by pressing the “RESET” button on the front panel
of ETR or short-circuiting RS1 and RS2 on the control cir-
cuit terminal block.
(P1 and P2 types are not provided with the function to
reset the indication from the control circuit terminal block.)
A function is provided to temporarily lock LTD and STD
when the INST function is tested with the field test device.
(See the breaker tester instruction manual.)
Fig. 20-1
Functions of electronic trip relay (ETR) parts
Fig. 20-2