MICROENER MM30-D - Signalizations; Signal LEDs and Their Functions; LED Reset Procedures

MM30-D
Doc. N° MO-0037-ING
Rev. 4
Date 24.02.2003
Copyright 2010 - Microener
Pag
16
of
36
4. SIGNALIZATIONS
Eight signal leds (normally off) are provided:
a)
Red
LED
T>
 Flashing when the motor heating “T” exceeds the set alarm level [Ta].
 Illuminated on over-temperature trip. – Also illuminated on activation of RTD
input.
b)
Red
LED
St No
 Flashing on tripping of the element for limitation of the number of
consecutive startings.
 Illuminated at the end of [tBSt].
c)
Red
LED
I<
 Flashing as soon as motor current drops below the set level [I<]
 Illuminated at the end of trip time delay.
d)
Red
LED
Is>,1
 Flashing as soon as motor unbalance exceeds the set level [Is>]
 Illuminated on trip after [tIs>] time delay or on tripping of the single phasing
element.
e)
Yellow
LED
PROG/
I.R.F.
 Flashing when in PROGRAM MODE
 Illuminated when relay internal fault is detected.
f)
Red
LED
I>
 Flashing when motor current exceeds the set level [I>]
 Illuminated on trip after [tI>] time delay.
g)
Red
LED
O>
 Flashing when earth fault current exceeds the set level [O>]
 Illuminated on trip after [tO>] time delay.
h)
Yellow
LED
ROTOR
STALL
 Illuminated on trip of the Locked Rotor element (I>ILR) and/or on activation
of the Speed Control input SpC.
The reset of the leds takes place as follows:

Leds
a
 From flashing to off automatically when motor heating drops below
the alarm level [Ta].
 From steady light to off by the Reset control (front button or serial
command) provided motor heating is below the restart temperature
[Ts].

Leds
b
 From flashing to off by the Reset control (front button or serial
command) only when the restart inhibition time is set to “manual”:
[tBSt]=Rm.
 From illuminated to off when [tBSt] has expired.

Leds
c,d,e,f,g
 From flashing to off, automatically when the lit-on cause disappears.
 From ON to OFF, by "ENTER/RESET" push button only if the
tripping cause has disappeared.

Leds
h
 From flashing or illuminated to off, automatically when the lit-on
cause disappears.
In case of auxiliary power supply failure the status of the leds is recorded and reproduced when power
supply is restored.
T>
StNo
I<
Is>,1
ROTOR
STALL
PROG/
I.R.F.
I>
a
b
c
d
e
f
g
h
O>