pag. 5
MDE/C133 2561 001
MX3IPG2A
100
1000
10000
0
1
2
3
4
5
Capacità [m icrof]
Soglia [Ohm]
1. TECHNICAL DATA
This device belongs to the Modulex 3 line and digitally proc-
esses the currents and voltages injected into the rotor winding
of synchronous machines, through the use of the attachment
X2/IPG2A, to provide a rotor ground protection besides a
number of additional functions, among which are the direct
over- and undervoltage monitoring (Vaux control).
The user interface is available locally through a display unit,
and remotely, through a LONWORKS
(TM)
field bus with a control
and monitoring system.
It is furthermore capable of communicating with a Personal
Computer through a connector located on the relay front and
an interface programme. This feature makes it easier and
safer to programme the setting parameters and configure and
read the set values, measurements and logged events; the
programming can also be taken from previously created files.
Protective functions:
minimum resistance with two thresholds
with definite time operating characteristic
injected overcurrent with one threshold
with definite time operating characteristic
injected undervoltage with fixed threshold
with fixed time operating characteristic
injected overvoltage with fixed thresholds
with fixed time operating characteristic
direct undervoltage with two thresholds
with definite time operating characteristic
direct overvoltage with two thresholds
with definite time operating characteristic
possibility of two groups of settings, namely main and
spare
Measurement functions:
resistance values stated in
Ω
injected current value stated in A
injected voltage value stated in V
direct voltage values stated in Un
injected overcurrent value stated in A
logging of the latest 8 events with storage of tripped
thresholds values, date, time and injected current and
direct voltage values as measured when the fault showed
up
fault recorder: recording, for 2.5 s in all, of the instant values
(12 samples per period ) taken by the input quantities
(Iinjected,Vinjected,Vdirect), as well as of the 19 logical
states among which digital inputs and additional timers are
found
RCE logging: recording of the latest 32 changes of state
(with related date and time); only available through PC or via
network. .
Other functions:
selection of the setting range of the direct voltage thresh-
olds by means of internal jumpers
selection of the rated frequency between 50Hz and 60Hz
selection of dialogue language (Italian, English, French
and Spanish)
self-monitoring with detailed indication of fault and alarm
type through LED's and "normally energized" output relay
(X6)
possibility of serial communication both with a local PC or
via a LONWORKS
(TM)
field bus
three auxiliary timers available free for allocation to digital
inputs
possibility of assigning one or more device functions to
each output relay and LED
possibility of separately setting all output relays as "all
normally energized" or "all normally normally de-energized"
possibility of selecting, for each output relay and LED, the
monostable or bistable (hand-reset) operating mode
possibility of assigning a minimum pulse width to each
output relay
opto-insulated digital inputs programmable for lockout,
drive and reset functions, each input being enabled by
normal energizing or de-energizing. Optionally, they may be
used to supervise the tripping circuit for continuity
a partial and a total counter per trip threshold
MINIMUM RESISTANCE PROTECTION (rotor ground)
Settings
first threshold
R<:
200÷4000
Ω
/ OFF
starting signalling delay
tstart:
0.00 ÷ 9.99 s
definite time trip delay
t1:
0.05 ÷ 600 s
second threshold
R<<:
200÷4000
Ω
/ OFF
starting signalling delay
tstart:
0.00 ÷ 9.99 s
definite time trip delay
t2:
0.05 ÷ 600 s
threshold settings step:
1
time setting step:
0.01
threshold variation as a function of variation occurring between winding
and mass:
Capacity [
µµµµµ
F]
Threshold [
ΩΩΩΩΩ
]