IM30-GLF
Doc. N° MO-0062-ING
Rev.
3
Date
14.02.2005
Copyright 2010 - Microener
Firmware:
2.0X
Pag
5
of
31
The Stator Earth Fault element F64S does not work when the frequency differs from the nominal
value by more than
10% due to the action of its pass-band filter.
The functions F40 (underimpedance = loss of excitation) and F32 (Reverse Power) are
automatically disactivated when frequency is less than 25Hz.
The trip level of the overcurrent element of this version has a different setting range :
I>=(0.2-2.5)Ib. At the end of the generator/motor start-up period, this element is normally
disactivated via the digital input 2 (terminals 1-
2 shorted) by programming “ 2=I1..... (see § 12 :
Output relay’s programming).
If has to be taken into account than that the relay computes the RMS values of the input
quantities on each half-cycle whereas the frequency is detected on each full cycle. It is then clear
that the computing time of the RMS values is inversely proportional to the frequency. Any trip time
delay is started as soon as at least one RMS value above the set level has been detected. As
already remarked the dependent time delay are affected by the frequency whereas the
independent time delays are not.
Make electric connection in conformity with the diagram reported on relay's enclosure.
Check that input currents are same as reported on the diagram and on the test certificate.
The auxiliary power is supplied by a built-in interchangeable module fully isolated an self protected.
2.1 - Power Supply
The auxiliary power is supplied by a built-in interchangeable module fully isolated an self protected.
The relay can be fitted with two different types of
power supply
module :
24V(-20%) / 110V(+15%) a.c.
80V(-20%) / 220V(+15%) a.c.
a) -
b) -
24V(-20%) / 125V(+20%) d.c.
90V(-20%) / 250V(+20%) d.c.
Before energising the unit check that supply voltage is within the allowed limits.
