Manual pCoOEM Bicircuit - Rhoss

than the set delta, if the control by opportune manufacturer’s parameter protected from specific
password is activated, after the set delay, the alarm will be signalled.
11.7 Phases control management
11.7.1 Used inlets
• Three-phase card for phase sequence control and voltage measure
11.7.2 Used parameters
• Feed nominal voltage
• Type of feed
• Phase monitor alarm activation (both tension min/max alarms and wrong phase sequence)
• Network frequency
• Minimum voltage treshold
• Maximum voltage threshold
11.7.3 Used outlets
• Relay digital outlet of cumulative alarm
11.7.4 Working description
The pCO1OEM onboard card installation of a phase monitor card and phase wideness measure is
provided, according to that the direct verify of the right link of the unit and the probable anomaly
absorption of the phases is possible.
The pCO OEM controller will be able to monitor the exact phases system in the three-phase systems,
and if this is not correct, it will signal it by a manual reset alarm with following switch-off of all the linked
loads.
That alarm can be disabled by a special parameter protected from specific password, visible/adjustable
from PGD interface.
Ass well as the correct sequence control of the phases it provides at the control of the wideness
according to two set minimum and maximum thresholds.
According to the type of used feed system, the program will be able to decide if it’s whether or not the
case to feed the measured F-N o F-F voltage (neutral-phase or phase-phase), the following table reports
the provided correspondences:
Type of Voltage Type of voltage
distribution
measurement
1 F + N 230 V F-N
3 F + N 400 V F-F
3 F 230 V F-F
From the table results that in three-phase systems the indications of phase-phase voltage will be always
supplied.
To indicate the type of used distributions, a set-up parameter that indicates the provided phases number
and if it’s whether or not present the neutral will be introduced; that parameter will be protected from
specific manufacturer’s password and visible/adjustable by PGD user’s interface.
From the installed unit values is possible to determine the working voltage threshold over those the unit
working is not guaranteed; will be then introduced a set-up parameter of the system’s nominal voltage.
That value protected from manufacturer’s password is visible by PGD user’s interface will allow the
preventive definition of the thresholds of minimum and maximum working voltage.
Normally the tolerance is + 10%, on the basis of that values, as soon as the voltage value of nominal
feed is set-up, the program will do a rapid calculation, automatically setting the thresholds of the width’s
maximum and minimum alarm of the phases.
If adjust those values for particular unit requirements is necessary, will be possible enter at the
opportune parameters, protected from manufacturer’s password.
Rhoss S.p.A. S.A.T.
Rev. 1.0 20/01/05 42