DER2 digital regulator instruction manual - rev. 02 - pag. 10
4.2 DER2 connections for typical applications
Drawings SCC0301/00, SCC0302/00, SCC0303/00, SCC0304/00 show DER2 regulator connections for
typical applications.
In case of sensing 75V-150V, with half-phase reference the typical drawing for three-phase connection is
SCC0301/00, while for single phase it is SCC0303/00.
In case of sensing 150V-300V, with half-phase reference the typical drawing for three-phase connection is
SCC0302/00, while for single phase it is SCC0304/00.
5. Setting up the regulator
Selection of the sensing scale takes place directly according to the connection on the power terminal
board; additional settings can be made with 4 trimmers (VOLT, STAB, AMP and Hz) and 3 jumpers
(50/60Hz, JP1 and JP2); the output voltage can also be set with an external analogical signal; additional
settings, including the previous ones but excluding jumpers JP1 and JP2, can be made by modifying the
25 parameters stored in a non volatile integrated memory.
5.1 Alternator voltage signals
Terminals 4-22 of connector CN1 are used for voltage sensing.
5.2 Calibrating sensing
A supplementary calibration may be necessary to compensate any existing tolerances on analogical
voltage acquisition channels; in this case follow the procedure illustrated below.
1. Write
16384
at location 19 (from the
Settings/Advanced
(1)
Menu)
2. Disable VOLT trimmer (from the
Settings/Potentiometers
(1)
Menu)
3. Disable Vext (from the
Settings/Advanced
(1)
Menu)
4. The parameter present in parameter P[5](if three phase sensing) or p[6] (if single phase sensing)has to
be calibrated. Calibration should be adjust in order to obtain 225V from the generator output when the
sensing is cabled to U
FB
(9-10-11-12) and U
FG
(6-7), or to 125.5V if connected U
FB
(9-10-11-12) and
U
HG
(6-7).Please note that a paramenter increment will result in a voltage reduction of the system. It is
recommended to measure the voltage output with an instrument capable to catch the average value of
the voltage.
5. In order to ensure that the value of voltage (available also at location 36) is the same as the value
measured at point 6, calibrate the data at location 7, reading the value of Volt box in the “status” area of
Settings/Advanced
(1)
menu.
.
6. Enable the trimmers again, if it is desired to have them active (from the
Settings/Potentiometers
(1)
menu).
7. Enable Vext (from the
Settings/Advanced
(1)
Menu) if you want to be active.
6. 50/60 Signal
A jumper is located on the 50/60 input (terminals 25 and 26); if enabled from the
Configuration
Menu, it
provokes the commutation of the underspeed protection threshold from 50·(100%-
α
Hz%) to 60·(100%-
α
Hz%), where
α
Hz% represents the position relative to the Hz trimmer or the percentage value entered at
parameter [21 (where 10% corresponds to 16384).
7. APO Contact
The acronym
APO
stands for
A
ctive
P
rotection
O
utput: (connector CN1 terminals 23 and 24) 30V-100mA
non-insulated open collector transistor, normally closed, if the “APO Invert” flag (
2)
is active (default), opens
(with a delay that can be programmed from 1 to 15 seconds) when, of all the alarms, one or several sepa-
rately selectable alarms are active.
NOTE
(1)
: Software DxR Terminal
