Connecting The Regulator - Sincro SK315 Serie Manual De Uso Y Mantenimiento

6.4.4.2 Connecting the regulator

Input/output connection: PE/L/N/SX+/SX-
• PE - Earth Connection (not used);
• L, N - Power AVR (made with an auxiliary winding in
the stator, or integrated with a PMG);
• Ex +, Ex - Power Exciter stator.
Sensing connection: A/B/C
• A, B, C: the reference voltage can be single or three
phase. For the three phase reference voltage use all
three connectors. For single phase reference use,
connect terminals A-B with a jumper and then connect
the reference voltage to the terminals C and A-B.
Other connections: S3/S4/VB/S5/S6
• S3, S4: on these two connectors, you can apply a
potentiometer (20 kΩ, ½ W) to adjust the voltage
(place the jumper in the position Pot). To set S3 and
S4 as analog input (0 to 3 Vdc, 0 ÷ 5 Vdc, 0 to 10 Vdc),
place the jumper in the position Volt.
To calibrate the voltage range under the condition of the
analog signal, turn the V trimmer fully counterclockwise
(the voltage of the alternator will be at the minimum
value).
Then apply on the connectors S3 and S4 half of the
maximum value of the analog signal and with the V
trimmer adjust the voltage to the rated value. Example:
Analog signal 0 to 5 V, to adjust to 400 V, applied to S3
and S4 a signal of 2.5 V (+2.5 V = S3, S4 = 0 V) and
with V trimmer adjust the alternator voltage at 400 V;
• terminals S5, S6 are not used;
• Vb terminal and S4 terminal are respectively
connected to positive (+) and negative (-) battery (12V)
to program and test the AVR.
Jumpers
• The jumpers DI1-DI2-DI3-DI4 identify the frequency of
rotation of the machine, the voltage to be monitored by
the regulator and the type of sensing, single or three
phase (refer to next page table).
According to the voltage and frequency, the AVR must
AVR SENSING JUMPERS CONFIGURATIONS
DI1 DI2 DI3 DI4
• •
• •
• •
• •
• •
• •
• • • •
• •
26
VOLTAGE
PHASES
/ FREQ.
50Hz
60Hz
400V 3p
• • 460V 3p
230V 3p
• • 115V 3p
400V 1p
280V 1p
230V 1p
• • 115V 1p
be configured as the following table:
• PMG/STD: select the system to feed the AVR.
The jumper must be positioned:
PMG: if the AVR is feeded by a permanent magnet
generator (SK400/450-SK500).
STD: if the AVR is feeded by an auxiliary winding (SK
315-355);
• VOLT/POT: input default state S3-S4
select VOLT for analogic input or POT for external
potentiometer.
Trimmers
• V: Voltage adjustment or adjustment of analogic input
control;
• S: Stability adjustment.
Dip switches stability (DSW) settings
• Dip switches position:
1. 1, 2, 3, 4 in OFF position for alternators from 100
to 300kVA;
2. 1 in ON position, 2,3,4 in OFF position for alternators
from 350 to 650kVA;
3. 1,2 in ON position, 3,4 in OFF position for alternators
from 800 to 1600kVA;
4. 1,2,3 in ON position, 4 in OFF position for alternators
from 1600 to 3000kVA;
5. 1,2,3,4 in ON position for adjusting the stability with
AVR TERM software.