SI4100 is digital measuring, fully programmable device from series 4100, designed on basis of microcontrollers.
SI4100 shows the current position of the tap changer of the high-voltage transformer in electrical substations.
The unit is part of tap changer-motor drive equipment. The position of the tap changer can be read either analogue
(by resistor matrix) or digital (BIN or BCD input). The unit is designed to be mounted on boards in control rooms
of electrical substations.
user manual
- (A/D) |
basic option - reads and shows current tap changer step |
A |
analogue input (resistor matrix) |
D |
digital BIN or BCD input |
B |
digital BIN or BCD output for remote signalization |
C |
code-protected user menu |
X |
user is not allowed to change device settings |
* - Every option can be ordered in any combination with other options,
excluding versions “А”
and “D”. One of the options - “А” or
“D” must be chosen.
input |
analog / BIN / BCD |
digital input voltage range |
5-48 VDC |
analogue input single resistor step |
6/ 8/ 10 Ohm |
analogue input maximum matrix resistance |
390 Ohm |
analogue input maximum steps |
39 when 10 Ohm; 48 when 8 Ohm; 64 when 6 Ohm |
digital input maximum steps |
127 when BIN-input; 79 when BCD-input |
maximum wiring length |
* 200 m / 0.75mm2; 400m / 1.5 mm2; 700m / 2.5
mm2 |
power supply |
55-250 VAC (80-350 VDC)/ 30-270 VAC (42-380 VDC) |
display |
super bright red, 4-digit, 94х29 mm visible, purple filter |
power consumption |
< 3 W |
work temperature |
from 0° C to 55° C |
storage temperature |
from -50° C to +90° C |
dimensions (H/W/D) |
144/144/65 mm (w/o plugs); 144/144/75 mm (with plugs) |
mounting hole (H/W) |
136/136 mm quad, centered |
protection class |
IP52 front, IP31 back |
own weight |
320 g |
The current position (step) of the tap changer is displayed. After the tap position
change the new position is displayed with reaction time lower than 1s and the new
position is coded as programmed by the user (BIN or BCD) and sent to the output. While ‘up arrow‘ button is
pressed and the analogue input is selected, the maximum number for the resistor matrix is displayed.
- input type - analogue/ BIN/ BCD
- digital input polarity
- output type - BIN/BCD and relay polarity (NO/NC)
- maximum steps at analogue input
- analogue input single resistor step
- display blinking
- separate step display
- saved preset data entry