КV4080 is digital measuring, fully programmable device from series 4080, designed on
basis of microcontrollers. The device is used to measure middle/high voltage in electrical
substations and power plants. It measures the secondary voltage of a voltage transformer with nominal
secondary voltage 100VAC (or other voltage in range of 60-220VAC) and shows the primary voltage in kilovolts.
KV4080 is powered by the measured voltage. The unit is designed to be mounted on boards in control rooms of
electrical substations.
user manual
| - |
basic option, without any relay contacts, user menu
is not code-protected |
| R |
there are three relay contacts that provide remote
signalization, acting when certain programmed voltage
levels are reached |
| 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 “C” and “X”.
| nominal input voltage |
100 VAC |
| minimum input voltage value |
30 VAC |
| maximum input voltage value |
270 VAC |
| measuring circuit input resistance |
min 200kOhm |
| display |
super bright red, 4-digit, 76х25 mm visible, purple filter |
| measurement error |
< 0.5 % rgd + 2 digit |
| measurement cycle |
< 1 s |
| relay contacts count |
up to 3 |
| power consumption |
< 3 W |
| work temperature |
from 0° C to 55° C |
| storage temperature |
from -50° C to +90° C |
| dimensions (H/W/D) |
48/96/85 mm or 96/96/85 (w/o plugs); 48/96/95 mm or 96/96/95 (with plugs) |
| mounting hole (H/W) |
43/90 mm or 90/90mm quad, centered |
| protection class |
IP52 front, IP31 back |
| own weight |
320 g |
In its normal working mode KV4080 shows the measured voltage, referred to the primary winding
of the voltage transformer and continuously signalizes if the voltage is inside or outside programmed
range by light-emitting diodes and relay contacts. If the voltage goes outside range, the display
blinks with frequency 2-3Hz (blinking can be turned off any time by user menu). The device signalizes
that measured voltage has gone outside range after programmed amount of time (programmed as number of
consecutive measurements which are outside range). It is done in order to prevent random short-time
switching of the relays. Hysteresis is also added to relay switch-off characteristics to further
improve noise characteristics of the remote signaling. If the voltage goes again in the specified range
plus hysteresis voltage, KV4080 turns off the relays instantly without any delay.
The nominal primary voltage of the voltage transformer can be displayed any time
by pressing the ‘up arrow‘ button.
- nominal primary voltage
- decimal point position
- low voltage level
- high voltage level
- display blinking when Hi/Lo
- hysteresis
- delay for relay contacts switching
