IG-267-EN versión 01; 07/04/2017
52
Sensors General Instructions
ekor.rpa
6.2.2. ekor.evt-c
The ekor.evt-c sensor comprises two elements: an initial
EPOXI element which houses an encapsulated capacitor
which joins the medium-voltage part to the low-voltage
part, applying a transformation ratio at output. The output
signal will be conditioned by the second element, a plastic
box containing the electronics and the BNC outputs which
will connect to the relay or to the corresponding metering
equipment.
The sensor measures the voltage through a capacitive
coupling. This voltage metering can be delivered in current
or voltage, adapting to the different relay inputs of current
manufacturers on the market. It can also measure partial
discharges and establish communication via PLC.
The electronic circuit has two BNC outputs. The first one is
for voltage metering, whilst the second one is for filtering
high frequency signals, PLC communication and metering
of partial discharges.
Figure 6.7. ekor.evt-c
ekor.evt-c Voltage sensors (BNC metering output)
Maximum voltage (compound)
36 kV
Transformation ratio
10 kV/100 µA
Metering class (together with the equipment)
0.5
Protection class (together with the equipment)
3P
Burden:
0.01 – 0.15 mVA
Frequency
50 – 60 Hz
Voltage range (compound)
12.1 – 33 kV
IP Grade
IP65
Temperature range
- 10 °C to + 60 °C
Connectors
BNC
Metering cable
Coaxial 50 Ω model RG1747/U
Reference standard
IEC 61869-3
IEC 60044-7
For the BNC output identified as PLC communications, contact Ormazabal's technical-commercial department
Table 6.5. ekor.evt-c sensor
Figure 6.8. ekor.evt-c dimensions
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