Results for: Laboratorio Central Oficial de Electrotecnica
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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Spain, LCOE (Laboratorio Central Oficial de Electrotecnica)
High voltage and current , Impulse voltage and current: switching impulse test voltage value : 1 kV to 100 kV
High voltage divider, high voltage measuring system, EMC surge generator
Relative expanded uncertainty : 1 mV/V
Comparison with high voltage reference measuring system
Impulse shape : according to IEC 60060-1; 1kV to 100 kV
According to IEC 60060-2.
Approved on 07 February 2019
Institute service identifier : LCOE/70
High voltage and current , High AC voltage: peak values : 1 kV to 500 kV
Peak voltage responding measuring system, AC voltmeter, AC voltaqe source
Relative expanded uncertainty : 5.0E2 mV/V
{"row_1":{"col_1":"","col_2":"Expanded uncertainty (mV/V)"},"row_2":{"col_1":"1 kV to 200 kV","col_2":"0.5"},"row_3":{"col_1":"200 kV to 500 kV","col_2":"1"}}
Comparison with reference system
Frequency : 50 Hz, 60 Hz
Approved on 07 February 2019
Institute service identifier : LCOE/64
High voltage and current , High AC voltage: RMS value : 1 kV to 500 kV
RMS voltage responding measuring system, AC voltmeter, AC voltage source
Relative expanded uncertainty : 5.0E2 µV/V
Comparison with reference system
Frequency : 50 Hz, 60 Hz
Approved on 07 February 2019
Institute service identifier : LCOE/62
High voltage and current , High DC voltage: average value : 1 kV to 200 kV
High DC voltage measuring systems, DC voltage sources, DC voltmeters
Relative expanded uncertainty
100, (50 for 1 kV level)

The uncertainty is expressed in µV/kV

Comparison with reference system
Approved on 07 February 2019
Institute service identifier : LCOE/59
High voltage and current , Impulse voltage and current: lightning impulse test voltage value : 1 kV to 700 kV
High voltage divider, high voltage measuring system, EMC surge generator
Relative expanded uncertainty : 5 mV/V
Comparison with high voltage reference measuring system
Impulse shape : according to IEC 60060-1
According to IEC 60060-2
Approved on 07 February 2019
Institute service identifier : LCOE/67
High voltage and current , High DC voltage: ratios : 1.00E-6 to 1
DC high voltage dividers, DC high voltage probes
Relative expanded uncertainty
100E-06, (50E-06 for 1 kV level)
Comparison with reference divider
Voltage : 1 kV to 200 kV
Approved on 07 February 2019
Institute service identifier : LCOE/61
High voltage and current , High AC voltage: voltage transformer ratio error : 0 to 0.02
Voltage transformer, voltage divider
Absolute expanded uncertainty : 5.0E-5 to 1.0E-4
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 kV to 22 kV","col_2":"50E-06"},"row_3":{"col_1":"23 kV to 500 kV","col_2":"100E-06"}}
The expanded uncertainties given in this table are relative to the measured value and thus dimensionless
Bridge
Primary voltage : 1 kV to 500 kV
Secondary voltage : 1 V to 500 V
Frequency : 50 Hz, 60 Hz
Approved on 07 February 2019
Institute service identifier : LCOE/65
High voltage and current , Parameters for other impulse voltage types: other impulse measuring system : 1 kV to 100 kV
High voltage measuring system for Very Fast Transients: voltage scale factor
Relative expanded uncertainty : 1.1E1 mV/V
Comparison with high voltage reference measuring system
Time to steady state, ts, : 6 ns to 25 ns
Calibration of the scale factor of very fast transients measuring systems using a high voltage step (see figure 6 of AMD 1 of IEC 60270 for parameters definition)
Approved on 12 April 2021
Institute service identifier : 73
High voltage and current , High AC current: ratio error : 0 to 0.02
Current transformer
Absolute expanded uncertainty : 5.0E-5 to 1.0E-4
{"row_1":{"col_1":"% I<sub>R</sub>","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 % ≤ I<sub>R</sub> &lt; 20 %","col_2":"5.10<sup>-5</sup>"},"row_3":{"col_1":"20 % ≤ I<sub>R</sub> ≤ 200 %","col_2":"1.10<sup>-4</sup>"}}
The expanded uncertainties given in this table are relative to the measured value and thus dimensionless. IR = rated current of the current transformer to be calibrated.
Comparison with reference standard
Primary current : 0.01 A to 8 kA
Secondary current : 0.01 A to 10 A
Frequency : 50 Hz, 60 Hz
Approved on 12 April 2021
Institute service identifier : 71
High voltage and current , Electric discharge: apparent charge : 0.2 pC to 1.00E5 pC
Partial discharge calibrator: apparent charge q
Relative expanded uncertainty : 1.5E1 mC/C
Comparison with digital integration
Approved on 12 April 2021
Institute service identifier : 76
High voltage and current , High AC voltage: voltage transformer phase displacement : 0 crad to 2 crad
Voltage transformer, voltage divider
Absolute expanded uncertainty : 3.0E-3 crad to 2.0E-2 crad
{"row_1":{"col_1":"","col_2":"1 kV to 22 kV","col_3":"23 kV to 500 kV"},"row_2":{"col_1":"1E-06 crad to 2 crad","col_2":"0.003","col_3":"0.02"}}
The expanded uncertainties given in this table are expressed in crad
Bridge
Primary voltage : 1 kV to 500 kV
Secondary voltage : 1 V to 500 V
Frequency : 50 Hz, 60 Hz
Approved on 07 February 2019
Institute service identifier : LCOE/66
High voltage and current , Parameters for other impulse voltage types: other impulse measuring system : 6 ns to 25 ns
High voltage measuring system for Very Fast Transients: time to steady state, ts
Absolute expanded uncertainty : 1.5 ns
Comparison with high voltage reference measuring system
Step voltage magnitude : 1 kV to 100 kV
Calibration of the time to steady state of very fast transients measuring systems using a high voltage step (see figure 6 of AMD 1 of IEC 60270 for parameters definition)
Approved on 12 April 2021
Institute service identifier : 74
High voltage and current , Electric discharge: apparent charge : 0.1 pC to 0.2 pC
Partial discharge calibrator: apparent charge q
Relative expanded uncertainty : 5.0E1 mC/C
Comparison with analogue integrator
Approved on 12 April 2021
Institute service identifier : 75
High voltage and current , High AC current: ratio: phase displacement : 0 mrad to 20 mrad
Current transformer
Absolute expanded uncertainty : 0.11 mrad
Comparison with reference standard
Primary current : 0.01 A to 8 kA
Secondary current : 0.01 A to 10 A
Frequency : 50 Hz, 60 Hz
According to IEC 61869-2
Approved on 07 February 2019
Institute service identifier : LCOE/72
High voltage and current , Impulse voltage and current: lightning impulse front time : 0.8 µs to 2 µs
High voltage divider, high voltage measuring system, EMC surge generator
Relative expanded uncertainty : 2.0E-2 ms/s to 3.0E-2 ms/s
{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 kV to 600 kV","col_2":"2.0E-2"},"row_3":{"col_1":"600 kV to 700 kV","col_2":"3.0E-2"}}
Comparison with high voltage reference measuring system
Impulse shape : according to IEC 60060-1; 1 kV to 700 kV
According to IEC 60060-2.
Approved on 07 February 2019
Institute service identifier : LCOE/68
High voltage and current , Impulse voltage and current: lightning impulse time to half value : 40 µs to 60 µs
High voltage divider, high voltage measuring system, EMC surge generator
Relative expanded uncertainty : 1.0E-2 ms/s
Comparison with high voltage reference measuring system
Impulse shape : according to IEC 60060-1; 1 kV to 700 kV
According to IEC 60060-2.
Approved on 07 February 2019
Institute service identifier : LCOE/69

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