The KCDB - the BIPM key comparison database – supports the CIPM MRA. The KCDB contains information on the internationally recognized Calibration and Measurement Capabilities (CMCs) for services available from the participating institutes, and the key and supplementary comparisons supporting these CMCs.

All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
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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**

Uncertainty table

{"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 ,
High DC voltage: ratios
:
**1.00E-6 to 1**

DC high voltage dividers, DC high voltage probes

Relative expanded uncertainty
:
**5.0E-5 to 1.0E-4**

Uncertainty table

{"row_1":{"col_1":"Voltage (kV)","col_2":"Expanded uncertainty (dimensionless)"},"row_2":{"col_1":"1 kV","col_2":"50 E-6"},"row_3":{"col_1":"1 kV to 100 kV","col_2":"100E-6"}}

100E-06, (50E-06 for 1 kV level)

Comparison with reference divider

Voltage : 1 kV to 100 kV

Approved on 23 June 2022

Institute service identifier : LCOE/61 update

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 ,
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**

Uncertainty table

{"row_1":{"col_1":"% I<sub>R</sub>","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 % ≤ I<sub>R</sub> < 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>"}}

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 ,
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 voltage: voltage transformer ratio error
:
**0 to 0.02**

Voltage transformer, voltage divider

Absolute expanded uncertainty
:
**8.0E-5 to 1.0E-4**

Uncertainty table

{"row_1":{"col_1":"","col_2":"Expanded uncertainty"},"row_2":{"col_1":"1 kV to 60 kV","col_2":"80E-06"},"row_3":{"col_1":"60 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 23 June 2022

Institute service identifier : LCOE/65 update

High voltage and current ,
High AC voltage: voltage transformer phase displacement
:
**0 crad to 2 crad**

Voltage transformer, voltage divider

Absolute expanded uncertainty
:
**8.7E-3 crad to 1.2E-2 crad**

Uncertainty table

{"row_1":{"col_1":"<br>","col_2":"1 kV to 60 kV","col_3":"60 kV to 500 kV"},"row_2":{"col_1":"1E-06 crad to 2 crad","col_2":"0.0087","col_3":"0.012"}}

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 23 June 2022

Institute service identifier : LCOE/66 update

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**

Uncertainty table

{"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

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

Acoustics, Ultrasound, Vibration

This metrology area covers the fields of acoustics, ultrasound and vibration.

Electricity and Magnetism

This metrology area covers the fields of DC and AC measurements, impedance, electric and magnetic fields, radiofrequencies and measurements on materials.

Length

This metrology area covers the fields of laser frequencies and dimensional metrology.

Mass and related quantities

This metrology area covers the fields of mass standards, force, pressure, density, hardness, torque, gravity and viscosity.

Chemistry and Biology

This metrology area covers all fields relevant to chemistry and biology.

Ionizing Radiation

This metrology area covers the fields of dosimetry, radioactivity and neutron measurements.

_{R}= rated current of the current transformer to be calibrated.