HV Calibration

List of calibrations according DKD accreditation

Measurand	Measuring range	Measuring conditions	Measuring uncertainty	Remarks
DC Low Voltage	350 mV to 1000 V		0,02%	Measuring Instruments HV Measuring Systems DC - Direct Current
DC High Voltage	25 kV to 350 kV 350 kV to 1000 kV		0,4% 1%
AC Low Voltage	1 V to 1000 V	10 Hz to 10 kHz	0,11%	Measuring Instruments HV Measuring Systems AC - Alternating Current
AC High Voltage	25 kV to 200 kV 200 kV to 1200 kV	50 Hz to 150 Hz	0,8% 1,0%
LV Impulse: LI LIC SI	500 V to 1000 V 50 V to 750 V 50 V to 1000 V	According IEC 1083 Load: over 1MOhm, less 50 pF Coaxial cable 1,5 m length	0,6% 0,8% 0,6%	Measuring Instruments LV - Low Voltage
Time parameters: LI: T₁ T₂LIC: T_CSI: T_P T₂	0,84 µs 60 µs 0,5 µs 20 µs 4000 µs		2,0% 2,0% 2,0% 2,0% 2,0%
LV Impulse: LI SI	180 kV to 210 kV 50 kV to 500 kV 500 kV to 180 kV 180 kV to 210 kV 50 kV to 500 kV	According IEC 60	0,6% 0,8% 0,8% 0,6% 0,8%	HV Measuring Systems HV - High Voltage LI - Lightning Impulse LIC - Lightning Impulse Chopped SI - Switching Impulse T_{1 - Front time}T₂ - Tail time T_{C - Chopped time}T_P - Peak time
Time parameters: LI: T₁ T₂SI: T_P T₂	0,8 µs to 1,6 µs 40 µs to 60 µs 200 µs to 300 µs 1000 µs to 4000 µs	According IEC 60	4% 4% 4% 4%
Impulse charge Indication linearity	2 pC to 2000 pC 2 pC to 20 pC 20 pC to 2000 pC	According IEC 270	0,5 pC + 0,03q 0,05q 0,01q	PD Calibrators PD Measuring Devices PD Partial Discharge

High Voltage Calibration Laboratory DKD-K-18702
has the following reference measuring systems and standards:

List of the reference measuring systems and the reference calibrators

Measurand / measuring equipment	Component elements	Type Manufacturer
Direct Current (DC) High Voltage / Reference Measuring System	Voltage Divider Digital Voltmeter	HVD-200-1 Spellman Co. Keithley 2000
Lightning Impulse (LI) and Switching Impulse (SI) High Volatge / Reference Measuring System	Voltage Divider Digital High Voltage Measuring System	SMCR 600/500 Highvolt Co. TR-AS 100-10/3 Dr. Strauss Co.
Alternating Current (AC) High Voltage / Reference Measuring System	Voltage Divider Digital High Voltage Measuring System	SMCR 600/500 Highvolt Co. TR-AS 100-10/3 Dr. Strauss Co.
LI and SI Low Voltage Impulse Charge / Reference Impulse Calibrator	Calibrator	KAL 1000 Dr. Strauss Co.
Impulse Charge / Reference Calibrator	Impulse Charge Generator	LDC-5/R Lemke Diagnostics Co.
DC and AC Low Voltage / Reference Calibrator	Calibrator	5500 A Fluke

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