EDN-500

Reference-class resistive voltage divider

Accuracy class: 0.005

EDN-500 is a reference voltage divider which produces an output voltage by dividing the AC voltage on its input by a selected division factor.

Purpose

The divider can be applied for accuracy testing (calibration, verification) of:

	Low power electronic voltage transformers manufactured in compliance with IEC 60044-7-2010
	Energy meters
	Power and voltage converters

Examples of tested transformers

Application

The divider is a high-precision component of a test system typically installed in an industrial or metrological lab and used for testing, calibration, or verification of measuring instruments.

The divider can be used as part of:

	PCS-ME 3.0 (secondary standard of AC power)
	TTS-ME 61850 (transformer test system for calibration of digital transformers)
	Transformer test systems for calibration of low power electronic transformers manufactured according to IEC 60044-7-2010

Accuracy specifications

In the mode of testing energy meters, power converters, and voltage converters

Voltage measurement range	Measurement error in the frequency range 40 … 70 Hz		Measurement error in the frequency range 0 ... 1000 Hz
Voltage measurement range	Ratio	Angle	Ratio	Angle
16 ... 480 V	0.005 %	0.2 min	0.02 %	0.2·(f/50) min

In the mode of testing low power electronic voltage transformers

Rated input voltage	Rated output voltage of the programmable amplifier^*	Measurement error
		Ratio	Phase
60 V	30 mV ... 8 V	0.01 %	0.5 min

^*A number of output voltages can be pre-selected by the customer from a range of 1.625 ... 6.5 V according to IEC 60044-7–2010 (1.625 – 2 – 3.25 – 4 – 6.5 V).