Voltage Measurement Divider

Product Specifications

Technical details and manufacturing context for Voltage Measurement Divider

Definition

The Voltage Measurement Divider is a precision component used in high-voltage test systems. It consists of a calibrated network of high-precision resistors or capacitors that attenuate a high input voltage to a safe, low-level output voltage, which can be accurately measured by standard instruments. This ensures operator safety and protects sensitive measurement equipment from damage. The divider is designed for use in electrical equipment manufacturing, particularly in high-voltage testing applications. Key specifications include a rated voltage range of 10–1000 kV, a voltage ratio from 1000:1 to 10000:1, and an accuracy class of 0.1–1.0% per IEC 60044-5. The temperature coefficient ranges from ±10 to ±50 ppm/°C, and the operating temperature range is -40 to 85°C. The divider can operate in non-condensing relative humidity up to 95%. Insulation resistance is at least 1000 MΩ at 500 V DC test voltage, and dielectric strength is 1.5–3.0 kV/mm, both per IEC 60243-1. Total resistance ranges from 100 to 10000 MΩ, with a tolerance of ±0.1–±1.0%. Rated power dissipation is 0.5–5 W, and weight ranges from 5 to 50 kg. For outdoor use, the IP rating is IP54–IP65 per IEC 60529. Materials include high-voltage ceramic resistors, high-dielectric-strength insulation (e.g., epoxy, silicone), and metal terminals/connectors. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The Voltage Measurement Divider operates on the principle of voltage division. A high-voltage input is applied across a series of high-impedance, high-voltage-rated resistors (or capacitors). The voltage across a specific, lower-value resistor in the series is a known, precise fraction of the total input voltage. This reduced voltage is then measured, and the original high voltage is calculated by applying the known division ratio. The divider ensures accurate measurement while isolating the measuring instrument from the high potential.

Common Materials

High-voltage ceramic resistors, High-dielectric-strength insulation (e.g., epoxy, silicone), Metal terminals/connectors

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Voltage	10–1000 kV	Maximum continuous operating voltageIEC 60044-5
Voltage Ratio	1000:1–10000:1	Select based on measurement range
Accuracy Class	0.1–1.0 %	Lower is better for precisionIEC 60044-5
Temperature Coefficient	±10–±50 ppm/°C	Affects accuracy over temperature
Operating Temperature	-40–85 °C	Outside range may degrade performance
Relative Humidity	0–95 %	Non-condensing
Insulation Resistance	≥1000 MΩ	At 500 V DC test voltageIEC 60243-1
Dielectric Strength	1.5–3.0 kV/mm	Material dependentIEC 60243-1
Resistance Range	100–10000 MΩ	Total divider resistance
Tolerance	±0.1–±1.0 %	Resistance matching accuracy
Rated Power	0.5–5 W	Continuous power dissipation
Weight	5–50 kg	Depends on voltage rating
IP Rating	IP54–IP65	For outdoor useIEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

High-Voltage Resistor Network
Provides the primary voltage division and withstands the high input potential.

Material: High-voltage ceramic or metal oxide film
Low-Voltage Tap Resistor Part
Provides the precise, low-voltage output for measurement.

Material: Precision metal film
Insulating Housing Part
Encapsulates the resistive elements, provides electrical insulation, and protects against environmental factors.

Material: Epoxy resin or high-grade polymer
High-Voltage Terminal Part
Connection point for the high-voltage input from the test unit.

Material: Stainless steel or brass
Low-Voltage Output Terminal Part
Connection point for the attenuated output signal to the measurement instrument.

Material: Gold-plated brass
Divider Capacitor Optional
The capacitive version of the divider stack, used for AC and impulse measurement.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

High-Voltage Test Unit

View system integration details

Manufacturers of Voltage Measurement Divider

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Frequently Asked Questions

What is the purpose of a voltage measurement divider?

It safely reduces high voltages to a lower, measurable level, protecting instruments and operators.

What are the key specifications to consider?

Rated voltage, voltage ratio, accuracy class, temperature coefficient, insulation resistance, and dielectric strength.

How do I verify the accuracy of the divider?

Check the accuracy class per IEC 60044-5 and confirm with the manufacturer's calibration data.

What maintenance is required?

Regular inspection of insulation and connections, and periodic recalibration as per manufacturer guidelines.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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voltage:	Up to 1000V DC/AC peak
accuracy:	±0.1% typical
temperature:	-40°C to +85°C
frequency range:	DC to 1MHz

Product Specifications

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