#11 - Ground Bonding Resistance Testing

⚡ Ground Bonding Resistance Testing

The purpose of ground bonding is simple:
👉 to ensure that in the event of a fault, hazardous current can safely flow to earth.

Why is this necessary?
👉 To ensure the safety of operators and end users!

How do we know our ground bonding solutions work properly?
👉 They must be measured and tested — but how we do it is crucial!

The challenge?
👉 The resistance to be measured is often in the milliohm range.
In this range, every contact and cable matters.

Key points to keep in mind:

🔹 High test current is required
 ⤷ In the ampere or even 10-ampere range, so that a measurable voltage drop develops on very low resistances.

🔹 Contact resistance can distort the measurement
 ⤷ Poor connections can degrade the measurement and damage the instrument.

🔹 Two-wire measurement is not sufficient
 ⤷ 4-wire (Kelvin) measurement is recommended.

🔹 Instrument protection and safety shutdown are essential
 ⤷ Due to the high current, the system must be prepared for fault conditions.

🔹 Measurement error may be comparable to the value being measured
 ⤷ Every single milliohm counts.

❗ Measuring is not only a technical matter, but a life-safety concern.

ProDSP grounding test solutions are robust, fast, and automatable even in industrial environments. If you have questions, feel free to reach out — and follow us for more content. 🤝

Download GroundBonding.pdf