Services

Instruments

You can be confident that our instruments will perform, because we use them ourselves every day. We know which factors are important in quality instruments, and have thoroughly field-tested every device. Safearth instruments are not products of ‘spec sheet’ engineering — they’re based on real world experience.

We understand the gap between prototype devices and commercial products. Our instruments only become fully-fledged products when they’re absolutely ready and reliable. Safearth has a strong focus on iterative development and prototyping, because rapid prototyping and early field testing leads to better, more robust, products.

We’re not just an instrument shop or another instrument supplier. Building a relationship with you is important to us. We can even develop instruments to meet your own particular needs (grounding related or otherwise).

Condition Testing

Testing the conditioning your grounding system is an essential routine step in ensuring your grounding system will perform appropriately when it is relied upon.

Continuity testing, or integrity testing, is one of the best indicators of the physical condition of the grounding system. It is used to measure whether items that should be connected to the grounding system are effectively bonded, and can quickly identify such problems as corroded connections, loose bolts, inadvertent connections or separations.

CS3 Grounding System Integrity Tester

The difference between an effective and ineffective grounding connection could be as small as a few mΩ. A 1kA fault through a 10mΩ joint results in 10kW of heat, which could immediately destroy the connection, and result in an extremely hazardous scenario.

If you want to verify the integrity of electrical connections across a large distance, or in a noisy environment such as a live substation, this instrument is for you. It is ideal for routine testing and maintenance, and can identify defects before they fail under fault conditions.

The CS3 is a milli-ohmmeter, but with a number of advanced additional features that have been developed especially for the particular requirements of grounding system integrity testing. It gives you previously unachievable insight into the condition of your assets, and you can test without needing to take assets out of service.

Features:
  • Accurate measurements across large distances
  • Ability to measure multiple joints at a time
  • Up to 4x faster than traditional integrity testing methods
  • Accurate enough to identify a single loose connection
  • High noise rejection

Find out more

Performance Testing

Injection testing is the most informative way of testing grounding system performance and safety. It aims to assess the actual performance of the grounding system by replicating a real fault (at a small scale) and measuring the effects. To achieve this, a circuit is established between the grounding system under test and a remote injection point. Ideally this circuit should reflect the actual fault supply circuit, which often requires an outage. If this is not feasible, post testing analysis is necessary to reflect the actual fault scenario.

AX1 Injection Source

Testing grounding system performance, including touch, step and transferred voltages, has never been more effective. This high power, frequency-selectable injection unit is unmatched in its ability to enable testing of live, energized stations under the most arduous conditions, without having to remove any grounding interconnections.

The AX1 provides highly stable frequency-tunable current for testing GPR, touch/step voltages, grid resistance and fault current distribution.

Features:
  • Modern, efficient inverter technology
  • GPS referenced frequency and phase control
  • Highly stable for reliable test results
  • Stations remain live – no deengergization required
  • Grounding system remains intact during testing
  • Unsurpassed noise immunity

MI3 Injection Multimeter

Measuring touch, step and transfer voltages of substation grounding systems as part of a current injection test is a key indicator of the hazard level of an installation. And measuring current distribution is critical to gain insight into system performance. The MI3 provides fast and accurate voltage and current measurement.

The MI3 provides fast and accurate voltage and current measurement during injection testing.

Features:
  • Voltage and current measurement
  • Frequency-tunable with advanced filtering
  • GPS referenced phase measurements
  • Lightweight with long battery life
  • High immunity to power system noise
  • Fast, automatic range selection