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Megger DET4TC2-KIT Contractor Series Earth/Ground Resistance Tester is available at EquipTestPro.com with fast shipping and great prices.
Features
Stakeless (Clamp-on) Testing
The DET4TC and DET4TCR2 include stakeless, or clamp-on testing capability. In effect, these models can be operated in the same way as a clamp-on ground under test and drive test probes un certain ground system testing applications. this method is also useful when there us insufficient space to perform a classic fall-of-potential measurement. In addition the units can be used to measure ground leakage or phase current.
the user simply clamps the optional ICLAMP and VCLAMP around the ground under the test in the manner prescribed in the operator's manual and takes the reading. A defined test voltage is injected into the system using the VCLAMP, including a current, I, to flow and be measured by the ICLAMP. The instrument then calculates the approximate resistance of the ground under test.
The stakeless method is subject tot the same limitations faced by the traditional clamp-on ground tester. It is effective only in situations where multiple grounds in parallel and cannot be proofed like a fall-of-potential test. In situations where the stakeless method reading is questionable, a full fall-of potential test is recommended. The advantage of the DET4TC2 and DET4TCR2 is that the units include both test methods in a single instrument, making them the worst versatile units available.
Applications
Proper grounding provides many varied benefits to both people and facilities. It lessens the chance of injury due to faulty installation, reduces the likelihood of damage from lightning strikes and induced voltages, improves the performance of a computer, communication and other sensitive equipment and protects against static electricity from friction. Over time, ground systems can degrade or become ineffective. Corrosion and weather influences exert mechanical strain on ground rods and cause metallic corrosion. Catastrophic events like lightning strikes or large fault currents can cause instant degradation. In addition, soil resistivity can change over time due to environment damage, disruption in the performance of sensitive equipment and heat build-up on a single piece of electrical equipment.
The risks from ground system deterioration include potentially deadly electrical shock situations, plant-wide equipment damage, disruption in the performance of sensitivity equipment and heat build-up on a single piece of electrical equipment.
The maintenance of an adequate low resistance ground connection is essential to both the protection and performance of any electrical system. Ground testing should be performed both upon installation, to meet design specification, and periodically thereafter in order to maintain service. All Megger models can also perform bonding tests (using an AC signal), to determine that adequate connection has been made from equipment to the grounding system, and can perform soil resistivity tests. This additional function can be used in prospecting, locating, and designing new grounding electrodes and systems. Furthermore, the addition of built-in current clamp capability enables fall of potential testing of attached grounds (ART) without lifting the utility connection and the addition of voltage clamp technology enables stakeless testing from the same instrument.
Grounding electrodes from simple to complex systems can be tested, including:
| Resistance range | 0.01Ω to 200kΩ auto ranging |
| Analog model | 2.5% of scale length |
| Digital models | 2P measurements 2% ±3 digits, 3P measurements 2% ±3 digits, 4P measurements 2% ±3 digits, ART measurements 5% ±3 digits, Stakeless measurements 7% ±3 digits |
| Maximum probe resistance | Rp limit: 100k½ (50V output voltage), Rc limit: 100k½ (50V output voltage), Limits reduced to 50k½ for 25V output voltage, Limits reduced to 5k½ for 0.01 ½ resolution |
| Earth voltage range | 0-100V |
| Earth voltage accuracy | 2% ±2 V |
| 2-wire test | Yes, all models |
| 3-wire test | yes, all models |
| 4-wire test | DET4TD, DET4TC2, DET4TCR2 |
| Ground current range (with current measuring clamp) | 0.5mA to 19.9A |
| Ground current accuracy | 5% ±3 digits |
| Display | LCD (moving coil meter for analog model) |
| Test frequency | 128 Hz |
| Test voltage | 25 V or 50 V, user selectable (factory setting 50 V) |
| Test current | 450 micro-amps at 25 V or 50 V (selectable), 4.5mA at 25 V |
| Noise rejection | 40V pk to pk |
| Battery type | 8 1.5 V AA cells |
| Battery life | 3 hours, 700 consecutive tests |
| Safety | EN61010-1 CAT IV 100 V |
| Dimensions | 8 x 5.7 x 3.2 in. (203 x 148 x 78 mm) |
| Weight | 2.2 lb (1 kg) |
Shop EquipTestPro.com for the best deals on Megger DET4TC2-KIT Contractor Series Earth/Ground Resistance Tester. Fast shipping, competitive pricing, and expert support. Visit equiptestpro.com today!
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