Spécification Ohmstik Plus

Product catalog summary

Overview
The Ohmstik Plus is a live line micro-ohmmeter designed to measure micro-ohm resistance on high voltage (HV) conductors, capable of handling up to 1400 Amps and providing accurate readings in environments up to 500kV. It is used to reduce connector failure rates by evaluating line splices, bolted terminals, taps, jumpers, and substation bus bars.

Features

Measures and holds up to nine sets of readings.
Provides accurate data for calculating ratios to determine the health of splices or fittings.
Resistance is calculated by measuring AC amperage and voltage drop between contacts.
Not affected by factors that cause infrared errors, such as emissivity and weather.
Predicts potential failures, allowing for planned replacements.

Applications

Measurement and evaluation of connections on transmission and distribution conductors.
Verification of resistance on closed switch contacts.
Checking taps and jumpers for connection reliability.
Evaluation of aging connections.

Specifications

Model Numbers: 6-082 (Ohmstik Plus Kit), 6-084 (Wide Jaw Ohmstik Plus Kit).
Sensor Opening: 2.5 in (6.35 cm) for standard, 3.86 in (9.8 cm) for wide jaw.
Weight: 2.4 lbs (1.10 kg) for standard, 4.0 lbs (1.81 kg) for wide jaw.
Frequency: 47 to 53 Hz (50 Hz), 57 to 63 Hz (60 Hz).
Range of Operation: Voltage Phase to Phase 90VAC - 500 kV, True RMS Amps 1-1400 A, Micro-Ohms 5-2500 μΩ.
Resolution: Amps 0.1 A (0.9-99.9 A), 1 A (100-1400 A); Micro-Ohms 1 μΩ (1-999), 1.0 μΩ (1000-2500).
Accuracy: Current ± 1% ± 1 A, Micro-Ohms Absolute ± 2%, ± 2 μΩ, Repeatability ± 1%, ± 2 μΩ.
Operating Temperature: -22° to +140° F (-30 to +60° C), lithium battery required below -4°F (-20°C).
Display: Graphics Display, Controls: Single button operation.
Battery: 9V Alkaline or Lithium, one per unit.

Standards and Compliance

Successfully passed international test standards indicated by CE.

Catalog excerpts

OHMSTIK PLUS FEATURES Measure micro-ohm resistance on HV conductors Measure up to 1400 Amps Accurate readings in environments up to 500kV Measure and hold up to nine sets of readings LIVE LINE MICRO-OHMMETER REDUCE CONNECTOR FAILURE RATES The Ohmstik Plus takes accurate current and micro-ohm measurements from conductors, connectors, splices, and switching devices when placed directly on the energized asset. The Ohmstik Plus is used to evaluate line splices, bolted terminals, taps, jumpers, and substation bus bars. Additionally, switches, fused disconnects, and normally open switches that have been open for long periods, may be measured just after closing. These connections can be measured right after installation, or surveyed after years of service. The instrument is positioned onto the splice or connector so the connection under test is between the two electrodes. In a few seconds both amperage and micro-ohm measurements are taken and displayed on the front panel LCD. The Ohmstik Plus is designed to store up to nine sets of readings. The ability to hold multiple readings ends the need to lower the instrument to eye level after each measurement. The readings taken provide accurate data for calculating ratios to determine health of the splice or fitting. Resistance is calculated by measuring the AC amperage in the line and the voltage drop between both contacts. The AC current in the line assures realistic current distributions through the connection are being measured. This measurement is more direct than infrared thermography and is not subject to emmissivity, weather, current loading, background or other influences that cause infrared errors. The Ohmstik Plus gives utility engineers data to predict a failure years in advance, allowing for replacement on a planned basis, before failures and line drops occur. Ohmstik and 12” Probe

Open the catalog to page 1