Sonel MIC-10K1

DESCRIPTION

The Sonel MIC-10k1 Insulation Resistance Meter is a 10kV insulation tester designed to test and maintain high-voltage electrical equipment. It is capable of standard insulation resistance tests, plus various diagnostic tests such as polarisation index, dielectric absorption ratio, step voltage and dielectric discharge.

Standard Accessories: Carry Case, 240V Power Lead, 3 x 3m Test Leads, 3 x Crocodile Clips, 2 x Test Probes, Manual
Power Supply: Internal rechargeable battery or 230VAC mains supply
Voltage Output: 50-10,000 VDC
Battery Life: 4 Hours of continuous testing
Display: LCD
Test Functions: Insulation Resistance, Polarisation Index, Step Voltage, Dielectric Discharge, Dielectric Absorption Ratio

FEATURES

• Insulation resistance measurement (up to 40 TΩ)
• Measurement voltage – any in the range of 50…10000 V, 50…1000 V with steps of 10 V, 1…10 kV with steps of 25 V
• Continuous indication of measured insulation resistance or leakage current
• Automatic discharge of measured object capacitance voltage after the end of insulation resistance measurement
• Acoustic signalling of 5-second intervals to facilitate capturing time characteristics
• Adjustable measuring time – up to 99’59’’
• T1, T2 and T3 test times for measuring one or two absorption coefficients from the range of 1…600 s
• Polarization index (PI), absorption coefficients Ab1, Ab2 and dielectric absorption ratio (DAR) measurement
• Indication of actual test voltage during measurement
• 1.2 mA, 3 mA or 6 mA test current
• Insulation resistance measurement using two- or three-wire method
• Measurements with test leads up to 20 m
• Protection against measuring live objects
• Measurement of capacitance during the measurement of RISO
• Measurement of temperature (with optional probe ST-1)
• Step voltage insulation resistance measurement (SV)
• Dielectric Discharge calculation (DD)
• Damage location (burnout)
• Digital filters for measurements with strong interferences
• Can work in an environment where electromagnetic interferences of 400 kV occur
• Measurement of DC and AC voltages within the range of 0…750 V

Application

MIC-10k1 meter is designed to measure the insulation resistance of electro-power objects, i.e. single- and multi-core cables, transformers, motors and generators, capacitors, switches and other devices installed in power stations. Furthermore, it is dedicated for measurements in areas with very high electromagnetic disturbances, e.g. electrical substations with 765 kV voltage or higher.

Capabilities

Highly efficient HV inverter, with test voltage of 10 kV and current of 6 mA, suitable for measuring the insulation resistance up to 40 TΩ. Achieving such a result makes these meters unrivalled devices. Three-wire resistance measurement, performed using a "GUARD" wire, eliminates surface leakage currents caused by contaminated insulation, thereby increasing the reliability of obtained results. The meter measures temperature of tested object, which is necessary to determine the temperature correction factor for RISO. In addition, it indicates the absorption coefficient (DAR - Dielectric Absorption Ratio), Polarization Index (PI) and the value of Dielectric Discharge (DD). The device allows user to assess the condition of the insulation, by applying the test voltage incrementally in steps (SV). This solution ensures that a dielectric in good condition will provide the same results, regardless of the applied voltage. Deviations in obtained resistance values of approx. 25%, observed on the chart in the individual steps, may indicate the potential insulation defects. MIC-10k1 has the unique ability to perform measurements on multi-core cables, within one connection step, using the AutoISO-5000 adapter. This solution reduces the duration of measurements on repetitive of objects, such as cables of street lighting systems. Inverter with a power of almost 60 W is able to intensify the point of cable damage, which facilitates finding the location of the fault using a reflectometric method e.g. with TDR-420 device. Built-in digital filters, with averaging time of 10, 30, 60, 100, 200 sec. and "smart" solution guarantee stable measurement results in areas of strong electromagnetic interference.

Data analysis

The device, with its backlight graphical screen may display a waveform of insulation resistance, voltage and current as a function of time. The operator, basing on the trend shown by the waveform, may quickly assess the insulation condition right after starting the measurement. This provides full control over the tested object and clear image of the tested insulation. In addition, with movable tags, the operator may trace the course of the measurement and check resistance values obtained for any time of the current measurement and of measurements made in the past. After installing mobile application, as a part of the set the user receives Sonel Reader software for collecting historical data and comparing it with current results, transferred from the extensive memory of the meter. This solution helps user to prepare a measurements report, track the insulation degradation and plan the maintenance / repair works.

SPECIFICATIONS

Insulation resistance measurement

RISOmin = UISOnom/IISOmax = 50 kΩ…15.0 TΩ (IISOmax =1.2 mA or 3 mA)

“m.v.” - measured value

Values of measured resistance depending on measuring voltage

Capacitance measurement

Temperature measurement