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Field Testing & Twin SaaS
🇬🇧 Full UI + PDF + National Standard Mapping: UI + PDF in English. Normative references follow international IEC 60364, BS 7671:2018+A2:2022, IEEE, and NFPA 70E/70B.
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#30MV Switchgear, VCB/SF6 Breaker & MV Cable VLF Test Report

Project Framework (report reference): IEC 60364-4-41Applicable Standard: IEC 62271-100 / IEC 62271-200 / IEEE 400.2
Module Field Guides, Standard Selection & Tutorials (3)Browse All 93+ Guides →
1 · Field Measurement ProcedureHow to Measure & Test MV Switchgear & VCB/VLF on Site: Step-by-Step Field Procedure (IEC 62271-100 / IEC 62271-200 / IEEE 400.2)2 · Standards & Limit TablesWhich Standard Applies to MV Switchgear & VCB/VLF? Acceptance Limits, Annex Tables & Regional Equivalents (IEC 62271-100 / IEC 62271-200 / IEEE 400.2)3 · OhmCert Tutorial & Case StudyHow to Complete a MV Switchgear & VCB/VLF Certificate in OhmCert: Worked Case Study & Troubleshooting

Multi-Asset / Multi-Point Equipment Schedule

Inspect multiple transformers, panels, rooms, motors, or RCDs in this module without overwriting previous assets. Each item receives a permanent QR Sticker UID preserved across annual audits.

Sticker UID: OC-MVS0-DDE9
Plant & SLD (Auto-SLD)

Standard Limits, Equations & Space Presets

IEC 62271-100 (AC circuit-breakers), IEC 62271-200 (metal-enclosed MV switchgear), ANSI/NETA ATS §7.6, and IEEE 400.2-2013 (0.1 Hz VLF cable tan-delta) govern commissioning and periodic maintenance of 6.3 kV - 36 kV substations.

One-Click Normative Presets (Auto-fills Target Limits)

Measured Inputs

Calculated / Evaluated Results

Evaluates Medium Voltage (3.3 kV - 36 kV) metal-enclosed switchgear cubicles, Vacuum / SF6 circuit breakers, and MV XLPE cables: 100 A DC 4-wire contact resistance & inter-pole spread (<= 50%), opening/closing timing & 3-pole simultaneity (<= 2.0 ms), 5 kV DC pole insulation, and 0.1 Hz VLF tan-delta cable dielectric assessment.

Pending / Not tested — results stay neutral until valid measured values are entered.

  • Max Main Contact Resistance (4-Wire >= 100 A DC)

    -

    Not tested - enter the measured value. Acceptance: R_contact <= OEM limit and inter-pole deviation <= 50% of lowest pole [IEC 62271-100 §6.4 / ANSI/NETA ATS §7.6.3]

    Pending

  • Circuit Breaker Opening Time (Max of L1 / L2 / L3)

    - ms

    Not tested - enter the measured value. Acceptance: Opening time <= 60 ms (3-cycle MV breaker window; verify against OEM test sheet) [IEC 62271-100]

    Pending

  • 3-Pole Opening Simultaneity (Pole Discrepancy Delta-t)

    - ms

    Not tested - enter the measured value. Acceptance: Delta-t_open <= 2.0 ms across L1, L2, L3 poles (IEC max 1/6 cycle = 3.33 ms) [IEC 62271-100 §5.102.2 / NETA ATS]

    Pending

  • Circuit Breaker Closing Time

    - ms

    Not tested - enter the measured value. Acceptance: Closing time <= 80 ms and anti-pumping O-0.3s-CO duty verified [IEC 62271-100]

    Pending

  • 5 kV DC Main Pole-to-Earth & Open-Contact Insulation

    - MOhm

    Not tested - enter the measured value. Acceptance: IR >= 1,000 MOhm (1.0 GOhm) at 5 kV DC for MV switchgear assemblies [ANSI/NETA ATS Table 100.1 / IEC 62271-200]

    Pending

  • MV Service-Aged XLPE Cable 0.1 Hz VLF Tan-Delta (at Uo)

    -

    Not tested - enter the measured value. Acceptance: Mean VLF 0.1 Hz tan-delta <= 4.0 x 10^-3 for service-aged XLPE cable ('No Action Required' band) [IEEE Std 400.2-2013 Table 4]

    Pending

Verification Checklist (0 / 12)

Pending

  • 1MV cubicle Internal Arc Classification (IAC AFL / AFLR, e.g. 20 kA 1 s) verified and arc pressure relief duct unobstructed [IEC 62271-200 Annex AA]

  • 2Mechanical/key interlocks (Castell / Fortress) strictly prevent opening cable compartment door unless Earth Switch is CLOSED and Disconnector is OPEN

  • 3Capacitive Voltage Presence Indicating System (VPIS - IEC 62271-206) healthy on all 3 phases L1/L2/L3 before earthing

  • 4Vacuum interrupter dielectric integrity (AC Hi-Pot bottle check) or SF6 gas pressure / density relay lockout & alarm contacts verified

  • 5Breaker spring-charging motor, manual charging handle, mechanical O/I counter, and anti-pumping relay verified

  • 6Dual trip coils (TC1 / TC2), closing coil, and undervoltage release tested at minimum auxiliary DC voltage (70% Un trip / 85% Un close) [IEC 62271-100]

  • 7Withdrawable VCB truck tulip finger contacts cleaned, silver-plated surfaces free of pitting, and lubricated per OEM manual

  • 8Automatic metallic safety shutters close positively and lock over live busbar spouts when breaker truck is racked to TEST/REMOVED

  • 9Post insulators, epoxy bushings, CT/VT cast-resin surfaces free of partial-discharge white powder, treeing, or corona ozone odor (TEV/ultrasonic check)

  • 10MV XLPE cable terminations, stress-control cones, and copper screen earthing braids properly routed through core-balance CTs (back-passed through CBCT!)

  • 11Cubicle anti-condensation space heaters and hygrostat/thermostat verified functional via clamp ammeter

  • 12Substation insulating floor mat (IEC 61111 Class 3/4), rescue hook, MV live-line voltage detector, and arc-flash switching PPE present

General Notes

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Free plan: 5 of 5 inspections / calculations left this month.