Energy
19 columns
1,200 rows
8 formats

Insulator Leakage Current and Corona Detection

This dataset provides comprehensive monitoring records for electrical insulators, including leakage current measurements, corona detection results, flashover event tracking, contamination assessments (ESDD/NSDD), and detailed maintenance actions. It supports predictive maintenance, reliability analysis, and asset management for power transmission infrastructure.

last updated 1 Nov 2025
by GoMask

The brief that made it

Predictive maintenance and reliability analysis of power grid insulators

Sample rows

preview · 8 of 1,200 rows · all 19 columns

insulator_idstring	contamination_levelstring	leakage_current_rmsfloat	flashover_eventboolean	corona_detection_methodstring	location_namestring	location_latitudefloat	location_longitudefloat	inspection_datedate	leakage_current_peakfloat	corona_detectedboolean	flashover_datedate	esdd_valuefloat	nsdd_valuefloat	maintenance_actionstring	maintenance_datedate	insulator_typestring	insulator_modelstring	remarksstring
IN-0001	low	0.12	false	none	Coastal Substation Alpha - North	37.7765	-122.4242	2024-04-02	0.21	false	blank	0.08	0.05	none	blank	porcelain	PR-AlphaX	Routine check, minimal contamination observed. No maintenance required.
IN-0002	medium	1.87	false	none	Mountain Ridge Line Segment 14	46.123	7.4321	2024-04-04	2.05	false	blank	1.45	0.98	none	blank	glass	GL-MountPro	Medium contamination level, no corona detected, no events recorded.
IN-0003	low	0.03	false	none	Urban Distribution Block 7	40.7128	-74.006	2024-04-05	0.09	false	blank	0.01	0.01	none	blank	polymer	PL-UrbLite	Inspection revealed no significant contamination. All values within normal range.
IN-0004	low	0.18	false	none	Desert Transmission Tower 22	33.4484	-112.074	2024-04-07	0.27	false	blank	0.05	0.03	none	blank	glass	GL-DesertX	Dry conditions, minimal contamination, no events detected.
IN-0005	high	14.9	false	ultraviolet	Industrial Zone High Voltage A	51.5074	-0.1278	2024-04-10	16.1	true	blank	7.3	5.4	washed	2024-04-11	porcelain	PR-IndusV	High contamination; preventive washing performed post inspection.
IN-0006	low	0	false	none	Remote Outpost Test Site 1	-89.9999	179.9999	2024-04-14	0	false	blank	0	0	none	blank	other	EX-TestZero	Boundary edge case; zero values for robustness testing.
IN-0007	critical	28.7	true	both	Coastal Marine Line 18	58.1234	-4.3211	2024-04-16	34	true	2024-04-15	18.6	14.2	replaced	2024-04-16	other	PL-MarineMax	Flashover event at coastal site, insulator replaced due to critical contamination.
IN-0008	medium	2.93	false	none	Urban Grid Section 5	34.0522	-118.2437	2024-04-18	3.65	false	blank	1.62	1.04	none	blank	polymer	PL-UrbanX	Medium contamination, all readings within safe operational range.
IN-0009	critical	25.4	true	both	Rainforest Transmission G-12	-3.4653	-62.2159	2024-04-20	27.6	true	2024-04-19	17.9	13.7	replaced	2024-04-20	other	EX-TropiTest	Critical contamination in rainforest region; flashover event necessitated replacement.
IN-0010	high	13.7	false	acoustic	Industrial Plant Line 3	39.9526	-75.1652	2024-04-21	17	true	blank	6.8	4.1	washed	2024-04-22	glass	GL-InduMax	High contamination detected, scheduled washing to prevent flashover.
IN-0011	low	0.17	false	none	Coastal Wind Farm Tower 2	52.2053	0.1218	2024-04-23	0.23	false	blank	0.03	0.05	none	blank	polymer	PL-WindSafe	Coastal wind exposure, minimal contamination, no maintenance needed.
IN-0012	low	0.57	false	none	City Center Distribution 19	48.8566	2.3522	2024-04-25	1.01	false	blank	0.43	0.3	none	blank	porcelain	PR-CityLite	Urban environment; low salt deposit density, no events.
IN-0013	medium	8.31	false	none	Industrial Outskirts HV-9	55.9533	-3.1883	2024-04-27	9.85	false	blank	2.7	3.1	none	blank	glass	GL-Outskirt	Medium contamination, industrial exposure, preventive monitoring.
IN-0014	low	0.38	false	none	Remote Valley Tower 20	-12.4634	130.8456	2024-04-29	0.55	false	blank	0.12	0.09	none	blank	other	EX-ValleyTest	Low contamination, remote valley tower, test case.
IN-0015	high	11.2	false	acoustic	Industrial Coastal Segment 3	-33.8688	151.2093	2024-05-01	13.8	true	blank	5.9	4.5	washed	2024-05-02	porcelain	PR-CoastX	High contamination, preventive washing performed, no flashover event.
IN-0016	low	0.02	false	none	Urban Test Facility T-01	0.0001	0.0001	2024-05-03	0.03	false	blank	0.01	0	none	blank	other	EX-TestMini	Edge case, minimal readings for boundary testing.
IN-0017	low	0.65	false	none	Hilltop Transmission Line 47	47.6062	-122.3321	2024-05-06	1.14	false	blank	0.51	0.38	none	blank	porcelain	PR-HillMax	Routine inspection, readings within expected range.
IN-0018	critical	35.5	true	both	R&D Prototype Tower B	66.5011	179.9999	2024-05-08	41	true	2024-05-07	25.3	19.8	replaced	2024-05-08	other	EX-ProtoX	Prototype insulator tested under extreme conditions, flashover event occurred.
IN-0019	medium	1.24	false	none	Rural Distribution Line E-12	41.8781	-87.6298	2024-05-10	1.57	false	blank	1.02	0.77	none	blank	polymer	PL-RuralMax	Medium contamination, no events, polymer insulator performing well.
IN-0020	high	10.8	false	ultraviolet	Wetlands Transmission Tower 5	29.7604	-95.3698	2024-05-12	12.3	true	blank	5.1	3.9	washed	2024-05-13	glass	GL-WetGuard	Wetlands location with high contamination, maintenance completed.

What the 1,200 rows show

from the 1,200-row sample

Critical (contamination level) stands out: 173 of its 173 rows have flashover_event = true, against 7 of 1,027 for the rest.

15%flashover_event = true
2.5median leakage_current_rms
3maintenance actions
4insulator types
3.2median leakage_current_peak
1.1median esdd_value

Flashover event rate by contamination_levelflashover_event = true

Critical (contamination level)'s mean leakage_current_rms is 24.3, against 0.55 for low, 3.5 for medium and 11.2 for high.

leakage_current_rms1,200 rows, in bands of 5

Median 2.5, from 0.0 to 35.5.

corona_detection_method1,200 rows · 4 values

none797
both173
ultraviolet127
acoustic103

19 columns by typefrom the column list below

string 8
float 6
date 3
boolean 2

Columns

19 columns in four groups

blueprint · 19 columns
column	type	description	example
Text 8 columns
`insulator_id`	string	Unique identifier for each insulator being monitoredunique	IN-0001
`location_name`	string	Name or description of the insulator's location (e.g., substation, line segment)	Coastal Marine Line 18
`corona_detection_method`	string	Method used for corona detection (acoustic, ultraviolet, both, none)acoustic · ultraviolet · both · none · optional	none
`contamination_level`	string	Categorized contamination level (e.g., low, medium, high, critical)low · medium · high · critical · optional	low
`maintenance_action`	string	Type of maintenance performed (none, washed, replaced)none · washed · replaced · optional	none
`insulator_type`	string	Type of insulator (e.g., porcelain, glass, polymer)porcelain · glass · polymer · other · optional	porcelain
`insulator_model`	string	Manufacturer model or specification of the insulatoroptional	PR-AlphaX
`remarks`	string	Additional notes or observations from inspectionoptional	Clean, no events.
Numbers 6 columns
`location_latitude`	float	Latitude coordinate of the insulator's location-90 to 90 · optional	37.7765
`location_longitude`	float	Longitude coordinate of the insulator's location-180 to 180 · optional	-122.4242
`leakage_current_rms`	float	Measured RMS value of leakage current (in mA or A)0 or more	0.12
`leakage_current_peak`	float	Measured peak value of leakage current (in mA or A)0 or more · optional	0.21
`esdd_value`	float	Equivalent Salt Deposit Density (ESDD) measured on the insulator (mg/cm²)0 or more · optional	0.08
`nsdd_value`	float	Non-Soluble Deposit Density (NSDD) measured on the insulator (mg/cm²)0 or more · optional	0.05
Dates and times 3 columns
`inspection_date`	date	Date when the insulator was inspected or monitored	2024-04-02
`flashover_date`	date	Date of most recent flashover event (if any)optional	2024-04-15
`maintenance_date`	date	Date when maintenance action was performedoptional	2024-04-11
True or false 2 columns
`corona_detected`	boolean	Indicates if corona discharge was detected during inspection	false
`flashover_event`	boolean	Indicates if a flashover event was recorded since last inspectionoptional	false

Use it for

An energy dashboard
The flashover_event rate, leakage_current_rms by contamination_level and a breakdown of corona_detection_method. Excel, Power BI or Tableau.
Why do 180 of 1,200 rows have flashover_event = true?
A root-cause class exercise
Hand out the rows and one question. The answer is in the data, not in the brief.
Insulators1,200
IN-00010.12low
IN-000728.7critical
IN-000925.4critical
A software demo
Believable insulators with location_name, location_latitude and location_longitude to fill a screen in front of a buyer.

This dataset1,200 rows19 columns

Yours1,000 rows19 columnslocation_name: UK only

blueprint · insulator-leakage-current-and-corona-detection

Behind this dataset

Same schema. As many rows as you need.

These 1,200 rows came out of a blueprint — 19 columns with generation rules behind each one. Open it in Data Factory to retune a column, add your own, wire in foreign keys, and run it at the size you actually need.

Rules it was built with

Insulator string ID, type (porcelain, polymer, glass), and voltage class
Leakage current measurement (milliamps) under wet/contaminated conditions
Corona detection: acoustic signature (dB) or UV imaging
Surface contamination: ESDD (equivalent salt deposit density) mg/cm²
Flashover events: arcing across insulator surface, outage caused
Insulator washing cycle: deionized water, high-pressure cleaning
Polymer insulator hydrophobicity and erosion assessment
Replacement criteria: visible damage, flashover history, contamination severity

Rows1,000 rows10,000 rows100,000 rows1,000,000 rows

Open the blueprint in Data Factory

1 credit per row. Preview 20 rows free. Buy rows for the full run.

Exports: CSV, JSON, JSONL, Parquet, SQL, Excel, TSV, XML
Licence: yours to use, including commercially
API slug: insulator-leakage-current-and-corona-detection

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Sample rows

What the 1,200 rows show

Columns

Use it for

An energy dashboard

A root-cause class exercise

A software demo

Make it yours.

Same schema. As many rows as you need.

More in Energy

What should your data show?