WN-KT8C — PdM

Overall Risk Score

● MEDIUM

Risk Score / 100 · evaluated 2026-06-03 14:10

Score Breakdown & Weighted Formula

35% weight Rule-Based · IEC 90

25% weight DGA Diagnostics 45

20% weight Statistical Z-Score 33

20% weight Isolation Forest 0

Rule-Based · IEC 90 × 0.35 = 31.5

DGA Diagnostics 45 × 0.25 = 11.2

Statistical Z-Score 33 × 0.20 = 6.7

Isolation Forest 0 × 0.20 = 0.0

Score = Rule×0.35 + DGA×0.25 + Stat×0.20 + IF×0.20
= 49.4 → MEDIUM

Action Required

🟡 MEDIUM

Increase monitoring frequency

⏱ within 30 day(s)

NORMAL (0–20)routine

LOW (20–40)schedule

MEDIUM (40–60)inspect ↑

HIGH (60–80)repair 7d

CRITICAL (80+)stop now!

Rule Alerts

CRITICAL alerts

WARNING alerts

DGA Diagnostics

fault type(s)

DGA severity

ML & Statistical

Z-Score component

Isolation Forest

Overall Assessment

🟡

MEDIUM

act within 30d

Open Alerts (2)

Detected	Method	Severity	Message
05-02 05:00	rule	CRITICAL	HYDROGEN-H2 PHASE A (PPM): 760.0 — Partial discharge in oil
05-02 05:00	dga	MEDIUM	DGA fault PD: Partial discharge (corona)

IEC Rules Catalog (reference)

Parameter	Unit	Warn	Critical	Standard
HYDROGEN-H2	ppm	100	700	IEC 60599
METHANE-CH4	ppm	120	400	IEC 60599
ETHYLENE-C2H4	ppm	50	200	IEC 60599
ACETYLENE-C2H2	ppm	3	35	IEC 60599
CARBON MONOXIDE-CO	ppm	350	900	IEEE C57.104
MOISTURE-H2O	ppm	10	30	IEC 60422
TOP OIL TEMP	°C	85	105	IEC 60076-7
WINDING TEMP	°C	98	120	IEC 60076-2
AMBIENT TEMP	°C	40	50	IEC 60076-2
OLTC OIL TEMP	°C	80	100	IEC 60214-1
BOTTOM OIL TEMP	°C	75	95	IEC 60076-7

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