Transformer & Insulating Fluid Test

Complete Transformer, Relay, and Insulating Oil Test Program

Transformer and electrical apparatus test equipment, combined with insulating oil and fluid analysis instruments, covers the full range of tests needed to qualify and maintain transformers and other power apparatus over their service life.

This range spans transformer turns ratio, SFRA, and DC resistance testing, CT/PT analyzers for protection system commissioning, SF6 gas quality testing for GIS equipment, protection relay test sets, and the complete insulating oil test suite covering dielectric strength, moisture content, acid number, interfacial tension, and flash point.

MEWOI601 Oil Dielectric Loss Tester — Transformer & Insulating Fluid Test

Insulating Oil — Dielectric & Chemistry Testing

Chemical and dielectric property testing for transformer oil condition monitoring.

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Model	Key Specification
MEWOI Insulation Oil Dielectric Loss Tester	Tan delta, permittivity, IEC 60247	View
MEWOI401	Karl Fischer titration trace moisture, IEC 60814	View
MEWOI301	Interfacial tension, ASTM D971, IEC 60422	View
MEWOI703	Acid number, IEC 60296, ASTM D974	View

Insulating Oil — Dielectric Strength (BDV) Testing

Breakdown voltage testing per IEC 60156, single or multi-cup for higher throughput.

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Model	Key Specification
MEWOI803	3 simultaneous test cups, IEC 60156	Enquire
MEWOI Single Cup Dielectric Strength Tester	Single cup BDV, IEC 60156	Enquire

Flash Point Testing

Cleveland Open Cup flash point testing to ASTM D92 for insulating oil safety assessment.

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Model	Key Specification
MEWOI502K	K-type thermocouple, ASTM D92	Enquire
MEWOI501B	Cleveland Open Cup, ASTM D92	Enquire

Transformer Winding & Turns Ratio Testing

Winding resistance, turns ratio, and general contact resistance measurement for transformers and switchgear.

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Model	Key Specification
MEWOI4670	10A DC, waterproof, built-in printer	Enquire
MEWOI4660	10A DC, winding resistance μΩ–Ω	Enquire
MEWOI Transformer Turn Ratio Tester	Turns ratio, polarity, IEC 60076	View
MEWOI Contact Resistance Tester	Contact resistance in μΩ, 100A+ injection	View

SFRA & Impedance Testing

Detects mechanical deformation and verifies CT/PT accuracy through frequency response and ratio analysis.

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Model	Key Specification
MEWOI SFRA/LV Short-Circuit Tester	SFRA and LV short-circuit impedance	View
MEWOI CT PT Analyzer	Ratio, polarity, knee-point, saturation	View

SF6 Gas Testing

Moisture and leak detection for SF6-insulated switchgear per IEC 60376.

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Model	Key Specification
MEWOI SF6 Dewpoint Detector	SF6 gas moisture, IEC 60376	View
MEWOI SF6 Leak Detector	SF6 concentration and leak rate	View

Phase & Relay Testing

Phase sequence, phase angle, and multi-phase protection relay testing for substation commissioning.

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Model	Key Specification
MEWOI Phase Detector	Three-phase rotation/sequence detection	View
MEWOI Digital Phase Meter	Phase angle between V/I signals	View
MEWOI 3-Phase/6-Phase Relay Test Set	Overcurrent, distance, differential, earth fault	View

Protection & Safety Device Testing

Verifies RCD/leakage protection devices and capacitance in power capacitors, bushings, and HV equipment.

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Model	Key Specification
MEWOI RCD/Leakage Protector Tester	IEC 61008, IEC 61009	View
MEWOI Capacitance Tester	Power capacitors, bushings, HV equipment	View

Field Accessories

Non-contact ultrasonic measurement of overhead cable height and clearance.

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Model	Key Specification
MEWOI Ultrasonic Cable Height Meter	Overhead cable height/clearance	View

Transformer & Insulating Fluid Test

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