Megger 550005B
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$3.970
Megger 550005B, Portable hand-cranked transformer turns ratio tester with 0.001–129.99 range, analog display, and no power needed — ideal for on-site transformer diagnostics.
Megger 550005B – Hand-Cranked Transformer Turns Ratio (TTR) Test Set
The Megger 550005B is a rugged and portable single-phase Transformer Turns Ratio (TTR) test set specifically designed to measure turns ratio and excitation current in power, current, and potential transformers. Powered by a hand-cranked generator, this unit requires no batteries or external power, making it a highly reliable field instrument for remote locations and off-grid transformer testing.
Ideal for utility technicians and electrical engineers, the Megger 550005B allows manual range selection with its analog display and delivers precise ratio measurements from 0.001 to 129.99, or up to 329.99 with an auxiliary transformer (optional). It can also be used for three-phase transformers by testing each phase individually.
🔧 Key Features:
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Measures turns ratio from 0.001 to 129.99 (or 329.99 with optional transformer)
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Excitation current range: 0 to 1 A
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Hand-cranked operation — no power supply needed
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Analog meter with manual range selection
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Suitable for testing single-phase and three-phase transformers (phase-by-phase)
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Exceptionally accurate: ±0.1%
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Includes C-clamps and spring clips for HV and LV windings
📦 What’s in the Box:
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Cable assembly
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2x C-Clamps for low-voltage windings (10 ft / 3 m)
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2x Spring clips for high-voltage windings (13 ft / 4 m)
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Operating manual
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📐 Technical Specifications:
| Parameter | Value |
|---|---|
| Turns Ratio Range | 0.001 to 129.999 (up to 329.99 optional) |
| Excitation Current | 0 to 1 A |
| Accuracy | ±0.1% |
| Output Voltage | 8 V, 50/60 Hz |
| Display | Analog meter with 4-decade dials |
| Power Source | Hand-cranked generator |
| Dimensions | 7.5 × 14 × 12 in (189 × 353 × 302 mm) |
| Weight | 16 lb (7.3 kg) |
| Country of Origin | United States |
The Megger 550005B TTR Test Set is a dependable tool for on-site power and distribution transformer testing. Its battery-free operation, precise measurements, and durable build make it perfect for utilities, substations, and service providers who need consistent performance in any field condition.
