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Megger MTO250 50 A Transformer Ohmmeter
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Description
Megger MTO250 50 A Transformer Ohmmeter
The Megger MTO250 50 A transformer ohmmeter is a field-portable, line-operated tool engineered for precisely measuring the resistance of various magnetic windings, including transformers, shunt reactors, and rotating machinery. It is designed to conduct safe and accurate tests and can also measure low resistance in connections, contacts, and control circuits.
The MTO250 transformer ohmmeter features two potential inputs that allow for simultaneous resistance measurement of two primary windings, two secondary windings, or one of each. This capability of dual reading and injection streamlines the testing process, making it significantly more efficient.
Megger MTO250 Key Features
- Capable of testing transformers up to 1000 MVA
- DC test current up to 50 A maximum
- Integrated demagnetisation feature
- Computer control and internal data storage
- Validates proper operation of on-load tap changers
- Protected against accidental current lead disconnection (through potential leads)
Megger MTO250 Specifications
| Specification | Details |
|---|---|
| Input | 85-264 VAC, 47-63 Hz, 1500 VA |
| Output Current Ranges | 1 A / 10 A / 25 A / 50 A |
| Open Circuit Voltage | 50 V DC |
| Resistance and Current Measurement/Display | |
| 50 A | 10 µΩ to 0.04 Ω, Resolution: 0.0000001 Ω |
| 0.04 Ω to 0.4 Ω, Resolution: 0.00001 Ω | |
| 25 A | 10 µΩ to 0.08 Ω, Resolution: 0.0000001 Ω |
| 0.08 Ω to 0.8 Ω, Resolution: 0.00001 Ω | |
| 10 A | 10 µΩ to 0.2 Ω, Resolution: 0.000001 Ω |
| 0.2 Ω to 2 Ω, Resolution: 0.0001 Ω | |
| 1 A | 100 µΩ to 2 Ω, Resolution: 0.00001 Ω |
| 2 Ω to 20 Ω, Resolution: 0.001 Ω | |
| Accuracy and Resolution | Typical Accuracy: ±0.1%, Guaranteed Accuracy: ±0.25% |
| Current Resolution and Accuracy | 4 digits, ±0.25% |
| Computer Interface | Via Ethernet port |
| Internal Data Storage | 9 groups, 99 results per group |
| LTC Make-Break Transition Settings | 2 ms, 20 ms, 50 ms, 80 ms |
| Safety/EMC/Vibration | Conforms to EN61010-1, ISTA 1A, EN61326 |
| Environmental | Operating: -10°C to 50°C, Storage: -25°C to 70°C, Humidity: 0-90% RH |
| Dimensions and Weight | 8.5 x 21.5 x 13 inches, Unit: 30 lb, Optional leads: 29 lb, In case: 96 lb |
Datasheet
Datasheet
Specifications
Specifications
| Specification | Details |
|---|---|
| Input | 85-264 VAC, 47-63 Hz, 1500 VA |
| Output Current Ranges | 1 A / 10 A / 25 A / 50 A |
| Open Circuit Voltage | 50 V DC |
| Resistance and Current Measurement/Display | |
| 50 A | 10 µΩ to 0.04 Ω, Resolution: 0.0000001 Ω |
| 0.04 Ω to 0.4 Ω, Resolution: 0.00001 Ω | |
| 25 A | 10 µΩ to 0.08 Ω, Resolution: 0.0000001 Ω |
| 0.08 Ω to 0.8 Ω, Resolution: 0.00001 Ω | |
| 10 A | 10 µΩ to 0.2 Ω, Resolution: 0.000001 Ω |
| 0.2 Ω to 2 Ω, Resolution: 0.0001 Ω | |
| 1 A | 100 µΩ to 2 Ω, Resolution: 0.00001 Ω |
| 2 Ω to 20 Ω, Resolution: 0.001 Ω | |
| Accuracy and Resolution | Typical Accuracy: ±0.1%, Guaranteed Accuracy: ±0.25% |
| Current Resolution and Accuracy | 4 digits, ±0.25% |
| Computer Interface | Via Ethernet port |
| Internal Data Storage | 9 groups, 99 results per group |
| LTC Make-Break Transition Settings | 2 ms, 20 ms, 50 ms, 80 ms |
| Safety/EMC/Vibration | Conforms to EN61010-1, ISTA 1A, EN61326 |
| Environmental | Operating: -10°C to 50°C, Storage: -25°C to 70°C, Humidity: 0-90% RH |
| Dimensions and Weight | 8.5 x 21.5 x 13 inches, Unit: 30 lb, Optional leads: 29 lb, In case: 96 lb |
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