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Ⅰ.INTRODUCTION
Click to download: MEWOI248,248B Super-large Caliber Clamp AC Current Sensor User Manual
MEWOI248，MEWOI248B Super-large Caliber Clamp Current Sensor is well designed and manufactured for measurement of AC current, higher harmonic current, phase, electric energy, power and power factor, by adopting the latest CT technology. Its large caliber 148mm×108mm can clamp electric cable of Φ108mm, or 160mm×4mm flat cable and steel earth wires. It is portable, clamp designed, no need to disconnect the circuit, non-contact measurement, which means safer and faster. It can be connected with phase detection analyzer, industrial control equipment, data recorder, oscilloscope, electric power quality analyzer, high precision multi-meter, widely applied in those fields as electricity, communications, meteorology, railroad, oilfield, construction, measurement, scientific & research teaching institutes, industrial and mining establishments. The clamp is made of special alloy, adopt the latest CT and magnetic shielding techniques, can almost shield the influence from external magnetic field, to ensure the high precision, high stability and high reliability of perennial uninterrupted measurement |
SELECTION GUIDE
| Model | Range | Resolution | Coils Turn | Shield | Notes |
| MEWOI248 | 0.mA～3000A | 0.1mA | 1：3000 | Yes | Strong anti-interference ability and more suitable for leakage current test |
| MEWOI248B | 0.0A～4000A | 0.1A | 1：3000 | No | Suitable for large current testing |
TECHNICAL SPECIFICATION
| Function | Measurement of AC current, higher harmonic current, phase, electric energy, power and power factor |
| Test mode | Clamp CT |
| Clamp Size | 148mm×108mm |
| Range | AC 0.0mA-3000A |
| Resolution | AC 0.1mA |
| Accuracy | ±2.0%FS (50Hz/60Hz; 23℃±2℃, below 70%RH, keep the measured wire be in the center of the clamp) |
| Coils Turn | 3000: 1 |
| Phase Error | ≤3°(50Hz/60Hz; 23℃±2℃) |
| Reference Load | RL: 0-300mA≤3kΩ; 0-30A≤30Ω; 0-4000A≤0.3Ω |
| Output Mode | Current induction output |
| Output Interface | 2 bare wires or standard multi-meter pen plug |
| Output Wire Length | 2m |
| Electric Field Interference | About 5mA when the external electric field 100A, 10mm nearby |
| Measured Wire Position | Approximately in the geometric center of the clamp |
| Current Frequency | 45H-60Hz(when measuring big current) |
| Frequency Feature | 10Hz~100kHz |
| Voltage of circuit | Below AC 600V |
| Dimension | 350mm×180mm×55mm |
| Weight | 1.5Kg |
| Working Environment | -20℃ ~ 50℃; below 80%rh |
| Storage Environment | -10℃ ~60℃; below 70%rh |
| Insulation Strength | AC 3700V/rms.(between coil and shell) |
| Safety Rules | IEC1010-1, IEC1010-2-032, 2 class of pollution, CAT Ⅲ(600V) |