Megger MVC1010 Voltage Clamp - CAT IV 600V rated
Megger MVC1010 is designed for measurements of AC currents up to 1000 A with a 1000:1 step-down ratio.
The MVC1010 is used as a voltage transformer and is designed to work with compatible Megger earth testing products only. The secondary winding is driven by an AC waveform with a suitable peak value, usually as high as possible, but low enough not to activate the built-in overvoltage protection circuit.
The MVC1010 has a ratio of 1000:1 so that the voltage induced in a primary wire/cable will be 1000 times lower than the voltage driving the secondary coil. This reduced primary voltage drives current in the loop under test. The value of the current will be directly proportional to the loop impedance according to Ohm’s law.
Megger MVC1010 Key Features:
- Excellent accuracy (0.3% error at full range)
- Offer small phase shift (0.7° at full range) perfect for metering of power, energy and power quality applications
- CAT IV 600 V current measurement to 1000 A AC
- 1 mA/1 A sensitivity with rated burden of 1 Ω
- Large jaws for cables up to 52 mm
- Overvoltage protection of the output terminals
- Suitable for leakage currents
Such high performance is achieved because the magnetic cores are made from high-permeability FeNi alloy. The output terminals are protected with a voltage limiting circuit ensuring a safe-to-touch voltage under all rated conditions.
Megger MVC1010 Applications:
- Power quality analysers
- Oscilloscopes
- Motor testers
- Clamp enabled earth testers
- Attached Rod Technique (ART)
- Stakeless testing
- Data loggers
- Digital multimeters
MCC1010 and MVC1010 are rated to CATIV 600 V, according the international standard IEC 61010.
What is the difference between the Megger MCC1010 vs MVC1010?
The Megger MCC1010 and MVC1010 are both current sensing clamps designed for use with Megger earth testers and other instruments like power quality analysers, oscilloscopes, and multimeters. While they share many characteristics, their primary function is slightly different, especially when used together for specific tests.
Device Comparison:
Megger MCC1010 (Current Clamp)
- Function: Primarily a current clamp. It’s designed to measure AC currents up to 1000A with a 1000:1 step-down ratio. It effectively acts as a current transformer.
- Purpose: Measures AC current, including leakage currents. Useful for power, energy, and power quality applications.
- Role in Earth Testing: When used for resistance measurements (like Attached Rod Technique - ART or Stakeless testing), it induces a current through the conductor.
Megger MVC1010 (Voltage Clamp)
- Function: Also a current sensing clamp, often referred to as a voltage clamp in earth resistance testing. Measures AC currents up to 1000A.
- Purpose: Measures AC current.
- Role in Earth Testing: Used with the MCC1010 to measure the voltage drop across the conductor being energized. Enables non-contact resistance measurements.
Key Similarities:
- Current Measurement Range: 1mA to 1000A (AC)
- Accuracy: ≤0.3% at full range
- Phase Shift: ≤0.7˚ at full range
- Step-Down Ratio: 1000:1
- Core Material: High-permeability FeNi alloy magnetic cores
- Jaw Size: Up to 52mm conductor diameter
- Safety Rating: CAT IV 600V (IEC 61010) with voltage limiting circuit
- Compatibility: Works with Megger earth testers (DET3TC, DET4TC, DET4TCR) and other instruments
- Applications: Suitable for Attached Rod Technique (ART) and Stakeless testing
Summary:
While both clamps are capable of measuring current, their distinction arises when used together in earth resistance testing:
- MCC1010: Induces the current.
- MVC1010: Measures the resulting voltage drop.
Used in tandem, they enable non-contact resistance measurement with Megger earth testers.
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