Three Phase Measurement Test System ll METES 325

Description

Three Phase Measurement Test System ll METES 325

METES 325 – Specifications and Testing Functions

The METES 325 is a versatile electrical measurement and calibration instrument designed for accurate testing of energy meters, electrical power parameters, transformers, and current measurement systems. Its advanced measurement functions, touchscreen interface, onboard database, and SmartProbe compatibility make it suitable for field service, calibration, commissioning, and maintenance applications.

Specifications

• Accuracy: 0.05%
• Voltage Range (Direct Connection): Standard: 65, 110, 230, and 300 V AC; other ranges available on request
• Current Range (Direct Connection): Standard: 0.02, 0.1, 1, 2, 5, and 10 A AC; other ranges available on request
• Frequency Range (Fundamental): 45–65 Hz
• Auxiliary Supply: 18–24 V DC
• Display: 480 × 800, 7-inch TFT touchscreen
• Housing: Rugged ABS case

Energy Meter Calibration

The METES 325 can be used to calibrate energy and maximum-demand functions of energy meters, including:

• Reactive energy calibration for true-varmetric and cross-connected energy meters
• Demand calibration for vectorial and arithmetic demand meters

Phasor Diagram

The instrument provides a clear phasor diagram showing three-phase voltage and current signals. This helps users analyze phase relationships and identify irregularities in electrical systems.

Harmonic Analysis

The METES 325 provides detailed harmonic analysis functions, including:

• Bar-graph display of voltage and current harmonics up to the 32nd harmonic
• Total harmonic distortion (THD) measurement for voltage and current on each phase
• Oscilloscope display of voltage and current waveforms for each phase

Transformer Testing

When used with optional SmartProbes, the METES 325 can perform a range of voltage and current transformer tests, including:

• Wireless HV current transformer ratio testing
• LV current transformer ratio testing
• Current transformer burden measurement
• Voltage transformer burden measurement
• Voltage transformer voltage-drop measurement

Onboard Database

Saving Test Results

All test results can be stored in the built-in database of the METES 325. This allows measurement and calibration data to be accessed later for review, downloading, or printing.

Search Function

The integrated search function enables field technicians to quickly locate previously saved sites, test records, and calibration results directly from the instrument.

Instantaneous Measurements

The METES 325 provides real-time measurement of important electrical parameters, including:

• Voltage and current values with individual phase angles
• Watt (W), var, VA, and power factor for each phase
• Three-phase power measurements
• Frequency

Power Diagram

A four-quadrant power diagram provides a graphical representation of active power (P), reactive power (Q), and apparent power (S), helping users analyze power flow and system behavior.

SmartProbe Technology

The METES 325 supports KoCoS SmartProbe technology with a range of external sensors. SmartProbes are designed with ratio and phase-error compensation across their complete measurement range, providing accurate measurements for a variety of testing applications.

SP 10D

• Range: 0.1, 1, and 10 A
• Miniature clip-on current sensors with ratio and phase correction curves
• Suitable for secondary current transformer testing
• Maximum Conductor Diameter: 8 mm
• Accuracy: 0.2%

SP 100D

• Range: 1, 10, and 100 A
• Clip-on current sensors with ratio and phase correction curves
• Maximum Conductor Diameter: 15 mm
• Accuracy: 0.2%

SP 1000FLD

• Range: 100, 300, and 1000 A
• Flexible Rogowski current sensor with ratio and phase correction curves
• Maximum Conductor Diameter: 150 mm
• Accuracy: 0.5%

SP 2000FLD

• Range: 200, 600, and 2000 A
• Flexible Rogowski current sensor with ratio and phase correction curves
• Maximum Conductor Diameter: 150 mm
• Accuracy: 0.5%

SP 3000FLD

• Range: 300, 1000, and 3000 A
• Flexible Rogowski current sensor with ratio and phase correction curves
• Maximum Conductor Diameter: 150 mm
• Accuracy: 0.5%