M500

Programmable Standard Current Transformer

Programmable Standard Current Transformer M500 and primary current Range Extender M500E1 represents a new generation of programmable reference transformers developed for automated current transformer calibration systems.

Key features of the M500 include high current ratio accuracy, achieved through active compensation of the residual magnetic flux in the transformer core, and flexible current ratio selection via PC software or the front-panel rotary encoder.

Current ratio switching is performed by highly reliable electromechanical switches, ensuring excellent long-term reliability and repeatability

Description

FEATURES AND BENEFITS

Definitive reference current transformer for current transformer calibration in accordance with IEC 61869 and IEEE C57.13
High accuracy (ratio error ±0,005% and phase displacement Δφ ±0,5 min)
Active residual magnetic flux compensation for exceptional ratio accuracy and long-term stability
Wide primary current range from 0,5 A to 5000 A with a constant 5 A rated secondary current
Flexible current ratio selection via PC software or the front-panel rotary encoder
Highly reliable electromechanical switching minimizes manual cable reconnections
Automatic overcurrent protection to prevent damage during overload conditions
Compact size and low weight for easy transportation and laboratory integration
Long-term stability and excellent repeatability
Seamless integration with automated current transformer calibration systems

VERSIONS

M500 Transformers are available in three versions:

M500.1
M500.2
M500.3

The M500 Transformer set of any modification may include the M500E1 Range Extender

APPLICATIONS

Programmable Standard Current Transformer M500 is used by:

Manufacturers of Current Transformers
On-site testing of Current Transformers
Calibration laboratories
Metrology institutes

Technical specification

Version	M500.1	M500.2	M500.3
Current range, %	1…120	1…150	1…150
M500 Rated primary current, A	0,5; 1; 1,5; 2; 2,5; 3; 4; 5; 7,5; 10; 15; 20; 25; 30; 40; 50; 60; 75; 80; 100; 125; 150; 200; 250; 300; 400; 500; 600	0,5; 1; 1,25; 1,5; 2; 2,5; 3; 4; 5; 6; 7,5; 10; 12,5; 15; 20; 25; 30; 40; 50; 60; 75; 80; 100; 125; 135; 150; 175; 200; 250; 300; 350; 400; 500; 600	0,5; 0,6; 0,7; 0,75; 0,8; 0,9; 1; 1,25; 1,5; 2; 2,5; 3; 3,5; 4; 4,5; 5; 5,5; 6; 6,5; 7; 7,5; 8; 8,5; 9; 9,5; 10; 12,5; 15; 20; 25; 30; 35; 40; 45; 50; 55; 60; 65; 70; 75; 80; 85; 90; 95; 100; 105; 110; 115; 120; 125; 130; 135; 140; 145; 150; 155; 160; 165; 170; 175; 180; 185; 190; 195; 200; 225; 250; 275; 300; 325; 350; 375; 400; 425; 450; 475; 500; 525; 550; 575; 600
M500 + M500E1 Rated primary current, A	750; 800; 1000; 1200; 1250; 1500; 1600; 2000; 2400; 2500; 3000; 4000; 5000	750; 800; 1000; 1200; 1250; 1500; 1600; 1800; 2000; 2400; 2500; 3000; 3200; 3500; 4000; 5000*	650; 700; 750; 800; 850; 900; 950; 1000; 1050; 1100; 1150; 1200; 1250; 1300; 1350; 1400; 1450; 1500; 1550; 1600; 1650; 1700; 1750; 1800; 1850; 1900; 1950; 2000; 2100; 2200; 2250; 2300; 2400; 2500; 2600; 2700; 2750; 2800; 2900; 3000; 3100; 3200; 3300; 3400; 3500; 3600; 3700; 3800; 3900; 4000; 4100; 4200; 4300; 4400; 4500; 4600; 4700; 4800; 4900; 5000
Rated secondary current, A	5
Burden power, VA	≤5
Ratio error, %	±0,005
Phase displacement Δφ, min	±0,5
* Values are possible for 1 to 120 % of rated current
Power mains Rated voltage Rated frequency	220/230 V 50 Hz
Operating temperature	0...40 °C
Relative humidity	up to 80 % non-condensing
Size M500 M500E1	470 × 150 × 390 mm 115 × 355 × 225 mm
Weight M500 M500E1	17 kg 7 kg
Standards Safety EMC	EN 61010-1:2010 EN 61326-1:2013