Instrument transformer is a general term for voltage transformers and current transformers that are used with electrical instruments. The main purpose of instrument transformers is to extend the measurement range for electrical quantities (voltage, current, power, power factor) on large-current and high-voltage circuits. They serve to convert currents and voltages to levels that are suitable for measurement, and to insulate the instrument, etc. from high-voltage circuitry. YOKOGAWA makes a variety of standard instrument transformers. These include the top class (Class 0.1) current transformer 2243, the Class 0.2 6600V circuit instrument voltage transformer 2262, the 6600V current transformer 2242, instrument voltage transformer 2261, and current transformer 2241.

Specifications – Model 2241 00

Conversion Type
Current

Current
0.5 ~ 1500 A

Primary
10/15/30/50/100/ 250/300/500/750/1500A

Secondary
5A

Rated Load
15 VA

Relative Error
± 0.2%

Phase Angle
± 10 minutes

Class
JIS C 1731 : 1997 Class 0.2

Maximum Circuit Voltage
3450 V

Withstand Voltage
10000 V

Rated Frequency
50 ~ 60 Hz

Approx. External Dimension
318 × 246 × 128 mm

Approx. External Weight
9 kg

Features

Precision conversion of electrical quantities on AC large-current or high-voltage circuits
Secondary circuit is isolated from primary circuit.
Capable of wide-range measurement using numerous ranges

Specifications – Model 2242 00

Conversion Type
Current

Current
0.5 ~ 1500 A

Primary
10/15/30/50/100/ 250/300/500/750/1500A

Secondary
5A

Rated Load
15 VA

Relative Error
± 0.2%

Phase Angle
± 10 minutes

Class
JIS C 1731 : 1997 Class 0.2

Maximum Circuit Voltage
6900 V

Withstand Voltage
16000 V

Rated Frequency
50 ~ 60 Hz

Approx. External Dimension
349 × 267 × 152 mm

Approx. External Weight
11 kg

Features

Precision conversion of electrical quantities on AC large-current or high-voltage circuits
Secondary circuit is isolated from primary circuit.
Capable of wide-range measurement using numerous ranges

Specifications – Model 2243 00

Conversion Type
Current

Current
0.5 ~ 1500 A

Primary
0.5/0.75/1/1.5/2/ 3/5/7.5/10/15/20/30/50/75/100A

Secondary
5A

Rated Load
15 VA

Relative Error
± 0.1%

Phase Angle
± 5 minutes

Class
JIS C 1731 : 1997 Class 0.1

Maximum Circuit Voltage
250 V

Withstand Voltage
2000 V

Rated Frequency
50 ~ 60 Hz

Approx. External Dimension
343 × 256 × 136 mm

Approx. External Weight
12.5 kg

Features

Precision conversion of electrical quantities on AC large-current or high-voltage circuits
Secondary circuit is isolated from primary circuit.
Capable of wide-range measurement using numerous ranges

Specifications – Model 2261 01

Conversion Type
Voltage

Voltage
15 ~ 6600 V

Primary
220/440/2200/3300V

Secondary
110V

Rated Load
15 VA

Relative Error
± 0.2%

Phase Angle
± 10 minutes

Class
JIS C 1731 : 1997 Class 0.2

Withstand Voltage
10000 V

Rated Frequency
50 ~ 60 Hz

Approx. External Dimension
255 × 240 × 200 mm

Approx. External Weight
18 kg

Features

Precision conversion of electrical quantities on AC large-current or high-voltage circuits
Secondary circuit is isolated from primary circuit.
Capable of wide-range measurement using numerous ranges

Specifications – Model 2262 00

Conversion Type
Voltage

Voltage
15 ~ 6600 V

Primary
3300/6600V

Secondary
110V

Rated Load
15 VA

Relative Error
± 0.2%

Phase Angle
± 10 minutes

Class
JIS C 1731 : 1997 Class 0.2

Withstand Voltage
16000 V

Rated Frequency
50 ~ 60 Hz

Approx. External Dimension
294 × 240 × 200 mm

Approx. External Weight
18 kg

Features

Precision conversion of electrical quantities on AC large-current or high-voltage circuits
Secondary circuit is isolated from primary circuit.
Capable of wide-range measurement using numerous ranges

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