AC1040 • 40 Amp Current Transformer Low Cost 50/60Hz Current Transformers Applications • Sensing Overload Current • Ground fault detection • Metering • Analog to Digital Circuits

• Competitive pricing due to high volume production • Manufactured in an ISO-9001:2000, TS-16949:2002 and ISO-14001:2004 certified Talema facility • Fully RoHS compliant

Electrical Specifications @ 20°C ambient E lectrical S p ecificatio n s Primary Current 40A nom., 125A max. Turns Ratio 1000:1 nominal Volt per Amp Ratio at 40A for 100 ohm load 0.100 V/A Volt per Amp Ratio at 4A for 100 ohm load 0.098 V/A DC Resistance at 20°C 49.3 ohms Dielectric Withstanding Voltage (Hi-pot) 4KVrms Mechanical Specifications

E n viro n men tal S p ecificatio n s

Polycarbonate Epoxy Conforms to UL94-VO Pins Ø 1.0mm

Marking

TALEMA Date Code (W/Y) AC1040, Dot at start pin

Approximate Weight Tolerance

Storage Temperature Insulation Resistance

10000

47.3 grams ±0.2mm

Output Volts vs Input Current For various ohmic loads

100

1000

100

10 0

200

2K

400

600

800

Percent ratio error in %

1K

Typical Excitation Curve (AC1040~AC1050)

10 500 100

200 100

1 50

0.1 10

100 Input Current in Amps

Dimensions

10

1

0.1

14.30

34.90

Sec RMS Exciting Voltage in Volts

Output Voltage in Volts

Infinity 10K 5K

-55° to +130°C 100 megohms min.

%RE vs RL at Rated primary current (AC1040)

Load Resistance RL in ohms

C a se Encapsulant Flammibility Terminals

0.01

0.1

1

10

34.90

Sec RMS Exciting Current in mA

TALEMA INDIA W/Y AC1040

5±1mm

Ø14.60

2

3 25.40

1

Ø 1.016

Notes: 1) Unless requested, the terminating resistor and the one-turn primary are not supplied 2) Pin 3: Normally for mechanical support only but will be used on center tapped designs

2.08

1 10.16

I - Turn Primary

40A

3 40mA

RL

1/4W 4.0V 100 ohms

2

Germany: Int.+49 89 - 841 00-0 • Ireland: Int.+35 374 - 954 8666 • Czech Rep: Int.+420 377 - 338 351 • India: Int.+91 427 - 244 1325 http://www.talema-nuvotem.com (06-06)CT’s\AC1040