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ACT-1250 Series Split-Core Current Transformers 250A to 600A

The Accu-CT ACT-1250 series split-core current transformer (CT) offers revenue grade performance with a unique one-handed opening and closing mechanism
Part Number: ACT-1250
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$125.00 ex GST
[$137.50 inc GST]
Product Files

Features:

  • Split-Core Current Transformer
  • Revenue Grade Accuracy
  • Excellent Linearity
  • Very Low Phase Angle Error

All CTs Are Not the Same!

Window Opening 1.25 Inch, 250 to 600 Rated Amps

The Accu-CT ACT-1250 series split-core current transformer (CT) offers revenue grade performance with a unique one-handed opening and closing mechanism. The oval opening can handle a single 750 kcmil (MCM) conductor or two 400 kcmil (MCM) conductors.

  • Safe: burden resistor built-in, 333 mVac voltage output at rated full scale current, no shorting blocks needed
  • IEEE C57.13 and IEC 60044-1 accuracy: over full temperature range and down to 1% of rated current
  • Exceptionally low phase angle error: essential for accurate power and energy measurements
  • Glove-friendly: easy to open and install with one hand while wearing safety gloves
  • Approvals: UL listed, CE mark, RoHS
  • Best low-end accuracy of any split-core CT!

Models

  • List prices for quantity 1 to 30 pieces. Call for pricing on larger quantities.
  • Max Amps is the recommended maximum continuous current. See ACT-1250 Maximum Amps for details.

Standard

ModelRated
Amps
ACT-1250-250 250
ACT-1250-400 400
ACT-1250-600 600

Revenue Grade

ModelRated
Amps
ACT-1250-250 Opt C0.6 250
ACT-1250-400 Opt C0.6 400
ACT-1250-600 Opt C0.6 600

Performance Graphs

  • Graphs show typical performance at 23°C, 60 Hz
  • Graph shows a positive phase angle when the output leads the primary current.

Safety Note

Warning: Hazardous Voltages - Only qualified personnel or licensed electricians should install the WattNode meter and current transformers.

Features:

  • Split-Core Current Transformer
  • Revenue Grade Accuracy
  • Excellent Linearity
  • Very Low Phase Angle Error

All CTs Are Not the Same!

Window Opening 1.25 Inch, 250 to 600 Rated Amps

The Accu-CT ACT-1250 series split-core current transformer (CT) offers revenue grade performance with a unique one-handed opening and closing mechanism. The oval opening can handle a single 750 kcmil (MCM) conductor or two 400 kcmil (MCM) conductors.

  • Safe: burden resistor built-in, 333 mVac voltage output at rated full scale current, no shorting blocks needed
  • IEEE C57.13 and IEC 60044-1 accuracy: over full temperature range and down to 1% of rated current
  • Exceptionally low phase angle error: essential for accurate power and energy measurements
  • Glove-friendly: easy to open and install with one hand while wearing safety gloves
  • Approvals: UL listed, CE mark, RoHS
  • Best low-end accuracy of any split-core CT!

Models

  • List prices for quantity 1 to 30 pieces. Call for pricing on larger quantities.
  • Max Amps is the recommended maximum continuous current. See ACT-1250 Maximum Amps for details.

Standard

ModelRated
Amps
ACT-1250-250 250
ACT-1250-400 400
ACT-1250-600 600

Revenue Grade

ModelRated
Amps
ACT-1250-250 Opt C0.6 250
ACT-1250-400 Opt C0.6 400
ACT-1250-600 Opt C0.6 600

Performance Graphs

  • Graphs show typical performance at 23°C, 60 Hz
  • Graph shows a positive phase angle when the output leads the primary current.

Safety Note

Warning: Hazardous Voltages - Only qualified personnel or licensed electricians should install the WattNode meter and current transformers.

Specifications

Accuracy

The accuracy specifications apply over the full operating temperature range (-30°C to 55°C) unless otherwise noted. Standard models are calibrated for optimum accuracy at 50-60 Hz.

The following accuracy specifications apply to the standard model (no options) or for Option C0.6; the specifications may vary for other options, so see the details on individual options for specifications.

Standard Accuracy

  • Accuracy: ±0.75% from 1% to 120% of rated primary current
  • Phase angle: ±0.50 degrees (30 minutes) from 1% to 120% of rated current
  • IEEE C57.13 accuracy: class 1.2 from 1% to 120% of rated current
  • IEC 60044-1 accuracy: class 1.0 from 1% to 120% of rated current

Revenue Grade Accuracy

With Option C0.6, the Accu-CT is calibrated and verified to meet IEEE/ANSI C57.13-2008 class 0.6 accuracy and IEC 60044-1 class 0.5 S accuracy and each CT is shipped with a certificate of calibration.

  • Accuracy: ±0.50% from 1% to 120% of rated primary current
  • Phase angle: ±0.25 degrees (15 minutes) from 1% to 120% of rated current
  • IEEE C57.13 accuracy: class 0.6 from 1% to 120% of rated current
  • IEC 60044-1 accuracy: class 0.5 and 0.5 S from 1% to 120% of rated current

Electrical

  • Primary rating: 250 to 600 amps nominal
  • Voltage and Measurement Category:
    • 600 Vac, CAT IV (service entrance) for pollution degree 2
    • 250 Vac, CAT III for pollution degree 3
  • Line frequency: 50 to 60 Hz nominal (available for up to 400 Hz)
  • Maximum continuous primary amps: 720 amps
  • Maximum primary conductor gauge: (see Wire Gauges)
    • One 750 kcmil THHN conductor (1.14 inch nominal diameter with insulation)
    • Two 350 kcmil THHN conductors. They must be in close contact to both fit.
  • Output: 333.33 mVac or 1.00 Vac (with Option 1V)
  • Output lead wires:
    • Standard length: 8 ft (2.4 m)
    • Gauge: #18 AWG
    • Type: MTW, UL 1015
    • Voltage: 600 Vac
    • Style: Two conductor: white and black, twisted
  • Internal Burden Resistance: see ACT-1250 Internal Burden Resistance

  • Width: 4.50 inches (114.0 mm)
  • Height: 3.30 inches (83.4 mm)
  • Thickness: 1.58 inches (40.2 mm)
  • Window: 1.83 x 1.26 inches (46.5 x 32.0 mm)
  • Weight: 13.9 oz (395 gm)
  • Material: PC/ABS

Miscellaneous

  • Operating temperature: -30°C to 75°C (–22°F to 167°F)
  • Altitude: up to 3000 m (9840 feet)
  • Operating Humidity: 5 to 95% relative humidity (RH)
  • Pollution Degree:
    • 2 (controlled environment) for CAT IV, 600 Vac
    • 3 (harsh environment) for CAT III, 250 Vac
  • Indoor Use: Suitable for indoor use.
  • Outdoor Use: Suitable for outdoor use when mounted in a NEMA 3R or 4 (IP 66) rated enclosure, provided the ambient temperature will not exceed 75°C (167°F).
  • UL listed: file number E363660 (XOBA), standard UL 2808
  • cUL listed (Canada): file number E363660 (XOBA7), standard CAN/CSA C22.2 No. 61010-1
  • CE mark: pending
  • RoHS
  • Assembled in USA
  • Label barcode: QR Code, "Model ; SerialNum"

Options

Opt C0.6

With Option C0.6, the Accu-CT meets IEEE/ANSI C57.13-2008 class 0.6 accuracy and IEC 60044-1 class 0.5 and class 0.5 S accuracy from -30°C to 55°C and from 1% to 120% of rated primary current (see CT Accuracy Standards).

  • Accuracy improves to ±0.5% from 1% to 120% of rated primary current from -30°C to 55°C.
  • Phase angle improves to ±0.25 degrees from 1% to 120% of rated primary current from -30°C to 55°C.
  • Includes a certificate of calibration
    • Order option C0.6,N if you need the C0.6 accuracy, but do not need a certificate of calibration.

Opt 50Hz

The ACT-1250 series of transformers are not available with a 50 Hz option, because it is not needed. The standard models (including Opt C0.6) meet the accuracy specifications over the full range from 50 to 60 Hz.

Opt FT

The Accu-CT can be ordered with custom lead lengths. For example, Opt FT=50 for 50 foot leads. We also sell extra lead wire to allow for field extension of the leads. Option FT does not affect the accuracy specifications.

Advanced Options

The Accu-CT advanced options are generally not useful when ordering the Accu-CT for use with a WattNode® meter, but may be useful for other applications.

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