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 ACTL-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.

Standard

Revenue Grade (call us for prices and availability)

• 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.

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:
  • 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
• 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.

• 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.