ACTL-1250 Split-Core CT – Info

DOWNLOADS

• Accu-CT Series Brochure (PDF)
• ACTL-1250 Datasheet Standard and Option C0.6 (PDF)
• ACTL-1250 C0.3 Datasheet Option C0.3 (PDF)
• ACTL-1250 C0.2 Datasheet Option C0.2 (PDF)
• ACTL-1250 Installation Guide (PDF)

DESCRIPTION

Split-Core Current Transformer Standard and Revenue Grade Accuracy

Oval Window Opening 1.25 x 1.77 in. is ideal for two parallel conductors. Available in three rated current ranges 150 A, 250 A, 300 A, 400 A, and 600 A The 0.333 Vac output is very linear with the industry’s lowest phase angle error. All CTs Are Not the Same!

The patented Accu-CT split-core current transformer technology delivers exceptional linearity and low-end accuracy. Developed specifically for solar inverter, variable-speed motor drive, and other applications where there are large variations in current. The 100:1 turn down ratio of Accu-CTs is ten times better than industry standard CTs. The unique one-handed opening and closing mechanism makes installation a snap.

ACTL series CTs are available in both standard and revenue-grade accuracy models. A serialized calibration certificate can be requested for C0.6 and better accuracy revenue-grade models.

The oval opening can handle a single 750 kcmil (MCM) conductor or two 350 kcmil (MCM) conductors.

• Safe: burden resistor built-in, standard 0.333 Vac output at rated full scale current—no shorting blocks needed!
• Glove-friendly: easy to open and install with one hand while wearing safety gloves
• IEEE C57.13 and IEC 60044-1 accuracy: over full temperature range and down to below 1% of rated current
• Exceptionally low phase angle error: essential for accurate power and energy measurements
• UL 2808 Listed meets 2017 NEC code requirement for field installed CTs
• Approvals: CE mark, RoHS

WARNING: This product can expose you to chemicals including Antimony Trioxide, which is known to the State of California to cause cancer. For more information go to: www.P65Warnings.ca.gov

PERFORMANCE GRAPHS

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

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), for Option C0.6, and for Option C0.3; 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

With Option C0.3, the Accu-CT meets IEEE/ANSI C57.13-2008 class 0.3 accuracy and IEC 60044-1 class 0.5 and class 0.5 S accuracy and each CT is shipped with a certificate of calibration.

• Accuracy: ±0.30% from 1% to 120% of rated current, -30°C to +75°C
• Phase Angle: within ±2 Hz from nominal line frequency (either 50 Hz or 60 Hz)
  • ±0.125 degrees (7.5 minutes) from 10% to 120% of rated current, -30°C to +55°C
  • ±0.25 degrees (15 minutes) from 1% to 120% of rated current, -30°C to +75°C
• IEEE C57.13 Accuracy: class 0.3 from 1% to 120% of rated current
• IEC 60044-1 and IEC 61869-2 Accuracy: class 0.5 and 0.5S from 1% to 120% of rated current

With Option C0.2, the Accu-CT accuracy increases to 0.2% and meets IEEE/ANSI C57.13-2008 class 0.3 accuracy and IEC 61869-2 class 0.2 and class 0.2S accuracy. See Specifications below for details.

• ACTL-1250 models with Opt C0.2 for use on 50 Hz electrical systems should be ordered with option 50 Hz for best accuracy. See Specifications below for details.

• Opt 60 Hz Calibrate the CT for best accuracy at 60 Hz. This is the default calibration, but the option is included to make it clear that Opt C0.2 CTs must be calibrated specifically for 50 or 60 Hz. We recommend all customers order with Opt 60Hz or Opt 50Hz.

• Opt 50 Hz Calibrate the CT for best accuracy at 50 Hz instead of the standard 60 Hz. Without this option, the phase angle errors at 50 Hz may exceed the published limits.

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: 0.333 Vac or 1.00 Vac (with Option 1V)
• Output lead wires:
  • Style: Two conductor, white and black twisted pair
  • Standard length: 8 ft (2.4 m)
  • Gauge: #20 AWG
  • Type: MTW, UL 1015
  • Voltage: 600 Vac
• Internal Burden Resistance: see ACT-1250 Internal Burden Resistance

MECHANICAL

• Width: 4.50 inches (114.0 mm)
• Height: 3.30 inches (83.4 mm)
• Thickness: 1.58 inches (40.2 mm)
• Window: 1.77 x 1.26 inches (45.0 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: IEC 60044-1; ACTL-1250-Declaration-of-Conformity
• RoHS
• Assembled in USA
• Label barcode: QR Code, “Model ; SerialNum”

MODELS

ACCU-CT^® ACT-1250 SPLIT-CORE CTS

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

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 calibration certificate

OPT C0.3

With Option C0.3, the Accu-CT meets IEEE/ANSI C57.13-2008 class 0.3 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 ±0.3% from 1% to 120% of rated primary current from -30°C to 55°C.
• Phase angle improves to ±0.125 degrees from 10% to 120% of rated current from -30°C to +55°C.
• Includes a calibration certificate
• Opt C0.3 CTs for use on 50 Hz electrical systems should be ordered with option 50 Hz for best accuracy.

OPT 50HZ

The ACTL-1250 class 1.2 and class 0.6 series of transformers are not available with a 50 Hz option, because it is not needed. These models meet the accuracy specifications over the full range from 50 to 60 Hz. Class 0.3 series CTs should be ordered with option 50 Hz for best accuracy.

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.

• See ACTL-1250 Advanced Options.