Square 0.75 in. Window Opening 7 Models 5 to 250 A
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. ACT series CTs are available in both standard and revenue grade accuracy models. Revenue grade models ship with a serialized certificate of calibration.
- Safe: built-in burden resistor provides 333 mVac voltage output at the rated full scale current—no shorting blocks needed!
- UL 2808 Listed meets 2017 NEC code requirements for field installed CY
- 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
- Glove-friendly: easy to open and install with one hand while wearing safety gloves
- Approvals: CE mark and RoHS complient
- Accu-CT Series Datasheet (PDF)
- ACTL-0750 Manual (PDF)
|ACTL-0750-020 Opt C0.6||20||$57.00 each|
|ACTL-0750-050 Opt C0.6||50||$57.00 each|
|ACTL-0750-100 Opt C0.6||100||$57.00 each|
|ACTL-0750-200 Opt C0.6||200||$57.00 each|
|ACTL-0750-250 Opt C0.6||250||$57.00 each|
- Graphs show typical performance at 23°C, 60 Hz
- Graph shows a positive phase angle when the output leads the primary current.
The accuracy specifications apply over the full operating temperature range (-30°C to 80°C), unless otherwise noted. Standard models are calibrated for optimum accuracy at 60 Hz. For use with 50 Hz services, we recommend ordering with Option 50Hz. The following accuracy specifications may vary when other CT options are specified. For details, refer to the individual option descriptions.
These specifications are for 60 Hz operation or for 50 Hz when Option 50Hz is specified.
- 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
- Note: The ACTL-0750-250 model specifications are valid only to 40°C
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. When used on 50 Hz services, Option C0.6 must be ordered with Option 50Hz.
- 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; ±0.50 degrees (30 minutes) below 0°C from 1% to 10% 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
- Available Models: Option C0.6 is available for all models except ACTL-0750-005
- Note: The ACTL-0750-250 Opt C0.6 model specifications are valid only to 40°C
- Primary rating: 5 to 250 amps nominal, 600 Vac, 60 Hz nominal
- Maximum continuous primary amps: varies with model and options
- Maximum primary conductor gauge: 4/0, 250 kcmil (see Wire Gauges)
- Note, the largest sizes may not fit in all cases, depending on insulation thickness.
- Output: 333.33 mVac or 1.00 Vac (with Option 1V)
- Output lead wires:
- Standard length: 8 ft (2.4 m)
- Gauge: #22 AWG
- Type: MTW, UL 1015
- Voltage: 600 Vac
- Style: Two conductor: white and black, twisted
- Internal Burden Resistance: see ACTL-0750 Internal Burden Resistance
- Width: 2.38 inches (60.4 mm)
- Height: 2.40 inches (61.0 mm)
- Thickness: 0.90 inches (22.9 mm)
- Window: 0.78 inches (20.0 mm)
- Weight: 6.1 oz (172 grams)
- Material: PC/ABS
- Operating temperature: -30°C to 80°C
- UL recognized: file number E325972 (XODW2), standard IEEE/ANSI C57.13
- cUL recognized (Canada): file number E325972 (XODW8), standard CAN/CSA 60044-1
- CE mark: IEC 60044-1; Declaration of Conformity
- Assembled in USA, qualified under the Buy American provision in the American Recovery and Reinvestment Act of 2009 (ARRA).
- Label barcode: QR Code, “Model ; SerialNum”
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).
- Note: The model ACTL-0750-250 Opt C0.6 accuracy specifications are valid only to 40°C and 1% to 100% of the full-scale primary current rating (other models are specified to 120%).
- 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 80°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.
- Not available for 5 amp Accu-CT models.
Standard models are calibrated for optimum accuracy at 60 Hz. Option 50 Hz calibrates for best accuracy at 50 Hz. Option 50 Hz models have the same accuracy specifications as standard models and are also available in combination with Option C0.6 (selected rated amps) for higher accuracy. See ACTL-0750 Option 50 Hz for more details on the accuracy differences.
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.
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.
Warning: Hazardous Voltages – Only qualified personnel or licensed electricians should install the WattNode meter and current transformers.