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.
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: 0.333 Vac or 1.00 Vac (with Option 1V)
- •Output lead wires:
- •Style: Two conductor, white and black twisted pair (equivalent to about one #8 AWG 0.213″ dia.)
- •Standard length: 8 ft (2.4 m)
- •Gauge: #18 AWG
- •Type: MTW, UL 1015
- •Voltage: 600 Vac
- •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: 1.83 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”
