CTRC Current and Superseded Models

Specifications

• Type: Flexible Rogowski coil current transformer with conditioning circuit

Electrical

• Output wires: 8 feet (2.4 m), 22 AWG, white / black twisted
  • May be extended to 100 feet (30 m)
• Optional: up to 100 feet (30 m)
• Frequency: 50/60 Hz nominal
• Maximum voltage: 600 Vac
• Maximum safe amperage: >10,000A. Unlike conventional CTs, Rogowski coil CTs have negligible secondary current (typically less than one microamp) and very low secondary voltages (typically less than 100 mVac), so even during extreme overcurrent, the secondary voltage, current, and power dissipation will all be very low.
• Measurement category: CAT III, 600 Vac
• UL recognized: file number E344623 (PICQ2), UL standard 61010B-1

Accuracy

All measurements at 77°F (25°C) and 60 Hz unless otherwise noted.

• Accuracy: ±1.0% of reading from 5% to 120% of rated primary current
• Conductor position sensitivity: Additional error due to the location of the conductor within the coil

• External conductor sensitivity: ±2.0% of full-scale maximum (to clarify, if an external conductor carrying this CT’s rated current is just touching this CT, then the output of this CT may change by up to ±2.0% of the rated current)
  • CTRC-03100 models only: ±2.5% of full-scale maximum

• Positioned at corner: ±1.0% maximum (if the CT is installed at a sharp bend of the conductor being measured)
  • CTRC-03100 models only: ±2.0% maximum
• Additional error due temperature variation: ±1.5% from -4°F to 140°F (-20°C to 60°C)

Phase Angle

• Phase angle: ±0.50 degrees (30 minutes) from 5% to 120% of rated current
• Conductor position sensitivity: ±0.10 degrees max
• External conductor sensitivity: ±0.25 degrees max
• Positioned in the corner: ±0.10 degrees maximum
• Varying temperature: -4°F to 140°F (-20°C to 60°C): ±0.10 degrees

Conditioning Circuit

• Output at rated amps: 333.33 mVac (one-third volt)
• Maximum output: 1.3 Vac
• CTRC Power requirements: 10 – 30 Vdc (12 Vdc or 24 Vdc recommended), 50 mA typical, 70 mA maximum
• RCSL/RCLL Power Requirements: 3.5 Vdc to 13.5 Vdc (5 Vdc or 12 Vdc recommended), 6 mA typical, 20 mA maximum

Environmental

• Operating temperature: -4°F to 140°F (–20°C to 60°C)
• Operating humidity: Non-condensing, 5 to 90% relative humidity (RH)
• Pollution: POLLUTION DEGREE 2
• Indoor use: Suitable for indoor use.
• Outdoor use: Suitable for outdoor use when mounted in a NEMA 3R or 4 (IP 66) rated enclosure.

Warranty

5 Year limited warranty. See manual for details.

Safety Note

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