Introduction

The CRC rogowski sensor is an alternating current measurement device. Unlike current sensors with ferromagnetic core, the linearity of the Rogowski sensor makes it specifically indicated to measure high currents. Thanks to a wide measurement range, CRC current sensors cover a wide current range.

The CRC measures the load currents of an electrical system and send the data to meters.

The CRC flexible current sensors can be connected to EMS-96 and EMA-90N.The CRC flexible sensor range is specially designed for existing installations restricted by strict integration constraints or with high-intensity currents. The lack of a ferromagnetic core makes the Rogowski sensor linear even with high currents.

Mouting

Precautions:

• The conductor should not be near the opening/closing mechanism to avoid compromising measurement accuracy.
• The coil should not pinch the conductor to avoid compromising measurement accuracy.
• The coil-phase correspondence must be correct.

Installation

• Connect CRC sensors to the meters.
• Press the opening/closing mechanism pressure points and open the coil.
• Place the coil around the conductor making sure the opening/closing mechanism arrow matches the current direction.
• Close the coil.

Dimensions

Code	Coil length (mm)	External coil diameter (mm)	Maximum conductor diameter (mm)
CRC250100AC052M	250	92	68
CRC300100AC052M	300	108	84
CRC400100AC052M	400	139	115
CRC500100AC052M	500	171	147
CRC600100AC052M	600	203	179
CRC700100AC052M	700	235	211
CRC800100AC052M	800	267	243
CRC900100AC052M	900	299	275
CRC1000100AC052M	1000	330	306
CRC1100100AC052M	1100	362	338
CRC1200100AC052M	1200	394	370

Technical Characteristics

Electrical features
Primary current	20÷4000A
Output signal	100 mV/kA @50 Hz
Operating frequency	From 45 to 65 Hz
Accuracy	±0,5%
Linearity	±0.2%
Position sensitivity	±2% (primary conductor near the opening/closing mechanism)
External field influence	max ±0,5%
Temperature drift	±0.07% per °C
Internal resistance	30 Ω/400 mm
Material
Coil and connection cable	Thermoplastic rubber, self-extinguishing degree V-0 (UL 94)
Opening/closing mechanism	PA6, self-extinguishing V-0 (UL 94)
Coil colour	Orange / Blue / Black / Red
Protection degree	IP52
Connection cable
Type	1000V (UL style 20940)
External diameter	5 mm
Cables	2, section 0.1288 mm2 (26 AWG)
Length	2 m (customizable upon request)
Overvoltage
Category	Cat. III 1000 V @50/60 Hz Cat. IV 600 V @ 50/60 Hz
Dielectric strength
Insulation voltage	7.4 kVAC for 1 minute
Insulation type	Double electrical insulation
Ambient conditions
Operating temperature	-20…+70 °C
Storage temperature	-20…+70 °C
Relative humidity	10…95%
Maximum altitude	2000m
Pollution degree	2
Compliance
Reference standards	2014/35/EU (Low Voltage) EN61010-1
Approvals