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CTHR AC Current Sensors, AC Current Transducers, instantaneous and rms sensing

The CTHR current transducers sensors convert ac current to an isolated voltage or mA output with the ability to track ac waveshapes. The CTHR current transducer output is a faithful reproduction of the measured current. All popular EV types, process control voltage and current loop outputs are available. Through hole or split core options mean that connection is non-intrusive and straightforward. The available input range of the CTHR current transducers is any value from 1A to 40000Aac. Optional dc offset control allows nulling of residual dc current to ensure best use of the output span. The sensor power input is designed to operate over a wide voltage range associated with process control and sub-station auxiliary ac supply systems. Active Hall Effect sensor technology allows measurement from DC-150kHz (depending on the sensor type) along with fast step response. The CTH can be used to provide an instantaneous output for ac currents. Typical applications are found in process control systems like PLC or SCADA, transportation, telecommunications, dc drives, welding and circuit breaker trip coils. For all CTHR models, a NIST/NPL (UKAS) traceable calibration certificate and certificate of conformance is supplied.

CTHR Sensors General Datasheet pdf | CTHR with Integral Terminal Block Datasheet | CTHR Sensor User Manual
CTHR Signal Conditioner Outline Drawing | ISCTHR datasheet pdf

CTHR through hole core Type 1

  • Type 1: Hole: 13.5mm (0.53") x 10mm (0.39")
  • Overall size 145mm (5.71") x 95mm (3.74") x 38mm (1.50")
  • Type 1 current ranges: 1 / 2 / 5 / 10 / 20 / 30 / 40 / 50 / 75 / 100A
dc transducer
Type 1: DC-100kHz (internal filter 1500Hz). As standard the sensor is supplied connected via a 100cm (39") cable

CTHR Type 2

  • Type 2 current ranges: From 0-5A to 0-600A, 25.4mm dia
dc type 2 transducers
Type 2 - 24.5mm through hole DC-150kHz (internal filter 1500Hz) As standard the sensor is supplied connected via a 100cm (39") cable

CTH Split core Type 3 For EV

  • Hole diameter 28.45mm (1.125") Overall size 78.74mm (3.1") x 63.5mm (2.5") x 33mm (1.3")
  • Current ranges: 50 / 100 / 200 / 500 / 1000 / 2000 / 5000A
CTH through hole dc transducers
Type 3 through hole DC-10kHz, optional low pass filter

CTH Type 3 CTU Datasheet

CTHR split core Type 5

  • Hole diameter 21mm (0.82") Overall size 69mm (2.72") x 46mm (1.81") x 22mm (0.87")
  • Current ranges: 20 / 30A/ 40 / 50 / 100 / 200 / 300 / 400A split core models.
CTHR split core dc transducer
Type 5 split core DC-25kHz (internal filter 1500Hz). As standard the sensor is supplied connected via a 100cm (39") cable

CTHR split core Type 6 / CTHR split core Type 7

CTHR split core Type 6:
  • Hole: 104 (4.09") x 40mm (1.57") Outer: 159mm (6.26") x 85mm (3.35") Current ranges: From 200A to 4000A
CTHR split core Type 7 :
  • Hole: 163mm (6.42") x 50mm (2")Outer: 233mm (9.17") x 95mm (3.74") Current ranges: From 500A to 4000A
CTHR split core Type 6 / CTHR split core Type 7
Type 1: DC-100kHz (internal filter 1500Hz). As standard the sensor is supplied connected via a 100cm (39") cable

CTHR Type 4 mini and CTHR split core Type 8 mini

  • Hole: 28.5mm (1.125") round hole
  • Outer: 102 mm (4") x 80mm (3.125") x 19mm (0.75")
  • Current ranges: 100 / 200 / 300 / 400A
CTHR Type 4 mini and CTHR split core Type 8 mini
Type 8 mini split core DC-400Hz supplied with 8ft cable

CTHR Type 4 and CTHR split core Type 8

  • Hole: 50mm (2") round hole Outer: 127mm (5") x 105mm (4.125") x 31.75mm (1.25")
  • Current ranges: CTHR / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500A
CTHR through hole core
Type 8 split core DC-400Hz supplied with 8ft cable

CTHR Type 9z

  • Hole: 115mm x 33mm (4.5" x 1.25") rectangular hole
  • Outer: 199mm x (7.83") x 99mm (3.90") x 34mm (1.34")
  • Current ranges: CTHR / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500 / 3000A
CTHR through hole core
Type 9z split core DC-400Hz
CTHR through hole core
Type 9z with extended cable

CTHR Type 8F

  • Hole: 57mm (2.25") round hole Outer: 137mm (5.375") x 134mm (5.25") x 42.00mm (1.625")
  • Current ranges: CTHR / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500A
CTHR Type 8F
Type 8F split core DC-400Hz supplied with 8ft cable

CTHR Type 8EE

  • Hole: 108mm (4.25") round hole
  • Outer: 184mm (7.25") x 159mm (6.25") x 42.00mm (1.625")
  • Current ranges: CTHR / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500 / 5000A
CTHR Type 8EE
Type 8EE split core DC-400Hz supplied with 8ft cable

CTHR Type EE terminals on sensor head

  • Hole: 108mm (4.25") round hole
  • Outer: 184mm (7.25") x 159mm (6.25") x 42.00mm (1.625")
  • Current ranges: CTHR / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500A
CTHR Type EE terminals on sensor head

CTH Type EE Datasheet

CTHR Type D split core terminals on sensor head

  • Hole: 28.5mm (1.125") round hole
  • Outer: 116.59mm (4.59") x 73.4mm (3.125") x 19mm (0.75")
  • Current ranges: 100 / 200 / 300 / 400 / 500A
CTH Type D split core terminals on sensor head

CTH Type D Datasheet

CTHR split core Type G

  • CTHR Hole size 76.2mm (3.0") x 165.1mm (6.5")
  • Outer 196.85mm (7.75") x 304.8mm (12")
  • Current ranges 1000 / 2000 / 3000 / 4000 / 5000 / 6000A
CTHR split core Type G
Type G split core DC-400Hz supplied with 8ft cable
CTHR Type G Datasheet

CTHR split core Type 10

CTHR split core Type 10
  • CTHR Hole size 140mm (5.5") x 203mm (8"). Outer 254 (10") x 350 (13.75")
  • Current ranges 5000 / 6000 / 7000 / 8000 / 9000 / 10000 / 15000 / 20000A
CTHR split core Type 11
  • CTHR aperture 330mm (13") x 330mm (13"). Outer 534mm (21") x 534mm (21")
  • Current ranges 25000 / 30000 / 35000 / 40000Adc
CTHR split core Type 10
Type 10 & 11 split core DC-1kHz

CTHR Type G, 10 and 11 Data Sheet
CTLP Loop Powered Current Transducers
  • Current ranges: CTLP 25 / 50 / 100 / 400 / 500 / 600 / 800 / 1000 / 1500 / 2000 / 3000A
CTLP case A
CTLP case A models 25A, 50A and 100A

CTLP 25A Datasheet
CTLP case Z models
Molded integral 8ft cable for intrinsically safe connection
CTLP Datasheet

Signal conditioner terminal connections

Signal conditioner

Terminals from Left to Right:

output + | output - | power input ground -ve | power input positive +ve

Input and output grounds are isolated 250Vdc

Signal conditioner overall size 145mm (5.71") x 65mm (2.56") x 38mm (1.50")

CTHR AC current transducers general specifications
Ranges
Depending on core type: 1A / 2A / 5A / 10A / 20A / 30A / 40A / 50A / 100A / 200A / 500A / 1000A / 2000A / 3000A / 4000A / 5000A / 6000A / 10000A / 20000A / 25000A / 30000A / 35000A / 40000A Amps peak
Outputs
0-100mV, 0-1V, 0-2V, 0-5V, 0-10V, 4-20mA. All CTHR outputs can be bipolar / instantaneous. Non-standard outputs are available, USB, RS485 and WiFi interfaces available
Core type
Through hole or split core clamp type, sense method based on dc Hall Effect
Insulation voltage rating
Type 1, 2 & 5 rated insulation (Galvanic) 2.5kVpk 1 min 50/60Hz. Type 6 & 7 3kVpk 1 min 50/60Hz. Type 4 & 8 5kVpk 1 min 50/60Hz
Power input
5V / 12Vdc / 24Vdc / wide range 9-36Vdc / 48Vdc / 72Vdc / 110Vdc / 125Vdc / 250Vdc / 115Vac / 230Vac - all fuse, polarity and surge protected
Accuracy
±0.5% for a non split core, ±1.0% for a split core. Conditions +23°C ±5°C, traceable to UKAS NPL/NIST USA
Working temperature range
Typically -20°C - 65°C (can be extended, check for exact model). Functional temperature range –20°C - 70°C (check for each model). CTH types 1 & 2 are –40°C - 85°C (sensor head only)
Protection
Input fuse, output fuse, power input polarity diode, spike suppression
Frequency Response
Depending on sensor type/model. Type 1 & 2 DC- 150kHz max. Type 5, 6, 7, 8 & 9 split cores are DC-10kHz max. Standard HF cut-off filter is 1.5kHz (other values available)
Adjustment
Internal dc offset and gain controls
Mounting
All signal conditioners and sensors have fixing points. Current sensors up to 400A can be mounted on the signal conditioner case or via a cable.
Approvals
CE Marked, EN61010 cat II & IEC348, UL/CSA rated materials. Self extinguishing materials to UL94V0
Warranty
2 year warranty

Available through hole sizes (some not pictured above)

Type 1: 13.5 x 10mm rectangular 1A – 100A – Supplied attached or separate to conditioner

Type 2: 24.5mm diameter 5A - 600A – supplied with 1 metre (39") from sensor - signal conditioner

Type 3: 28.45mm diameter 50A-5000A

Type 4 mini: 28.5mm / 1.125" diameter 100A - 400A Sensor has integral signal conditioner supplied with 2.4M cable

Type 4: 50mm diameter / 2" diameter 100A - 3000A Sensor has integral signal conditioner supplied with 2.4M cable

Available split core hole sizes

Type 5: 21mm dia 20A - 400A supplied with 1 metre (39") cable from sensor - signal conditioner

Type 6: 104 x 40mm 500A - 3000A supplied with 1 metre (39") cable from sensor - signal conditioner

Type 7: 163 x 50mm 500A - 4000A supplied with 1 metre (39") cable from sensor - signal conditioner

Type 8 mini: 28.5mm / 1.125" dia 100A - 400A Sensor has integral signal conditioner supplied with 2.4M cable

Type 8: 50mm / 2" dia 100A - 3000A Sensor has integral signal conditioner supplied with 2.4M cable

Type 8F (maxi): 57.15mm / 2.25" dia 400A - 3000A Sensor has integral signal conditioner supplied with 2.4M cable

Type 8EE: 108.00mm / 4.25" dia 400A - 3000A Sensor has integral signal conditioner supplied with 2.4M cable

Type 9z: 115mm (4.5") x 33mm (1.25") 200A - 3000A Sensor connects to signal conditioner via 2.4M cable

Type G: 76.2mm x 165.1mm / 3.0" x 6.5" 2500A - 5000A Sensor has integral signal conditioner supplied with 2.4M cable

Type 10: 140mm (5.5") x 203mm (8") 5000A - 20000A Sensor connects to signal conditioner via 2.4M cable

Type 11: 330mm (13") x 330mm (13") 25000A - 40000Adc Sensor connects to signal conditioner via 2.4M cable

Longer cable lengths available - on request

Current transducer order codes

The order code is based on:-

CTHR / amps input / output / SC or TH / power input + core type

SC = split core, TH = through hole (non-split core)

Note: 230Vac/dc and 115Vac/dc adapters are available (in this case the CTHR will be supplied with 9-36Vdc input and ac adapter)

Options R : Ruggedization (not available for all sensor types)

Option T : Extended temperature range -40°C - 85°C (not available for all sensor types)

Options : noise rejection and offset, user can specify upper or lower frequency –3db point

Non standard input current

Non standard output voltage, current (25mA, 1A, 5A), USB, RS485 and WiFi interfaces available

All models constructed with self extinguishing materials to UL94V0 and CSA

Current transducer order codes CTHR

CTHR / 50A / 4-20 / TH / 24Vdc type 1
50Adc input, 4-20mA output, through hole, 24V aux power input, core type 1 (13.5 x 10mm)
CTHR / 400A / 10 / TH / 48Vdc type 4
±400Adc input, ±0-10V output, through hole, 48Vdc aux power input core type 4 (50mm hole dia)
CTHR / 800A / 5 / SC / 9-32Vdc type 8 RS485
±800Adc input, ±0-5V output, split core, 9-32Vdc aux power input, core type 8 (50mm hole dia) RS485 interface
CTHR / 2000A / 4-12-20 / SC / 110Vdc type 7
±2000Adc input, 4-12-20mA output (12mA = zero), split core, 110Vdc aux power input, type 7 core (163 x 50mm)
CTHR Sensors General Datasheet pdf | CTHR with Integral Terminal Block Datasheet | CTHR Sensor User Manual | CTHR Signal Conditioner Outline Drawing