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 transducers — **Type 2 - 24.5mm through hole DC-150kHz (internal filter 1500Hz) As standard the sensor is supplied connected via a 100cm (39") cable**

CTHR through hole Type 3 (OEM only)

Hole diameter 3.2mm (0.125") Overall size 24mm (0.94") x 22.2mm (0.874") x 10mm (0.394")
Current ranges: 1 / 2 / 5 / 10 / 19A

CTHR through hole dc transducers — **Type 3 through hole DC-100kHz (internal low pass filter 1500Hz)**

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 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 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 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 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 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

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 Type G Datasheet

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

ISCTHR Type 8 ATEX and UL approved for Instrinsically safe environments

50mm (2") round hole Outer: 127mm (5") x 105mm (4.125") x 31.75mm (1.25")
Current ranges: CTHR / 100 / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500A

**Model ISCTH type 8 intrinsically safe, models from 100A to 2500A**

ISCTH Datasheet

**Molded integral 8ft cable for intrinsically safe connection**

CTLP Loop Powered DC Current Transducers

Current ranges: CTLP 25 / 50 / 100 / 400 / 500 / 600 / 800 / 1000 / 1500 / 2000 / 3000A

**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

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: 3.2mm diameter 1A-19A (OEM only)

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)