DC Current Sensors for Industrial, Automation, Rail Transport, Welders, DCS and Electric Vehicles

Converting dc current to an isolated voltage or current loop. Optional interfaces

The CTH current sensors convert dc current to an isolated voltage or mA output with instantaneous precision. The CTH output is a faithful reproduction of the measured current, whether ac or dc. 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 CTH sensors is any value from 1A to 40000Adc. 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 dc 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 CTH models, a NIST/NPL (UKAS) traceable calibration certificate and certificate of conformance is supplied.

More Info On: Our AC / DC Transducers

EV and Outdoor models along with weather proof cabling available

For alarm, protection and threshold monitoring please click Din trip relay

CTH 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**

CTH 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**

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

CTH 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.

CTH 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**

CTH split core Type 6 / CTH split core Type 7

CTH 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

CTH 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

CTH Type 4 mini and CTH 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

CTH Type 4 and CTH split core Type 8

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

CTH through hole core — **Type 8 split core DC-400Hz supplied with 8ft cable**

CTH 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: CTH / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500 / 3000A

CTH Type 8F

Hole: 57mm (2.25") round hole Outer: 137mm (5.375") x 134mm (5.25") x 42.00mm (1.625")
Current ranges: CTH / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500A

CTH Type 8EE

Hole: 108mm (4.25") round hole
Outer: 184mm (7.25") x 159mm (6.25") x 42.00mm (1.625")
Current ranges: CTH / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500 / 5000A

CTH 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: CTH / 200 / 300 / 400 / 500 / 800 / 1000 / 1500 / 2000 / 2500A

CTH Type EE Datasheet

CTH 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 Datasheet

CTH split core Type G

CTH 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

CTH Type G Datasheet

CTH split core Type 10

CTH 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

CTH split core Type 11

CTH aperture 330mm (13") x 330mm (13"). Outer 534mm (21") x 534mm (21")
Current ranges 25000 / 30000 / 35000 / 40000Adc

CTH split core Type 10 — **Type 10 & 11 split core DC-1kHz**

CTH Type G, 10 and 11 Data Sheet

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 numbers used in DC Current Transducer Config:

Inst. Power: 13/14 +ve/-ve | Sensor 15(wht) 16(Red) 17(blk) 18(Grn)| Outputs: 7/8 4-20mA 9/10 0-10V (7, 9 grounds)

Input and output grounds are isolated 300V

Signal conditioner overall size 106mm (4.187") x 90mm (3.5") x 32mm (1.25")

DC 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 CTH 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: New Part

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:-

CTH / 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 CTH 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

CTH / 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)

CTH / 400A / 10 / TH / 48Vdc type 4

±400Adc input, ±0-10V output, through hole, 48Vdc aux power input core type 4 (50mm hole dia)

CTH / 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

CTH / 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)