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

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

The CTH current sensors convert dc and dc+ac current to an isolated voltage or mA output with fast response and precision. The CTH sensor output is a faithful representation of the measured current, whether ac or dc. All popular output types; process control voltage and current loop outputs are available. Through hole or split core options mean installation is non-intrusive and straightforward. The input ranges of the CTH sensors range from 0-1A to 0-40000Adc. Optional dc offset control allows nulling of residual dc current to ensure best accuracy and maximise output span. The current 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) with fast step response. The CTH can 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.

Compact Current sensor - CTH 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: 0-1A up to 0-100A, DC-100kHz

dc current sensor, CTH type 1 — **Type 1: DC-100kHz (internal filter 1500Hz). As standard the sensor is supplied connected via a 100cm (39") cable**

Fast Response Current Sensor - CTH Type 2

Type 2 current ranges: From 0-5A to 0-600A, 25.4mm dia
DC - 150kHz, Models from 0-5A to 0-600A
9-36V dc powered

dc current sensing transducers, type 2 — **Type 2 - Through hole for best accuracy. As standard the CTH sensor is supplied connected via a 100cm (39") cable to its conditionwr**

DC/AC Current sensor for harsh applications - CTH Type 3

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
Automotive, vehicle, rail traction and VF drives

Rugged CTH through hole dc current transducers — **Current sensor CTH Type 3, through hole DC-10kHz, optional filters**

CTH Sensor Type 3 CTU Datasheet

Fast installation clip-on current sensor - CTH Type 5

Hole diameter 21mm (0.82") Overall size 69mm (2.72") x 46mm (1.81") x 22mm (0.87")
Current ranges: 0-20A with models up to 0-400A split core models.

CTH split core dc current sensing transducer, type 5 — **Type 5 split core DC-25kHz (filter options). 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 split core current sensor Type 6 and CTH split core sensor Type 7 — **Type 7: DC-10kHz (internal filter 1500Hz). As standard the sensor is supplied connected via a 2.4m (8ft) cable**

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 dc current sensing hall effect 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 through hole core — **Type 9z with extended cable**

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 split core terminals on current sensor head

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 split core Type 10 for Large DC Currents

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 Type G split core and large Type 10 current sensors — **Type 10 & 11 split core DC-1kHz**

CTH Type G, 10 and 11 Data Sheet

CTLP Compact Loop Powered DC Current Transducers

CTLP Compact Type Loop Powered, ranges:
CTLP 25 / 50 / 100 / 400 / 500 / 600 / 800 / 1000A

CTLP case A loop powered current sensor — **CTLP case A models 25A, 50A and 100A**

CTLP 25A Datasheet

CTLP case Z models current sensor with terminal block — **CTH 9z core with Terminal Strip connection**

CTLP Datasheet

CTH Signal conditioner terminal connections

CTH Din-rail Signal conditioner for current measurement

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: 28.45 (1.125") diameter, ranges 0-50A - 0-5000A, with integral signal conditioner

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), Modbus over EtherNet, 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)