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High Current DC Current Sensors for Arc Furness Smelting, Electro-chem, Rail Transport, Welders and DCS

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.

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Series SDN-414 non inductive co-axial current shunt
CTH split core Type 6

CTH split core Type 10

Type 10 & 11 split core DC-1kHz
  • 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 Type G, 10 and 11 Data Sheet

CTH split core Type 6

CTH split core Type 11

Type 10 & 11 split core DC-1kHz
  • CTH aperture 330mm (13") x 330mm (13"). Outer 534mm (21") x 534mm (21")
  • Current ranges 25000 / 30000 / 35000 / 40000Adc

CTH Type G, 10 and 11 Data Sheet

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.

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

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

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

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

Signal conditioner terminal connections

Signal conditioner

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")