Converting dc and ac current to an isolated 0-100mV, 0-1V, 0-2V,
0-5V, 0-10V, 0-20mA, 4-20mA,
4-12-20mA or 5-25mA signals
Powertek
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The CTH sensors convert dc and ac current to an isolated voltage or mA output with the ability to track ac waveshapes. The CTH output is a faithful reproduction of the measured current, whether ac or dc. All popular 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.
For level sensing, protection, alarm and threshold monitoring please see Trip relay
Type 6: DC-10kHz Type 7: DC-4kHz (internal filter
1500Hz). As
standard the sensor is supplied connected via a 30cm
(12" cable)
Type 2 - 24.5mm through hole DC-150kHz (internal filter
1500Hz)
As standard the sensor is supplied connected via a 30cm (12"
cable)
Type 3 through hole DC-100kHz (internal low pass filter
1500Hz)
Sensor can be box mounted
Type 5 split core DC-25kHz (internal filter 1500Hz).
As standard the sensor is supplied connected via a 90cm (36"
cable)
Type 6: DC-10kHz Type 7: DC-4kHz (internal filter
1500Hz).
As standard the sensor is supplied connected via a 30cm (12"
cable)
Type 8 mini split core DC-400Hz
Type 8 split core DC-400Hz
Type 9z split core DC-400Hz
Type 9z with extended cable
Type 8F split core DC-400Hz
Type 8EE split core DC-400Hz
Type 10 & 11 split core DC-1kHz
Molded integral cable for intrinsically safe connection
CTLP case A models 25A, 50A and 100A
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")
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 or 0-20mA, 4-20mA
or 5-25mA outputs. All CTH outputs can be bipolar / instantaneous. Non-standard outputs are available. |
Core type | Through hole or split core clamp type, based on dc Hall Effect sensing |
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, IEC1010 cat II & IEC348, UL/CSA rated materials. Self extinguishing materials to UL94V0 |
Warranty | 2 year warranty |
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 / 72Vdc type 4 | 400Adc incput, 0-10V output, through hole, 72Vdc aux power input core type 4 (50mm hole dia) |
CTH / 2000A / 10 / SC / 110Vdc type 7 | 2000Adc input, 0-10V output, split core, 110Vdc aux power input, type 7 core (163 x 50mm) |