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DC current sensors, dc current transducers,
dc current probes |
Powertek UK Tel: +44 1788 519911 US Tel: +1 631 744 0294 Email : info@powertekuk.com |
return to homepage | info@powertekuk.com | contact us
The CTH
sensors convert dc current to an isolated voltage 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. |
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IRF-rms converts instantaneous output sensors to |
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Signal conditioner terminal connections
Terminals from left to right: Input and output grounds are isolated 250Vdc |
| DC current transducer 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 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 |
| Available through hole sizes (some not
pictured above)
Type 1: 13.5 x 10mm rectangular 1A
– 100A – Supplied attached or separate to conditioner Available split core hole sizes Type 5: 21mm dia 20A - 400A
supplied with 30cm / 12" cable from sensor - signal conditioner Current transducer order codes The order code is based on:- |
| Options - Environmental All models self extinguishing materials to UL94V0 and CSA Options – noise rejection and offset Non standard input current |
Order code examples
| 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 input, 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) |
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Spot
checking large dc currents? |
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All products have CE, IEC, EN, ASME or BS approvals.
