AC/DC Split Core Current Sensor CT1000S
This AC/DC split core current sensor is designed for measuring large DC and AC currents in applications such as electric vehicles, renewable energy systems, inverters, and motors. It facilitates high-current measurements by clamping around existing current connections. With its voltage output, this sensor is compatible with power analyzers (WT series and PX8000) and waveform measurement instruments (ScopeCorders and DLM series), making it a versatile tool for various high-current measurements.
Accurately Measure Large Currents Without Rewiring
This split core current sensor offers superior noise immunity, providing stable measurement of large currents over a wide bandwidth.
Main Unit
1：Lock lever
Sub unit
2：Power LED
3：Overcurrent LED
4：Demag button
5：Offset adjust knob
IV unit
6：Output connector
Power supply
7：Power connector
Cable
8：Cable length
Select from 3m, 5m, 10m
When using a current sensor, the conductor's position can impact measurement accuracy. This effect can be minimized by securing the cable in the center of the sensor's feed-through hole. A 30 mm diameter jig is included as a standard accessory with the CT1000S to secure the conductor's position. This accessory stabilizes the target cable, reducing measurement variations and ensuring high-accuracy current measurements regardless of the cable diameter.
The CT1000S features six M4 screw holes on the main body for mounting. By preventing sensor misalignment and maintaining consistent measurement conditions, this improves measurement repeatability.
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| Model name | CT1000S | CT1000A | CT1000 | 701931* |
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| Rated current | 1000Arms | 1000Arms | 1000Apeak | 500Arms |
| Accuracy（50/60Hz） | ±（0.2% of rdg ＋0.01% of f.s.） | ±（0.04% of rdg ＋ 30μA） | ±（0.05% of rdg ＋ 30μA） | 〜500A:±1% of reading ±5mV 500A〜700Apeak:±2% of reading（Amplitude accuracy） |
| Bandwidth（－３㏈） | DC~300kHz | DC~2MHz | ||
| Operating temperature range | Main unit:－40℃〜85℃ Sub unit:5℃〜40℃ IV unit:5℃〜40℃ |
－40℃〜85℃ | 10℃〜50℃ | 0℃〜40℃ |
| Operating humidity range | 20%〜80% RH （no condensation） |
80%RH or less （no condensation） |
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| Dimensions （W×H×D）㎜ |
Main unit:190×153×52 Sub unit:177.5×33×41 IV unit:60×24×40 |
128×106×54 | 128×106×60 | Sensor：176×69×27 Terminator：27×55×18 |
| Primary current hole diameter | φ52mm | φ38.2mm | φ30mm | φ20mm |
| Supply voltage | ±12V | ±15V | ±15V | ±12V |
| Supply current | ±0.8A（Maximum） | Approx.（120mA+output current） | Aoorix（150mA+output current） | 580mA（Maximum） |
| Output | 2mV/A | Primary rated current at 1000A is 666.6mA | 0.01V/A | |
| Connector type | BNC | D-sub 9 pin | BNC | |
*For waveform measurement
Compatibile Configurations with Measurement Instruments
The CT1000S is compatible with various power analyzers and waveform measurement instruments. To operate the current sensor, a power supply is necessary. You can utilize the power supply option available on the measuring instrument, or connect an external power supply. It's important to note that depending on the power supply type, there may be a maximum limit to the number of current sensors that can be operated with a single power supply. Please refer to the list below for the specific number of sensors that can be used.
Pairings of Measurement Instruments and Power Sources with the CT1000S
Number of available sensors for each power supply
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| Model | 760903 | PX8000 /P4 |
DL950 /P4 |
DL950 /P8 |
DLM3000 /P2, /P4 |
DLM5000HD/ DLM5000 /P4, /P8 |
701934 |
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| Rated current | ±12 V ±0.8 A |
±12 V ±1A 4 ch total |
±12 V ±2.4 A 4 ch total |
±12 V ±2.4 A×2 4 ch total × 2 |
±12 V ±1.2 A 4 ch total |
±12 V ±2.0 A 8 ch total |
±12 V ±2.5 A 4 ch total |
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Number of CT1000S |
×1 | ×1 | ×3 | ×3 ×3 |
×1 | ×2 | ×3 |
Electric Vehicles
Yokogawa Test&Measurement instruments continue to evolve and advance to support the increasingly complex electronic vehicle components, systems, and innovations.
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A renewable ecosystem relies on interconnected components to harness and distribute energy, addressing challenges like energy conversion efficiency, power compliance, and quality, with Yokogawa Test&Measurement driving innovation for a sustainable future.
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