Yokogawa AC/DC Split Core Current Sensor CT1000S

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.

Model name	CT1000S	CT1000A	CT1000	701931*
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 humidity range	Main unit:－40℃〜85℃ Sub unit:5℃〜40℃ IV unit:5℃〜40℃	－40℃〜85℃	10℃〜50℃	0℃〜40℃
Operating temperature range	20℃〜80% RH （no condensation）			80%RH （no condensation）
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.