SECURUS/Hardware/Current sensor for energy monitoring

LoRaWAN current sensors for energy monitoring

Current transformers measure selected conductors to observe individual machines and systems. SECURUS shows current readings and calculated consumption and cost estimates. A qualified electrician selects and installs them in the distribution board.

Milesight

CT101 / CT103 / CT105

Smart current transformer

Split-core transformer for retrofitting on equipment, sub-distribution boards and machines. Powers itself from the measured current.

Measured variable: RMS current, 50–60 Hz
Measuring range: CT101 up to 100 A, CT103 up to 250 A, CT105 up to 500 A
Accuracy: ±1 % (above 5 A)
Power supply: from the measured current (inductive), optional USB-C
Battery life: not applicable, powered by the measured current
Additionally: Temperature probe (−20 to +100 °C)
Protection rating: IP30
Operating temperature: −20 to +70 °C

Technical datasheet (PDF)

Milesight

CT303 / CT305 / CT310

Three-phase current transformer

Three split-core transformers on one transmitter monitor all three phases of a sub-distribution board or machine separately, without touching the wiring.

Measured variable: RMS current per phase, 50–60 Hz
Measuring range per transformer: CT303 up to 300 A, CT305 up to 500 A, CT310 up to 1,000 A
Accuracy: ±1 %
Power supply: from the measured current (inductive), optional USB-C
Battery life: not applicable, powered by the measured current
Additionally: Temperature probe (−20 to +100 °C)
Alerts: Threshold and over-range alarm
Protection rating: IP30

Technical datasheet (PDF)

Dragino

CS01-LB

Four-channel current sensor converter

Up to four split-core transformers on one device, for running times and consumption of individual machines.

Channels: up to 4 current transformers
Current transformers: 100 A, 300 A or 600 A (separate)
Features: Running time, consumption trend, current alarm
Power supply: Battery, 8,500 mAh (Li-SOCl₂)
Battery life: up to around 4 years (manufacturer's calculation, depending on number of transformers and transmission interval)
Operating temperature: −40 to +85 °C

Technical datasheet (PDF)

Technical data according to the manufacturer's datasheet, battery life under the stated conditions. All devices shown transmit via LoRaWAN. In addition to these examples, we also use LoRaWAN devices from other manufacturers depending on requirements.

Select current transformers by conductor, phase and range

Transformer aperture, range and number of phases must suit the equipment. Plan appropriate measurement points for each phase of three-phase loads. Passing several conductors through one transformer does not automatically produce the consumption figure sought. Design depends on the installation and monitoring goal.

Relevant use cases

Energy monitoring

FAQ

Sensor selection questions

Are calculated kWh certified meter readings?

No. Consumption calculated from current is an estimate for monitoring and does not replace an appropriate billing meter.

Which device is right for you?

We select the right device with you, integrate it into SECURUS and deliver it ready for use.

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