RAPS Series High precision
Power Sensor pRODUCTS

Renan Precision RAPS series high precision power sensor is the critical sensing unit for power analysing system.

The RAPS series power electronics power sensor integrates voltage and current measurement channels and can assure measurement accuracy indications of ratio difference and phase angle difference in a broad frequency range at the same time. Its front-end digital architecture enables it to measure numerous electrical characteristics such as power for power electronics system and DC power in complicated electromagnetic situations with high precision.

How do RAPS Precision Power Sensors work

The RAPS series power sensor for power electronics is a voltage and current electronic sensor in one. The RAPS series power sensors are built on the front-end digitalisation philosophy. It primarily consists of voltage and current sensitive components, a primary A/D conversion circuit, an isolated operation power supply, a photoelectric conversion circuit, and an optical fibre transmission system.

The voltage and current sensitive element receive the high voltage and high current signal from the primary circuit and convert it to a low voltage and small current analogue signal that the primary conversion circuit can recognize. The analogue signal is converted into a digital signal and a standard analogue signal via the primary conversion circuit. The digital signal generated by the RAPS frequency conversion power sensor is processed and displayed by the power analysers through the optical fibre communication system after passing through the photoelectric conversion circuit. To quickly develop a high-precision power measuring system, the analogue communication interface may connect with other data acquisition systems.

The isolated operation power supply creates electrical isolation between the AC220V electricity system and the primary circuit while also providing power to the primary circuit.

Uplink data optical fibre and downlink synchronous optical fibre are components of the optical fibre transmission system. The uplink data optical fibre is used to transmit the power electronics power sensor’s high-speed sampling data, while the downlink synchronous optical fibre controls the range conversion of the primary conversion circuit and provides the sampling clock to enable synchronous sampling with other sensors. The analogue interface generates a typical 2.5V analogue signal that may be used to interact with an external data acquisition device.

how do RAPS Precision Power Sensors stand out from tradition sensors?

1. Frequency-variable high-voltage sensor with high bandwidth and high precision

Currently, the voltage sensor most suitable for measuring power from power electronics system is the Hall voltage sensor. The Hall voltage sensor has a maximum voltage measurement range of 6400V, a bandwidth of less than 1kHz, and an accuracy of roughly 1%.

The base model of the RAPS series power electronics power sensor has a maximum test voltage of 15kV (up to 20kV with customization), a typical bandwidth of 100kHz, and an accuracy of 0.1%.

2. A variable frequency power sensor that provides phase angle difference indicators

Phase angle difference is the key index that influences power measurement accuracy, particularly in power factor conditions such as motor no-load testing and large-scale power transformer short-circuit testing.

Currently available for power electronics power measurement are voltage and current transformers, Hall voltage sensors, Hall current sensors, Rogowski coils, and so on, but without angle difference indications. Those products are not designed specifically for the power test system, so the accuracy of measurement are not guarranteed.

The RAPS series power electronics power sensor employs voltage and current sensitive components with independent intellectual property rights that have been successfully researched for several years by the expert team RenAn Precision Technology, and it has a low phase shift index. The phase adjustment circuit is also substantially simplified since the voltage and current sensors are merged into one. RAPS frequency conversion power sensor has an phase angle difference index of 0.5′, which allows for high accuracy measurement even with a low power factor.

3. Wide-range high-precision testing without multi-sensor shifting

To maintain measurement accuracy, it has virtually become common sense for every measurement engineer to pick a sensor with a sufficient range based on the observed voltage and current.

Nonetheless, the dynamic range of the amplitude of the same voltage or current under different operating circumstances is frequently quite great in scientific investigations of diverse electrical equipment. For example, no-load and short-circuit testing of motors or transformers, where the former has a high voltage and low current and the later has a low voltage and high current. When there is a large difference between the voltage and current, multiple voltage and current sensors with different ranges are typically used, and a shift switch circuit is built to select them, so that the sensor range and the measured signal match as closely as possible to meet the measurement accuracy requirements.

Multi-sensors and shift switches are costly, take up a lot of space, and have a low dependability when it comes to high voltage and high current. A multi-winding electromagnetic voltage and current transformer appropriate for power frequency measurement has evolved to address these issues in RAPS power transducers. The measuring range for ensuring accuracy can be increased to some extent by switching the secondary side to low voltage and low current.

The naming principle for RAPS Series Power Transducer

Options for RAPS power sensors:

Voltage range options: AC380V, 690V, 1140V, 3300V, 6600V, 10KV and 15KV – 20KV (customized);

Current range options: 100A, 200A, 300A, 400A, 600A, 1000A, 2000A, 3000A, 4000A, 5000A;

Contact Us to request Datasheet & User Manuals

Model Number	Nominal current range (A)	Nominal voltage range (V)	Accuracy
RAPS380C100-XP	100	380	Options:0.05%, 0.1%, 0.2%
RAPS380C200-XP	200	380	Options:0.05%, 0.1%, 0.2%
RAPS380C300-XP	300	380	Options:0.05%, 0.1%, 0.2%
RAPS380C400-XP	400	380	Options:0.05%, 0.1%, 0.2%
RAPS380C600-XP	600	380	Options:0.05%, 0.1%, 0.2%
RAPS380C1000-XP	1000	380	Options:0.05%, 0.1%, 0.2%
RAPS380C2000-XP	2000	380	Options:0.05%, 0.1%, 0.2%
RAPS380C3000-XP	3000	380	Options:0.05%, 0.1%, 0.2%
RAPS380C4000-XP	4000	380	Options:0.05%, 0.1%, 0.2%
RAPS380C5000-XP	5000	380	Options:0.05%, 0.1%, 0.2%
RAPS690C100-XP	100	690	Options:0.05%, 0.1%, 0.2%
RAPS690C200-XP	200	690	Options:0.05%, 0.1%, 0.2%
RAPS690C300-XP	300	690	Options:0.05%, 0.1%, 0.2%
RAPS690C400-XP	400	690	Options:0.05%, 0.1%, 0.2%
RAPS690C600-XP	600	690	Options:0.05%, 0.1%, 0.2%
RAPS690C1000-XP	1000	690	Options:0.05%, 0.1%, 0.2%
RAPS690C2000-XP	2000	690	Options:0.05%, 0.1%, 0.2%
RAPS690C3000-XP	3000	690	Options:0.05%, 0.1%, 0.2%
RAPS690C4000-XP	4000	690	Options:0.05%, 0.1%, 0.2%
RAPS690C5000-XP	5000	690	Options:0.05%, 0.1%, 0.2%
RAPS1140C100-XP	100	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C200-XP	200	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C300-XP	300	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C400-XP	400	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C600-XP	600	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C1000-XP	1000	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C2000-XP	2000	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C3000-XP	3000	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C4000-XP	4000	1140	Options:0.05%, 0.1%, 0.2%
RAPS1140C5000-XP	5000	1140	Options:0.05%, 0.1%, 0.2%
RAPS3300C100-XP	100	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C200-XP	200	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C300-XP	300	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C400-XP	400	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C600-XP	600	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C1000-XP	1000	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C2000-XP	2000	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C3000-XP	3000	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C4000-XP	4000	3300	Options:0.05%, 0.1%, 0.2%
RAPS3300C5000-XP	5000	3300	Options:0.05%, 0.1%, 0.2%
RAPS6600C100-XP	100	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C200-XP	200	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C300-XP	300	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C400-XP	400	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C600-XP	600	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C1000-XP	1000	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C2000-XP	2000	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C3000-XP	3000	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C4000-XP	4000	6600	Options:0.05%, 0.1%, 0.2%
RAPS6600C5000-XP	5000	6600	Options:0.05%, 0.1%, 0.2%
RAPS10KC100-XP	100	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC200-XP	200	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC300-XP	300	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC400-XP	400	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC600-XP	600	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC1000-XP	1000	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC2000-XP	2000	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC3000-XP	3000	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC4000-XP	4000	10K	Options:0.05%, 0.1%, 0.2%
RAPS10KC5000-XP	5000	10K	Options:0.05%, 0.1%, 0.2%

The key Performance Indicators of RAPS Series Precision Power Sensors

Item	Value
Sampling rate	250kSa/s
Bandwidth	100kHz
Voltage	H Accuracy type：0.05%rd@0.1Hz~5Hz[1]， 0.05%rd@DC，5Hz~1500Hz[2]
Voltage	M Accuracy type：0.1%rd@0.1Hz~5Hz[1]， 0.1%rd@DC，5Hz~1500Hz[2]
Voltage	L Accuracy type：0.2%rd@0.1Hz~5Hz[1]， 0.2%rd@DC，5Hz~1500Hz[2]
Current	H Accuracy type：0.05%rd@0.1Hz~5Hz[1]， 0.05%rd@DC，5Hz~1500Hz[2]
Current	M Accuracy type：0.1%rd@0.1Hz~5Hz[1]， 0.1%rd@DC，5Hz~1500Hz[2]
Current	L Accuracy type：0.2%rd@0.1Hz~5Hz[1]， 0.2%rd@DC，5Hz~1500Hz[2]
Power	H Accuracy type0.05%rd@Power factor=1；Nominal voltage、Nominal current；Fundamental frequency：45~66Hz[2]
Power	M Accuracy type0.1%rd@Power factor=1；Nominal voltage、Nominal current；Fundamental frequency：45~66Hz[2]
Power	L Accuracy type0.2%rd@Power factor=1；Nominal voltage、Nominal current；Fundamental frequency：45~66Hz[2]
Power	H Accuracy type：0.1%rd@Power factor：0.2~1；Fundamental frequency：0.1Hz~5Hz[1] 0.1%rd@Power factor：0.2~1；Fundamental frequency：DC，5Hz~1500Hz[2]
Power	M Accuracy type：0.2%rd@Power factor：0.2~1；Fundamental frequency：0.1Hz~5Hz[1] 0.2%rd@Power factor：0.2~1；Fundamental frequency：DC，5Hz~1500Hz[2]
Power	L Accuracy type：0.5%rdd@Power factor：0.2~1；Fundamental frequency：0.1Hz~5Hz[1] 0.5%rd@Power factor：0.2~1；Fundamental frequency：DC，5Hz~1500Hz[2]
Power	H Accuracy type：0.2%rd@Power factor：0.05~0.2；Fundamental frequency：0.1Hz~5Hz[1] 0.2%rd@Power factor：0.05~0.2；Fundamental frequency：DC，5Hz~1500Hz[2]
Power	M Accuracy type：0.5%rd@Power factor：0.05~0.2；Fundamental frequency：0.1Hz~5Hz[1] 0.5%rd@Power factor：0.05~0.2；Fundamental frequency：DC，5Hz~1500Hz[2]
Power	L Accuracy type：1%rd@Power factor：0.05~0.2；Fundamental frequency：0.1Hz~5Hz[1] 1%rd@Power factor：0.05~0.2；Fundamental frequency：DC，5Hz~1500Hz[2]
Frequency measurement accuracy	0.02%rd@0.1Hz~1500Hz
Isolation voltage	2*UN+1kV@50/60Hz，1min
Overload capacity voltage	1.5*UN@10min
Overload capacity current	2*IN@3min