The SDN-414 series is an inductive-free shunt designed for wide-bandwidth operation and is suitable for both AC and DC power systems, especially where phase angle and transmission delay are considerations, which are critical in impedance measurement and power calibration systems. Useful for increasing or expanding the current range of power analyzers, power meters, phase angle meters, frequency response analyzers, and multimeters. The SDN-414 Series Phase Angle Meter can be used to measure voltage, voltage current, or phase angle between currents, making it ideal for phase protection relays, energy meters, and current transformer calibration.
CVRs are rugged high-frequency resistors designed to sustain very high peak power and current inputs generated by capacitor banks, pulse generator systems, and steady-state current loads. Their linear response over a wide frequency band provides an accurate indication of the current magnitude of inductive components. The essence of CVR design is the coupling between key electrical parameters such as resistance, bandpass, energy capacity, and power rating. This means that we offer a wide range of standard units covering a wide range of specifications.
Power rating
Although most CVRs are primarily used for inrush current measurement, their robust construction and low-temperature coefficient resistive elements make them ideal for many steady-state applications. Therefore, the average power rating for continuous current loads is quoted for each resistor family. In circuits involving AC or high duty cycle pulse currents, care should be taken not to exceed this rating, as overheating can cause CVR damage. If required, we can provide resistors with special structures that increase the standard power rating to a higher value depending on the model.
Frequency response
The bandpass of the CVR is basically flat from DC to the upper limit, which is mainly determined by the skin-like effect in the resistive element. Correlation bandpasses are based on the measured 10% to 90% rise time in response to the current step function generated by the coaxial pulse generator. The test pulse has a di/dt of more than 10^12 amps/sec.
Resistance value
Unless otherwise specified, the resistor has a resistance tolerance of ±4% of the nominal value. In addition, each unit is equipped with a Kelvin bridge that is accurate to ±0.2% resistance. We can offer a wide range of special resistance values for any standard unit.
Mechanical design
The housing structure of the fully coaxial CVR is silver-plated brass. Standard output signal connectors are BNC and other available connectors. The large coaxial CVR is connected with a high-current flange and a coaxial threaded stud input. Powertek's flat configuration CVR, W series, originally developed for flat panel transmission line installations and available in a variety of unit width and input configurations, has been found to be particularly useful in applications requiring resistors with extreme energy and power ratings.
Global traceability
All measurements made with the CVR series SDN-414 shunt are traceable to national and international standards; Measurement standards through Powertek. All CVR Series SDN-414 converters are equipped with the required certificates of conformity to meet quality assurance standards, such as: IEC17025/ISO9001. Independent measurement certification is possible with UKAS, A2LA or Z540/NAVLAP certificates.
Application of CVR in parallel with non-inductive coaxial current
Pulsed current applications
Calibration laboratory
Phase meter current sensing
Single-phase angle indicator V-A
Three-phase phase angle indicator V-A
Power factor table
High Frequency Energy Meter
Broadband power meter
Power analysis
Current transformer calibration
Current probe phase delay characteristics
Triac current measurement
Current control of automatic welding machines
Measure the output of your car's alternator
Fault current detection for alternator bearing wear
Electron beam welding
Current detection in detonation systems
Three-phase fault test of transmission substation
Modulator fault detection
Measurement of lamp current in laser systems
Electric vehicle IGBT chopper current control
Circuit breaker test
SDN-414-01 SSDN-414-01 SPT-414-01 SDN-414-025 SSDN-414-025 SPT-414-025 SDN-414-05 SSDN-414-05 SPT-414-05 SDN-414-10 SSDN-414-10 SPT-414-10