PXe-LC Series AC High Current Calibrator
PXe-110001.2LC
PX Electronics PXe-LC Series AC High Current Calibrators provide a controlled, low-distortion AC current source for calibration, verification and electrical test applications.
The PXe-110001.2LC provides adjustable output from 2 to 120A AC, with programmable frequency from 40 to 500Hz and up to 10V available across the connected test circuit. Linear amplification technology provides a clean sine-wave output for applications where stable high current and waveform quality are important.
The PXe-LC Series is suited for testing and calibrating current sensors, current transformers, shunts, ammeters, current probes, and other current-measurement equipment. It can also be used as a programmable high-current AC source for transformer testing, relay verification, R&D and automated test systems.
Unlike a general AC power supply, the PXe-LC is designed for controlled current generation at low output voltage, making it particularly useful for calibration benches and electrical laboratories that work with current-measurement devices.
Technical Highlights for High Current Calibration
2 to 120A AC Current Output
Provides adjustable high-current output for calibration and verification of current sensors, current transformers, probes, ammeters and other low-impedance current-measurement circuits.
40 to 500Hz Programmable Frequency
Supports calibration at standard 50Hz and 60Hz frequencies together with wider-frequency testing up to 500Hz, including specialist 400Hz applications.
Linear, Low-Distortion Current Source
Linear amplification provides controlled sine-wave generation without a conventional PWM output stage, with published THD of 0.8% with a resistive load.
Fine Current Resolution with 10V Compliance
A current resolution of 0.001A supports precise test-point adjustment, while up to 10V compliance voltage is available to overcome the combined impedance of the device under test, leads, and test fixture.
Integrated Measurement & Remote Control
Front-panel indication provides voltage, current, RMS current, frequency, power and power factor, with built-in RS485 Modbus for automated calibration rigs, production test systems and laboratory control software.
Product Information
High-Current AC Calibration and Verification
The PXe-LC Series is intended for applications where a controlled AC current must be passed through a measurement device or test circuit.
A typical setup may consist of the PXe-LC current source, the device under test and a suitable reference measurement instrument. The applied current can then be compared with the reading or output produced by the device under test.
This arrangement can be used when checking:
- Current transformers
- AC current probes
- Clamp meters
- Current transducers
- Ammeters
- Current shunts
- Power and energy measurement equipment
Where formal calibration uncertainty is required, the complete measurement system should include an appropriate traceable reference and a defined calibration procedure.
PXe-LC Current Calibration Configuration
The PXe-110001.2LC is a single-phase AC high-current source designed for laboratory, calibration and production test environments.
The required current and frequency are set according to the device under test. The complete test-loop impedance must remain within the voltage capability of the calibrator.
Available Configuration
| Parameter | PXe-110001.2LC |
|---|---|
| Current Range | 2 to 120A AC adjustable |
| Frequency Range | 40 to 500Hz programmable |
| Frequency Resolution | 0.1Hz setting increments |
| Maximum Output Voltage | 0 to 10V AC |
| Waveform | Pure sine wave |
| Source Technology | Linear amplification |
| Current Resolution | 0.001A |
| Local Measurement | Voltage, current, RMS current, frequency, power and power factor |
| Remote Interface | RS485 Modbus |
| Input Supply | 230V AC ±10%, single-phase, 47 to 63Hz |
Understanding the 10V Output Limit
The available current depends on the impedance of the complete test circuit.
The calibrator must provide enough voltage to drive the selected current through:
- The device under test
- Test leads
- Connectors
- Terminals
- Reference shunts where used
- Any additional series impedance
For this reason, short low-resistance test leads are preferable at higher currents.
Ordering the PXe-110001.2LC
The standard configuration is:
PXe-110001.2LC
1.2kVA | 230V single-phase input | 0 to 10V AC | 2 to 120A | 40 to 500Hz
Information Required for Application Review
| Requirement | Information to Provide |
|---|---|
| Test Application | Transformer, relay, breaker, cable, busbar, sensor or other device under test |
| Required Current | Minimum, normal and maximum AC test current |
| Required Voltage | Expected voltage required across the complete test circuit |
| Test Frequency | Required operating frequency between 40 and 500Hz |
| Duty Cycle | Continuous operation, timed current injection or repeated production test |
| Load Characteristics | Resistance, impedance, inductance or other known electrical characteristics |
| Test Leads | Required length, cable size and connection method |
| Remote Control | Local operation or RS485 Modbus integration |
| Test Documentation | Calibration, factory testing or project-specific documentation requirements |
RS485 Modbus
The standard communication interface provides RS485 Modbus connectivity for integration with external control or data-acquisition systems.
High-Current Test Leads
Where PX is required to supply output leads, the required length, current rating, termination and test fixture should be defined before manufacture.
Factory Testing
Application-specific operating points can be agreed for factory verification where the intended load characteristics are known.
Calibration Requirements
Where the equipment forms part of a controlled laboratory or production test system, required calibration documentation should be stated when ordering.
The source documentation does not define alternative interfaces, IP ratings or alternative output ranges, so I would not advertise those as standard options until PX has confirmed them.
PXe-110001.2LC Technical Specification
| Specification | PXe-110001.2LC |
|---|---|
| Capacity | 1.2kVA |
| Phase | Single-phase input / single-phase output |
| Input Voltage | 230V AC ±10% |
| Input Frequency | 47 to 63Hz |
| Output Voltage | 0 to 10V AC adjustable |
| Output Current | 2 to 120A adjustable |
| Output Frequency | 40 to 500Hz, programmable in 0.1Hz steps |
| Circuit Mode | Linear amplification technology |
| Voltage Regulation | ±0.1% |
| Load Regulation | ±0.5% |
| Frequency Regulation | ±0.01%* |
| Waveform | Pure sine wave |
| Total Harmonic Distortion | 0.8% at resistive load |
| Voltage Resolution | 0.1V |
| Frequency Measurement Resolution | 0.01Hz |
| Current Resolution | 0.001A |
| Voltage Measurement Accuracy | 0.5% FS + 5 digits |
| Current Measurement Accuracy | 0.5% FS + 5 digits |
| Power Measurement Accuracy | 0.8% FS + 5 digits |
| Frequency Measurement Accuracy | 0.01% FS + 5 digits |
| Voltage Setting Accuracy | 0.5% FS |
| Frequency Setting Accuracy | 0.1% FS |
| Display | Voltage, current, RMS current, frequency, power and power factor |
| Communication | RS485 Modbus |
| Protection | Overcurrent, overtemperature, short circuit and overload |
| Enclosure | IP20 |
| Operating Temperature | 0°C to 40°C |
| Relative Humidity | 20% to 95% RH |
| Dimensions | 430 × 550 × 440mm |
| Weight | 60kg |
Yes. The PXe-LC includes RS485 Modbus communication for integration with computers, PLCs and automated test equipment.
This allows it to be incorporated into automated calibration benches, production test systems and repeatable laboratory test sequences.
Yes. The PXe-LC can provide the controlled AC current required for testing and calibrating suitable current sensors, transducers, probes and measurement devices.
Where formal calibration accuracy or uncertainty is required, the PXe-LC should be used as part of a measurement system with an appropriate traceable reference instrument.
Yes. Its 2 to 120A AC output makes it suitable for current transformer testing where the required primary current and test-loop impedance are within the output capability of the unit.
For precision CT ratio or phase-error calibration, additional reference measurement equipment would normally be required.
The published specification gives current measurement accuracy of 0.5% FS + 5 digits and current resolution of 0.001A. It does not currently provide a separate guaranteed current-source setting accuracy or calibration uncertainty.
For applications requiring defined calibration uncertainty or traceability, the required accuracy should therefore be confirmed with PX Electronics and the unit used with an appropriate reference measurement system where necessary.
I would definitely keep that final FAQ. It is unusually useful because it answers the technical question a calibration engineer is likely to ask immediately, while avoiding overstating the PXe-LC’s present published specification.
The PXe-110001.2LC provides an adjustable AC current output from 2 to 120A, with a published current resolution of 0.001A.
The required test current must be achievable within the available 0 to 10V output capability and the impedance of the complete test circuit.
Output frequency is programmable from 40 to 500Hz, allowing operation at common 50Hz and 60Hz test frequencies as well as 400Hz and other frequencies within the available range.
This makes the unit useful for checking current-measurement devices intended for different AC power systems.
An AC high current calibrator provides a controlled AC current source for testing, verification and calibration applications.
The PXe-LC Series is designed for applications where substantial current must be generated at relatively low voltage, such as testing current sensors, current transformers, current probes, ammeters and other current-measurement equipment.
The PXe-LC uses linear amplification technology to generate its AC output rather than a conventional PWM switching stage.
This supports a clean sinusoidal waveform, with published total harmonic distortion of 0.8% at resistive load, which is useful where source waveform quality could influence the device being tested or measured.
The PXe-LC Series provides a programmable high-current AC source for laboratory, calibration and electrical test applications.
Typical uses include current sensor verification, current transformer testing, current probe and ammeter checks, current transducer testing, relay current injection, transformer testing and automated production test systems.
A current source requires sufficient voltage to drive the selected current through the impedance of the complete test circuit.
The PXe-LC provides up to 10V AC. The device under test, test leads, connectors, terminals and any reference shunt all contribute resistance or impedance, so these must be considered when operating at higher currents.
