SMC PTE-300-V - Three-phase Relay Tester

The PTE-300-V equipment is a universal, portable, test system with three outputs to test single and three phase protective relays.

The equipment compromises of three independent output channels than can be selected as voltage or current. This enables the unit to be used as a complete single-phase equipment (Voltage, Current, and phase angle between them), or with channels synchronized, as a three phase voltage or three phase current generator from a single phase mains input. The unit is extremely compact and rugged. The design incorporates the latest in modern digital microprocessor technology to achieve unbeatable output characteristics in terms of power, accuracy, low distortion, and dynamic capability.
This technology allows users to test many different specific functions required in relay testing, without the need of additional accessories. All output signals are digitally generated, amplified, and internally controlled by the IGM’s (Intelligent Generator Modules), which interpret the orders received from the front panel to produce a highly accurate, stable, and low distorted output, independent of the voltage supply.

The equipment also allows optional connection to a computer for either automatic testing of relays or control of the equipment using Windows compatible software. Even the adjustment and calibration of the equipment is made by software, supplied with the units, which permits calibration and/or adjustments in the outputs, without any manual hardware setting. (Closed Case Calibration) In summary, the PTE-300-V is an equipment which offers all the characteristics and functions needed for protective relay testing, in a manual or automatic mode, and in laboratory and/or for on site testing.

Electronic PTE Test Equipment Range

The electronic PTE test equipment range has been designed for maximum efficiency and simplicity when testing protective relays in the field. These universal, rugged and powerful units provide the required accuracy and performance to test any electromechanical, static, or numerical relay. Output waveforms are digitally synthesized, and completely isolated from the mains supply. The signal is then electronically amplified to attain up to 50 A or 300 V with an effective power of 100 VA.

Flexibility

The range includes four products: the PTE-300-V, with three output channels, and the smaller PTE- 100-V, with one channel only, are mainly designed for voltage-related protections like generator, motor and synchronizing relays. The other two (PTE-50-CET and the one-channel version PTE-50-CE) are specially powerful in current-based testing.

Each output channel in these units can be switched between current and voltage injection by just pressing a button. Amplitude and phase angle can also be adjusted independently in each channel. One of the biggest advantages in the PTE sets is their ability to communicate to each other, in order to use all their output channels simultaneously. You can purchase several simple units for the most frequent testing and, when time arrives for more demanding tasks, interconnect two or three according to the application’s requirements. This is a cost-effective solution when you need more than one test set.

Furthermore, the PTE units can also be used in combination with equipment from other manufacturers, thanks to their built-in external synchronization input.

Need computer-generated reports? Not only does the PTE range feature the best manual control board in the market, but also the possibility to operate automatically under the control of optional software from a standard computer. This capability is especially useful when a great number of different protections must be tested periodically. Relay types and test routines are stored in a custom-defined database, so that you only need to double-click on each installed relay’s entry to perform the complete test process and to save and produce a report in a fully unattended manner. The automatic testing software can also control combinations of several PTE units as if it was a single device.

Power

Behind the 100-VA output power in the PTE channels, you will find a generous duty cycle and a great number of test resources. For example, several channels can be controlled from a single button, even if they belong to various interconnected units, thanks to the master/slave function. And you can refer the phase angle of each channel or the base frequency of the harmonics function to an incoming signal from an external generator, or setup ROCOF frequency ramps in less than one minute without a computer.

The PTEs feature an idle power mode to save energy and keep the amplifiers cool when testing low impedance relays. Each output channel provides an independent neutral, which enables the interconnection of two or more channels in series or in parallel with absolute freedom. The optional PTE-SER plug allows the injection of up to 50A with a compliance voltage of up to 60V in the PTE-50-CET.

Applications

• Testing of three and single phase Generation and Interconnection Relays.
• Combined with a single phase Current injection set, allows relay tests which require three phase voltage.
• Can be used as a complete single phase unit in voltage, current, and phase as outputs are reversible (V, I, j )