• SMC PTE-50-CET three-phase relay test set


Three phase relay test set

The PTE-50-CET equipment is a universal, portable, test system with three outputs to test single and three phase protective relays. The equipment comprises of three independent output channels that can be selected as current or voltage. This enables the unit to be used as a complete single-phase equipment (voltage, current, and phase angle between them) or, with channels synchronised, as a three phase current or three phase voltage 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-50-CET 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.


  • Variable three phase Current up to 3 x 50A or Voltage up to 3 x 150V.
  • Variable phase angle between 0 – 359.9° (Single or three phase).
  • Harmonic selection independent by phase, up to the 7th harmonic.
  • Output power: 3 x 100VA.
  • Reversible outputs.
  • Outputs are fully isolated and electronic.
  • Dynamic capability.
  • Completely programmable.
  • Built-in Timer, 1ms resolution.
  • Dimensions: 200 x 442 x 327 mm/25 Kg 8 x 18 x 13 in./ 52 lb.

Secondary Injection

PTE-100-V PTE-100-C
PTE-300-V PTE-50-CE
PTE-300-V PTE-100-C
PTE-50-CET PTE-100-V
Number of output channels11122334446
Reversible Outputs (voltage or current)-
Maximum voltage outputs11133224446
Maximum current output11133224446
Maximum voltage reached250 V150 V300 V300 V150 V300 V300 V300 V300 V300 V300 V
Maximum current reached250 A50 A8:00 AM8:00 AM50 A (150 A with 3 channels in paralel)50 A250 A50 A250 A50 A (150 A with 3 channels in paralel)50 A (150 A with 3 channels in paralel)
Possibility of external frequency and phase synchronization-Only PTE-100-VOnly PTE-300-V-
Isolated outputs-
Manual Control-
Software Control-
Output power per phase1000 VA100 VA100 VA100 VA100 VA (300 VA with PTE-SER option)100 VA100 VA100 VA100 VA100 VA (300 VA with PTE-SER option)100 VA (300 VA with PTE-SER option)
Harmonic Generator-Up to7thUp to7thUp to7thUp to7thUp to7thUp to7thUp to7thUp to7thUp to7thUp to7th
Frequency Gererator--40-420 Hz40-420 Hz-40-420 Hz40-420 Hz40-420 Hz40-420 Hz40-420 Hz40-420 Hz
Reproductor of faults and transients----------
Simulation of dynamic faults  manually-Only PTE-100-VOnly PTE-300-V-
Simulation of Frequency Ramping  manually-X—XOnly PTE-100-VOnly PTE-300-V-
Auxiliary AC Voltage Output-
Auxiliary DC Voltage Output(with PTE-FCG option)(with PTE-FCG option)(with PTE-FCG option)(with PTE-FCG option)(with PTE-FCG option)(with PTE-FCG option)-
Number of Inputs12112323223
Phase Angle Range0-180º (with PTE-FCC option)0-360º0-360º0-360º0-360º0-360º0-360º0-360º0-360º0-360º0-360º
Phase Angle Resolution0,2º (with PTE-FCC option)0.1º0.1º0.1º0.1º0.1º0.1º0.1º0.1º0.1º0.1º
  • Testing of three phase motor protection relays.
  • Testing of three and single phase overcurrent and differential protection relays.
  • Can be used as a complete single phase unit in voltage, current, and phase as outputs are reversible (V, I, j ).


SMC PTE-SER current output series interconnections


SMC PTE-FCF adjustable voltage option for PTE-100-C


SMC PTE-FCG auxiliary DC supply

Secondary Injection Products