Test power supply panel (box)

The PGY type relay protection test power supply panel is a product designed and manufactured by our company in accordance with the relevant regulations of the Ministry of Energy's "Power Plant and Substation Engineering and Relay Protection Test Instrument Configuration Quota", "Relay Protection Test Regulations", and the Ministry of Electric Power Industry's "Anti accident Measures for Power System Relay Protection and Safety Automatic Devices". It provides a reliable, stable, and convenient AC/DC test power supply for on-site relay protection testing work, and provides a reliable guarantee for improving the quality of relay protection testing work and ensuring personal and equipment safety.
This equipment is suitable for power plants, substations, and large and medium-sized industrial enterprises, and can be used as a standard relay protection test power supply.

• Product features:
1. Equipped with dual power supply, it can switch between manual and automatic modes. The use of contactors allows for load switching, ensuring the reliability of power supply.
2. The AC power supply adopts a large capacity isolation transformer to isolate the system power supply from the test power supply, and a shielding layer is installed between the primary and secondary to protect the test power supply from transient processes of the power grid and other harmonic interference. The transformer adopts the △/Y0 wiring method, which greatly reduces the third harmonic and ensures the quality of the power supply.
3. DC power supply can continuously and smoothly regulate voltage to meet the needs of different test projects;
4. The control of the AC power supply adopts DZ47-60 automatic switch, which operates quickly, has a long service life, and has the function of short circuit and overload automatic tripping.
5. The output AC power supply is equipped with a leakage protection switch to ensure the safety of the testing personnel. This switch has the advantages of stable performance, high sensitivity, and reliable operation, and has automatic tripping functions for short circuits and overloads.
6. DC circuit breakers are used in DC circuits, which operate quickly, have a long lifespan, and have the function of automatic tripping for short circuits and overloads.

• Technical parameters:
1. Communication section
1.1 Rated input voltage: three-phase 220V/380V, frequency 50Hz.;
1.2 Rated output voltage: 220V/380V, three-phase four wire, with a total of three outputs;
58V/100V， Three phase four wire, with a total of three outputs.
When the three-phase input is balanced, the output imbalance is less than 1%.
1.4 The third harmonic component is less than 3%.
The input transformer has a capacity of 15kVA and a maximum output current of 3 × 22.8A under an eight hour working cycle.
2. DC section
2.1 The power input is AC three-phase 380V;
2.2 Output DC voltage continuously adjustable from 0 to 250V, divided into three output channels;
2.3 The rectifier transformer has a capacity of 5kVA and a maximum output current of 20A under an eight hour working cycle;
2.4 Output DC ripple coefficient K<1.5%.