The main products

Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, machinery, electronics, automobile manufacturing, tobacco, plastics machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution and so on.

3ASC25H219B DATX133 Digital output module

To test the phase sequence, set every phase separately to the rated value and then check the value on the LC display screen. At the end reset the phase to zero. Generate one symmetrical system each for current and voltage with the rated values. Check the calculated values. A three-phase current and voltage tester is recommended to test the power. By changing the phase angle between the current and the voltage system the calculation of reactive and effective values and of cos ϕ can be checked.

Recording the test settings To monitor the test of the correct direction of the specific protective functions in comparison with the measured power and power factors in the event of a later primary test, the following information should be documented in the secondary tests: Directional setting of the test set Measurement of the effective and reactive power and of the cos ϕ factor Directional setting of the measurement and protective functions

Testing the protective functions

 To ensure that no damage has been caused by transport or setup and installation of the protection equipment and systems, secondary tests are run on the REF542plus protection and control unit with the configured protective functions.Secondary function tests are recommended during commissioning of the protective functions. The activated and configured automatic auto reclosure and also other functions of the complete system and the power circuit-breaker should be tested to ensure safe operation of these functions. The following points are particularly important for protective functions that must work in connection with a set direction or energy flow quantity. Checking the sensor and transformer connections and wiring check of the station circuit diagram Determining the transformer direction Connection and documentation of the test set Testing and documentation of the measured value recording Setting parameters for the protective functions

Troubleshooting 

In this chapter you will find information on Self test of the Central unit Self test of the HMI By means of the self test the proper function of the REF542plus can be checked. It is to be recommended that the self test is done in uninstall condition of the REF542plus. At least no connection to the primary system should be left. Beside that, the upgrade the firmware will also be described. 6.1 Safety Information If there is any doubt regarding the treatment of a message, please check with our service representative. 6.2 Required devices and facilities 6.2.1 Sinusoidal generator The generator must have the following features in case of using the analog inputs of the REF542plus with current and voltage transformers:
Accuracy class: 0.5
Current output : 1 respective 5 A 50 Hz AC minimum
Voltage output: 100 V 50 Hz AC minimum
Voltage output: 2 VRMS 50 Hz AC