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Download SERVICE CASE FOR TESTS OF CURRENT LOADS
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SERVICE CASE FOR TESTS OF CURRENT LOADS TECHNICAL AND OPERATIONAL DOCUMENTATION 1. APPLICATION The service case was designed for special demand of groups occupied with startup of electric power stations. The range of cases includes a range of necessary functions that optimize the startup and commissioning work. The W-24A service case is designed for testing loads of current and voltage transformers. The voltage transformer circuits of substations have to work under load. Lack of appropriate load causes the transformers to operate in inappropriate accuracy class, thus making the energy meters calculate the values wrongly. The W-24A case allows the measurement of circuit loads and in case of lack of appropriate load the calculation of resistance values to be applied in order to load the circuits appropriately. The transformer circuits can be loaded with the special RD3X50W resistors made by Energoaparatura. 2. CONSTRUCTION The faceplate of the W-24A case is presented in fig. 1. The W-24A case contains: three 500VA autotransformers, three 100VA current transformers, three phase current and regulated voltage meters, three 58V, 10A grid transformers, three overcurrent protectors, a cutoff switch for the current circuit, measurement and power supply cables. Fig. 1. Faceplate of the W-24A case DTR RNTr-1_02.2014 2 The W-24A service case is equipped with three 500VA autotransformers. The setting range for voltages is from 0 to 260V AC. Their use is optional. The case allows for simultaneous supply of three currents (0-15A AC) and three voltages (0-250V AC). The faceplate features a three phase meter for displaying the current values of regulated voltage and current. The service case is also equipped with a 3x58V AC (100V AC interphase voltage) phase voltage source. This voltage is used to apply 100V AC to the measurement circuits of e.g. power consumption meters. On customer demand there is also the possibility of manufacturing a device for a different voltage. WARNING! All measurements conducted with the use of W-24 case shall be conducted pursuant to safe work practice guidelines for Low Voltage operating devices. 3. STARTUP The three phase voltage shall only be connected with use of the safe laboratory cables provided with the case. Before applying the voltage set the autotransformer dials to the 0V position. In case of break in the circuit switch the circuit off with the “PRĄD” marked switch. During load testing it is also possible to check the sequence of the phases. In order to perform that switch the subsequent phases with the S-type safety located on the front side of the case. This safety also switches off the 58V AC circuit. The current measurements shall be performed with use of test pincers. TECHNICAL DETAILS Inputs Supply voltage 4. Supply voltage UN UN = 3 x 230V AC Permissible voltage range 0.8xUN to 1.2xUN Power consumption Less than 3x550W Input connectors 16 DTR W-24A_02.2014 3 Insulation General data Rated voltage 350V Electric strength 2.5kV; 50 Hz; 1 min. Case protection grade IP-41 External dimensions 406/330/174 Ambient humidity Less than 95% Operating temperature range From -5oC to 45oC Mass in service 15kg Tab. 2. Technical details 5. CE MARKING The CE marking was performed in 2013. The marking is placed on the rating plate on the lid of the case. The rating plate is shown on figure 3. The rating plate includes the basic parameters of the W-24A service case. Fig. 3. Rating plate of the W-24A service case 6. SERVICE The devices manufactured by Energoaparatura SA are subject to standard, two-year warranty period. The warranty and post-warranty services are provided in the premises of the Energoaparatura SA company in Katowice. DTR W-24A_02.2014 4 7. PROCEDURE FOR WASTE MANAGEMENT OF USED ELECTRONIC DEVICES. Pursuant to the 29 July, 2005 used electric and electronic devices Act (Journal of Laws “Dz.U.” No. 180, item 1495) the used product shall be returned to the Energoaparatura SA company or to a company providing utilization services for electronic waste. 8. FURTHER CUSTOMER INFORMATION In technical matters : In sales-related matters: Jacek Gumul Head of Electronics Department tel. +48 32 728 55 73 [email protected] Marta Szpaczyńska Marketing Specialist tel. +48 32 728 54 05 [email protected] DTR W-24A_02.2014 5