Mitsubishi Electric MELPRO-A Series Instruction Manual
Over voltage relay
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- Instruction manual (24 pages) ,
- Instruction manual (19 pages) ,
- Instruction manual (20 pages)
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Summary of Contents for Mitsubishi Electric MELPRO-A Series
- Page 1 Request Ensure that this Instruction Manual is delivered to the end users and the maintenance manager. JEP0-IL9557...
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Page 2: Safety Precautions
－ Safety precautions － Before installation, operation, maintenance, and inspection, please be sure to read this instruction manual and all other attached documents thoroughly in order to work safely with the equipment. Please ensure that you fully understand the equipment, safety information, and precautions that need to be taken before working with the equipment. -
Page 3: Maintenance And Inspection
＊The equipment must only be operated and handled by qualified personnel. Otherwise, there are risks of electric shock, injury, failure, malfunction, and maloperation. ＊Handling and maintenance of the equipment must only be carried out after gaining a thorough understanding of the instruction manual. - Page 4 MITSUBISHI ELECTRIC CORPORATION prior to such applications. If the user applies MITSUBISHI ELECTRIC CORPORATION products to such applications without any contact to our technical section, MITSUBISHI ELECTRIC CORPORATION shall not be liable for any items and not be insured, independently from mentioned in this clause.
- Page 5 5. Onerous repair term after discontinuation of product (1) MITSUBISHI ELECTRIC CORPORATION shall accept onerous product repairs for 7 years after production is discontinued. (However, the product which was made over 15 years is recommended to replace.) (2) Product supply (including repair parts) is not available after production is discontinued.
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Page 6: Ratings And Specifications
1. Alert function which detects the difference between 4. The power supply can be derived from VT secondary. setting frequency and injected frequency. 5. Panel cutout is the same as previous MELPRO-A series 2. The fault value record function is installed. and E series. - Page 7 Characteristics Item Characteristics Ambient temperature: –20 to +60℃ (Under the state where dew condensation or freezing does not occur) Relative humidity: 30 to 80% on daily average Standard use Altitude: 2000m or lower conditions ・The state where abnormal vibration, shock, and inclination are not applied. ・The state where it is not exposed to harmful gas, excessive dust, and water droplet or vapor.
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Page 8: Operating Description
Structure Test button RUN indicated LED (Green) By turning the indicator select It shows the result of self- switch to "TEST" and pushing monitoring. It lights up in "TEST" button for 2 seconds or normal condition. more, output contact can be Numerical display LED forced to operate (except for Following item is displayed... -
Page 9: Internal Connection Diagram
③Setting value ②Clearing of fault records It displays the setting condition of the relay Set indicator select switch to "CLEAR FAULT REC." including operation value, operating time, and and hold for 5s or more, then Ｏ.Ｋ. is displayed frequency. and all of the fault record are cleared. 4. -
Page 10: Handling Precautions
External connection diagram (Example) VT from power side MOV-A3V To alarm circuit Voltage tripping coil 52a Pallet switch ●Connect line. Fig. 5-3 External connection diagram Handling precautions 1. Panel mounting if the setting change is unavoidable, please press the ①The relay of unit-drawer type (RD type) can be drawn CPU reset button in order to lock the relay function. - Page 11 Test 3. Operation characteristics test A relay test is carried out sufficiently before shipment, but at the following cases, it is recommended the test ①When the rated voltage is applied, the RUN display LED should be carried out again. (green) lights up. This indicates that the relay works a.
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Page 12: Terminal Layout
Terminal layout × × × × ○ × × × × ○ × × × MOV-A3V-R MOV-A3V-RD Do not connect to the "×" terminals, or the relay may not operate properly. The "○" terminal is junction terminal for grounding wire if there was grounding wire in the existing relay. - Page 13 1. Procedure of drawing out Cover Drawer fixing screw ① Open the cover and remove the ② Close the cover and pull out the ③ Support the frame of subunit and drawer fixing screw. subunit with your finger hooked pull out. on the drawer handle on both sides.
- Page 14 Handling of the cover 1. Opening and closing Please open the cover by placing your fingertip on the convex part in the right side of the cover as shown in Fig. 5-6. Fig. 5-6 2. How to replace the cover ･Removing the cover Open the cover, and lightly push up the upper side of the cover from the inner surface.
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Page 15: External Dimensions And Panel Cut-Out
External dimensions and Panel cut-out φ140～φ142 2-φ7 hole Minimum pitch Fig. 5-8 MOV-A3V-R (Unit: mm) Same as the center of panel cut-out φ140～φ142 2-φ7 hole Minimum pitch Fig. 5-9 MOV-A3V-RD (Unit: mm) Improvement on the reliability of protection function Any parts and materials applied to the protection relay have limited lifetime which will bring the degradation to the relay. - Page 16 HEAD OFFICE ： 7-3 MARUNOUCHI 2-CHOME, CHIYODA-KU TOKYO, 100-8310, JAPAN First edition: Jan. 2021...