First, the test aims to solve the continuous production line in Jinan Iron and Steel, due to lightning, short circuit, reclosing, etc. caused by the power supply system instantaneous loss of pressure, loss of electricity (commonly known as Akira) lead to a large area contactor tripping problems.
Second, anti-sway electrical products use FS / E series products for anti-swing test
1. FS/E anti-swing electric AC contactor
2. FS-MD/E or FS-MDII/E delay module
3, FS-ZD / E restart controller III, test requirements
1. The current impact on the power grid must be minimal to ensure the safety of the power grid.
2, the most economical, safest and most reliable.
3, the transformation of the line is the simplest, the least changes.
IV. Test time, place and equipment
On June 21, 2006, Jinan Steel Production Department organized the 241 inner ring pump (motor power is 132Kw, voltage 380V) and water supply 4 workshop filter 2# pump (power of motor is 37Kw, voltage 380V) Anti-swing electrical simulation test.
Fifth, participate in the test unit
1, Jinan Steel Production Department
2, Jinan Steel Equipment Department
3, Jinan Power Plant Electric Instrument Workshop
4, Shandong Metallurgical Research Institute
Sixth, test content
1. The SF400/E type contactor is used for anti-swing test on the 241 inner ring pump. This motor is a direct start method. The original circuit contactor of this circuit is Schneider LC1-D410M5C type. After the contactor coil is sucked, the DC circuit is maintained by the internal circuit. The working principle of the contactor coil is not suitable for installing the delay module to solve the problem of anti-shudder. Therefore, we use the anti-sway The scheme of replacing the original contactor with the FS400/E type contactor was tested (this scheme is based on the breaking of the secondary circuit to simulate "shocking").
1 Overview
FS/E series anti-sweeping AC contactor for AC 50Hz, 60Hz, rated working voltage to 1140V, connecting and breaking circuit, for continuous production line due to lightning, short circuit, etc. Keep the contactor not tripping. The operation is switched on and off exactly the same as a conventional contactor. When the power failure exceeds the definite time limit, the contactor trips, achieving the goal of avoiding power failure and maintaining continuous production without stopping the machine.
Features and features:
â— Powerful pull-in system: FS/E series anti-slopping electrical contactor (this contactor adopts Schneider contactor housing, plus specially developed coil and delay controller) adopts two sets of coils, fast pick-up speed, strong Powerful, excellent operating characteristics. When the contactor is sucked or released, it is neat, without harmful vibration, avoiding arc welding caused by contact jitter when the grid voltage is lost, thus reducing contact wear.
Silent operation technology, installation angle reaches ±30°
â— The controller is attached to the side of the contactor, with small size and high reliability.
â— Use the principle of power storage to achieve delayed release.
2 wiring schematic
3 Specific test procedure i Mount the FS400/E type contactor (this contactor with a delay controller with a delay of 0.5 and 1 second) to the position of the original Schneider contactor LC1-D410M5C, anti-slopping FS400 The point A3 of the /E contactor is not connected (if there is no A3 point, there is a delay when the stop button is pressed normally).
Ii According to the normal operation procedure, press the start button. The contactor normally pulls in and the contactor is not broken after the stop button is pressed (because pressing the stop button for less than 0.5, 1 second, the contactor will not be disconnected, continue to keep running) .
Iii According to the normal starting operation procedure, pressing the start button can start the motor normally. Press the stop button for more than 0.5 and 1 second, then the contactor will be disconnected.
4 Test results Through the above test, it was proved that the anti-sweeping FS/E type contactor has the effect of preventing "sweeping electricity".
2. The FS-MDII/E type delay module is used for the anti-sway electrical test on the 2# pump prior to filtration. The original contactor is a Siemens contactor. Since the working principle of the contactor coil is to maintain the exchange and exchange, it can be added directly. The anti-skid electrical delay module is used to prevent "shocking" and the motor is a direct start method.
1 Overview
The FS-MDII/E type delay module is specially developed for the enterprise to solve the problem of non-stop operation. The contactor can be tripped by the set time delay when the electric shock occurs.
Features and features:
â— The contactor accurately delays the tripping and effectively resists the "shocking".
â— Make the AC connector silent and energy-saving operation, and the energy saving rate can reach more than 80%.
â— Small size, simple operation, easy installation.
â— When the module fails during the work process, the delay system will automatically exit, the contactor delay and energy saving function will be lost, but it will not affect continuous production. At this point, the buzzer sounds for a long time and is scheduled to be replaced.
â— The delay time is adjustable from 0.3S to 6.6S (0.3S is one step).
â— Cannot be used with DC operated contactors.
2 wiring schematic
3 Specific test procedure i Insert the FS-MDII/E delay module into the control loop. The anti-sloshing delay time is set to 1.5 seconds.
Ii According to the normal operation procedure, the start button is pressed to start the motor normally. If the stop button is pressed, the motor has not stopped (because pressing the stop button for less than 1.5 seconds, the contactor will not be disconnected and continue to operate).
Iii According to the normal starting operation procedure, the start button is pressed to start the motor normally. After the stop button is pressed for more than 1.5 seconds, the contactor is disconnected and the motor stops running.
Iv Set the delay delay time of the delay module to 4.5 seconds.
v According to the normal operation procedure, the start button is pressed to start the motor normally. If the stop button is pressed, the motor does not stop. (Because the time for pressing the stop button is less than 4.5 seconds, the contactor will not be disconnected and it will continue to be turned on).
Vi Press the normal starting operation program, press the start button to start the motor normally. After pressing the stop button for more than 4.5 seconds, the contactor will be disconnected and the motor will stop running.
4 Test results Through the above test, it can be proved that the "shocking power" problem can be solved by using the anti-swing electrical delay module.
3. Manually simulate the motor and restart it before the filter #2 pump. This motor is a direct start method.
FS-ZD/E restart controller 1 Overview The “Shudden†restart controller is used to protect the continuity of production. When the power supply system “shocks electricity†and the running motor is shut down due to the electrical network shaking, such as the power grid When the time allowed to return to normal, the motor will start the motor that has caused the shutdown due to the stun power according to the preset restart time. If the grid does not return to normal within the allowable time, the controller will block the program and will no longer start the equipment. According to the needs, if there are multiple motors at the site that need to be restarted in batches, you can restart in batches by setting different restart times.
Features and features:
â— High-precision timing for accurate restart.
â— You can set the start time and lock-in not-start time, without affecting the normal starting and stopping of the contactor.
â— Record and display the number of starts of the motor and the number of electrical grids.
â— Small size, easy installation, high reliability, strong anti-interference ability.
2 specific test steps i According to the normal operating procedures, press the start button motor normal start operation, motor starting instantaneous current of 510A, starting time of about 2 seconds, after starting the operating current is 60A, the pump outlet pressure of 0.52Mpa.
Ii press the stop button contactor immediately disconnected, press the start button again after about 1 second, the motor restarts, the motor starting instantaneous current is 230A, the starting time is less than 0.5 seconds, the running current is 60A after starting, and the pump outlet pressure during the restart is basically constant.
3 The restart of the test results has little impact on the production process, and has little impact on the power grid, and it can also play a role in preventing “shockingâ€.
VII. Test results It is proved through on-site tests that adopting the above three schemes to solve the “shocking power†of the power supply system is effective and can ensure the continuous production of important power load when “shocking powerâ€.