This product is suitable for AC 50HZ, voltage 6KV or 10KV, 1050KW capacity of not more than three-phase asynchronous squirrel-cage induction motor start-stop control single irreversible .
The product performance meets the GB11022-89 " high-voltage switchgear general technical conditions" , the relevant provisions of GB3906-91 "3-35KV AC metal -enclosed switchgear equipment" and other standards.
1.2 products can work reliably under the following conditions :
1.2.1 Maximum ambient air temperature does not exceed +40 ℃, the minimum of not less than -5 ℃.
1.2.2 The maximum temperature of around 24 hours the average temperature does not exceed 35 ℃.
1.2.3 installation site altitude does not exceed 1000m.
1.2.4 The monthly average air humidity less than 90% ( average temperature of +25 ℃).
1.2.5 without blasting dangerous medium, the medium does not enough to corrode metal and gas and conductive dust damage the insulation .
1.2.6 No severe vibration or vertical gradient of not more than 5 ℃ place.
1.3 Model and Its Significance
LQZ - 6 / □ - □
┃ ┃ ┃ ┗ ━ charged with motor power KW
┃ ┃ ┗ ━ ━ ━ control voltage AC110V or AC220V
┃ ┗ ━ ━ ━ ━ ━ ━ rated working voltage of 6:6 KV 10:10 KV
┗ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ high voltage squirrel cage motor starting control cabinet
1.4 Technical data ( see Table 1 )
① nominal stator voltage AC6KV 50HZ, AC10KV 50HZ
② maximum rated current of 100A Stator
③ equipped with a motor maximum capacity 1050KW, three-phase squirrel cage induction asynchronous motor
2 Product Structure
2.1 Control cabinet welded angle iron and sheet metal bending from the rear side is open ( according to user requirements can be added back door ) , either alone or arrange installation , the cabinet has a high-voltage electrical equipment room, a low-pressure chamber components , instrumentation signal room front door is equipped with instruments and lights , etc., equipped with the power switch and starting secondary circuit low voltage components on the lower part of the chamber door , the stop button on the right side door with a vacuum interrupter ( contacts ) observation hole , compact the entire structure , reasonable ( Figure 1 ) .
2.2 start control cabinet dimensions ( see Figure 1 ) .
2.3 starter cabinet main electrical components by the high-voltage isolation switch, high voltage fuse , high voltage vacuum contactors, high voltage current transformers, reactors and other high-voltage electrical starter components.
3 starting performance
3.1 Main elements starter reactors DK, for large AC motor voltage starting . Start-up, reactor in series with the motor , the starting end of the reactor is short-circuited , the motor directly connected to the grid . Starting reactor continuous working time should not exceed two minutes and can not be shorted reactor during start-up time , 3HL lamp is not lit, the reactor continuous working time of two minutes , then you must press the stop button on TA, so 1KM, 2KM off avoid prolonged DK reactor connected to the circuit due to overheating and burn.
3.2 Short-circuit and overload protection : by the second current transformer secondary current difference in the two-phase wiring , used for streaming relay GL-12/10 inverse time protection , a separate thermal overload relay for RJ and lack of protection .
4 operation and use
After 4.1 product installation is complete, before use by electrical schematics ( see Figure 2 ) review the wiring is correct.
4.2 is correct , then check the actual capacity of the motor control are consistent with the provisions of Table 3 by setting a good current relay LJ 's current value.
5 Ordering Information
Must indicate when ordering :
a. motor detailed models, specifications , rated capacity and the number of poles.
b. use and the use of the voltage .
c. Stator current , starting current, starting torque .
d. quantity orders.