1、YKJD12 YKJD 12 C23 13345 6 a1 YKJD( YKJD 13)13C( C)a1 YKJD13 C( ) a2 YKJD:1 3 YKJD:1 3 YKJD13a1 220V 2 3 4 - - - C C C AT AD Red 2 Red 2 Red 2 Red 2 1 White 1 White 1 White1 White 3 Blue 3 Blue 3 Blue 3 Blue YKJD YKJD YKJD YKJD(II) YKJD LEVEL SWITCH SERIES APPLICATION EXAMPLES:1. The figure 2 shows
2、the application on oil tank. When the liquid level is lower than the p-osition required, the liquid level control relay YKJD acts; 1and 2are cut off, C coil of theinter mediate relays power supply is cut off, then the motor of oil pump stops working. 2. The figure 3 is used as liquid level control a
3、larm device on the oil tank for hydraulic sta-tion. When the liquid level is lower than the position required, the liquid level control r-elay acts; 1and3 are put through, then the alarm works. 3. The figure 4 is applied on water accumulator or some auto. control oil tanks to realize a-uto. Water or
4、 oil supplies. The figure 5 and 6 are installation diagrams with the followi-ng principle: When the liquid level is lower than a1, the liquid level control relayYKJD(I)acts(at this time, YKJD(II) is under work condition, that means 1 and 3 are put through), 1 and 3 are put through, the current passe
5、s the C coil of intermediate relay (normally o-pen contact of C is closed) to make water or oil supply motor work; When the liquid lev-el exceeds a1, the relay YKJD(I) acts; 1 and 3 are cut off, the current passes though thenormally open contact C (at this time, it is still under closed state) to ma
6、ke water or oil supply motor continuously work; When the liquid level exceeds a2, the relay YKJD(II)a-cts; 1 and 3 are cut off, water or oil supply motor stops working, then it descends with the liquid level, YKJD(II) acts; 1 and 3are put through, but 1 and 3 of YKJD (I)are still u-nder the cut-off
7、state, so liquid supply motor does not work yet, the liquid supply motor restarts until the liquid level descends belowa1. YKJD1 4-M4 () L 70 45 1 L 35 II 35 4-M8X40 60 75 30 90 I 50 () II I 54 INTRODUCTION AND WORK PRINCIPLEThis level switch is a new type fluid level indicator. It can be used for a
8、uto controlling or alarming of fluid level in a tank or electric motor.During operation, the float will rise or f- all down with to the level of fluid in a tank. As the float rises or falls down to the level point preset for alarming or stopping the motor, the level switch will act, the normally ope
9、n close. 36(M36 2) 55 42 YKJD-*-*-*-*-Z14 Z14 ( 1 ) YKJDQ-*-*-*-*-Z14 Z14 ( 1 ) 45 60 75 90 YKJD () YKJDQ () 36(M362) 55 42 427b a 1a2a3 ba1a2a3b a 800mm YKJD24-800b 1 a 1000mm 2 a 500mm 3 a 350mm YKJD24-1000- 500-350TECHNCAL DATA1 Temperature range( ): -20 +1002 Time of motion(ms): 1.73 Contact res
10、istance( ): 0.14 Contact capacity:DC24(V) 0.2(A)AC220(V) 0.02(A) 75 Life: ( )10MODEL CODE YKJD 24 * 3 Third level L3(mm) 2 Second level L2(mm) 1 First level L1(mm)Voltage:24=DC:24V220=AC:220V YKJDLevel switch BH water-glycolOmit if use hydraulic oil Q: Light SeriesOmit if standard series 90mm 7 5 6
11、YKJD(II) YKJD(II) YKJD(I) YKJD(I) a2 a1 a1 a21 3 1 2 4 3 7 2 5 1 4 7 6 5 6 1 YKJDQ24- * * -* - Note: The length desired refers to the figure 7,B is the cover plate top of oil tank, a1, a2, a3 are liquid level sign- altrans-mitting positions, the user can select the length from b to a1, a2, a3 accord
12、ing to the use condition. Example: (1)use one-point liquid level control relay to control the liquid level: When the distance from the cover plate b of oil tank to the liquid level signal-transmitting desired position is 800mm, the order model is YKJD24-800.(2)use multi-point liquid level control re
13、lay to control the liquid level: When the distance from the cover pla- te b of oil tank to the first point a of desired liquid level is 1000mm, to the second point a is 500mm and to the third point a is 350mm, the order model is YKJK24-1000-500-350. If more control points are necessary, the model can be on the analogy of this. ( ) ( YKJD ) 7 L3 L2 ( 90mm) (1) (2) YKJD a3 a2 a1 L3 L2 L1 Z14 Z14 ( 1 )
