M909-004

M909-004

M909-004

M909-004

M909-004

要适当地增加机柜的尺寸。因此，要使控制机柜的尺寸尽量减小，就必须要使机柜中产生的热量值尽可能地减少。如果在变频器安装时，把变频器的散热器部分放到控制机柜的外面，将会使变频器有70％的发热量释放到控制机柜的外面。由于大容量变频器有很大的发热量，所以对大容量变频器更加有效。还可以用隔离板把本体和散热器隔开，使散热器的散热不影响到变频器本体。这样效果也很好。变频器散热设计中都是以垂直安装为基础的，横着放散热会变差的！关于冷却风扇一般功率稍微大一点的变频器，都带有冷却风扇。同时，也建议在控制柜上出风口安装冷却风扇。进风口要加滤网以防止灰尘进入控制柜。注意控制柜和变频器上的风扇都是要的，不能谁替代谁。

       另外，变频器散热问题还要注意以下两个问题：

       （1）在海拔高于1000m的地方，因为空气密度降低，因此应加大柜子的冷却风量以改善冷却效果。理论上变频器也应考虑降容，1000m每-5%。但由于实际上因为设计上变频器的负载能力和散热能力一般比实际使用的要大，所以也要看具体应用。比方说在1500m的地方，但是周期性负载，如电梯，就不必要降容。

（2）开关频率：国产变频器的发热主要来自于IGBT，IGBT的发热有集中在开和关的瞬间。因此开关频率高时自然变频器的发热量就变大了。有的厂家宣称降低开关频率可以扩容，就是这个道理。

1270-01745 AMAT SWPRESS SPST 42PSI 9/16-18MVCR 1A 2#20AW

1270-01746 AMAT Switch

1270-01770 AMAT VACUUM SWITCH

1270-01778 AMAT Switch

1270-01790 AMAT BUTTON

1270-01831 AMAT Switch

1270-01837 AMAT SWTHERMO SPST OPEN 125F CL 302F

1270-01841 AMAT SW REED RLY 24VDC 5-40MA 1.2MS 30G W/

1270-01874 AMAT SW THERMO SPST OPEN@300F +/-7F DIFF@3

1270-01923 AMAT VACUUM SWITCH J205V 1/4"VCR

1270-02007 AMAT ISOLATOR 3 POLE 60A

1270-02213 AMAT PRESSURE SWITCH SERIES

1270-02832 AMAT SW KEY DPOT-NO 550AC

1270-02859 AMAT SWITCHPRESSURERTA

1270-02862 AMAT SW THERMO SPST OOR@180C CL@168.9C 120VAC

1270-02895 AMAT FLOW SW .5GPM N/O 24V 1/4QDISC ST

1270-02905 AMAT SW MEGASONIC PRESS SPST NO

1270-02933 AMAT Baratron Pressure Switch





1270-02940 AMAT SWTHERMO SPST OPEN130F CL110F 120V@6A HE

1270-02987 AMAT SW PRESS ABS 25TORR DECR 1/4VCR

1270-03027 AMAT SW REED DPST (SPARE FOR 0190-77171)

1270-03029 AMAT SW MOMENTARY (SPARE FOR 0190-77171)

1270-03052 AMAT FLOAT SWITCH MINI

1270-03052 AMAT SW FLOAT MINI

1270-03067 AMAT SW LEVEL SPST 1/2MNPT POLYPROPYLENE SYST

1270-03079 AMAT SW DR OPERATE SPDT 1

1270-03100 AMAT SW SOLID STATE NPN 10-28VDC 3 WIRE 3M LO

1270-03109 AMAT SW PB MOM FH WHT 25MMDIA ILLUM BLK

1270-03112 AMAT SW LIGHT UNIT LED WHT 24VAC/DC BAY BA

1270-03125 AMAT SW LEVEL FLOAT VER SPDT 120VAC@15VA 3

1270-03127 AMAT SWITCH CONTACTOR 4P

1270-03129 AMAT SW PRESS NPN OUTPUT PNL MTG W/COVER & DI

1270-50133 AMAT SW PB EMO LOCK/TURN RESET RED

1270-51000 AMAT SWITCH PHOTOELECTRIC

1270-51007 AMAT SWITCH

1270-51011 AMAT SWITCH PHOTOELECTRIC

1270-90041 AMAT SWITCH I POLE 30A 250V

1270-90123 AMAT SWITCH ATM TO AM SPE(157-H-Q BAILEY & MACKEY LTD)

1270-90130 AMAT Switch

1270-90131 AMAT *SWITCH LIQUID LEVEL FLOAT

1270-90157 AMAT Flow Switch

1270-90232 AMAT SWITCH 3 POSITION SELECTOR

1270-90303 AMAT SWITCH MICRO SHORT LEV/ROLLER

1270-90347 AMAT SWITCH REED AIR CYL MTG DA-90L

1270-98030 AMAT PNEUMATIC SWITCH

1270-98052 AMAT SWITCH.ULTRA SENSITIVE PRESSURE..018 TO

1270-98058 AMAT SWITCH. PRESSURE. ELECTRIC. 0.5 - 5 SCFH

1270-98060 AMAT SWITCH. VACUUM. PROGRAMABLE PNP. 10 - 3

1270-98071 AMAT SWITCH.FLOAT VERTICAL SCP VJD W/15'.EXT

1290-00073 AMAT TERM BLOCK PWR-DIST 3P 600V 200A 1/4-20

1290-00124 AMAT TERM RING TNG #4-STUD 26-22AWG YEL NYL I

1290-00130 AMAT TERMINATOR RESISTOR W/MALE EUROFAST

1290-00222 AMAT TERM BLK 5P 2ROW 12-4AWG 600V 70A 14/16C

1290-01003 AMAT BAKEOUT LAMP TERMINAL RINGS

1290-01012 AMAT TERMINAL RING TNG #10 12-10 AW

1290-01017 AMAT CONNECTOR (PACK OF 8)

1290-01034 AMAT TREM BLK 2P 2ROW 16

1290-01049 AMAT TERMINAL RED-INSUL COPPER (PACK OF 10)

1290-01066 AMAT TERM BLK 16-14

1290-01136 AMAT TERM SPADE TNG SHORT #6

1290-01146 AMAT TERMINAL 16-14 AWG VINYL INSU

1290-01154 AMAT TERM BLK 3P 2ROW WW-16AWG 300V 1 3/8CTR #6SCR

1290-01154 AMAT TERM BLK 3P 2ROW WW-16AWG 300V 1 3/8CTR #6SCR

1290-01182 AMAT TERM BLK 2P 2DROW 22-16AWG 300V 1 3/8

1290-01182 AMAT TERM BLK 2P 2DROW 22-16AWG 300V 1 3/8

1290-01182 AMAT

1290-01182 AMAT

1290-01192 AMAT TERMINAL COVER

1290-01199 AMAT TERM RING TNG#8BLU #6AWG INSUL (PACK OF 10)

1290-01203 AMAT TERMINAL RING TNG 5/16 12-10 AWG YER VINYL

1290-01224 AMAT TERM LUG ONE HOLE (PACK OF 8)

1290-01225 AMAT TERM LUG ONE HOLE (PACK OF 12)

1290-01225* AMAT TERM LUG ONE HOLE NARROW TONG 1/4 BOLT 4

1290-01229 AMAT TERMFERRULESHORTGRN

1290-01230 AMAT TERMFERRULESHOHT

1290-01231 AMAT TERMINAL FERRULE INSUL 8AWG (PACK OF 10)

1290-01232 AMAT TERMLUG

1290-01233 AMAT CONNECTOR (PACK OF 10)

1290-01315 AMAT TERM BLK 2P 2ROW 16-14AWG 300V 20A 7/16C

1290-01315 AMAT

1290-01339 AMAT TERM LUG CPSN 4AWG 10 BOLT (PACK OF 8)

1290-01341 AMAT Y)TERM LUG CPSN 3/8AWG3/8BOLT

1290-01342 AMAT TERMINAL LUG CPRSN 2-3AWG 1/4 BOLT

1290-01344 AMAT TERM LUG CPSN4/8AWG 3/8BOLT

1290-01346 AMAT TERMINAL LUG CPSN 24AWG 1/4 BOLT (PACK OF 8)

1290-01348 AMAT TERM LUG CPSN 250MCM1/4BOLT

1290-01382 AMAT TERM BLK 8TERM 14-6AWG 10-32SCR 50A 11/1

1290-01386 AMAT TERM BLK 8P 2ROW 16-14AWG 250V

1290-01501 AMAT TERM BLK 16P 2DROW 12-14AWG 300V 30A 9/

1290-01501 AMAT

1290-01551 AMAT TERMINAL JUMPER

1290-01564 AMAT TERM BLK 10P 2ROW 22-14AWG 150V 20A 3/8

1290-01564 AMAT TERM BLK 10P 2ROW 22-14AWG 150V 20A 3/

1290-01564 AMAT TERM BLK 10P 2ROW 22-14AWG 150V 20A 3/8

1290-01564 AMAT

1290-01564 AMAT 3.12

1290-01564 AMAT 3.12

1290-01569 AMAT TERM RING TNG #6 16-14A

1290-01624 AMAT BLOCK TERMINAL

1290-01628 AMAT CLAMP MTL

1290-01631 AMAT TERM BLK 8P 2ROW 600V 50A 16-6