ENTEK E2109/30/05/1/10
过流保护都是可以自***的，也就是说，当过流现象消失后，也就不再保护。
在实际电路中，过流一般都是不正常现象，或者说是故障。所以，过流保护应该是不可以自***的，需要停电排除故障后人工***逆变电路的工作。这种不可以自***的电路可以用反馈自锁或者用可控硅电路实现;开关管的导通压降是和导通电流有关的，当开关管过流时，其导通压降会明显上升.通过检测开关管的导通压降，与正常值比较，并与截止状态相区别，从而识别出开关管的过流状态;电流检测信号来自逆变器U、V两相输出端的霍尔电流传感器，霍尔元件通过插座CN2获得15v电源。U、V两相电流检测信号经首级运放A6和A5放大20倍后送入二级运放A8和A7。调整二级运放的放大倍数即可整定过流保护动作值。U、U两相电流通过反相加法器A9叠加获得W相电流信号。U、V、W各相电流分别同时送入两个比较器的正、反相输入端。比较器正、反相输入端的参考电压分别为+10v和-10v。当三相电流正常时其对应的电压在&plu***n;10v之间，六个比较器相与后输出为1，此信号经三极管反相后送入由多谐振荡器D4528组成的单稳态触发器，-Q输出为0，比较器A17、A18输出信号也应为0，保护电路不动作。
一旦过流，比较器相与后输出信号为0，D4528的输入信号(5脚)为1，其输出经单稳***后才变为1，通过三极管VT2放大后去关闭IGBT的驱动信号并通知CPU发出过电流报警信号。单稳态触发器的作用是这样的:在***期间若电流***正常，则D4528的输出信号不改变，这就避免了一些干扰信号或瞬间尖峰电流造成的保护电路误动作，保证了变频器正常工作。
LOT OF 2 MICRO SWITCH BZ-2RQ785 *USED*
MICRO SWITCH BZV6-2RN2 *USED*
TELEMECANIQUE LP1-D25-10 24V *USED*
EFECTOR 8036AC15NL2AAXX *USED*
MICRO SWITCH PREWIRED ENCLOSED SWITCH BZLN-2-LH *AS IS*
BANNER S18AW3D *USED*
MICRO SWITCH 8LS1 *USED*
ALLEN BRADLEY 800H-2HZ4R *USED*
OMRON WLCA2 *USED*
NUMATICS 228-703B *USED*
PORTTER & BRUMFIELD KRP11DG *USED*
GE 15D2G2 115V *USED*
TYCO 600 731/741 UNI BODY PISTON TRAP 600PSI *USED*
IFM INDUCTIVE PROXIMITY SWITCH 8015AL10FL2CPXX *USED*
ANALOG J BOX 13640300A TERMINAL JUNCTION PC BOARD *USED...
LOT OF 3 HUMPHREY 5-S-1 AIR CYLINDER *USED*
BENTLY NEVADA 3300/16-02-01-0?0-01-02 DUAL VIBRATION MON...
PBM SIH-37-TT3/F0 BALL VALVE *USED*
AIOI SYSTEMS CO. TW2171 ETHERNET ***ALL CONTROLLER *AS I...
FANUC TRANSIT UNIT A05B-2308-C030 *USED*
FESTO MVH-5-1/4B PNEUMATIC SOLENOID VALVE *USED*
LINCOLN ELECTRIC NA-5 VOLTAGE BOARD G1556-5 CIRCUIT BOA...
MAC VALVE INC. 35A-AAA-DDAA-1C?A SOLENOID VALVE *USED*
PARKER 524011115B 3-WAY 2-POS SOL/SPR RET VALVE *USED*
CUTLER-HAMMER AN16AN0 W/ C306DN3 SERIES B *USED*
BROOKS 3602-08A2A1A *NICE*
BOBST 704-1337-01 PC BOARD *USED*
MOORE INDUSTRIES RESISTANCE BULB TRAN***ITTER 200-236-20...
ALLEN BRADLEY 700-N400A1 SER.C *USED*
ACOPIAN VTD15-40 OP- AMP DUAL POWER SUPPLY 400MA 15V *U...
WESTLOCK CONTROLS CORP. 2007N VALVE POSITION MONITOR *U...
PARKER 851006 SOLENOID COIL 120VAC *USED*
1538A88H12 9617 *USED*
SPRAUGE B-39 R *USED*
TOSHIBA 30787 *USED*
SIEMENS 3TB4017-0B 24V *USED*
ARROW PT-100-N-HA-S GAUGE *USED*
PORELON 1045012 *USED*
DYNAMATIC 15-169-6 *USED*
HOLLAND R24-PSD-1010-S6?-35.75" *USED*
MOORE PRODUCTS 40-15 *USED*
DONGAN 50-0500-053 *USED*
PILZ PNOZX2.124VAC/D?C2N/0 *USED*
CARLO G***AZZI EL124TBCSL *USED*
INDRAMAT D***02.1-FW *USED*
GOULD AS-884A-201 *USED*
UL 3PH REACTOR 3PR-0008C3H *USED*
COMPUTER PRODUCTS POWER SUPPLY PGR 114C *NICE*
MDI 335NO-120A *USED*
PANALARM SC100-120A *USED*
RED DOT RS32 *USED*
FOODLINE PIPPING PRODUCTS 59GEN-3-E-1 *USED*
USON 451 *USED*
GE 6VFWC15JR *USED*
CONTROL ENGINEERING DLR115A2A5M *USED*
GOULD A6KA *USED*
SQUARE D 8536-SB0 2 *USED*
REXROTH 5726079870 *USED*
TDK FAW15-6.6K *USED*
HOLJERON CST-900300 SDS INTERFACE PNEUMATIC MANIFOLD *U...
PARKER CSP101P-6P *USED*
DART CONTROLS LT-30 *USED*
TREGASKISS TG-103-05-2 *USED*
BURLING H-1S TEMPERATURE CONTROL *USED*
MODION 140 CFG 016 00 *USED*
LOT OF 9 SHOP-VAC 90671 *NEW IN A BOX*
OPTO 22 SNAP-AIMV-4 *NEW OUT OF A BOX*
MONITOR 1-8381-1 MODEL KA *USED*
SALCO A105 STAPLER *USED*
LOT OF 3 GENERAL ELECTRIC COIL 15D4G4 460V *USED*
SPRECHER + SCHUH CA7-16-10 *USED*
SQUARE D 8501-L0-40 CONTROL RELAY *USED*
MOELLER NZM6B-63/ZM6-40?-CNA CIRCUIT BREAKER *NEW IN A B...
LINE MATERIAL INDUSTRIES WHD-S1F1 *USED*
LOT OF 4 WR 905-19 FLAME DETECTOR *USED*
UNDERWRITERS LABORATORIES HLA3250T *USED*
UNDERWRITERS LABORATORIES F-1753 *USED*
KEYENCE KV-300 CPU *NICE*
ADVANCE 79W4330-001-N LAMP BALLAST *USED*
DELTA CONTROLS CORP 328-4X-AA *USED*
SIEBE HC-201 *USED*
CAPTOR JK-BGA-M5VAC MITTE/CENTER *USED*