KNW1 Universal Intelligent Air Circuit Breaker

The KNW1 Series Intelligent Universal Circuit Breaker (hereinafter referredto as “the circuit breaker”)is suitable for distributionnetworks with AC50 Hz,rated voltage of 400Vand 690Vand rated current of 630A to 6,300 A,and is used for power dstribution,so as to protect circuits and power equipment from faults such as overlad, undervoltage,shortcircuit, and single-phase grounding.The circuit breaker has the functions of inteligent protection and isolation.It has accurate selective protection,which can improvethe reliablity of power supply and avoid unnecessaryblackout.The circuit breaker is equipped with an open communicatin interfaceto realize telemetering,telesignaling,teleco ntrol and teleregulation,thus meeting the requirements of the centralized control of theautomation system.
The circuit breaker complies with GB 14048.2Low-voltage Switchgear and Controlgear-Low-voltage Circuit Breakers and IEC60947-2 Low-voltage Switchgear and Controlgear—Part 2:Low-voltage Circuit Breakers

Classification

1.According to the installation mode:Fixedtype,drawer type.
2.According to the operation mode:Electrical operation,manual operation (for overhauling and maintenance).3.According to the number of poles:Three-pole,four-pole.
4.According to the release type:Intelligent overcurent controler,undervoltageinstantaneous (or delay)release and shunt release.
5.According to the performance of the inteligent overcurrent controller:Type H(for communication),Type M(general),and Type L(economical)
The functions of the three types of controllers are shown in Table 1.

Table 1
Purpose	Series	Notes	Functions
General industry	H	All digital units Type Ladopts the coding switch and toggle button setting mode. Types M and H adopt the digital display and button setting mode.	Series H
	M		Series M		Communication interface:Provide the standard RS485 interface multi- protocol data transmission function (internal integrated ModBus communication protocol)
	L		Series L	Ammeter Power meter More protection functions, including five optional characteristics Load monitoring Contact wear and mechanical life indication Fault query Programming interface
			RMS value protectionThree- section protection+grounding or leakage protection Load current light column indication Multiple alarm functions Test function Fault memory function Self- diagnosis function MCR making/breaking and off- limit tripping functions

Shell frame level rated current Inm(A)	Rated current In (A)	Rated nsulation voltage Ui(V)	Rated impact withstand voltage Uimp (kV)	Rated voltage Ue(V)	Rated ultimate short-circuit breaking capacity Icu (kA)o-C0		Rated operating short- circuit breaking capaaty lcs(kA) 0-CO-00		Rated short-time withstand curent Icw kA(1s) 0.4so-co delay		Power consumption (In) W
					400V	690V	400V	690V	400V	690V	Fixed	Drawer
2000	630,800 1000,1250 1600,2000	1000	12	AC50Hz 400 690	80	50	65	50	65/50		90	205
											150	310
											170	310
3200	2000 2500 2900 3200				100	65	65	50	65		170	400
											260	510
											320	650
											420	760
4000	2500 2900 3200 4000				100	70	100	70	100/70		430	780
											440	790
											450	800
6300	4000 5000 6300				120	85	100	75	100/85		1225
											1250
											1625

Operating ambient temperature		+40°℃	+45°℃	+50°℃	+55°℃	+60°℃
Continuous current carrying capability	Inm=2000	1 In	0.97 In	0.91 In	0.87 In	0.82 In
	Inm=3200	1 In	0.95 In	0.89 In	0.85 In	0.78 In
	lnm=6300	1 In	0.93 In	0.87 In	0.82 In	0.75 In