YFW1 Series Air Circuit Breaker

YFW1 series intelligent universal circuit breaker (hereinafter referred to as circuit breaker).suitable for AC 50Hz, rated voltage to AC690V and below, rated current from 200A to 6300Adistribution network, used to distribute power and protect lines and power equipment fromover, under voltage, short circuit, single-phase grounding and other faults. Circuit breaker hasintelligent protection function, select type protection is accurate, can improve the reliability otpower supply, avoid unnecessary power outage. At the same time with open communicationinterface, can be carried out "four remote" to meet the requirements of control center andautomation system. The pulse voltage of the circuit breaker is 8000V when the altitude is2000 meters, (different altitudes are corrected according to the standard, the maximum is notmore than 12000V). The circuit breaker without inteligent controller and sensor can be usedforisolation.

The circuit breaker complies with the standard GB/T14048.2 and lEC60947-2 "Low-voltageswitchgear and control equipment Part 2 Circuit breakers".

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YFW1 Series Air Circuit Breaker

Specification Parameter

1.Rated current of circuit breaker

Frame grade	Rated current In(A)
1600	200,400,630,800,1000,1250,1600
2500	630,800,1000,1250,1600,2000,2500
3200	2000,2500,3200
4000	3200,3600,4000
6300	4000,5000,6300

2.Circuit breaker rated short circuit breaking capacity and short-term tolerance current

Rated current Inm(A)		1600	2500	3200	4000	6300
Rated limit short-circuit breaking capacity Icu(kA)	400V	85	85	100	100	120
	690V	75	75
Rated operating short-circuit breaking capacity Ics(kA)	400V	85	85	80	80	80
	690V	75	75
Rated short-time withstand current Icw(kA/1s)	400V	85	85	80	80	85
	690V	75	75

Note:The breaking capacity in the table is the same as that in the upper and lower lines

3.Changes in the rated continuous current of the circuit breaker at different ambient temperature

Ambient temperature℃

200A

400A

630A

800A

1000A

1250A

1600A

2000A

2500A

3200A

4000A

5000A

6300A

200A

400A

630A

800A

1000A

1250A

1600A

2000A

2500A

3200A

4000A

5000A

6300A

200A

400A

630A

800A

1000A

1250A

1550A

1900A

2400A

3000A

3800A

5000A

6000A

200A

400A

630A

800A

1000A

1250A

1500A

1850A

2300A

3000A

3600A

5000A

5600A

200A

400A

630A

800A

1000A

1200A

1400A

1800A

2200A

2800A

3200A

4800A

5400A

200A

400A

550A

700A

1000A

1150A

1300A

1700A

2000A

2800A

3200A

4800A

5200A

200A

400A

550A

700A

1000A

1150A

1300A

1650A

1850A

2600A

3000A

4600A

5000A

4.Circuit breaker lineup requirements at different altitudes

Altitude(m)	2000	2500	3000	3500	4000	4500	5000
Power frequency withstand voltage(V)	2200	2077	1955	1857	1760	1680	1600
Insulation voltage Ui(V)	1000	900	800	750	700	650	600
Rated operating voltage Ue(V)	690	635	580	540	500	450	400
Rated operating current(le)	le	0.93le	0.88le	0.83le	0.78le	0.73le	Contact the factory

Note:If the ambient temperature is lower than 40°℃,le=In;if the ambient temperature is higher than 40°℃,it must be used

In strict accordance with the requirements of the instruction manual for capacity reduction,at this time le≠ln,le is found

according to the corresponding current and temperature.

5.Intelligent controller protection features and functions

a.Setting value Ir(1/In)and error of the controller

Long delay time	Short time delay		Instantaneous moment		Ground fault
Ir1	Ir2	Error	Ir3	Error	r4	Error
(0.4-1)In	(1.5-15)In	±10%	In-25kA(Inm=1600A) In-50kA(Inm=2500A) In-75kA(Inm=3200A-4000A) n-100kA(Inm=6300A)	±15%	Inm=1600A-6300A (0.2-1)In max:1200A min:160A	±10%

Note:Setting values cannot be crossed when there are three sections of protection at the same time.

b.Long delay protection inverse time characteristic I²TL=(1.5Ir1)²tL,where(1.05-2.0)Ir1 action time,error is±15%.

1.051r1	1.3Ir1	1.5Ir1 Setting time s	15	30	60	120	240	480
>2h No action	<1h action	2.0Ir1 Action time s	8.4	16.9	33.7	67.5	135	480

Note:List the setting time for a long delay of 1.5Ir,and TLis the action time for a long delay.

c.Technical parameters of short-circuit short-delay protection

Reverse time limit and fixed time limit set current values	Isd=IR×...	1.5～15+OFF(Exit position)
	Action characteristic	≤0.91 sd:No action is taken
		>1.1 Isd:Delay action
Fixed time delay setting value	tsd(s)	0.1～1(level difference 0.1)
	Accuracy	±10%
Anti-time limit protection feature		Curves 1 to 5 are both overload long delay,but the curve speed is 10 times faster
		Curve 6 characteristic expression:Tsd=64 tsd/N² That is,Tsd=tsd*(8 IR/I)²
Inverse time thermal memory(15min,power off can be cleared)		Standard+OFF

d.Short circuit instantaneous protection feature

Set the current value	li=	1.01~50kA/75kA/100kA+OFF(exit position)
	Action characteristic	≤0.85li:No action
		>1.15li:Action
Action time		<100ms(including natural breaking time of circuit breaker)

e.Ground fault or residual current protection characteristics

Wrong grounding protection	Set the current value	Ig=In×.	0.2～1+OFF(minimum 100A,OFF indicates exit position)
		Action characteristic	<0.8lg:No action
			≥1.01g:Delay action
	Delay setting value	Fixed time delay tg(s)	0.1～1+OFF(differential of 0.1,OFF alarm not only trip)
		Inverse time coefficient KG	1.5～6+OFF(level difference 0.5,OFF indicates a fixed time limit for grounding)
		Accuracy	±10%

f.Residual current protection characteristics

Residual current protecton	Set the current value	Rated residual current I△n(A)	0.3～30.0+OFF(0.1,OFF indicates exit position)
		Action characteristic	<0.81△n:No action
		Action characteristic	≥1.01△n:Delay action
	Delay setting value	Action delay t△n(s)	ON,0.06,0.08,0.10～0.96,0.98,1.00,OFF (ON indicates instantaneous action,OFF indicates only alarm without tripping,level difference is 0.02s)
		Inverse time coefficient KG	5(below 5I△n is the inverse time limit characteristic, ≥51△n is the fixed time limit)
		Accuracy	±10%(或±40ms)