Application
KLM3 series moulded case circuit breaker , it’s applicable circuit of AC 50Hz(or 60Hz),rated insulation voltage 690V(AM3-125 500V),rated operating voltage AC 690V or below ,rated operating current 12.5-1600A, for distribute energy of electric and infrequent making and breaking circuit in normal condition. The circuit-breakers are provided with the function of the protection against overload and short circuit and under-voltage. The circuit breakers comply with standard of IEC60947-2. The circuit-breakers are double insulating (Inm=250A or above), the control circuit of the accessories is set apart with the main circuit , and doesn’t need to open the cover of the circuit-breaker when install the accessories.

Specifications(Table 1)

Type	Pole number	Rated insulating voltage (V)	Rated operating voltage (V)	Ultimate short circuit breaking capacity Icu(KA)		Rated shortcircuit serrice breaking capocity Ics(%icu)	Utilization category
				AC380V(400)	AC660V(690)
KLM3-125L	1,2,3,4	500	500	25	-	50%	A
KLM3-160L	3, 4	690	690 and below	35	8	75%
KLM3-160M				50	10	75%
KLM3-250L		800		35	14	100%
KLM3-250M				65	18	75%
KLM3-250H				85	20	75%
KLM3-400L				35	18	100%
KLM3-400M				65	22	100%
KLM3-400H				100	30	75%
KLM3-630L				35	20	100%
KLM3-630M				50	22	100%
KLM3-630H				65	25	100%
KLM3-800L				35	20	100%
KLM3-800M				50	22	100%
KLM3-800H				65	25	100%
KLM3-1250/1600L	3			50	20	100%

Trip units main technical parameter (see table 2)

Table 2

Type	Thermal magnetic release			Electronic release
	Rated current In(A)	Note	Rated current In(A)	Note
KLM3-125	12.5,16,20,25,32,40, 50,63,80,100,125	T fixed M fixed	-
KLM3-160	16,20,25,32,40,50, 63,80,100,125,160	T adjustable (0.7~1In) M fixed	-
KLM3-250	100,125,160,180, 225,250	T adjustable (0.7~1In) M fixed	-
KLM3-400	225,250,315, 350,400	T fixed or adjustable (0.7~1In) M fixed	320,400	I1=0.4…1×In KLM3 PR211(L-LI) I1=0.4…1×In KLM3 PR212(LSI-LSIG) Tripping between 1.05…1.3×I1 (IEC60947-2) I2t=constant (Long-time overload protection) I2=1-2-3-4-6-8-10×In t2=0.05s,0.1s,0.25s,0.5s adjustable (Short-circuit short time delay protection) I3=1.5-2-4-6-8-10-12×In (Instantaneous short-circuit protection) I4=0.2-0.3-0.4-0.6-0.8-0.9-1×In t4=0.1s,0.2s,0.4s,0.8s adjustable (Earth fault protection)
KLM3-630	400,500,630	T fixed M fixed	630
KLM3-800	630,700,800	T fixed M fixed	800
KLM3-1250	-	-	800,1000, 1250
KLM3-1600	-	-	1000, 1250,1600

Note: T-thermal M-magnetic L-long time S-short time relay I-instantaneous G-earth fault KLM3-125/160 In=12.5,16,20,32,40 magnetic protection that is fixed at 500A.

Accessories
1. The external accessories of the breaker
■ Motor-driven operation device
1) Wiring diagram of type CDM electromagnetic operation device(fitting KLM3-125, 160,250) see the following drawing (wiring diagram of the external accessories of the breaker in the dotted frame).

Code description: SB₁、SB₂ stand for push button.(provided by users themselves)
Number “1”、“2”、“3” stand for number of wiring terminals.
Voltage rating: AC50Hz 230V、400V, DC 220V
2) Wiring diagram of type CD motor-driven operation device (fitting KLM3-400、630、800) see belows (wiring diagram of the external accessories of the breaker in the dotted frame)