Molded Case Circuit Breakers

Overcurrent Trip Devices

1. Thermal Magnetic Type

• Demonstrative Trip
  If overcurrent flows, bi-metal is heated and bent toward arrow so as to activate Trip Cross Bar to be automatically broken.
• Instantaneous Trip
  If a large current flows, Fix Core sucks Armature and activates Tip Bar to be automatically broken.

2. ODP(Oil Dash Pot) Type

• Demonstrative Trip
  If overcurrent flows, Plunger is sucked in Plug and Plug becomes magnetized, sucking Armature to be automatically broken.
• Instantaneous Trip
  If an instant large current flows, Plug becomes magnetized even though Plunger does not move because magnetic flux in magnetic circuit becomes larger, sucking Armature to be automatically broken.
  

Earth Leakage Detection Principles

Earth Leakage Breaker is a current working type breaker that detectsground fault current to break the circuit when ground fault current is generated due to earth leakage from the edge of load, and uses ZCT(Zero Current Transformer) as a detector. Inthe normal state of circuit, load current(IL) passing through ZCT is well balanced and output will not appear at the secondary side of ZCT, as shown in the Fig.(a).
Inthe state of groun fault current generated as shown in the Fig.(b), ground fault current(lg) flows and load current(IL) passing through ZCT becomes imbalanced and this cause induced current(lt), breaking the circuit by filtering Trip Coil.

A List of Types of Molded Case Circuit Breakers(Economic/Standard Series)

Frame Size		100AF
Type		Economic type			Standard type
Type name		TEB-102	TEB-103	TEB-104	TEB-102h	TEB-103h	TEB-104h
External appearance
Rated current(A)		60,75,100			60,75,100
Rated voltage(Ue) AC(V)		460	460	460	460	460	460
Number of poles, Number of elements		2P2E	3P3E	4P3E	2P2E	3P3E	4P3E
Protective function		Overload and short-circuit protection
Rated breaking capacity (kA)	(sym) AC460V	10	10	10	14	14	14
	(sym) AC380V	10	10	10	14	14	14
	AC220V	22	22	22	25	25	25
Dim	a	50	75	100	50	75	100
	b	130	130	130	130	130	130
	c	60	60	60	60	60	60
	d	80	80	80	80	80	80
Product weight(kg)		0.6	0.8	1	0.6	0.8	1
Overcurrent trip type		ODP
Insulating barrier basic (Power side)		O	O	O	O	O	O
Installation method		Screw
Acquired standards	Electrical Appliances Safety Certification	O	O	O	O	O	O
	KSC8321	O	O	O	O	O	O

A List of Types of Molded Case Circuit Breakers(Economic/Standard Series)

Frame Size		225AF
Type		Economic type			Standard type
Type name		TEB-202	TEB-203	TEB-204	TSB-202	TSB-203	TSB-204
External appearance
Rated current(A)		125,150,175,200,225
Rated voltage(Ue) AC(V)		460	460	460	460	460	460
Number of poles, Number of elements		2P2E	3P3E	4P3E	2P2E	3P3E	4P3E
Protective function		Overload and short-circuit protection
Rated breaking capacity (kA)	(sym) AC460V	14	14	14	25	25	25
	(sym) AC380V	14	14	14	25	25	25
	AC220V	25	25	25	50	50	50
Dim	a	105	105	140	105	105	140
	b	165	165	165	165	165	165
	c	60	60	60	60	60	60
	d	84	84	84	84	84	84
Product weight(kg)		1.1	1.3	1.5	1.1	1.3	1.5
Overcurrent trip type		Thermal magnetic type
Insulating barrier basic (Power side)		O	O	O	O	O	O
Installation method		Screw
Acquired standards	Electrical Appliances Safety Certification	O	O	O	O	O	O
	KSC8321	O	O	O	O	O	O

A List of Types of Molded Case Circuit Breakers(Economic Sereis)

Frame Size		400AF		600AF		800AF
Type		Economic type
Type name		TSB-403	TSB-404	TSB-603	TSB-604	TSB-803	TSB-804
External appearance
Rated current(A)		250,300,350,400		500,600		700,800
Rated voltage(Ue) AC(V)	AC(V)	600	600	600	600	600	600
	AC(V)	250	250	250	250	250	250
Number of poles, Number of elements		3P3E	4P3E	3P3E	4P3E	3P3E	4P3E
Rated insulation voltage(Ui)(V)		660		660		660
Rated breaking capacity (kA) KSC8321 IEC60947-1(lcu) ics=0.5lcu	(sym) AC500V	25		45		45
	(sym) AC460V	35		50		50
	(sym) AC415V	35		50		50
	(sym) AC380V	50		50		50
	(sym) AC220V	65		100		100
	(sym) DC250V	20		40		40
	(sym) DC125V	30		50		50
Dim	a	140	186
	b	258	258
	c1	97.5	97.5
	c2	108	108
	d	152	152
	e	90.5	90.5
	f	50.7	50.7
	h	42.5/45.5	42.5/45.5
	j	195	195
	k	45	45
Product weight(kg)		4.8	5.6
Overcurrent trip type		TM	TM
Trip test button		O	O
Connection type(standard)		Surface type
Installation method(standard)		Screw
Acquired standards	Electrical Appliances Safety Certification	O	O
	KSC8321	-	-