Compact Size Moulded Case Circuit Breaker with Terminal Box Cdada

• Customization: Available
• Breaking Capacity: Low Voltage Circuit Breakers
• Operation: Manual Type
• Model NO.: DAM3-250
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Arc Chamber
• Installation: Fixed
• Structure: MCCB
• Poles Number: 3
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection
• Certification: ISO9001-2000, CE, CB, CCC, RoHS
• Base: BMC Unflaming Material
• Terminal: with Terminal Box
• Transport Package: Carton
• Specification: 63, 80, 100, 125, 160, 200, 250A
• Trademark: CDADA, OEM, ODM
• Origin: Shanghai, China
• HS Code: 8536200000
• Production Capacity: 40000PCS/Month

Product Description

Overview


The Dada DAM3-250 molded case circuit breaker boasts an impressive rated current capacity of up to 250A. These robust electrical instruments are engineered for excellence, providing seamless functionality in power distribution circuits with alternating currents of 50-60Hz. They are adeptly crafted to accommodate rated operating currents up to 1000A. Furthermore, these versatile devices excel in electric motor applications, expertly handling infrequent starts, ensuring unparalleled protection against overloads, and safeguarding against short circuits and undervoltage scenarios.

The DAM3 series stands out distinctly from the DAM1 series, with its meticulously engineered design focusing on a more compact form factor, significantly higher breaking capacity, and delivering exceptional energy efficiency.

Electrical parameters of DAM3-250 molded case circuit breaker

Rated current of frame size Inm [A]		250
Rated current [A]		100-250			100-225
Number of poles		2 / 3 / 4
Rated operating voltage	(AC)50-60HZ [V]	400/690
	DC [V]	250/1000
Rated impulse withstand voltage Uimp [KV]		8
Rated insulation voltage Ui [V]		750
Test voltage at industrial frequency for 1 min [V]		3000
Rated ultimate short-circuit breaking capacity Icu [KA]		B	C	N	S
(AC)50-60HZ 220/230V [KA]		30	36	50	75
(AC)50-60HZ 400/415V [KA]		18	25	36	50
(AC)50-60HZ 690V [KA]		6	8	12	15
(DC)250V-2 Poles in series		18	22	30	40
(DC)500V-2 Poles in series		9	12	15	20
(DC)750V-4 Poles in series		16	18	22	30
(DC)1000V-4 Poles in series		13	15	18	25
Rated service short-circuit breaking capacity, Ics [KA]
(AC)50-60HZ 220/230V [%Icu]		60%	60%	60%	50%
(AC)50-60HZ 400/415V [%Icu]		60%	60%	60%	50%
(AC)50-60HZ 690V [%Icu]		60%	60%	60%	50%
category of utilization (EN 60947-2)		A
Isolation condition		Bitmap
Reference standard		IEC/EN 60947-2/GB 14048.2
Interchangeability		Bitmap
Versions	Fixed	Bitmap
	Plug-in	Bitmap
	Draw-out	-

Physical parameters DAM3-250 molded case circuit breaker

Endurance	Total cycles	10000
	Electrical endurance	1500
	Mechanical endurance	8500
Basic dimensions-fixed version	3/4 Poies W[mm]	70(2P) /104 /139
	3/4 Poies H[mm]	59	62.5
	H1[mm]	78.5	82
	3/4 Poies L[mm]	139

Introduction
The DAM3-250 molded case circuit breaker is intelligently designed to automatically interrupt the current flow when it exceeds the predefined release setting. The term 'molded case' refers to the sophisticated use of a plastic insulator as the framework of the device, effectively insulating the conductor from the metal grounding component, ensuring optimal safety and reliability.

Working principle
The operation of the DAM3-250 molded case circuit breaker is an exemplar of sophisticated engineering. The main contact is either manually activated or electrically closed. Once the main contact is secured in the closed position, a highly responsive free release mechanism ensures it remains locked. The overcurrent trip coil and the thermal trip element are ingeniously connected in series with the main circuit, while the undervoltage trip coil is strategically connected in parallel with the power supply, ensuring seamless and reliable operation.