Compact MCCB Circuit Breaker with Enhanced Terminal Box Design

• 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 a rated current capacity reaching up to 250A. Engineered for power distribution circuits operating at an alternating current of 50-60Hz, this robust device supports a rated operating current of up to 1000A. Ideal for electric motors, it provides reliable protection during infrequent starts, mitigating risks of overloads, short circuits, and undervoltage conditions.

The DAM3 series, compared to the DAM1 series, presents a compact design with enhanced breaking capacity. This innovative series not only occupies less space but also delivers superior energy efficiency, setting a new standard in electrical safety and performance.

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 designed to automatically disconnect the current when it surpasses the preset release setting. The term 'molded case' refers to the use of a plastic insulator that forms the frame of the device, efficiently insulating the conductor and the metal grounding component to ensure optimal safety and performance.

Working principle
The main contact of the DAM3-250 molded case circuit breaker can be closed either manually or electrically. Once the main contact is engaged, the free-release mechanism secures it in the closed position. An overcurrent trip coil and a thermal trip element are connected in series within the main circuit, while an undervoltage trip coil is connected in parallel with the power supply, ensuring comprehensive protection.