Quality MCCB 1000V Fixed Type Moulded Case Circuit Breaker OEM Approved

• 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 (MCCB) is engineered to handle rated currents up to 250A, making it ideal for robust power distribution circuits operating at 50-60Hz and with a rated operating current up to 1000A. This versatile device is not only perfect for power distribution but also excels in electric motor applications, providing reliable infrequent starting, comprehensive overload protection, and safeguards against short circuits and undervoltage conditions.

The DAM3 series from Shanghai DaDa Electric Co., Ltd. sets a new standard with its compact design, enhanced breaking capacity, and superior energy efficiency, distinguishing it from the previous DAM1 series.

Electrical parameters of the 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 of the 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 MCCB is a state-of-the-art device that automatically disconnects the current when it exceeds the pre-set release threshold. The term 'molded case' highlights the durable plastic insulator that forms the frame, ensuring thorough insulation of the conductor and metal grounding components.

Working principle
The operation of the DAM3-250 MCCB begins with either manual manipulation or electric closing of the main contact. Once closed, the free release mechanism secures the main contact in place. Integrated into the main circuit, the overcurrent trip coil and thermal trip element work in series, while the undervoltage trip coil is connected in parallel with the power supply, ensuring optimal performance and safety.