| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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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 | - | ||||
| 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.
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