| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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Overview
The Dada DAM3-250 molded case circuit breaker is engineered to deliver exceptional performance, boasting a rated current of up to 250A. These versatile devices are ideal for power distribution circuits within an alternating current range of 50-60Hz, supporting a rated operating current up to a remarkable 1000A. Additionally, they provide robust protection for electric motors, offering infrequent starting capabilities, along with safeguarding against overload, short circuits, and undervoltage conditions.
The DAM3 series circuit breakers are a testament to advanced engineering, showcasing a compact design that surpasses the DAM1 series. With a focus on efficiency, these breakers guarantee higher breaking capacity while contributing to significant energy savings.
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 designed with precision to automatically disengage the current flow whenever it surpasses the pre-set release threshold. The term 'molded case' denotes the robust plastic insulator that forms the framework of the device, providing essential insulation between the conductor and any metal grounding components.
Working principle
The operation of the DAM3-250 molded case circuit breaker is either manually or electrically controlled. Once the main contact is secured, the free release mechanism maintains it in the closed position. This sophisticated system integrates an overcurrent trip coil and a thermal trip element in a series connection with the main circuit. Additionally, the undervoltage trip coil is arranged in parallel with the power supply, ensuring comprehensive protection.
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