| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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Overview
The innovative Dada DAM3-250 molded case circuit breaker is engineered to handle a remarkable rated current of up to 250A. Perfectly adapted for power distribution systems operating at an alternating current frequency of 50-60Hz, this circuit breaker can seamlessly manage a rated operational current reaching 1000A. Not just limited to power distribution, the DAM3-250 is adept at facilitating the infrequent starting of electric motors, offering robust protection against overloads, and safeguarding against short circuiting and undervoltage scenarios.
In comparison to the DAM1 series, the DAM3 series boasts a more compact design, enhanced breaking capacity, and superior energy efficiency, making it an exemplary choice for modern electrical systems.
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 an automatic device that disrupts the power current once it surpasses the preset release threshold. The term 'molded case' is derived from the robust plastic insulator that forms the device's framework, providing essential insulation for conductors and safeguarding metal grounding components.
Working principle
The DAM3-250's primary contact operation is facilitated either manually or through electric actuation. Once the primary contact is closed, the free release mechanism secures it firmly in the closed position. This setup involves an overcurrent trip coil and a thermal trip element integrated in series with the main circuit, while the undervoltage trip coil is strategically connected in parallel with the power supply, ensuring optimized performance.
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