| Customization: | Available |
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| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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At the heart of power management, the DAM2 (CM1) series circuit breaker is engineered with a rated insulation voltage of 800V. Ideally crafted for AC distribution networks operating at 50Hz/60Hz, it manages a rated working voltage up to 690V and a current capability reaching 1250A. This series excels in distributing power efficiently while safeguarding circuits and equipment from potential overloads, short-circuits, under-voltage, and other electrical anomalies. Additionally, it facilitates occasional circuit transitions and motor initiations, offering exceptional flexibility with options for both vertical and horizontal installations. Designed for isolation, as indicated by the symbol ' ', the DAM2 MCCB adheres to the stringent IEC60947-2 standards for low-voltage switchgear and control apparatus, specifically concerning circuit breakers.
1. Ambient air temperature: Keep between -5ºC to +40ºC, with an average daily temperature not exceeding +35ºC to ensure optimal performance.
2. Altitude: Ensure that the installation site remains below an altitude of 2000 meters to maintain operational integrity.
3. Atmospheric conditions: At a maximum temperature of +40ºC, the relative humidity should not surpass 50%. Elevated humidity levels are permissible at cooler temperatures, with a peak average relative humidity of 90% and a minimum average monthly temperature of +25ºC, taking into account condensation effects on the product's surface.
4. Pollution Degree: Categorized under Level 3.
Selection of instructions
Classified by pole types:
Type A: N-pole lacking over-current release components, maintains a continuous connection, and operates independently from the other three poles.
Type B: N-pole without over-current release components, operates in synchronization with the other three poles, activating prior to deactivation.
Type C: Featuring N-pole with over-current release components, it operates in unison with the other three poles, activating before deactivation.
Classified by rated current of over-current release:
DAM2-63 MCCB Available in a spectrum of nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, 63 A, tailored to meet diverse demands.
DAM2-100 MCCB Offering nine distinct ratings: 16, 20, 25, 32, 40, 50, 63, 80, 100 A, these products cater to a wide range of applications.
DAM2-250 MCCB Available in seven specified ratings: 100, 125, 140, 160, 180, 200, 225, 250 A, ensuring adaptability for varied needs.
DAM2-400 MCCB Available in five robust ratings: 225, 250, 315, 350, 400 A, crafted for superior performance standards.
DAM2-630 MCCB Available in three potent ratings: 400, 500, 630 A, catering to the most powerful and demanding applications.
DAM2-800 MCCB Discover our Circuit Breaker series available in three distinct ratings: 630, 700, and 800 A, meticulously engineered to meet higher capacity requirements. Ideal for those with demanding energy needs, these options provide robust solutions tailored for increased performance.
Introducing the DAM2-1250 MCCB, a powerhouse in circuit protection, available in three ratings: 800, 1000, and 1250 A. Experience the epitome of power and security, engineered to deliver unparalleled safeguarding for your electrical systems.
Remark: Please be aware that the 6A version is exclusively limited to electromagnetic (instantaneous) operations and is not advisable due to specification limitations. Carefully select for superior performance and reliability.
Wiring Options: Customize your setup with our diverse wiring selections-front-of-board, back-of-board, or insertion type. These adaptable options ensure your installation seamlessly fits into a variety of configurations, achieving perfect integration.
Over-Current Release Patterns: Our circuit breakers are offered in both thermodynamic-electromagnetic (dual) type and electromagnetic (instantaneous) type. Designed for precision and dependability, these options cater to a multitude of application needs with exactness.
Outfit Options: Personalize your circuit breaker to meet your precise needs by choosing either with or without outfit options, ensuring optimal alignment with your electrical infrastructure.
Outfit Details: Enhance your circuit breaker's utility with our range of inner accessories, including the shunt release, under-voltage release, auxiliary contact, and alarm contact. For external accessories, opt for turning handle operation mechanisms or power-driven operation mechanisms, delivering comprehensive control solutions.
Breaking Capacity: Choose from our varied capacity options-L-standard breaking, M-second high breaking, and H-high breaking types-to perfectly accommodate the diverse demands of your applications, ensuring superior circuit protection.
1. Instantaneous Action Characteristics: Our distribution circuit breakers feature a setting value of 10In±20%, with the DAM2-1250 model finely tuned at 7In±20%. Motor protection circuit breakers are diligently set to 12In±20%, guaranteeing unmatched performance and safety.
2. Rated Values: For a detailed insight into the rated values, Table 2 provides comprehensive specifications for our circuit breakers, ensuring you are equipped with all the necessary information for informed decision-making.
3. Ambient Temperature: At an ambient temperature of +40ºC, explore the detailed over-current release action characteristics in Table 3 for distribution circuit breakers and Table 4 for motor protection circuit breakers, ensuring robust and reliable performance across varying conditions.
Rated Value: Immerse yourself in the detailed specifications of our circuit breaker's rated value, offering a clear insight into its capabilities to ensure it meets your application requirements seamlessly.
| Model | Pole | Rated current (A) | Rated operating voltage (V) |
Rated insulation voltage (V) |
Rated ultimate short - circuit breaking capacity (Icu) | Flashover distance(mm) |
||
| Test voltage (V) | Icu (kA) | Ics (kA) | ||||||
| DAM2L-63 | 3 | 10,16,20,25, 32,40,50,63 |
400 | 500 | 400×1.10 | 25 | 18 | 0 |
| DAM2M-63 | 3,4 | 50 | 35 | |||||
| DAM2L-100 | 3,4 | 16,20,25,32,40, 50,63,80,100 |
400 | 800 | 30 | 22 | ≤50 | |
| DAM2M-100 | 2,3,4 | 50 | 35 | |||||
| DAM2H-100 | 3 | 85 | 50 | |||||
| DAM2L-100 | 3,4 | 690 | 10 | 5 | ||||
| DAM2M-100 | 2,3,4 | 20 | 10 | |||||
| DAM2L-225 | 3,4 | 100,125,140, 160,180,200,225 |
400 | 800 | 35 | 25 | ||
| TXCM1-225 | 2,3,4 | 50 | 35 | |||||
| DAM2H-225 | 3 | 85 | 50 | |||||
| DAM2L-225 | 3,4 | 690 | 10 | 5 | ||||
| DAM2M-225 | 2,3,4 | 20 | 10 | |||||
| DAM2L-400 | 3 | 225,250,315, 350,400 |
400 | 800 | 50 | 35 | ≤100 | |
| DAM2M-400 | 3,4 | 65 | 42 | |||||
| DAM2H-400 | 3 | 100 | 65 | |||||
| DAM2L-400 | 3 | 690 | 15 | 8 | ||||
| DAM2M-400 | 3,4 | 20 | 10 | |||||
| DAM2L-630 | 3 | 400,500,630 | 400 | 800 | 50 | 35 | ||
| DAM2M-630 | 3,4 | 65 | 42 | |||||
| DAM2H-630 | 3 | 100 | 65 | |||||
| DAM2L-630 | 3 | 6910 | 15 | 8 | ||||
| DAM2M-630 | 3,4 | 20 | 10 | |||||
| DAM2M-800 | 3 | 630,700,800 | 400 | 800 | 75 | 50 | ||
| DAM2H-800 | 3 | 100 | 65 | |||||
| DAM2M-800 | 3 | 4690 | 30 | 15 | ||||
| DAM2-1250 | 3 | 800,1000,1250 | 400 | 800 | 85 | 42 | ||
| DAM2-1250 | 3 | 690 | 25 | 12.5 | ||||
Note: Our 2-pole and 4-pole circuit breakers, categorized into L, M, and H types, maintain consistency with the M-type breaking index, assuring uniformity and dependability across all models.
Inverse Time Breaking Action: Gain insight into the sophisticated characteristics of over-current release for power distribution, particularly when all poles are energized simultaneously, ensuring comprehensive and robust protection.
| No. | Test current | I/In | Set time | Initial state |
| 1 | Conventional non-tripping current | 1.05 | 2h(In>63A),1h(In≤63A) | Cold |
| 2 | Conventional non-tripping current | 1.30 | 2h(In>63A),1h(In≤63A) | Immediately after Test 1 |
Instantaneous Action Characteristics: Our distribution circuit breakers are meticulously crafted with a setting value of 10In±20%, while motor protection circuit breakers are rigorously set at 12In±20%, ensuring effective and secure operation.
Inverse Time Breaking Action: Explore the detailed characteristics of over-current release for motor protection when all poles are equally energized, providing tailored protection for your systems.
| No. | I/In | Set time | Initial state | Remark |
| 1 | 1.0 | >2h | Cold | |
| 2 | 1.2 | ≤2h | Immediately after Test 1 | |
| 3 | 1.5 | ≤4min | Cold | 10≤n≤225 |
| ≤8min | 225 < in ≤ 630 | |||
| 4 | 7.2 | 4s≤T≤10s | Cold | 10≤In≤225 |
| 6s≤T≤20s | 225 < in ≤ 630 |
Accessories
1. Internal Accessories of Circuit Breakers
1.1 Shunt Release
Shunt Release Voltage: Crafted for reliability, our shunt release operates under rated control supply voltages of AC50Hz, 230V, 400V, and DC110V, 220V, 24V. It ensures dependable performance within a 70%~110% voltage range, guaranteeing flawless functionality of your circuit breaker.
DC24V Shunt Release: To ensure operational reliability, adhere to specified standards for maximum copper wire length, ensuring your circuit breaker remains secure and functional at all times.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: In instances where specific table requirements are unmet, it is paramount to design your shunt release control circuit in accordance with the provided schematic. This approach will ensure optimal functionality, maximum safety, and the continued excellence of your equipment's performance.
1.2 Under-Voltage Release
Under-Voltage Operation: Our advanced under-voltage release system ensures the circuit breaker maintains reliable operation, even when the supply voltage decreases to between 70% and 35% of the rated voltage. This feature is key in safeguarding both your equipment and overall functionality.
Under-Voltage Protection: Should the voltage drop below 35% of the rated threshold, the under-voltage release mechanism prevents the circuit breaker from closing. Conversely, when voltage exceeds 85%, it facilitates closure. This dual function provides robust safety and operational dependability.
Closing Mechanism: To maintain secure and efficient circuit breaker operation, the under-voltage release ensures closure at supply voltages above 85% of the rated value. This optimizes both the safety and reliability of your system.
Under-Voltage Ratings: Our devices are meticulously rated at AC50Hz, 230V, 400V, guaranteeing consistent performance that meets the highest benchmarks of reliability and safety.
400V.
Special Note: Circuit breakers with under-voltage releases are expertly crafted to operate optimally at the rated voltage. This design secures safe opening and closing cycles, reinforcing system safety and operational excellence.
normally.
1.3 Pre-Paid Meter Dedicated Release
Our cutting-edge pre-paid meter dedicated release is engineered with a rated operating voltage Ue of AC230/50Hz. It delivers standout performance across a dynamic range of 65% to 110% of Ue. Ingeniously, when disengaged from control (Ctrl), the circuit breaker initiates a calculated delayed opening ranging from 0.5 to 2 seconds. This design ensures unparalleled safety and reliability, providing assurance and peace of mind.
Wiring Diagram for Pre-Paid Meter Dedicated Release: Your quintessential guide to achieving flawless connectivity and integration.
1.4 Rated Values of Auxiliary Contacts and Alarm Contacts (Refer to Table 5 for comprehensive details)
| Classification | Conventional thermal current (Ith) | Rated current when
AC 400V Ie(AC-15) |
Rated current when
DC 220V Ie(DC-13) |
| Auxiliary contact | 3 | 0.4 | 0.15 |
| Alarm contact | 3 | 0.3 | 0.15 |
a. Auxiliary Contact: An essential component designed for augmenting operational efficiency.
b. Alarm Contact: Precisely engineered to deliver accurate and reliable alerts.
Our sophisticated alarm contacts are crafted to remain inactive during normal operations. They transition between normally open and closed states solely during free or fault tripping events, ensuring that alerts are triggered only when absolutely necessary.
2. External Accessories for Circuit Breakers: Enhance both functionality and performance with our range of accessories.
2.1 Motor Operating Mechanism: Discover the rated values and their associated codes in Table 6, providing insightful details.
| Category/Model | DAM2-63. 125. 250 | DAM2-400. 630. 800. 1250 |
| Structure type | Electromagnet | Motor |
| AC voltage code | AC50Hz,230V,400 | AC50Hz,230V,400 |
| DC voltage code | DC110V,220V | DC110V,220V |
NOTE: Following the tripping of the circuit breaker with an electric operating mechanism, a reset is required before re-engagement. This ensures readiness for seamless operation.
Principle Diagram for the Opening and Closing of DAM2-63,100,225 Electric Operating Mechanism (AC): A detailed visualization of the process for optimal comprehension and implementation.
Principle Diagram for Opening and Closing of DAM2-400,630,800,1250 Electric Operating Mechanism (AC): A clear depiction of high-capacity operations for enhanced understanding.
2.2 Installation Dimensions for Manual Operating Mechanism: Refer to Table 10 to ensure a precise fit and flawless function.
Diagram of Handle Mounting Hole for DAM2-63~800: A precise guide to achieving accurate installation.
Total Height of Electric/Manual Operating Mechanism of Circuit Breaker (mm) (Refer to Table 12): Ensure seamless integration with your existing systems through our detailed specifications.
| Model | Total height of electric operating mechanism H |
Installation dimensions
of manual operating mechanism H |
| DAM2L-63 | 155 | 49 |
| DAM2M/H-63 | 164 | 49 |
| DAM2L-100 | 152 | 51 |
| DAM2M/H-100 | 170 | 51 |
| DAM2L-225 | 182 | 54 |
| DAM2M/H-225 | 199 | 54 |
| DAM2L/M/H-400 | 255 | 88 |
| DAM2M/H-630 | 262 | 89 |
| DAM2M/H-800 | 261 | 96 |
| DAM2H-1250 | 290 | 103 |
Quick Selection Table for DAM2 Series Molded Case Circuit Breakers: Effortlessly simplify your selection for optimal performance and efficiency.
| Corresponding letters |
Function name | Function corresponding to the model |
| a | Model features | DAM2 Molded Case
Circuit Breaker |
| b | Frame rated current code | 63A,100A,225A,
400A,630A,800A, 1250A |
| c | Breaking capacity characteristic code |
L-standard breaking type;
M-second high breaking type; H-high breaking type |
| d | Operation mode code | No code for handle operation;
P for electric operation; Z for turning handle operation |
| e | Pole | 2-two poles;
3-three poles; 4-four poles |
| f | Release name | 2 Electromagnetic release;
3 Double release |
| g | Accessory | 00 Without accessory 08 Alarm contact 10 Shunt release 20 Auxiliary contact 30 Undervoltage release 40 Shunt release, Auxiliary contact 50 Shunt release, Undervoltage release 60 Two sets of auxiliary contacts 70 Auxiliary contact, Undervoltage release 18 Shunt release, Alarm contact 28 Auxiliary contact, Alarm contact 38 Undervoltage release, Alarm contact 48 Shunt release, Auxiliary contact, Alarm contact 58 Shunt release, Undervoltage release, Alarm contact 68 Two sets of auxiliary contacts, Alarm contact 78 Auxiliary contact, Undervoltage release, Alarm contact 10Y Pre-paid meter dedicated release 40Y Pre-paid meter dedicated release, Auxiliary contact 50Y Pre-paid meter dedicated release, Auxiliary contact, Undervoltage release 18Y Pre-paid meter dedicated release, Alarm contact 48Y Pre-paid meter dedicated release, Auxiliary contact, Alarm contact 58Y Pre-paid meter dedicated release, Undervoltage release, Alarm contact |
| h | Application | No code for distribution;
2 for motor protection |
| i | Conventional products | No code;
T for transparent cover products |
| j | Amperage | 10,16,20,25,32,63,80,100,125,160,180,200 ,225,250,315,350,400,500,630,700,800,1000 ,1250 |
Example: DAM2L-100 / 33102 63A denotes a DAM2-type molded case circuit breaker. It features a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, double release, and shunt release capabilities. Expertly engineered, it is ideal for motor protection with a rated current of 63A.
To achieve peak performance and reliability, it is vital that the selection, installation, and operation of our products strictly comply with the guidelines specified in the product manual or adhere to the relevant national standards. Meticulous attention to these details ensures optimal functionality.
Important Note: When dealing with the N-pole type of a 4P circuit breaker, it is critical to distinguish between the A-type and B-type classifications. In the absence of specific instructions, the B-type is applied as the default option, ensuring a standardized approach.
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