| Customization: | Available |
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| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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The DAM2 (CM1) series circuit breaker is masterfully engineered to be a powerful protector, with a rated insulation voltage reaching 800V. Designed for AC distribution networks at 50Hz/60Hz, it handles a rated working voltage up to 690V and a remarkable rated current capacity up to 1250A. Ideal for power distribution and safeguarding circuits, it offers complete protection against overloads, short-circuits, and under-voltage. Its adeptness at facilitating infrequent circuit conversions and motor starts highlights its exceptional versatility. Offering the flexibility of vertical or horizontal installation, it's adaptable to any setup. Endorsed by the isolation symbol " ", the DAM2 MCCB aligns perfectly with IEC60947-2 standards for low-voltage switchgear and control equipment, securing its position as a leading circuit breaker.
1. Ambient air temperature: Maintain a consistent range from -5ºC to +40ºC, ensuring the daily average does not exceed +35ºC for optimal performance.
2. Altitude: Ensure the installation site is at an altitude of 2000 meters or lower to guarantee reliability and optimal functionality.
3. Atmospheric conditions: At +40ºC, the relative humidity should be controlled below 50%. Higher humidity levels are acceptable at lower temperatures, with the maximum average relative humidity capped at 90%, and the minimum average monthly temperature at +25ºC, accounting for possible condensation due to temperature changes.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole types:
Type A: The N-pole does not include over-current release components, maintaining continuous connectivity, and functions autonomously from the other three poles.
Type B: The N-pole lacks over-current release components but operates in tandem with the other three poles, becoming active before they deactivate.
Type C: Complete with over-current release components, the N-pole operates in harmony with the other three poles, activating prior to their deactivation.
Classified by rated current of over-current release:
DAM2-63 MCCB Spanning a comprehensive range of nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, and 63 A, expertly accommodating diverse requirements.
DAM2-100 MCCB Available in nine adaptable ratings: 16, 20, 25, 32, 40, 50, 63, 80, and 100 A, ensuring unmatched performance and customization.
DAM2-250 MCCB Featuring a robust selection of seven ratings: 100, 125, 140, 160, 180, 200, 225, and 250 A, delivering strong performance and reliability.
DAM2-400 MCCB Available in five distinct ratings: 225, 250, 315, 350, and 400 A, providing tailored solutions for diverse applications.
DAM2-630 MCCB Experience unparalleled strength and reliability with our circuit breakers, available in three robust ratings: 400, 500, and 630 A. Each option is meticulously engineered to provide superior performance and durability.
DAM2-800 MCCB Unleash the power of choice with our resilient 250A Fixed Type Circuit Breaker. Available in three commanding ratings of 630, 700, and 800 A, it ensures your systems are bolstered with the utmost reliability and strength you require.
DAM2-1250 MCCB: Discover the pinnacle of adaptability and power with our circuit breakers, offering three formidable ratings of 800, 1000, and 1250 A. Each is crafted with precision to meet your most demanding specifications. Opt for excellence that not only meets but surpasses your standards.
Remark: For specialized applications, our 6A version is crafted exclusively for electromagnetic (instantaneous) use. Its unique features make it unsuitable for general purposes, providing precision for niche requirements.
Wiring Options: Experience unrivaled installation flexibility with our versatile wiring solutions. Whether front-of-board, back-of-board, or insertion type, each option allows you to customize your installation with unparalleled ease and precision.
Over-Current Release Patterns: Discover our elite range of over-current release types, featuring thermodynamic-electromagnetic (dual) and electromagnetic (instantaneous) designs. Each pattern is crafted with meticulous attention to detail, ensuring optimal performance for a variety of operational needs.
Outfit Options: Perfect your circuit breaker solution with customizable outfit choices. Whether opting for with or without an outfit, this feature allows seamless adaptation to the specific demands of your application.
Outfit Details: Elevate your circuit breaker system with a comprehensive array of accessories. Inner enhancements include shunt release, under-voltage release, auxiliary contact, and alarm contact. Our external features boast advanced turning handles and power-driven mechanisms, ensuring seamless integration and flawless operation.
Breaking Capacity: Uncover the full range of breaking capacities with our expertly crafted options: L-standard, M-second high, and H-high breaking types. Each is meticulously designed to accommodate various applications, guaranteeing precision, accuracy, and unmatched reliability.
1. Instantaneous Action Characteristics: Experience exceptional precision with distribution circuit breakers, featuring a setting value of 10In±20%, and the DAM2-1250 model set at 7In±20%. Motor protection circuit breakers provide steadfast protection with a setting value of 12In±20%.
2. Rated Values: For a thorough understanding of our circuit breakers' capabilities, refer to Table 2 for a detailed overview of rated values, ensuring you have all the crucial specifications readily available.
3. Ambient Temperature: At a +40ºC temperature, the over-current release action characteristics for distribution circuit breakers are meticulously documented in Table 3. For motor protection circuit breakers, see Table 4, ensuring optimal performance across diverse conditions.
Rated Value: Explore the intricate specifications of the circuit breaker's rated value. Each element is engineered to ensure reliable and efficient performance across a wide range of scenarios, guaranteeing consistent dependability.
| 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: For 2-pole and 4-pole circuit breakers classified into L, M, and H types, each type's breaking index is equivalent to the M-type, ensuring consistent and uniform performance across the board.
Inverse Time Breaking Action: Investigate the over-current release characteristics for power distribution, ensuring consistent protection when all poles are powered concurrently. Rely on steadfast safeguarding throughout all operations.
| 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: Distribution circuit breakers are engineered with a precise setting value of 10In±20%, while motor protection circuit breakers feature a robust 12In±20%, ensuring unfaltering and reliable protection in every scenario.
Inverse Time Breaking Action: Explore the cutting-edge over-current release characteristics that provide exceptional motor protection, ensuring comprehensive power support across all poles with unwavering reliability. Experience the dependable safeguarding your systems deserve.
| 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: Immerse yourself in our inclusive selection of accessories meticulously crafted to elevate the functionality and personalization of our circuit breakers. Each accessory is designed to enhance performance and adaptability, meeting your every need.
1. Internal Accessories of Circuit Breakers: Discover our sophisticated collection of internal enhancements for circuit breakers, engineered to boost operational excellence and customization, tailored to meet the highest standards of performance.
1.1 Shunt Release: Our innovative design merges with precision in the shunt release, ensuring optimal circuit breaker functionality with exceptional efficiency and unmatched reliability.
Shunt Release Voltage: Experience remarkable efficiency with our shunt release, featuring a rated control supply voltage flexibility of AC50Hz, 230V, 400V, or DC110V, 220V, 24V. It guarantees steadfast functionality within a 70%~110% voltage range for seamless operation.
DC24V Shunt Release: Ensure impeccable reliability by adhering to the specified maximum copper wire length, a crucial factor for the optimal operation of the shunt release.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: If table specifications are unmet, we advise designing the shunt release control circuit as outlined to ensure maximum effectiveness and operational assurance.
1.2 Under-Voltage Release: Embrace unrivaled reliability with our under-voltage release, meticulously engineered to deliver consistent, precise performance, thereby enhancing operational safety and efficiency.
Under-Voltage Operation: Enter the domain of unrivaled dependability with our expertly crafted under-voltage release. It maintains impeccable breaker performance during supply voltage fluctuations between 70% and 35% of the rated voltage, assuring steadfast protection.
Under-Voltage Protection: Shield your operations with our advanced feature that prevents risky circuit breaker closures when voltage dips below 35% of the rated threshold. This robust protection ensures secure closure above 85%, maintaining unwavering performance.
Closing Mechanism: Our superior under-voltage release mechanism guarantees reliable circuit breaker closure at supply voltages over 85% of the rated value, acting as a formidable shield for seamless operations and unmatched safety.
Under-Voltage Ratings: With ratings at AC50Hz for both 230V and 400V, our circuit breakers promise consistent performance across various applications, providing peace of mind with every use.
400V.
Special Note: Our meticulously engineered circuit breakers with under-voltage release operate flawlessly at the rated voltage, ensuring secure and reliable opening and closing functions that reinforce safety in every operation.
normally.
1.3 Pre-Paid Meter Dedicated Release
Pre-Paid Meter Dedicated Release: Rated at AC230/50Hz, this release excels over an impressive range of 65% to 110% of Ue. The circuit breaker initiates a precisely timed opening between 0.5 and 2 seconds upon control disengagement, guaranteeing unmatched safety and reliability.
Wiring Diagram for Pre-Paid Meter Dedicated Release
1.4 Rated Values of Auxiliary Contacts and Alarm Contacts (Refer to Table 5)
| 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
b. Alarm Contact
Our alarm contacts are ingeniously engineered to remain inactive during standard operations. They toggle precisely between open and closed states during fault or tripping events, ensuring accurate alerts only when necessary.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Delve into the comprehensive specifications, including precise rated values and specific codes, thoroughly detailed in Table 6.
| 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: After the circuit breaker trips via its electric operating mechanism, it is imperative to reset the breaker before attempting to reclose it. This step is essential to ensure continuous, safe, and reliable operations, maintaining the integrity of your electrical system.
Principle Diagram for Opening and Closing of DAM2-63,100,225 Electric Operating Mechanism (AC)
Principle Diagram for Opening and Closing of DAM2-400,630,800,1250 Electric Operating Mechanism (AC)
2.2 Installation Dimensions for Manual Operating Mechanism (Refer to Table 10)
Diagram of Handle Mounting Hole for DAM2-63~800
Total Height of Electric/Manual Operating Mechanism of Circuit Breaker (mm) (Refer to Table 12)
| 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
| 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: The DAM2L-100 / 33102 63A model is a DAM2-type molded case circuit breaker. It features a frame rated current of 100A and a standard breaking capacity. With handle operation, it has 3 poles, dual release, and shunt release, specifically designed for motor protection. It operates at a rated current of 63A, ensuring robust and reliable performance.
To ensure exceptional performance, it is crucial to follow all selection, installation, and usage guidelines outlined in the product manual or adhere to relevant national standards meticulously.
Note: The N-pole type of a 4P circuit breaker is classified into A-type and B-type. In the absence of specific specifications, the default classification is B-type.
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