| 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 stands as a formidable force, boasting a rated insulation voltage of 800V. Ideal for AC distribution networks of 50Hz/60Hz, it adeptly manages a rated working voltage of up to 690V and a current capacity of up to 1250A. It excels in power distribution while providing robust protection against overloads, short-circuits, under-voltage, and other potential electrical faults. Moreover, it supports infrequent circuit conversions and motor starts with ease. Its versatile installation options-both vertical and horizontal-make it a flexible fit for a variety of applications. Suitable for isolation, denoted by the symbol ' ', the DAM2 MCCB meets the stringent standards of IEC60947-2 for low-voltage switchgear and control equipment, Part 2: circuit breakers.
1. Ambient air temperature: Ensure a range between -5ºC to +40ºC, keeping the average daily temperature below +35ºC for optimal performance.
2. Altitude: The installation site should not exceed an altitude of 2000 meters, maintaining optimal operational efficiency.
3. Atmospheric conditions: At a maximum temperature of +40ºC, the relative humidity must not surpass 50%. Higher humidity levels are permissible at reduced temperatures, with an average relative humidity maximum of 90% and a minimum average monthly temperature of +25ºC, accounting for temperature-related condensation on the product's surface.
4. Pollution Degree: Level 3.
Selection of instructions
Classified by pole types:
Type A: N-pole without over-current release components, continuously connected, functioning independently from the other three poles.
Type B: N-pole without over-current release components, operates in conjunction with the other three poles (N-pole activates ahead of deactivation).
Type C: N-pole equipped with over-current release components, operates in harmony with the other three poles (N-pole activates prior to deactivation).
Classified by rated current of over-current release:
DAM2-63 MCCB Available in nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, 63 A, catering to a wide array of requirements.
DAM2-100 MCCB Available in nine ratings: 16, 20, 25, 32, 40, 50, 63, 80, 100 A, offering remarkable versatility in application.
DAM2-250 MCCB Available in seven ratings: 100, 125, 140, 160, 180, 200, 225, 250 A, ensuring adaptability for diverse needs.
DAM2-400 MCCB Available in five ratings: 225, 250, 315, 350, 400 A, engineered for superior performance standards.
DAM2-630 MCCB Available in three ratings: 400, 500, 630 A, designed for those powerful, high-demand applications.
DAM2-800 MCCB Discover unparalleled versatility with our selection of ratings: 630, 700, 800 A. Expertly engineered to meet diverse, higher capacity requirements, these options ensure your setup remains robust and future-ready.
Introducing the DAM2-1250 MCCB series: a powerful solution available in 800, 1000, and 1250 A ratings. Designed for ultimate power management and protection, these breakers are your go-to choice for uncompromised electrical safety.
Remark: Please be aware that the 6A variant is strictly limited to electromagnetic (instantaneous) type operations, posing specification constraints. Exercise due diligence in choosing the right model to ensure peak performance and reliability.
Wiring Options: Customize your setup with our comprehensive wiring configurations - front-of-board, back-of-board, or insertion type. Each versatile option is crafted to deliver seamless integration into various installation environments.
Over-Current Release Patterns: Choose from our thermodynamic-electromagnetic (dual) or electromagnetic (instantaneous) types. Tailored to meet a diverse array of application needs, these circuit breakers deliver precision and dependable performance.
Outfit Options: Tailor your circuit breaker to your specific needs by opting for models with or without additional outfits. This ensures the perfect fit for your electrical systems.
Outfit Details: Elevate your circuit breaker's capabilities with our inner accessories, including shunt release, under-voltage release, auxiliary contact, and alarm contact. Our outer accessories offer turning handle and power-driven operation mechanisms for comprehensive control solutions.
Breaking Capacity: Adapt to your distinct application demands with our range of breaking capacities - L-standard, M-second high, and H-high breaking types. Ensure optimal circuit protection matched to your specific requirements.
1. Instantaneous Action Characteristics: Our distribution circuit breakers feature a precise setting value of 10In±20%. The DAM2-1250 model is configured at 7In±20%, and our motor protection circuit breakers are set at 12In±20% for top-tier performance and safety.
2. Rated Values: For a detailed breakdown of rated values, consult Table 2. Here, you'll find comprehensive specifications for our circuit breakers, equipping you with the necessary insights for informed selection.
3. Ambient Temperature: At an ambient temperature of +40ºC, refer to the comprehensive over-current release action characteristics in Table 3 for distribution circuit breakers and Table 4 for motor protection circuit breakers, ensuring robust performance under varying conditions.
Rated Value: Explore the detailed specifications of our circuit breaker's rated value, offering a clear insight into its capabilities and ensuring it aligns with your specific application needs.
| 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, feature a breaking index that consistently aligns with M-type standards, ensuring uniformity and reliability across all models.
Inverse Time Breaking Action: Delve into the intricate characteristics of over-current release for power distribution, particularly when all poles are energized simultaneously, to guarantee comprehensive protection for your systems.
| 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: Engineered for excellence, our distribution circuit breakers maintain a setting value of 10In±20%, while motor protection circuit breakers are set at 12In±20%, ensuring efficient and safe operation.
Inverse Time Breaking Action: Explore the nuanced characteristics of over-current release for motor protection when all poles are equally energized, delivering tailored protection that meets the demands of 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: Our shunt release is designed for unwavering reliability, operating under a rated control supply voltage of AC50Hz at 230V, 400V, and DC110V, 220V, 24V. It performs optimally within a 70%~110% voltage range, guaranteeing flawless circuit breaker operation.
DC24V Shunt Release: For assured reliability, adhere to specified standards regarding the maximum length of copper wire. This ensures your circuit breaker remains operational and secure, providing peace of mind.
| 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 the table specifications aren't achieved, construct your shunt release control circuit by adhering closely to the provided schematic. This ensures peak performance and unwavering safety in your operations.
1.2 Under-Voltage Release
Under-Voltage Operation: Experience unparalleled dependability with our under-voltage release feature. It ensures your circuit breaker functions flawlessly even if the supply voltage dips to a range of 70% to 35% of its rated capacity, thereby safeguarding your system's integrity.
Under-Voltage Protection: Should the voltage descend below 35% of its rated threshold, our under-voltage release mechanism will impede the closure of your circuit breaker. Conversely, when the voltage surpasses 85%, it facilitates closure, delivering unmatched safety and assurance in operations.
Closing Mechanism: Our under-voltage release empowers your circuit breaker to close securely when supply voltages exceed 85% of their rated capacity. This optimizes the safety and reliability of your entire system.
Under-Voltage Ratings: Our devices, rated at AC50Hz, 230V, 400V, are meticulously designed to uphold stringent reliability and safety standards, ensuring consistent performance across every application.
400V.
Special Note: By equipping your circuit breakers with our under-voltage releases, you ensure they operate at peak efficiency and safety, providing seamless opening and closing cycles at the rated voltage.
normally.
1.3 Pre-Paid Meter Dedicated Release
Introducing our cutting-edge pre-paid meter dedicated release, featuring an operating voltage Ue of AC230/50Hz. It delivers extraordinary performance across a flexible range of 65% to 110% of Ue. Ingeniously, when the control (Ctrl) is disengaged, the circuit breaker intuitively initiates a delayed opening sequence of 0.5 to 2 seconds, ensuring unparalleled safety and reliability for your peace of mind.
Wiring Diagram for Pre-Paid Meter Dedicated Release: Your definitive guide to achieving seamless connectivity.
1.4 Rated Values of Auxiliary Contacts and Alarm Contacts (Refer to Table 5 for a complete overview)
| 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: Indispensable for boosting operational efficiency.
b. Alarm Contact: Expertly engineered to deliver precise notifications.
Our advanced alarm contacts are intricately designed to remain inactive during standard operations. They switch between normally open and closed states exclusively during free or fault tripping, ensuring that alerts are only triggered when genuinely necessary.
2. External Accessories for Circuit Breakers: Elevate your equipment's functionality and performance.
2.1 Motor Operating Mechanism: Delve into the rated values and accompanying codes in Table 6 for comprehensive insights.
| 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 a circuit breaker equipped with an electric operating mechanism, a reset is required prior to re-engagement, thereby ensuring your system is primed for action.
Principle Diagram for the Opening and Closing of DAM2-63,100,225 Electric Operating Mechanism (AC): Gain a visual understanding for optimal system management.
Principle Diagram for Opening and Closing of DAM2-400,630,800,1250 Electric Operating Mechanism (AC): Obtain a clear perspective on managing high-capacity operations seamlessly.
2.2 Installation Dimensions for Manual Operating Mechanism: Refer to Table 10 to ensure a precise and functional fit.
Diagram of Handle Mounting Hole for DAM2-63~800: A guide to exacting installation procedures.
Total Height of Electric/Manual Operating Mechanism of Circuit Breaker (mm) (Refer to Table 12): Ensure precise and harmonious integration within your systems.
| 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: Streamline your selection process for unparalleled performance and precision.
| 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 defines a DAM2-type molded case circuit breaker with a 100A frame rated current. It offers standard breaking capacity, handle operation, three poles, double release, and shunt release. Expertly crafted for motor protection with a 63A rated current, it ensures robust safety and performance.
To guarantee the utmost in performance excellence, it is imperative that the selection, installation, and usage of the product are executed in strict accordance with the instructions delineated in the product manual or the pertinent national standards.
Important Notice: The N-pole type for a 4P circuit breaker is divided into A-type and B-type, with B-type serving as the standard option unless otherwise specified.
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