| 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 a powerhouse, designed with a rated insulation voltage of 800V. Perfectly suited for AC distribution networks of 50Hz/60Hz, it handles a rated working voltage of up to 690V and a current of up to 1250A. It excels in distributing power while safeguarding circuits and equipment from overloads, short-circuits, under-voltage, and other potential faults. Additionally, it supports infrequent circuit conversions and motor starts, offering versatility in installation - whether vertical or horizontal. Suitable for isolation, denoted by the symbol ' ', the DAM2 MCCB complies with the high standards of IEC60947-2 for low-voltage switchgear and control equipment, Part 2: circuit breakers.
1. Ambient air temperature: Maintain between -5ºC to +40ºC, ensuring an average daily temperature does not exceed +35ºC.
2. Altitude: Ensure that the installation site does not surpass an altitude of 2000 meters.
3. Atmospheric conditions: At a peak temperature of +40ºC, the relative humidity should not exceed 50%. Higher humidity levels are acceptable at reduced temperatures, with a maximum average relative humidity of 90% and a minimum average monthly temperature of +25ºC, considering temperature-induced 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, and does not operate with the other three poles.
Type B: N-pole without over-current release components, operates alongside the other three poles (N-pole activates before deactivation).
Type C: N-pole with over-current release components, operates 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 diverse requirements.
DAM2-100 MCCB Available in nine ratings: 16, 20, 25, 32, 40, 50, 63, 80, 100 A, offering versatility in application.
DAM2-250 MCCB Available in seven ratings: 100, 125, 140, 160, 180, 200, 225, 250 A, ensuring flexibility for different needs.
DAM2-400 MCCB Available in five ratings: 225, 250, 315, 350, 400 A, designed for high-performance standards.
DAM2-630 MCCB Available in three ratings: 400, 500, 630 A, for those powerful, demanding applications.
DAM2-800 MCCB Available in three ratings: 630, 700, 800 A, tailored for higher capacity needs.
DAM2-1250 MCCB available in three ratings: 800, 1000, 1250 A, for ultimate power and protection.
Remark: Please note that the 6A version is confined to electromagnetic (instantaneous) type operation and is not recommended due to its specification constraints. Choose with discretion for optimal performance.
Wiring Options: Tailor your installation with our array of wiring choices-front-of-board, back-of-board, or insertion type. These versatile options ensure seamless integration into a variety of setups.
Over-Current Release Patterns: Our circuit breakers are available in both thermodynamic-electromagnetic (dual) type and electromagnetic (instantaneous) type, designed to meet a wide range of application requirements with precision and reliability.
Outfit Options: Customize your circuit breaker to align with your specific requirements by selecting either with or without outfit options, ensuring the best fit for your electrical systems.
Outfit Details: Enhance your circuit breaker's functionality with our inner accessories, like the shunt release, under-voltage release, auxiliary contact, and alarm contact. For outer accessories, choose from turning handle operation mechanisms and power-driven operation mechanisms, providing comprehensive control solutions.
Breaking Capacity: Select from our diverse capacity options-L-standard breaking, M-second high breaking, and H-high breaking types-to perfectly match the diverse demands of your applications and ensure optimal circuit protection.
1. Instantaneous Action Characteristics: Our distribution circuit breakers boast a setting value of 10In±20%, while the DAM2-1250 model is precisely configured at 7In±20%. Motor protection circuit breakers are rigorously set to 12In±20% to ensure peak performance and safety.
2. Rated Values: For a comprehensive understanding of the rated values, please refer to Table 2, where detailed specifications are provided for our circuit breakers, ensuring you have all the information required 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 performance across varying conditions.
Rated Value: Dive into the detailed specifics of our circuit breaker's rated value, providing a clear understanding of its capabilities and ensuring it meets your 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: For our 2-pole and 4-pole circuit breakers, categorized into L, M, and H types, rest assured that the breaking index for all aligns with the M-type, providing consistency and reliability across models.
Inverse Time Breaking Action: Understand the nuanced characteristics of over-current release for power distribution, particularly when all poles are energized simultaneously, ensuring comprehensive 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 engineered with a setting value of 10In±20%, while motor protection circuit breakers are rigorously set at 12In±20%, ensuring effective and safe operation.
Inverse Time Breaking Action: Delve into the characteristics of over-current release for motor protection when all poles are equally energized, ensuring 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: Engineered for reliability, our shunt release operates under a rated control supply voltage of AC50Hz, 230V, 400V, and DC110V, 220V, 24V. It guarantees dependable performance within a 70%~110% voltage range, ensuring your circuit breaker functions flawlessly.
DC24V Shunt Release: To ensure reliable operation, the maximum length of copper wire should adhere to specified standards. This guarantees that your circuit breaker remains operational and secure.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: Should the specified table requirements not be met, design your shunt release control circuit following the provided figure, ensuring optimal functionality and safety.
1.2 Under-Voltage Release
Under-Voltage Operation: Our under-voltage release guarantees reliable circuit breaker operation when the supply voltage drops to 70%-35% of the rated voltage, maintaining safety and functionality.
Under-Voltage Protection: If the voltage falls below 35% of the rated value, the under-voltage release prevents the circuit breaker from closing. When above 85%, it ensures closure, offering both safety and operational reliability.
Closing Mechanism: To ensure secure circuit breaker operation, the under-voltage release facilitates closure at supply voltages above 85% of the rated value, optimizing system safety.
Under-Voltage Ratings: For consistent performance, our devices are rated at AC50Hz, 230V, 400V, ensuring they meet the highest standards of reliability and safety.
400V.
Special Note: Circuit breakers equipped with under-voltage releases are designed to function optimally at the rated voltage, securing safe opening and closing cycles.
normally.
1.3 Pre-Paid Meter Dedicated Release
Our state-of-the-art pre-paid meter dedicated release boasts a rated operating voltage Ue of AC230/50Hz, delivering unparalleled performance within a versatile range of 65% to 110% of Ue. In a remarkable feat of engineering, when control (Ctrl) is disengaged, the circuit breaker innovatively initiates a delayed opening, spanning from 0.5 to 2 seconds. This ensures maximum safety and reliability, providing you with peace of mind.
Wiring Diagram for Pre-Paid Meter Dedicated Release: Your guide to seamless connectivity.
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: Essential for enhanced operational efficiency.
b. Alarm Contact: Precision-engineered for reliable notifications.
Our sophisticated alarm contacts are meticulously designed to remain dormant during normal operations, switching between normal open and closed states only during free or fault tripping. This ensures precise alerts are triggered only when truly necessary.
2. External Accessories for Circuit Breakers: Enhance functionality and performance.
2.1 Motor Operating Mechanism: Explore the rated values and their corresponding codes in Table 6 for detailed 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: Post-tripping of the circuit breaker with an electric operating mechanism requires a reset before re-engagement, ensuring operational readiness.
Principle Diagram for the Opening and Closing of DAM2-63,100,225 Electric Operating Mechanism (AC): Visualize the process for optimal understanding.
Principle Diagram for Opening and Closing of DAM2-400,630,800,1250 Electric Operating Mechanism (AC): A clear view of high-capacity operations.
2.2 Installation Dimensions for Manual Operating Mechanism: Refer to Table 10 to ensure precision fit and function.
Diagram of Handle Mounting Hole for DAM2-63~800: A guide to precise installation.
Total Height of Electric/Manual Operating Mechanism of Circuit Breaker (mm) (Refer to Table 12): Ensure accurate integration with 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: Simplifying your choice for perfection.
| 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 frame rated current of 100A, offering standard breaking capacity, handle operation, 3 poles, double release, and shunt release. It's expertly designed for motor protection with a rated current of 63A.
To ensure peak performance, selection, installation, and usage must adhere strictly to the product manual or relevant national standards.
Note: The N-pole type of a 4P circuit breaker is categorized into A-type and B-type, with B-type as the default if unspecified.
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