| 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 robust powerhouse, featuring an impressive rated insulation voltage of 800V. Expertly engineered for AC distribution networks at 50Hz/60Hz, it manages a rated working voltage of up to 690V and a rated current of up to 1250A. Perfect for power distribution and circuit protection, it safeguards equipment against overloads, short-circuits, under-voltage, and more. Capable of accommodating infrequent circuit conversions and motor starts, it offers remarkable adaptability. Installable in both vertical and horizontal orientations, it showcases unparalleled usability. Designated for isolation by the symbol " ", the DAM2 MCCB strictly conforms to IEC60947-2 standards for low-voltage switchgear and control equipment, affirming its status as an exemplary circuit breaker.
1. Ambient air temperature: Ensure maintenance between -5ºC to +40ºC, with the daily average not surpassing +35ºC.
2. Altitude: Confirm installation site altitude remains within 2000 meters to ensure optimal performance.
3. Atmospheric conditions: At +40ºC, relative humidity should not exceed 50%, although higher humidity is permissible at lower temperatures. The maximum average relative humidity is 90%, with a minimum average monthly temperature of +25ºC, considering possible condensation due to temperature variations.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole types:
Type A: N-pole without over-current release components, remains continuously connected, independent from the other three poles.
Type B: N-pole without over-current release components, operates in concert with the other three poles (N-pole initiates prior to deactivation).
Type C: N-pole with over-current release components, functions cohesively with the other three poles (N-pole initiates before deactivation).
Classified by rated current of over-current release:
DAM2-63 MCCB Available in a comprehensive selection of nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, and 63 A.
DAM2-100 MCCB Available in nine versatile ratings: 16, 20, 25, 32, 40, 50, 63, 80, and 100 A.
DAM2-250 MCCB Available in a solid range of eight ratings: 100, 125, 140, 160, 180, 200, 225, and 250 A.
DAM2-400 MCCB Available in five distinct ratings: 225, 250, 315, 350, and 400 A.
DAM2-630 MCCB Available in three robust ratings: 400, 500, and 630 A.
DAM2-800 MCCB Introducing a versatile array of robust options: available in impressive ratings of 630, 700, and 800 A. Each variant is tailored to meet your specific needs for optimal electrical performance.
DAM2-1250 MCCB: Discover unparalleled flexibility with our remarkable selection, boasting ratings of 800, 1000, and 1250 A. Designed to meet the most stringent demands, these circuit breakers empower your setup with unmatched reliability and strength.
Remark: Please be aware that our exclusive 6A version is expertly engineered in the electromagnetic (instantaneous) type. Due to its specialized nature, it is not recommended for general applications, ensuring safety and specificity in its use.
Wiring Options: Discover seamless adaptability in your installations with our versatile selection: choose from front-of-board, back-of-board, or insertion type wiring. Effortlessly tailor your configuration to match your precise requirements with unparalleled flexibility.
Over-Current Release Patterns: Choose from our expertly crafted options: the thermodynamic-electromagnetic (dual) type or the electromagnetic (instantaneous) type. Each configuration is meticulously designed to meet diverse application needs, guaranteeing superior performance and precision.
Outfit Options: Tailor your system with ease by selecting circuit breakers with or without additional outfits. This customizable aspect ensures seamless alignment with your specific application requirements, enhancing both functionality and efficiency.
Outfit Details: Enhance your system with a comprehensive suite of accessories. Elevate inner functionalities with options such as shunt release, under-voltage release, auxiliary contact, and alarm contact. Explore advanced outer accessories like the turning handle and power-driven mechanisms for exceptional integration and functionality.
Breaking Capacity: Experience a broad range of breaking capacities, expertly engineered in L-standard, M-second high, and H-high categories. Each type is precisely crafted to deliver exceptional accuracy and performance across various applications.
1. Instantaneous Action Characteristics: For distribution circuit breakers, benefit from a precise setting value of 10In±20%. The DAM2-1250 model is fine-tuned at 7In±20%. Motor protection circuit breakers offer steadfast performance with a setting value of 12In±20%.
2. Rated Values: For a detailed understanding, refer to Table 2, which comprehensively presents the rated values of our circuit breakers. Equip yourself with all the essential specifications needed for informed decisions.
3. Ambient Temperature: At an ambient temperature of +40ºC, explore the detailed over-current release action characteristics for distribution circuit breakers in Table 3, and for motor protection circuit breakers in Table 4. Ensure optimal performance under various conditions.
Rated Value: Immerse yourself in the detailed specifications of the circuit breaker's rated value. Each aspect is engineered for reliability and efficiency, ensuring superior performance across a wide array of scenarios.
| 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 categorized into L, M, and H types, the breaking index for each type mirrors that of the M-type, ensuring uniformity and consistent performance.
Inverse Time Breaking Action: Explore the characteristics of over-current release tailored for power distribution, delivering reliable protection even when all poles are energized simultaneously.
| 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 possess a precise setting value of 10In±20%, while motor protection circuit breakers maintain a robust 12In±20%, offering unwavering protection and reliability.
Inverse Time Breaking Action: Delve into the over-current release characteristics crafted for motor protection, ensuring dependable safeguarding with concurrent power across all poles.
| 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: Achieve optimal efficiency with a rated control supply voltage of AC50Hz, 230V, 400V, or DC110V, 220V, 24V. It ensures reliable circuit breaker operation within a 70%~110% voltage range, guaranteeing consistent performance.
DC24V Shunt Release: Ensure dependable functionality by adhering to the prescribed maximum copper wire length, essential for optimal operational efficiency.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: Should table specifications be unmet, we recommend designing the shunt release control circuit as illustrated, ensuring assured effectiveness and reliability.
1.2 Under-Voltage Release
Under-Voltage Operation: Discover the pinnacle of reliability with our meticulously crafted under-voltage release. This advanced feature is engineered to ensure seamless breaker performance amidst voltage fluctuations ranging from 70% to 35% of the rated voltage, offering steadfast protection and unyielding peace of mind.
Under-Voltage Protection: Our cutting-edge technology vigilantly prevents unsafe circuit breaker closures when the voltage drops below 35% of the rated threshold. It safeguards secure closures above 85%, ensuring a harmonious blend of safety and consistent performance in every operation.
Closing Mechanism: Our sophisticated under-voltage release mechanism guarantees robust circuit breaker closures at supply voltages exceeding 85% of the rated value. This provides an exceptional safety net, ensuring flawless operations and unparalleled protection for your systems.
Under-Voltage Ratings: Engineered with ratings at AC50Hz for both 230V and 400V, our breakers assure unwavering performance across diverse applications, delivering peace of mind with every single use.
400V.
Special Note: Designed with precision, our circuit breakers operate seamlessly at the rated voltage, thanks to the under-voltage release function. This ensures dependable opening and closing operations, reinforcing safety in every action.
normally.
1.3 Pre-Paid Meter Dedicated Release
The pre-paid meter dedicated release is engineered at AC230/50Hz, offering exceptional performance over an impressive range of 65% to 110% of Ue. Remarkably, the circuit breaker initiates a precisely timed opening from 0.5 to 2 seconds once control disengagement occurs, providing unmatched safety and reliability for your peace of mind.
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 crafted to remain inactive during normal operations. They transition smoothly between normal open and normal closed states solely during free or fault tripping events, ensuring timely and accurate alerts only when truly necessary.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Explore comprehensive specifications, including precise rated values and corresponding 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 a circuit breaker trips via an electric operating mechanism, ensure to reset the circuit breaker before any reclosing attempts to maintain consistent and safe operations.
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: DAM2L-100 / 33102 63A exemplifies a DAM2-type molded case circuit breaker. This impressive model boasts a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, dual release, and shunt release. It is meticulously optimized for motor protection with a rated current of 63A.
For unparalleled performance, ensure all selection, installation, and usage strictly adhere to the product manual or relevant national standards.
Note: The N-pole type of a 4P circuit breaker is classified into A-type and B-type. In the absence of specific instructions, the default designation is B-type.
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