| 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 powerhouse in its class, featuring a rated insulation voltage of 800V. Expertly crafted for the demanding AC distribution networks operating at 50Hz/60Hz, it offers a rated working voltage of up to 690V and a rated current reaching an impressive 1250A. Ideally suited for power distribution and circuit protection, this breaker provides robust safeguarding against overloads, short-circuits, under-voltage, and more. It adeptly accommodates infrequent circuit conversions and motor starts, delivering unrivaled adaptability. Whether installed vertically or horizontally, its versatility is unmatched. Recognized for isolation by the symbol " ", the DAM2 MCCB adheres to the stringent IEC60947-2 standards for low-voltage switchgear and control equipment, reinforcing its unparalleled excellence in circuit breakers.
1. Ambient air temperature: Ensure it remains between -5ºC and +40ºC, with the daily average not exceeding +35ºC.
2. Altitude: To ensure optimal performance, the installation site altitude should be within 2000 meters.
3. Atmospheric conditions: At +40ºC, the relative humidity should not exceed 50%. However, higher humidity levels are permissible at reduced temperatures. The maximum average relative humidity is 90%, with a minimum average monthly temperature of +25ºC. Consideration for possible condensation resulting from temperature fluctuations must be taken into account.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole types:
Type A: N-pole without over-current release components, remains continuously connected, and operates independently from the other three poles.
Type B: N-pole without over-current release components, operates synchronously with the other three poles (N-pole activates before deactivation).
Type C: N-pole with over-current release components, functions in harmony with the other three poles (N-pole activates prior to deactivation).
Classified by rated current of over-current release:
DAM2-63 MCCB This model offers an extensive selection of nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, and 63 A, providing versatile solutions for your needs.
DAM2-100 MCCB Available in nine versatile ratings, ranging from 16 to 100 A, including 16, 20, 25, 32, 40, 50, 63, 80, and 100 A, catering to a broad spectrum of requirements.
DAM2-250 MCCB This model is available in a solid range of seven ratings: 100, 125, 140, 160, 180, 200, 225, and 250 A, ensuring a robust choice for various applications.
DAM2-400 MCCB With five distinct ratings available: 225, 250, 315, 350, and 400 A, this model caters to the demand for diverse and powerful solutions.
DAM2-630 MCCB Offering three robust ratings: 400, 500, and 630 A, this model is designed to meet the needs of more demanding applications.
DAM2-800 MCCB Available in three formidable ratings: 630, 700, and 800 A, this model is built to handle the most challenging demands with ease.
Introducing the commanding DAM2-1250 MCCB, available in three powerful ratings: 800, 1000, and 1250 A. Elevate your circuit protection with unmatched reliability and performance.
Remark: Please be informed that our exclusive 6A version is crafted specifically as an electromagnetic (instantaneous) type. Due to its unique specification constraints, it is not recommended for typical general usage.
Wiring Options: Unlock versatile possibilities with our innovative wiring solutions. Choose from front-of-board, back-of-board, or insertion type options, allowing you to tailor your installation to meet precise requirements effortlessly.
Over-Current Release Patterns: Tailor your circuit protection with our dual thermodynamic-electromagnetic type or swift electromagnetic (instantaneous) type. Each option is meticulously engineered to cater to diverse performance needs seamlessly.
Outfit Options: Personalize your setup with the choice of circuit breakers with or without outfit. This adaptable solution ensures seamless alignment with specific application requirements.
Outfit Details: Transform your configuration with our extensive selection of accessories. Our sophisticated inner components include shunt release, under-voltage release, auxiliary contacts, and alarm contacts. Enhance functionality with our outer accessories, featuring advanced turning handle and power-driven operation mechanisms.
Breaking Capacity: Explore our versatile breaking capabilities with L-standard, M-second high, and H-high breaking types. Each designed to meet a diverse range of applications with exceptional precision.
1. Instantaneous Action Characteristics: Distribution circuit breakers provide a setting value of 10In±20%, while the DAM2-1250 model offers 7In±20%. Experience robust performance with motor protection circuit breakers set at 12In±20%.
2. Rated Values: For detailed specifications, consult Table 2 to understand the full range of rated values for our circuit breakers, providing comprehensive insights at your convenience.
3. Ambient Temperature: At +40ºC, refer to Table 3 for distribution circuit breakers and Table 4 for motor protection circuit breakers for detailed action characteristics, ensuring superior operation across varied environments.
Rated Value: Delve into the comprehensive specifications of our rated value circuit breakers, engineered for steadfast and efficient performance across all 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 our 2-pole and 4-pole circuit breakers, categorized into L, M, and H types, the breaking index is standardized to the M-type across all categories, guaranteeing uniform and consistent performance.
Inverse Time Breaking Action: Examine the characteristics of over-current release for power distribution, ensuring reliable protection when all poles are simultaneously powered.
| 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 set at 10In±20%, while motor protection circuit breakers are established at 12In±20%, ensuring steadfast and robust performance.
Inverse Time Breaking Action: Investigate the over-current release characteristics for motor protection, ensuring dependable safeguarding when all poles are energized.
| 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: Designed for optimal operation with rated control supply voltages of AC50Hz, 230V, 400V, or DC110V, 220V, 24V. Depend on its reliability within a 70%~110% voltage range for effective circuit breaker functionality.
DC24V Shunt Release: Ensure the reliable functioning of your system by strictly following the specified maximum copper wire length guidelines for peak performance.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: If the specifications in the above table are not met, we strongly advise designing the shunt release control circuit according to the provided figure to guarantee optimal efficacy.
1.2 Under-Voltage Release
Under-Voltage Operation: Our innovative under-voltage release guarantees seamless and reliable breaker activation when there is a dip in supply voltage ranging from 70% down to 35% of the rated voltage. This ensures robust protection and trustworthy performance.
Under-Voltage Protection: This sophisticated feature prevents the circuit breaker from closing when the voltage plummets below 35% of the rated threshold, while ensuring closure above 85%. Experience unparalleled safety and consistency in operations.
Closing Mechanism: The intelligent under-voltage release mechanism assures secure circuit breaker closure when supply voltages exceed 85% of the rated capacity, providing a strong safeguard for your operations.
Under-Voltage Ratings: Designed for AC50Hz, 230V, and 400V, our breaker ensures consistent and reliable performance across diverse applications, guaranteeing your peace of mind.
400V.
Special Note: Our circuit breakers, equipped with an advanced under-voltage release, function optimally only at the rated voltage, assuring safe and reliable opening and closing every time.
normally.
1.3 Pre-Paid Meter Dedicated Release
The rated operating voltage Ue for the pre-paid meter dedicated release is AC230/50Hz, providing outstanding performance from 65% to 110% of Ue. Notably, upon control (Ctrl) disengagement, the circuit breaker initiates a strategically delayed opening within 0.5 to 2 seconds, ingeniously crafted for 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
Alarm contacts are expertly designed to remain inactive under standard operational conditions. They transition between normal open and closed states solely during free or fault tripping of the circuit breaker, ensuring precise and timely alerts only when necessary.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Comprehensive specifications, complete with rated values and corresponding codes, are meticulously 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: It is crucial that after any tripping of the circuit breaker using the electric operating mechanism, the mechanism must reset the circuit breaker before attempting any reclosing actions.
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 represents a DAM2-type molded case circuit breaker. This exceptional model features a frame with a rated current of 100A, standard breaking capacity, handle operation, 3 poles, double release, and a shunt release, all carefully optimized for motor protection with a rated current of 63A.
Selection, installation, and usage must strictly comply with the product manual or applicable national standards to ensure unparalleled performance and satisfaction.
Note: The N-pole type of a 4P circuit breaker is categorized into A-type and B-type. When specifications are not provided, the default designation is B-type.
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