| 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 of performance, featuring a rated insulation voltage of 800V. Expertly engineered for AC distribution networks operating at 50Hz/60Hz, it supports a working voltage of up to 690V and a rated current soaring up to 1250A. Ideally suited for power distribution and circuit protection, it provides exceptional safeguarding against overloads, short-circuits, under-voltage, and more. It efficiently manages infrequent circuit conversions and motor starts, offering unprecedented adaptability. Whether installed vertically or horizontally, its versatility is unmatched. Recognized for isolation with the symbol " ", the DAM2 MCCB aligns seamlessly with IEC60947-2 standards for low-voltage switchgear and control equipment, underscoring its superiority in circuit breakers.
1. Ambient air temperature: Ensure a range between -5ºC to +40ºC, with the daily average temperature not exceeding +35ºC for optimal operation.
2. Altitude: The installation site must be situated at an altitude within 2000 meters to maintain optimal performance.
3. Atmospheric conditions: At temperatures of +40ºC, relative humidity should not surpass 50%, though higher humidity levels are acceptable at reduced temperatures. The maximum average relative humidity is 90%, with a minimum average monthly temperature of +25ºC, to accommodate potential condensation due to temperature fluctuations.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole types:
Type A: N-pole without over-current release components, remains consistently connected, and does not operate in conjunction with the other three poles.
Type B: N-pole without over-current release components, operates in tandem with the other three poles (N-pole activates prior to deactivation).
Type C: N-pole with over-current release components, functions in synchrony with the other three poles (N-pole activates 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 robust range of seven 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 Available in three formidable ratings: 630, 700, and 800 A.
Introducing the DAM2-1250 MCCB - a powerhouse of protection offered in three formidable ratings: 800, 1000, and 1250 A. Each option is designed to cater to your unique power distribution needs with precision and reliability.
Remark: Please be advised that our exclusive 6A version is only available in the electromagnetic (instantaneous) type. Due to its specific design parameters, this version is not suitable for general use and should be selected with precise application considerations in mind.
Wiring Options: Unleash the potential of versatile installation with our range of front-of-board, back-of-board, or insertion type wiring options. Customize your installation to suit your precise requirements and enjoy unparalleled flexibility.
Over-Current Release Patterns: Select from our thermodynamic-electromagnetic (dual) type or electromagnetic (instantaneous) type. Our options are expertly crafted to meet diverse demands, guaranteeing top-tier performance in every scenario.
Outfit Options: Tailor your circuit breaker solution by choosing between circuit breakers with outfit or without. This adaptability ensures that you can seamlessly meet the demands of specific applications with ease.
Outfit Details: Elevate your circuit breaker setup with our comprehensive selection of accessories. Inner accessories include shunt release, under-voltage release, auxiliary contact, and alarm contact. Additionally, our outer accessories incorporate advanced turning handle operation mechanisms and power-driven operation mechanisms, ensuring seamless and flexible functionality.
Breaking Capacity: Experience the power of choice with our range of breaking capacities, including the L-standard breaking type, M-second high breaking type, and H-high breaking type. Each type is meticulously engineered to address a broad array of application needs with exacting precision.
1. Instantaneous Action Characteristics: Distribution circuit breakers feature a setting value of 10In±20%. The DAM2-1250 model offers a specific setting of 7In±20%. Motor protection circuit breakers provide a robust setting of 12In±20%, ensuring steadfast performance.
2. Rated Values: For a complete view of specifications, refer to Table 2, which provides comprehensive details of the rated values of our circuit breakers, empowering you with all essential information for decision-making.
3. Ambient Temperature: Detailed in Table 3 for distribution circuit breakers and in Table 4 for motor protection circuit breakers, our over-current release action characteristics ensure optimal operation even at ambient temperatures of +40ºC, adapting to varied conditions effortlessly.
Rated Value: Delve into the precise specifications of our circuit breaker's rated value, meticulously designed to deliver reliable and efficient operation across diverse scenarios and applications.
| 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, available in L, M, and H types, the breaking index across all categories aligns with the M-type. This uniformity guarantees consistent and reliable performance across all variants.
Inverse Time Breaking Action: Explore the over-current release characteristics for power distribution, effective when all poles are fully energized, providing assured and consistent 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 come with a setting of 10In±20%, while motor protection circuit breakers boast a setting of 12In±20%, ensuring reliable, robust protection.
Inverse Time Breaking Action: Examine the characteristics of over-current release for motor protection, effective when all poles are powered simultaneously, delivering trustworthy protection.
| 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: This robust component is designed for efficient operation with a rated control supply voltage of AC50Hz, 230V, 400V, or DC110V, 220V, 24V, ensuring reliable circuit breaker performance within a 70%~110% voltage range.
DC24V Shunt Release: Maintain optimal performance by strictly adhering to the specified maximum length of copper wire, a key factor in ensuring reliable operation.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: If the specified conditions are unmet in the table, it is advised to design the shunt release control circuit according to the provided figure to ensure guaranteed efficiency.
1.2 Under-Voltage Release
Under-Voltage Operation: Our under-voltage release component ensures reliable circuit breaker operation even when the supply voltage drops to 70%-35% of the rated voltage, delivering consistent and dependable protection.
Under-Voltage Protection: This crucial safety feature acts as a vigilant gatekeeper, preventing the circuit breaker from closing when the voltage dips below 35% of its rated capacity. It ensures secure closure only when the voltage rises above 85%, guaranteeing a safe and consistent operational environment.
Closing Mechanism: With precision engineering, the under-voltage release mechanism ensures that circuit breaker closure is only achieved when supply voltages surpass 85% of the rated threshold, offering robust protection and operational security.
Under-Voltage Ratings: Designed for optimal performance at AC50Hz, 230V, and 400V, this feature promises steadfast reliability across a multitude of applications, providing peace of mind to users.
400V.
Special Note: Our circuit breakers, equipped with under-voltage release technology, function precisely only at designated rated voltages. This ensures a reliable and safe mechanism for both the opening and closing functions, fortifying system dependability.
normally.
1.3 Pre-Paid Meter Dedicated Release
The pre-paid meter dedicated release boasts a rated operating voltage Ue of AC230/50Hz, exhibiting exceptional performance from 65% to 110% of Ue. Ingeniously, once the control (Ctrl) is disengaged, the circuit breaker initiates a strategically controlled delayed opening between 0.5 to 2 seconds. This design ensures 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 expertly crafted to remain inactive during standard operations. They smartly transition between normally open and normally closed states only upon free or fault tripping of the circuit breaker, ensuring precise alerts are provided only when necessary.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Find intricate specifications, including rated values and corresponding codes, 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 with an electric operating mechanism trips, it is crucial to reset the mechanism before attempting to reclose, ensuring safety and reliability.
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, featuring a frame rated current of 100A, a standard breaking capacity, handle operation, 3 poles, double release, and a shunt release. It is optimized for motor protection with a rated current of 63A.
For optimal performance, ensure that selection, installation, and use align strictly with the product manual or corresponding national standards.
Note: The N-pole type in a 4P circuit breaker is categorized into A-type and B-type. In the absence of specific instructions, the default is B-type.
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