| 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 formidable force, showcasing a rated insulation voltage of 800V. Expertly designed for AC distribution networks at 50Hz/60Hz, it operates with a rated working voltage of up to 690V and a rated current of up to 1250A. Perfectly suited for power distribution and circuit protection, it ensures the defense of equipment against overloads, short-circuits, under-voltage, and more. Capable of sporadic circuit conversions and motor initiations, it offers unmatched flexibility. Installable in both vertical and horizontal positions, it demonstrates versatile usability. Identified for isolation by the symbol ' ', the DAM2 MCCB adheres strictly to IEC60947-2 standards for low-voltage switchgear and control devices, solidifying its position as an exemplary circuit breaker.
1. Ambient air temperature: Keep between -5ºC to +40ºC, ensuring that the daily average remains below +35ºC.
2. Altitude: Ensure the installation site altitude is within 2000 meters to maintain peak performance.
3. Atmospheric conditions: At +40ºC, relative humidity should not surpass 50%, though higher humidity is acceptable at lower temperatures. The maximum average relative humidity is 90%, with a minimum monthly average temperature of +25ºC, accounting for possible condensation due to temperature fluctuations.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole types:
Type A: N-pole devoid of over-current release components, remains consistently connected, and does not operate in tandem with the other three poles.
Type B: N-pole without over-current release components, operates concurrently 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 an extensive 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 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 power ratings: 630, 700, and 800 A, these options cater to diverse and demanding electrical needs, ensuring robust circuit protection and unmatched reliability.
DAM2-1250 MCCB: Experience unparalleled flexibility with ratings of 800, 1000, and 1250 A. Each meticulously crafted to exceed your most stringent specifications, delivering exceptional performance and peace of mind.
Remark: Please be advised that our 6A variant is exclusively engineered as an electromagnetic (instantaneous) type. Due to its specialized design, we do not recommend it for general usage.
Wiring Options: Experience limitless installation possibilities with our versatile configurations. Choose from front-of-board, back-of-board, or insertion-type wiring to customize your setup effortlessly to meet your precise requirements.
Over-Current Release Patterns: Choose from our expertly engineered thermodynamic-electromagnetic (dual) type or electromagnetic (instantaneous) type for your needs. Each pattern ensures optimal performance and caters to a wide array of requirements.
Outfit Options: Tailor your circuit breaker solution with or without outfit options. This customizable feature allows seamless alignment with specific application needs for maximum efficiency.
Outfit Details: Enhance your system with a comprehensive range of accessories. Internally, select shunt release, under-voltage release, auxiliary contact, and alarm contact. Externally, benefit from advanced turning handle and power-driven operation mechanisms for superior integration and performance.
Breaking Capacity: Explore a diverse range of breaking capacities with our L-standard, M-second high, and H-high breaking types. Each type is engineered with precision to cater to a variety of applications, offering exceptional accuracy and reliability.
1. Instantaneous Action Characteristics: For distribution circuit breakers, enjoy a setting value of 10In±20%. The DAM2-1250 model is precisely set at 7In±20%. Motor protection circuit breakers feature a 12In±20% setting, ensuring consistent and reliable performance.
2. Rated Values: For comprehensive insights, refer to Table 2, which details the rated values of our circuit breakers, providing you with all the essential specifications needed for informed decision-making.
3. Ambient Temperature: At +40ºC, discover the over-current release action characteristics for distribution circuit breakers in Table 3 and for motor protection circuit breakers in Table 4, ensuring peak performance under various conditions.
Rated Value: Explore the intricate specifications of the circuit breaker's rated value, designed to deliver trustworthy and efficient performance across a multitude 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, each type's breaking index mirrors the M-type, guaranteeing consistent and reliable performance throughout.
Inverse Time Breaking Action: Delve into the characteristics of over-current release for power distribution, ensuring steadfast protection 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 setting value of 10In±20%, while motor protection circuit breakers maintain a stronghold at 12In±20%, offering unwavering and dependable protection.
Inverse Time Breaking Action: Study the over-current release characteristics for motor protection, ensuring reliable 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: Crafted for maximum efficiency with a rated control supply voltage of AC50Hz, 230V, 400V, or DC110V, 220V, 24V. It guarantees reliable circuit breaker operation within a 70%~110% voltage range.
DC24V Shunt Release: Ensure dependable functionality by adhering to the prescribed maximum copper wire length, vital for optimal operation.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: Should specifications in the table be unmet, we recommend designing the shunt release control circuit as illustrated for assured efficacy and performance.
1.2 Under-Voltage Release
Under-Voltage Operation: Immerse yourself in an extraordinary realm of unwavering reliability with our state-of-the-art under-voltage release system. Masterfully designed to guarantee seamless breaker operation even amidst supply voltage fluctuations ranging from 70% to 35% of the rated voltage, it offers rock-solid protection and unparalleled peace of mind.
Under-Voltage Protection: Our cutting-edge feature stands as a vigilant guardian, preventing the potentially hazardous closure of circuit breakers when voltage falls below 35% of the rated threshold. It ensures secure closure beyond 85%, steadfastly upholding safety and consistent performance in every operation.
Closing Mechanism: Our advanced under-voltage release mechanism promises a robust circuit breaker closure when supply voltages exceed 85% of the rated value. This not only safeguards your systems but also ensures flawless operations, providing an unmatched safety net.
Under-Voltage Ratings: With meticulous ratings at AC50Hz for both 230V and 400V, our breakers consistently deliver steadfast performance across various applications, ensuring peace of mind with each use.
400V.
Special Note: Our circuit breakers, meticulously engineered with an under-voltage release function, operate seamlessly only at the rated voltage. This design ensures secure and trustworthy opening and closing operations, fortifying safety in every function.
normally.
1.3 Pre-Paid Meter Dedicated Release
The pre-paid meter dedicated release, rated at AC230/50Hz, delivers exceptional performance across a remarkable range of 65% to 110% of Ue. Upon control disengagement, the circuit breaker initiates a strategically timed opening between 0.5 and 2 seconds, ensuring unparalleled 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 meticulously designed to remain dormant during normal operations. They transition seamlessly between normal open and normal closed states solely during free or fault tripping events, ensuring precise and timely alerts only when absolutely necessary.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Explore comprehensive specifications, including precise rated values and corresponding codes, 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: After a circuit breaker trips via an electric operating mechanism, resetting the circuit breaker is crucial before attempting any reclosing, ensuring 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, boasting a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, dual release, and shunt release. It is finely optimized for motor protection with a rated current of 63A.
To ensure unmatched performance, ensure that all selection, installation, and usage strictly follow 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. When specifications are unspecified, the default designation is B-type.
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