| 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, featuring a rated insulation voltage of 800V. Meticulously engineered for AC distribution networks at 50Hz/60Hz, it handles a rated working voltage of up to 690V and a rated current of up to 1250A. Ideal for power distribution and circuit protection, it ensures safeguarding of equipment against overloads, short-circuits, under-voltage, and more. Capable of accommodating infrequent circuit conversions and motor starts, it offers unparalleled adaptability. Installable in both vertical and horizontal orientations, it showcases versatile usability. Designated for isolation by the symbol " ", the DAM2 MCCB strictly adheres to IEC60947-2 standards for low-voltage switchgear and control equipment, cementing its stature as an exemplary circuit breaker.
1. Ambient air temperature: Maintain between -5ºC to +40ºC, ensuring that the daily average does not exceed +35ºC.
2. Altitude: Ensure the installation site altitude remains within 2000 meters to maintain optimal performance.
3. Atmospheric conditions: At +40ºC, relative humidity should not exceed 50%, yet higher humidity is permissible at reduced temperatures. The maximum average relative humidity is 90%, with a minimum average monthly temperature of +25ºC, considering potential 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, and does not operate in conjunction with the other three poles.
Type B: N-pole without over-current release components, operates simultaneously with the other three poles (N-pole activates prior to deactivation).
Type C: N-pole with over-current release components, functions in harmony 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 ratings: 630, 700, and 800 A.
DAM2-1250 MCCB: Unleash the power of choice with three formidable ratings: 800, 1000, and 1250 A, crafted to meet your most demanding specifications.
Remark: Kindly note that our specialized 6A version is exclusively engineered in the electromagnetic (instantaneous) type. Due to its specific constraints, general use is not advisable.
Wiring Options: Unlock the versatility of installation with our adaptable selection: front-of-board, back-of-board, or insertion type wiring. Customize your setup to precisely match your requirements with ease.
Over-Current Release Patterns: Select from our expertly designed thermodynamic-electromagnetic (dual) type or electromagnetic (instantaneous) type. Each pattern is meticulously crafted to meet diverse requirements, ensuring peak performance.
Outfit Options: Personalize your solution by opting for circuit breakers with or without outfit. This adaptable feature ensures you can effortlessly align with specific application needs.
Outfit Details: Elevate your system with a broad spectrum of accessories. Inner options include shunt release, under-voltage release, auxiliary contact, and alarm contact. Our outer accessories boast advanced turning handle and power-driven operation mechanisms, ensuring seamless integration and functionality.
Breaking Capacity: Embrace a wide spectrum of breaking capacities with our L-standard, M-second high, and H-high breaking types. Each is precisely engineered to suit various applications with exceptional accuracy.
1. Instantaneous Action Characteristics: For distribution circuit breakers, experience a setting value of 10In±20%. The DAM2-1250 model is set at 7In±20%. Motor protection circuit breakers boast a setting value of 12In±20%, ensuring steadfast performance.
2. Rated Values: For a comprehensive understanding, please consult Table 2, which outlines the rated values of our circuit breakers, equipping you with all essential specifications.
3. Ambient Temperature: With a temperature at +40ºC, the over-current release action characteristics for distribution circuit breakers are delineated in Table 3. Refer to Table 4 for motor protection circuit breakers, ensuring optimal performance across various conditions.
Rated Value: Delve into the detailed specifications of the circuit breaker's rated value, engineered to provide reliable and efficient performance across diverse 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 classified into L, M, and H types, each type's breaking index is equivalent to the M-type, ensuring 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 powered concurrently.
| 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 feature a setting value of 10In±20%, while motor protection circuit breakers maintain a robust 12In±20%, offering steadfast and reliable protection.
Inverse Time Breaking Action: Analyze the over-current release characteristics for motor protection, ensuring dependable safeguarding with simultaneous 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: Designed for optimal efficiency with a rated control supply voltage of AC50Hz, 230V, 400V, or DC110V, 220V, 24V. It promises reliable circuit breaker functionality within a 70%~110% voltage range.
DC24V Shunt Release: Secure reliable functionality by following the specified maximum copper wire length, essential 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: If specifications in the table are unmet, we suggest designing the shunt release control circuit as illustrated for assured efficacy.
1.2 Under-Voltage Release
Under-Voltage Operation: Experience unwavering reliability with our under-voltage release, expertly engineered to ensure flawless breaker operation during supply voltage fluctuations between 70% and 35% of the rated voltage. This provides robust protection and peace of mind.
Under-Voltage Protection: Our advanced feature stands guard against unsafe circuit breaker closures when voltage plummets below 35% of the rated threshold. It guarantees secure closure beyond 85%, upholding safety and consistent performance in every operation.
Closing Mechanism: The state-of-the-art under-voltage release mechanism ensures robust circuit breaker closure at supply voltages surpassing 85% of the rated value. This protects and guarantees flawless operations, providing an unmatched safety net for your systems.
Under-Voltage Ratings: Featuring ratings at AC50Hz for both 230V and 400V, our breakers promise steadfast performance across diverse applications, ensuring peace of mind with every use.
400V.
Special Note: Meticulously engineered, our circuit breakers with under-voltage release function seamlessly only at the rated voltage. This ensures secure and trustworthy opening and closing operations, reinforcing safety in every function.
normally.
1.3 Pre-Paid Meter Dedicated Release
The pre-paid meter dedicated release is rated at AC230/50Hz, delivering exceptional performance across a remarkable range of 65% to 110% of Ue. Notably, the circuit breaker initiates a strategically timed opening between 0.5 and 2 seconds upon control disengagement, offering 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
Alarm contacts are expertly designed to remain dormant during normal operations. They seamlessly transition 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: Discover 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 circuit breaker tripping using an electric operating mechanism, resetting the circuit breaker is crucial before any reclosing attempts to ensure 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 represents a DAM2-type molded case circuit breaker. This exemplary model features a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, dual release, and shunt release. It's finely optimized for motor protection with a rated current of 63A.
For unmatched performance, ensure 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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