| 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, boasting a rated insulation voltage of 800V. It's expertly crafted for AC distribution networks at 50Hz/60Hz, with a rated working voltage reaching up to 690V and a rated current up to 1250A. Perfect for power distribution and circuit protection, it safeguards equipment from overloads, short-circuits, under-voltage, and more. It accommodates infrequent circuit conversions and motor starts, delivering unmatched adaptability. Install it vertically or horizontally-it's versatile enough for both. Recognized for isolation by the symbol " ", the DAM2 MCCB aligns with IEC60947-2 standards for low-voltage switchgear and control equipment, reaffirming its excellence in circuit breakers.
1. Ambient air temperature: Maintain between -5ºC to +40ºC, ensuring that the daily average does not surpass +35ºC.
2. Altitude: Ensure installation site altitude remains within 2000 meters to optimize performance.
3. Atmospheric conditions: At +40ºC, relative humidity shouldn't exceed 50%, yet higher humidity is acceptable at reduced temperatures. The maximum average relative humidity is 90%, with a minimum average monthly 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 without over-current release components, stays continuously connected, and does not operate alongside the other three poles.
Type B: N-pole without over-current release components, operates in unison with the other three poles (N-pole activates prior to deactivation).
Type C: N-pole with over-current release components, functions along 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, available in three commanding ratings: 800, 1000, and 1250 A.
Remark: Please note that our 6A version is exclusively available in the electromagnetic (instantaneous) type. Due to specification constraints, it is not recommended for general use.
Wiring Options: Experience versatile installation with our selection of front-of-board, back-of-board, or insertion type wiring. Tailor your setup to meet your exact needs.
Over-Current Release Patterns: Choose from our thermodynamic-electromagnetic (dual) type or electromagnetic (instantaneous) type. Each option is crafted to fulfill a variety of requirements, ensuring optimal performance.
Outfit Options: Customize your solution by selecting either circuit breakers with outfit or without. This flexibility ensures you meet specific application demands effortlessly.
Outfit Details: Elevate your setup with our extensive range of accessories. Inner accessories include shunt release, under-voltage release, auxiliary contact, and alarm contact. Meanwhile, our outer accessories feature advanced turning handle operation mechanisms and power-driven operation mechanisms, guaranteeing seamless functionality.
Breaking Capacity: Discover our diverse range of breaking capacities, including L-standard breaking type, M-second high breaking type, and H-high breaking type, designed to accommodate a spectrum of applications with precision.
1. Instantaneous Action Characteristics: For distribution circuit breakers, the setting value is 10In±20%. For the DAM2-1250 model, it is 7In±20%. For motor protection circuit breakers, enjoy a setting value of 12In±20%, ensuring robust performance.
2. Rated Values: For comprehensive specifications, please refer to Table 2, which details the rated values of our circuit breakers, ensuring you have all the necessary information at your fingertips.
3. Ambient Temperature: At a temperature of +40ºC, the over-current release action characteristics are detailed in Table 3 for distribution circuit breakers, and in Table 4 for motor protection circuit breakers, ensuring optimal operation in varied conditions.
Rated Value: Explore the detailed specifications of the rated value of the circuit breaker, designed to provide reliable and efficient operation in any scenario.
| 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, classified into L, M, and H types, the breaking index for all categories is equivalent to that of the M-type. This uniformity ensures consistent performance.
Inverse Time Breaking Action: Discover the characteristics of over-current release for power distribution, effective when all poles are powered simultaneously, ensuring reliable 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: Distribution circuit breakers offer a setting value of 10In±20%, while motor protection circuit breakers are set at 12In±20%, providing robust and reliable performance.
Inverse Time Breaking Action: Explore the characteristics of over-current release for motor protection, effective when all poles are powered simultaneously, delivering dependable safeguarding.
| 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 to operate efficiently 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 reliable operation by adhering to the specified maximum length of copper wire, crucial for optimal performance.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: Should the specifications outlined in the above table not be met, we recommend designing the shunt release control circuit as per the provided figure for guaranteed efficacy.
1.2 Under-Voltage Release
Under-Voltage Operation: The under-voltage release ensures reliable breaker operation when supply voltage dips to 70%-35% of the rated voltage, offering dependable protection.
Under-Voltage Protection: This feature prevents circuit breaker closure when voltage falls below 35% of the rated level, and assures closure above 85%, ensuring safe and consistent functionality.
Closing Mechanism: The under-voltage release mechanism ensures secure circuit breaker closure at supply voltages exceeding 85% of the rated value, safeguarding operations.
Under-Voltage Ratings: With ratings at AC50Hz, 230V, 400V, expect reliable performance across various applications, delivering peace of mind.
400V.
Special Note: Our circuit breakers equipped with under-voltage release operate correctly only at the rated voltage, ensuring safe and dependable opening and closing.
normally.
1.3 Pre-Paid Meter Dedicated Release
The rated operating voltage Ue of the pre-paid meter dedicated release is AC230/50Hz, ensuring exemplary performance across a wide spectrum from 65% to 110% of Ue. Remarkably, upon disengagement of the control (Ctrl), the circuit breaker will initiate a strategically delayed opening, spanning from 0.5 to 2 seconds. This feature is ingeniously designed to deliver unparalleled 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 meticulously crafted to remain inactive under normal operational circumstances. They transition between normal open and normal closed states only when the circuit breaker experiences free tripping or fault tripping, thus ensuring precise and timely alerts solely when required.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Detailed specifications, including rated values and corresponding codes, are outlined 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: Following the tripping of the circuit breaker with an electric operating mechanism, it is imperative for the mechanism to reset the circuit breaker prior to any attempt at reclosing.
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 denotes a DAM2-type molded case circuit breaker. This model boasts a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, double release, with shunt release, optimized for motor protection with a rated current of 63A.
Selection, installation, and use must strictly adhere to the product manual or relevant national standards to guarantee unparalleled performance.
Note: The N-pole type of a 4P circuit breaker is classified into A-type and B-type. In instances where specification is absent, the default designation is B-type.
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