| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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The DAM2 (CM1) series circuit breaker, with a rated insulation voltage of 800V, caters to AC distribution networks at frequencies of 50Hz/60Hz, supporting a rated working voltage up to 690V and a current rating reaching 1250A. Perfect for power distribution, it shields circuits and equipment against overloads, short-circuits, under-voltage, and various faults. Furthermore, it accommodates occasional circuit transitions and motor initiations. Versatile in nature, this breaker is adaptable for both vertical and horizontal installations, serving as an isolation device, marked by the symbol ' '. The DAM2 MCCB complies thoroughly with the IEC60947-2 standard, governing low-voltage switchgear and control apparatus, specifically for circuit breakers.
1. Ambient air temperature: Ranges from -5ºC to +40ºC, with the average daily temperature not surpassing +35ºC.
2. Altitude: Installation must occur at sites where the altitude is no greater than 2000 meters.
3. Atmospheric conditions: At a peak temperature of +40ºC, relative humidity should not exceed 50%. Increased humidity levels are acceptable at diminished temperatures. The peak average relative humidity is 90%, with a minimum monthly average temperature of +25ºC, considering potential temperature variations that might prompt condensation on the product's surface.
4. Pollution Degree: Level 3.
Selection of instructions
Classified by pole types:
Type A: N-pole without over-current release, permanently engaged, and doesn't function with the other three poles.
Type B: N-pole without over-current release, operates in tandem with the other three poles (N-pole engages before disengagement).
Type C: N-pole with over-current release, operates in coordination with the other three poles (N-pole engages before disengagement).
Classified by rated current of over-current release:
DAM2-63 MCCB available in nine current ratings: 6, 10, 16, 20, 25, 32, 40, 50, 63 A.
DAM2-100 MCCB available in nine current ratings: 16, 20, 25, 32, 40, 50, 63, 80, 100 A.
DAM2-250 MCCB available in seven current ratings: 100, 125, 140, 160, 180, 200, 225, 250 A.
DAM2-400 MCCB available in five current ratings: 225, 250, 315, 350, 400 A.
DAM2-630 MCCB available in three current ratings: 400, 500, 630 A.
DAM2-800 MCCB available in three current ratings: 630, 700, 800 A.
DAM2-1250 MCCB available in three current ratings: 800, 1000, 1250 A.
Remark: The 6A version is exclusively available in the electromagnetic (instantaneous) type due to specification constraints. It is not advised for standard use.
Wiring Options: Enjoy the flexibility of our versatile installation choices-front-of-board wiring, back-of-board wiring, or insertion type wiring to suit your setup needs.
Over-Current Release Patterns: Our range includes both thermodynamic-electromagnetic (dual) type and electromagnetic (instantaneous) type, ensuring adaptability to a variety of applications.
Outfit Options: Tailor your circuit breaker to your needs by selecting either with outfit or without outfit options for optimal customization.
Outfit Details: Enhance your circuit breaker with a variety of inner accessories like shunt release, under-voltage release, auxiliary contact, and alarm contact, plus outer accessories such as turning handle and power-driven operation mechanisms.
Breaking Capacity: Choose from our diverse range-L-standard breaking type, M-second high breaking type, and H-high breaking type-to meet all your application requirements.
1. Instantaneous Action Characteristics: Distribution circuit breakers are set at 10In±20%, while the DAM2-1250 model is at 7In±20%. For motor protection, circuit breakers are at 12In±20%.
2. Rated Values: Please refer to Table 2 for a comprehensive list of the rated values of our circuit breakers.
3. Ambient Temperature: Discover the over-current release action characteristics at +40ºC in Table 3 for distribution circuit breakers and Table 4 for motor protection circuit breakers.
Rated Value: Explore the detailed specifications of our circuit breaker's rated value for precise application compatibility.
| 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 in L, M, and H types, all have a breaking index equal to the M-type, ensuring consistent performance.
Inverse Time Breaking Action: Experience the sophisticated characteristics of over-current release during simultaneous power distribution across all poles.
| 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 breakers have a 10In±20% setting, whereas motor protection breakers are set at 12In±20% for rapid response.
Inverse Time Breaking Action: Understand the nuances of over-current release characteristics for motor protection when all poles are simultaneously powered.
| 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: Reliably operate within a control supply voltage range of AC50Hz, 230V, 400V, and DC110V, 220V, 24V, maintaining performance from 70%~110% of rated voltage.
DC24V Shunt Release: Ensure operational reliability by adhering to maximum copper wire length specifications.
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
Design Recommendations: Should the specified table values be unmet, design your shunt release control circuit according to the accompanying diagram.
1.2 Under-Voltage Release
Under-Voltage Operation: Maintain reliable operation as the supply voltage drops between 70%-35% of the rated voltage with our under-voltage release.
Under-Voltage Protection: Prevents closure below 35% of rated voltage and ensures closure above 85%, safeguarding your system's integrity.
Closing Mechanism: Achieve secure circuit breaker closure with supply voltages exceeding 85% of the rated value, thanks to our under-voltage release.
Under-Voltage Ratings: Depend on our AC50Hz, 230V, 400V ratings for assured performance.
400V.
Special Note: To ensure safe and reliable operations, circuit breakers with under-voltage release exclusively function correctly at the rated voltage.
normally.
1.3 Pre-Paid Meter Dedicated Release
The pre-paid meter dedicated release boasts a rated operating voltage Ue of AC230/50Hz, engineered to deliver seamless and dependable performance within an impressive range of 65% to 110% of Ue. In an innovative move, once the control (Ctrl) is disengaged, the circuit breaker gracefully initiates a delayed opening, spanning a carefully calculated duration of 0.5 to 2 seconds, to ensure pinnacle 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 designed to remain dormant during normal circuit breaker operations. They will seamlessly transition between normal open and normal closed states exclusively during free tripping or fault tripping, ensuring precise alerts only when truly necessary, thereby enhancing the accuracy of safety notifications.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: Detailed rated values and respective codes can be found 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 the circuit breaker trips using an electric operating mechanism, a reset of the mechanism is required to re-engage the circuit breaker, ensuring readiness for subsequent 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
Explore the Total Height of Electric/Manual Operating Mechanisms of Circuit Breakers (mm) as detailed in 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 signifies a DAM2-type molded case circuit breaker, showcasing a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, double release, equipped with shunt release, and specifically crafted for motor protection with a rated current of 63A.
For optimal performance, adherence to the product manual or compliance with relevant national standards during selection, installation, and usage is essential.
Note: The N-pole type of a 4P circuit breaker is distinguished into A-type and B-type, with B-type as the default if unspecified.
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