| 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, is engineered for AC distribution networks operating at 50Hz/60Hz, with a rated working voltage up to 690V and a rated current of up to 1250A. It is ideal for distributing power and safeguarding circuits and equipment from overloads, short-circuits, under-voltage, and other faults. Additionally, it supports infrequent circuit conversions and motor starts. This versatile breaker can be installed either vertically or horizontally, and is suitable for isolation, denoted by the symbol " ". The DAM2 MCCB adheres to the IEC60947-2 standard for low-voltage switchgear and control equipment, Part 2: circuit breakers.
1. Ambient air temperature: -5ºC to +40ºC, with an average daily temperature not exceeding +35ºC.
2. Altitude: Installation site altitude must not exceed 2000 meters.
3. Atmospheric conditions: At a maximum temperature of +40ºC, the relative humidity should not exceed 50%. Higher relative humidity levels are permissible at lower temperatures. The maximum average relative humidity is 90%, with a minimum average monthly temperature of +25ºC, accounting for temperature variations that may cause condensation on the product surface.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole types:
Type A: N-pole without over-current release components, remains connected continuously, and does not operate with the other three poles.
Type B: N-pole without over-current release components, operates in conjunction with the other three poles (N-pole activates prior to deactivation).
Type C: N-pole equipped with over-current release components, operates in conjunction with the other three poles (N-pole activates prior to deactivation).
Classified by rated current of over-current release:
DAM2-63 MCCB available in nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, 63 A.
DAM2-100 MCCB available in nine ratings: 16, 20, 25, 32, 40, 50, 63, 80, 100 A.
DAM2-250 MCCB available in seven ratings: 100, 125, 140, 160, 180, 200, 225, 250 A.
DAM2-400 MCCB available in five ratings: 225, 250, 315, 350, 400 A.
DAM2-630 MCCB available in three ratings: 400, 500, 630 A.
DAM2-800 MCCB available in three ratings: 630, 700, 800 A.
DAM2-1250 MCCB available in three ratings: 800, 1000, 1250 A.
Remark: The 6A version is limited to the electromagnetic (instantaneous) type and is not recommended due to specification limitations.
Wiring Options: Choose from front-of-board wiring, back-of-board wiring, or insertion type wiring for versatile installation.
Over-Current Release Patterns: Available in thermodynamic-electromagnetic (dual) type and electromagnetic (instantaneous) type, catering to diverse needs.
Outfit Options: Select between circuit breakers with outfit or without outfit to match your specific requirements.
Outfit Details: Inner accessories include shunt release, under-voltage release, auxiliary contact, and alarm contact. Outer accessories feature turning handle operation mechanisms and power-driven operation mechanisms, among others.
Breaking Capacity: Available in L-standard breaking type, M-second high breaking type, and H-high breaking type to suit various applications.
1. Instantaneous Action Characteristics: For distribution circuit breakers, setting value is 10In±20%, and for the DAM2-1250 model, it is 7In±20%. For motor protection circuit breakers, the setting value is 12In±20%.
2. Rated Values: Refer to Table 2 for the detailed rated values of our circuit breakers.
3. Ambient Temperature: At +40ºC, the over-current release action characteristics are shown in Table 3 for distribution circuit breakers and in Table 4 for motor protection circuit breakers.
Rated Value: Detailed specifications of the rated value of the circuit breaker.
| 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, the breaking index for all is equivalent to that of the M-type.
Inverse Time Breaking Action: Characteristics of over-current release for power distribution when all poles are powered 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 have a setting value of 10In±20%, while motor protection circuit breakers are set to 12In±20%.
Inverse Time Breaking Action: Characteristics of over-current release for motor protection when all poles are powered simultaneously.
| 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: Rated control supply voltage of AC50Hz, 230V, 400V; DC110V, 220V, 24V. Reliable circuit breaker operation within 70%~110% voltage range.
DC24V Shunt Release: Maximum length of copper wire must meet specified requirements for 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 above table specifications are not met, design the shunt release control circuit as per the provided figure.
1.2 Under-Voltage Release
Under-Voltage Operation: When supply voltage falls to 70%-35% of the rated voltage, the under-voltage release ensures reliable breaker operation.
Under-Voltage Protection: Below 35% of rated voltage, the under-voltage release prevents circuit breaker closure; above 85%, it ensures closure.
Closing Mechanism: The under-voltage release ensures circuit breaker closure at supply voltages above 85% of the rated value.
Under-Voltage Ratings: Rated at AC50Hz, 230V, 400V for reliable performance.
400V.
Special Note: Circuit breakers with under-voltage release only operate correctly at the rated voltage, ensuring safe 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 seamless performance within a range of 65% to 110% of Ue. Remarkably, once the control (Ctrl) is disengaged, the circuit breaker will initiate a delayed opening, ranging from 0.5 to 2 seconds, ensuring optimal 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 designed to remain inactive during normal operations of the circuit breaker. They will switch between normal open and normal closed states only upon free tripping or fault tripping, ensuring precise alerts only when necessary.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: The rated values and corresponding codes are 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: Post-tripping of the circuit breaker with an electric operating mechanism requires the mechanism to reset the circuit breaker before it can be closed again.
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 refers to a DAM2-type molded case circuit breaker. It features a frame rated current of 100A, standard breaking capacity, handle operation, 3 poles, double release, with shunt release, and is designed for motor protection with a rated current of 63A.
Selection, installation, and usage must comply with the product manual or relevant national standards to ensure optimal performance.
Note: The N-pole type of a 4P circuit breaker is categorized into A-type and B-type. If unspecified, the default is B-type.
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