| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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The DAM2 (CM1) series boasts a rated insulation voltage of 800V, making it suitable for AC distribution networks operating at 50Hz / 60Hz, with a working voltage of up to 690V and a rated current of 1250A. It excels in power distribution and protection, safeguarding circuits and equipment from overloads, short-circuits, undervoltages, and other electrical faults. Additionally, it supports infrequent circuit switching and motor start-ups. The DAM2 MCCB can be installed in both vertical (upright) and horizontal (transverse) orientations, and is suitable for isolation with the symbol ''. Conforming to IEC60947-2 standards, it stands as a reliable choice for low-voltage switchgear and control equipment.
1. Ambient air temperature: -5ºC~+40ºC, with a 24-hour average temperature not exceeding +35ºC.
2. Altitude: Installation sites should not exceed an altitude of 2000m.
3. Atmospheric conditions: At +40ºC, the maximum relative humidity should not exceed 50%. Lower temperatures may permit higher relative humidity levels. The peak average relative humidity is 90%, with an average monthly minimum temperature of +25ºC, taking into account temperature-induced surface condensation.
4. Pollution Degree: 3.
Selection of instructions
Classified by pole type, the DAM2 series includes four variants:
Type A: N-pole without over-current release components, constantly connected, independent of other poles during on/off operations.
Type B: N-pole without over-current release components, coordinated with other poles (N-pole engages prior to disconnection).
Type C: N-pole with fixed over-current release components, coordinated with other poles (N-pole engages prior to disconnection).
Classified by rated current of over-current release:
DAM2-63 MCCB offers nine ratings: 6, 10, 16, 20, 25, 32, 40, 50, 63 A.
DAM2-100 MCCB offers nine ratings: 16, 20, 25, 32, 40, 50, 63, 80, 100 A.
DAM2-250 MCCB offers seven ratings: 100, 125, 140, 160, 180, 200, 225, 250 A.
DAM2-400 MCCB offers five ratings: 225, 250, 315, 350, 400 A.
DAM2-630 MCCB offers three ratings: 400, 500, 630 A.
DAM2-800 MCCB offers three ratings: 630, 700, 800 A.
DAM2-1250 MCCB offers three ratings: 800, 1000, 1250 A.
Remark: 6A only has electromagnetic (instantaneous) type, is not recommended specifications.
According to the wiring method: wiring in front of board, wiring on back of board, insertion type of the board.
According to over-current release pattern: thermodynamic-electromagnetic (double) type, electromagnetic (instantaneous) type.
According to the outfit, it has two types: with or without outfit.
The outfit include inner accessories and outside accessories: The inner accessories have shunt release, under-voltage release, auxiliary contact and alarm contact. The outside accessories are turning handle operation mechanism, power-driven operation mechanism and so on.
According to the breaking capacity: L-standard breaking type; M-second high breaking type; H-high breaking type
1, Instantaneous action characteristic setting value of the circuit breaker for distribution is 10In±20%, DAM2-1250 is 7In±20%; Instantaneous action characteristic set value of the circuit breaker for motor protection is 12In ± 20%.
2, The rated value of the circuit breaker in Table 2.
3, In the ambient temperature of +40ºC, the circuit breaker for distribution over-current release action characteristics shown in Table 3, the circuit breaker for motor protection over-current release action characteristics shown in Table 4.
Rated value of the circuit break
| 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: 2-poles, 4-poles circuit breakers, divided into L, M, H, they have the same breaking index as M-type.
Characteristics of inverse time breaking action of circuit breakers over-current release for power distribution when every pole is power-on at the same time
| 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 characteristic setting value of the circuit breaker for distribution is 10In±20%, and instantaneous action characteristic setting value of the circuit breaker for motor protection is 12In±20%.
Characteristics of inverse time breaking action of circuit breakers over-current release for motor protection when every pole is power-on at the same time
| 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 accessory of circuit breakers
1.1 Shunt release
Rated control supply voltage of the shunt release: AC50Hz, 230V, 400; DC110V, 220V, 24V; When between 70%~110%, can break the circuit breaker reliably.<
When rated control supply voltage of the shunt release is DC24V, the maximum length of copper wire should meet the following requirements
| Rated control supply voltage Uc(DC24V)/Conductor area |
1.5mm² | 2.5mm² |
| 100%Uc 85%Uc |
150m 100m |
250m 160m |
If the requirements of the above table are not met, it is recommended to design the shunt release control circuit using the following figure
1.2 Under-voltage release
When the power supply voltage drops to under-voltage release rated voltage of 70% to 35% of the range, the under-voltage
release circuit breaker reliable break; when the supply voltage is below the rated voltage undervoltage release 35% , Under-voltage
release to prevent the circuit breaker is closed; when the supply voltage is higher than 85% of the rated voltage of the under-voltage
release, the under-voltage release ensures that the circuit breaker is closed. The undervoltage releases are rated at AC50Hz, 230V,
400V.
Special Note: The circuit breaker with undervoltage release, only in the under-voltage with rated voltage, which can open and close
normally.
1.3 Pre-paid meter dedicated release
The rated operating voltage Ue of the pre-paid meter dedicated release is AC230/50Hz. It operates seamlessly within a range of (65% ~ 110%) Ue. Upon Ctrl disconnection, the circuit breaker will delay 0.5s ~ 2s before opening.
Wiring Diagram for Pre-paid Meter Dedicated Release
1.4: The Rated Values of Auxiliary Contacts and Alarm Contacts as Indicated in 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 do not engage during normal opening and closing of the circuit breaker. They switch between normally open and normally closed states only after free tripping or fault tripping.
2. External Accessories for Circuit Breakers
2.1: Motor Operating Mechanism - Rated Values and Codes as Listed 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, if the circuit breaker is equipped with an electric operating mechanism, it must reset the buckle before closing again.
Principle Diagram: Opening and Closing of DAM2-63,100,225 Electric Operating Mechanism (AC)
Principle Diagram: Opening and Closing of DAM2-400,630,800,1250 Electric Operating Mechanism (AC)
2.2: Installation Dimensions for Manual Operating Mechanism as Shown in Table 10
Diagram: Handle Mounting Hole for DAM2-63~800
Overall Height of Electric/Manual Operating Mechanism for Circuit Breakers (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 Breaker
| 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. Frame rated current is 100A, standard breaking capacity, handle operation, 3 poles, double release, includes shunt release, motor protection, rated current of 63A.
Selection, installation, and usage must comply with the product manual or relevant national standards.
Note: N-pole type of 4P circuit breaker is categorized into A-type, B-type; default is B-type if unspecified.
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