| Customization: | Available |
|---|---|
| Breaking Capacity: | Low Voltage Circuit Breakers |
| Operation: | Manual Type |
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The DAM2 (CM1) series circuit breakers have a rated insulation voltage of 800V. They are tailored for AC distribution networks with a frequency of 50Hz/60Hz, a working voltage of up to 690V, and a rated current of 1250A. Ideal for distributing power and safeguarding circuits and electrical equipment from overloads, short-circuits, under-voltages, and other faults, these breakers are also suitable for the infrequent switching of circuits and the sporadic starting of motors. Whether mounted vertically or horizontally, the DAM2 series serves efficiently as an isolator, indicated by the symbol " ". These breakers fully comply with the IEC60947-2 standards for low-voltage switchgear and control equipment.
1. Ambient air temperature: -5ºC to +40ºC, with a 24-hour mean temperature not exceeding +35ºC.
2. Altitude: Installation sites should not exceed 2000 meters above sea level.
3. Atmospheric conditions: At a peak temperature of +40ºC, the relative humidity should not surpass 50%. Higher relative humidity is permissible at lower temperatures. The maximum average relative humidity is 90%, with a minimum monthly average temperature of +25ºC, accounting for possible surface condensation due to temperature variations.
4. Pollution Degree: 3.
Selection of instructions
The classification by pole types includes four variants:
Type A: N-pole without over-current release components, permanently connected, and does not operate with other three poles.
Type B: N-pole without over-current release components, operational with other three poles (N-pole activates prior to turning off).
Type C: N-pole fixed with over-current release components, operational with other three poles (N-pole activates prior to turning off).
Classification according to rated current of over-current release:
DAM2-63 MCCB offers nine current ratings: 6, 10, 16, 20, 25, 32, 40, 50, and 63 Amperes.
DAM2-100 MCCB provides nine current ratings: 16, 20, 25, 32, 40, 50, 63, 80, and 100 Amperes.
DAM2-250 MCCB offers seven current ratings: 100, 125, 140, 160, 180, 200, 225, and 250 Amperes.
DAM2-400 MCCB features five current ratings: 225, 250, 315, 350, and 400 Amperes.
DAM2-630 MCCB includes three current ratings: 400, 500, and 630 Amperes.
DAM2-800 MCCB offers three current ratings: 630, 700, and 800 Amperes.
DAM2-1250 MCCB provides three current ratings: 800, 1000, and 1250 Amperes.
Remark: Kindly note that the 6A variant is available only in the electromagnetic (instantaneous) type and is not a recommended specification.
According to the wiring method, we offer: front-of-board wiring, back-of-board wiring, and insertion type for the board.
According to the over-current release pattern, options include thermodynamic-electromagnetic (double) type and electromagnetic (instantaneous) type.
Regarding the outfit, two variations are available: with or without outfit.
The outfit encompasses both inner and outer accessories. Inner accessories include shunt release, under-voltage release, auxiliary contact, and alarm contact. Outer accessories feature a turning handle operation mechanism, a power-driven operation mechanism, and more.
Regarding breaking capacity, we offer: L-standard breaking type, M-second high breaking type, and H-high breaking type.
1. The instantaneous action characteristic setting value for distribution circuit breakers is 10In±20%, while for DAM2-1250 it is 7In±20%. For motor protection circuit breakers, the setting value is 12In ± 20%.
2. The rated value of the circuit breaker is detailed in Table 2.
3. At an ambient temperature of +40ºC, the over-current release action characteristics for distribution are shown in Table 3, while those for motor protection are shown in Table 4.
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: 2-pole and 4-pole circuit breakers, categorized into L, M, and H, share the same breaking index as the M-type.
Characteristics of inverse time breaking action of circuit breakers' over-current release for power distribution when all poles are powered on 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 |
The instantaneous action characteristic setting value for distribution circuit breakers is 10In±20%, while for motor protection circuit breakers it is 12In±20%.
Characteristics of inverse time breaking action of circuit breakers' over-current release for motor protection when all poles are powered on 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
Rated control supply voltage for the shunt release: AC50Hz: 230V, 400V; DC: 110V, 220V, 24V. The circuit breaker can reliably break when the voltage is between 70% and 110%.
When the rated control supply voltage for the shunt release is DC24V, the maximum length of copper wire should comply with 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 above requirements are not met, it is recommended to design the shunt release control circuit as shown in the following diagram:
1.2 Under-Voltage Release
When the supply voltage drops to 70% to 35% of the under-voltage release rated voltage, the under-voltage release circuit breaker will break reliably.
When the supply voltage falls below 35% of the rated voltage, the under-voltage release prevents the circuit breaker from closing.
When the supply voltage exceeds 85% of the rated voltage, the under-voltage release ensures that the circuit breaker can close. The under-voltage release is rated at AC50Hz, 230V, 400V.
When the supply voltage is above 85% of the rated voltage, the under-voltage release ensures the circuit breaker is closed. The under-voltage releases are rated at AC50Hz, 230V, 400V.
Special Note: The circuit breaker equipped with an under-voltage release can only open and close when the under-voltage is at its rated voltage.
Special Note: Circuit breakers with under-voltage release can only operate normally when the under-voltage is at its rated voltage.
normally.
1.3 Pre-Paid Meter Dedicated Release
The rated operating voltage (Ue) for the pre-paid meter dedicated release stands at AC230/50Hz, and performs effectively within a range of 65% to 110% Ue. Once the control (Ctrl) circuit is interrupted, the circuit breaker will delay its opening between 0.5 and 2 seconds.
Wiring Diagram for Pre-Paid Meter Dedicated Release
1.4 Rated Values for 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 remain inactive during normal operations of opening and closing. They switch between their normal states of opening and closing only after a free tripping event or fault tripping.
2. External Accessories for Circuit Breakers
2.1 Motor Operating Mechanism: The rated value and corresponding code 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 a circuit breaker with an electric operating mechanism trips, the mechanism must reset the breaker before it can close again.
Opening and Closing Principle Diagram for DAM2-63, 100, 225 Electric Operating Mechanism (AC)
Opening and Closing Principle Diagram for DAM2-400, 630, 800, 1250 Electric Operating Mechanism (AC)
2.2 Installation Dimensions for Manual Operating Mechanism (refer to Table 10)
Diagram for Handle Mounting Hole of DAM2-63~800
Total Height of Electric/Manual Operating Mechanism for 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 Guide 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 specifies a DAM2-type molded case circuit breaker with a frame rated current of 100A. It features standard breaking capacity, handle operation, 3 poles, double release, equipped with shunt release for motor protection, and a rated current of 63A.
Selection, installation, and use must comply with the product manual or relevant national standards.
Note: The N-pole type of a 4P circuit breaker is categorized into A-type and B-type. If unspecified, it defaults to B-type.
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