ASKB1Z
AISIKAI
| Quantity: | |
|---|---|
Type Desigation
ASK | B | 1 | Z | 63 | SD |
Company | Product code | Design Serial | Function derivation code | Frame Ratings | Attachment code |
| AISIKAI ELECTRIC | Miniature Circuit Breaker | 1: basic type | DC Miniature Circuit Breaker | 63: 63A frame 125: 125A frame | 3 |
| The ASKB1Z DC miniature circuit breaker is suitable for use in AC 50/60Hz circuits with a rated voltage of 230V to 1400V and a current of up to 63A, or in DC circuits with a rated voltage of 220V and a current of up to 63A. It provides overload and short-circuit protection. Under normal circumstances, it serves as a switching device for infrequent line operation. It can also be used as an isolating switch to disconnect lines for line and equipment maintenance. The circuit breaker is suitable for various applications, including industrial, commercial, high-rise, and residential buildings. |
I. By the over-current tripper rated current
Frame 63(A)： | 3, 6, 10, 16, 20, 25, 32, 40, 50, 63 |
Frame 125(A)： | 63, 80, 100, 125A |
63 Frame | ||
General power distribution protection | ||
No of Poles | `1P, 2P, 3P, 4P | |
Electrical Performance | ||
Functions | Short-circuit protection, overload protection, isolation, control | |
Rated frequency f | Hz | 50 |
Rated operational voltage Ue | V AC | 250 | 500 | 750 | 1000 |
Rated current In | A | 3, 6, 10, 16, 20, 25, 32, 40, 50, 63 |
Impulse withstand voltage Uimp | k V | 6 |
Instantaneous tripping type | C/D | |
Rated short-circuit capacity Icu | k A | Icu=6(L) |
Tripper type | Thermomagnetic | |
Service Life | Mechanical | 20000 |
Electrical | 8000 | |
Control & indication | ||
Optional accessories(multiple options available) | Alarm contact SD, auxiliary contact OF, | |
Connection & Installation | ||
Protection level | IP20 | |
Handle lock | None | |
Wiring Capacity | mm² | 1-25 |
Operational Temperature | ℃ | -5~40 |
Resistence to heat & humidity | 2 | |
Altitude | (m) | ≤2000 |
Air relative humidity | Not exceed 95% at +20℃; not exceed 50% at +40℃ | |
Pollution level | Ⅱ | |
Installation environment | Without strong impact and vibration | |
Installation category | Ⅲ | |
Installation method | DIN standard rail | |
| a | 18 / 36 / 54 / 72 |
b | 80±1.5/80±1.5/80±1.5/80±1.5 | |
c | 76 /72±1.5/72±1.5/72±1.5 |
125 Frame | ||
General power distribution protection | ||
No of Poles | 1P / 2P / 3P / 4P | |
Electrical Performance | ||
Functions | Short-circuit protection, overload protection, isolation, control | |
Rated frequency f | Hz | 50 |
Rated operational voltage Ue | V AC | 250 | 500 | 750 | 1000 |
Rated current In | A | 63,80,100,125 |
Impulse withstand voltage Uimp | k V | 10 |
Instantaneous tripping type | C/D | |
Rated short-circuit capacity Icu | k A | Icu=6(L) |
Tripper type | Thermomagnetic | |
Service Life | Mechanical | 20000 |
Electrical | 8000 |
Control & indication | ||
Optional accessories(multiple options available) | Alarm contact SD, auxiliary contact OF, | |
Connection & Installation | ||
Protection level | IP20 | |
Handle lock | None | |
Wiring Capacity | mm² | 1~25 |
Operational Temperature | ℃ | -5~40 |
Resistence to heat & humidity | 2 | |
Altitude | (m) | ≤2000 |
Air relative humidity | Not exceed 95% at +20℃; not exceed 50% at +40℃ | |
Pollution level | Ⅱ | |
Installation environment | Without strong impact and vibration | |
Installation category | Ⅲ | |
Installation method | DIN standard rail | |
| a | 27 / 54 / 81 / 108 |
b | 80.5 / 80.5 / 80.5 / 80.5 | |
c | 73.5 / 78.5 / 78.5 / 78.5 |
General Operation & Installation Methods
Category | Requirement |
Operational Temperature | Between -5℃ and +40℃. |
Altitude | Lower than 2000 meters. |
Operational humidity | The relative humidity at +40℃ shall not exceed 50%. Higher relative humidity is allowed at lower temperature. The average maximum relative humidity is 90% in the most humid month |
Installation level | The installation level is Ⅱ,Ⅲ. |
Pollution level | Level 2 |
Installation method | Install vertically or horizontally. Use YH35-7.5 standard DIN rail |
Installation conditions | The inclination of the mounting surface to the vertical surface does not exceed 5 degrees. Use environment should be without strong impact and |
Wiring method | Fasten the wires using screws. |
Wire inlet method | Wiring reversely is acceptable for normal type. |
Main Parameters and Technical Performance
Rated current (In): 1A, 3A, 6A, 10A, 16A, 20A, 25A, 32A 40A, 50A, 63A, 80A, 100A, 125A
Number of poles:
a. Single-pole;
b. Two-pole
By instantaneous tripping type:
a. Type C (5-10in);
b. Type D (10-16in). Rated operating short-circuit breaking capacity;
Mechanical and electrical lifespan:
a. Electrical lifespan: not less than 4,000 cycles;
b. Mechanical lifespan: not less than 10,000 cycles.
Optionanal Accessories
1. OF auxiliary contacts
Indicate the circuit breaker's on/off status.
Installed on the left side of a miniature circuit breaker.
Note: A maximum of two OF contacts or one OF contact and one SD contact can be connected to the left side of the switch.
2. SD alarm contact
Mainly used to indicate the overcurrent trip status of a circuit breaker. Installed on the left side of a miniature circuit breaker.
Note: A maximum of two OF contacts or one OF contact plus one SD contact can be connected to the left side of the switch.
3.MX shunt release + OF auxiliary contacts
Can be used for remote tripping of circuit breakers:
Installed to the right side of a miniature circuit breaker.
Note: A maximum of one MX or one MV + MN can be connected to the right side of the switch.
4.MV+MN overvoltage/undervoltage release
Used to detect when the power supply voltage drops below the protective trip level and instantly trip the circuit breaker. See the data sheet for details on the trip level.
Attached to the right side of the miniature circuit breaker.
Note: A maximum of one MX or one MV+MN release can be connected to the right side of the switch.
FAQ
1. What Are the Key Components Inside an MCB?
An MCB consists of:
-Bimetallic Strip: Responds to prolonged overcurrent (thermal tripping).
-Solenoid (Electromagnet): Reacts to sudden high current (short-circuit tripping).
-Arc Chute: Extinguishes arcs during tripping to prevent damage.
-Operating Mechanism: Manual switch lever with spring-loaded contacts.
-Terminals: For connecting incoming/outgoing wires.
2. What is the difference between DC MCBs and standard (AC) MCBs?
-Standard (AC) MCBs: Designed for alternating current (AC) circuits (e.g., 220V/380V AC) in residential, commercial, and industrial power systems.
-DC MCBs: Specifically designed for direct current (DC) circuits, used in solar PV systems, EV charging stations, battery storage systems (e.g., 12V/24V/48V DC).
3. Can MCBs Be Used in DC Circuits?
-Standard MCBs: Designed for AC; DC use requires special models (DC MCBs).
-DC Ratings: Check manufacturer specs (e.g., 24V/48V DC systems in solar panels).
-Arc Extinction: DC arcs are harder to interrupt, needing higher breaking capacity.
4.Why do DC circuits require specialized MCBs?
-Arc Extinguishing Difficulty: DC lacks a natural current zero-crossing, making arc suppression harder (requires stronger arc chutes).
-Polarity Sensitivity: DC MCBs must be wired with correct polarity (+/-) to ensure proper tripping.
-Faster Short-Circuit Current Rise: DC faults can escalate rapidly, requiring faster electromagnetic tripping.
5. How to Choose an MCB for Solar PV Systems?
-DC-Specific MCB: Rated for PV voltage (e.g., 600V DC).
-Polarity: Some DC MCBs require correct +/- terminal connections.
-UV Exposure: Use outdoor-rated enclosures if installed in sunlight.
6. How to Prevent MCBs from Tripping Due to Voltage Fluctuations?
-Use Voltage-Independent MCBs: Thermal-magnetic types are less sensitive to voltage swings.
-Stabilizers/AVRs: Install for sensitive equipment (e.g., medical devices).
-Note: MCBs protect against overcurrent, not over/under-voltage (use a voltage relay for that).
7. What Are the Safety Precautions When Handling MCBs?
-De-Energize Circuits: Turn off the main switch before installation/maintenance.
-Torque Specifications: Tighten terminals to manufacturer’s recommended torque.
-Avoid DIY Repairs: Never disassemble an MCB—replace faulty units.
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