ASKW3Z-G
AISIKAI
IEC60947-3
| Quantity: | |
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Technical Data
| Model | ASKW3Z-G | ||||
Frame Current Inm(A) | 2500 | 4000 | |||
Standard | IEC/EN 60947-1、IEC/EN 60947-3 | ||||
Number of poles | 3P, 4P | ||||
| Full breaking time/closing time | ≤30ms/≤70ms | ||||
Rated working current In(A) | 630A-2500A | 1000A-4000A | |||
Rated impulse withstand voltage Uimp (KV) | 18 | ||||
| Rated working voltage Ue(V) | DC750V、DC1000V、DC1500V | ||||
Rated short-circuit breaking capacity Icm (KA)(Peak) | DC100V | 50 | 100 | ||
| DC1500V | 50 | 100 | |||
Rated short-time withstand current Icw (KA)(1s)(Effetive) | DC1000V | 50 | 100 | ||
DC1500V | 50 | 100 | |||
| Application Category | DC-22A、DC-23A、DC-PV2 | ||||
Auxiliary contact | 4-open and 4-close combination contacts 4-open and 4-close independent contacts 6-open and 6-close combination contacts | ||||
Copper busbar wiring method | 3P:A Type, B Type 4P:C Type, D Type | ||||
Installation | Fixed Type, Drowout Type | ||||
Operation performance (number of times) | Electrical life | DC1000V | 3000 | 1000 | |
| DC1500 | 2000 | 800 | |||
| Mechanical life | Maintenance | 1500 | 1000 | ||
| Maintenance-free | 2500 | 1500 | |||
Power consumption (ambient temperature +40°C)
| Model | Power consumption(W) | |
| Fixed Type | Drowout Type | |
| ASKW3Z-G(2500A) | 240 | 360 |
| ASKW3Z-G(4000A) | 600 | 800 |
Wiring Method
| A-type wiring: suitable for 3-pole series connection | B-type wiring: suitable for 3-pole series connection | C-type wiring: suitable for 4-pole series connection | D-type wiring: suitable for 4-pole series connection |
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Different power system/load wiring methods applicable to DC isolation switches
| Rated Working Voltage | Power System/Load Wiring Methods | ||
| Ungrounded system | Negative grounded system | Center point grounded system | |
| DC750V | C | A | B |
| DC1000V-DC1500V | C | D | C |
FAQ
DC Disconnect Switch (Isolator):
Used for electrical isolation during maintenance to ensure complete de-eningization.
No (or minimal) arc-extinguishing capability—only suitable for breaking no-load or negligible currents.
Vacuum Circuit Breaker (VCB):
Designed for switching and protection, capable of interrupting normal and fault currents (e.g., short circuits).
Equipped with advanced arc quenching (vacuum interrupter) and protective functions (overcurrent, short-circuit protection).
Disconnect Switch:
Typically no arc-extinguishing ability (or very limited). Never operate under load!
Vacuum Circuit Breaker:
Uses a vacuum interrupter to quickly extinguish high-current arcs, making it suitable for frequent load switching.
Disconnect Switch:
Simple design, visible contacts (clear isolation gap), mechanical interlocks to prevent misuse.
Vacuum Circuit Breaker:
More complex, with sealed vacuum interrupters and spring-operated mechanisms.
Contacts are not visible—status is indicated via position indicators.
Disconnect Switch:
Provides safe isolation in DC systems (e.g., solar PV, traction power).
Must be used after a breaker opens (never break load current alone).
Vacuum Circuit Breaker:
Used for frequent switching & protection (e.g., DC microgrids, battery storage, railways).
Can directly interrupt fault currents to protect downstream equipment.
Disconnect Switch: Installed upstream of the breaker for maintenance isolation.
Vacuum Circuit Breaker: Installed near the load as the primary protection device.
Disconnect Switch:
Never open under load—always confirm the breaker is off first!
Vacuum Circuit Breaker:
Regular maintenance (check vacuum integrity, contact wear).
AISIKAI supplied 18 SKT1 160A automatic transfer switches in a centralized multi-circuit ATS cabinet for an 18-villa residential project in Saint Martin.
Project Upgrade in Peru: The customer replaced a disorganized and unstable electrical setup with the AISIKAI Electric adjustable MCCB solution, achieving cleaner wiring, more reliable protection, and improved system stability.
The Electronic MCCB with Built-in Electric Motorized Operating Mechanism solves the long-term reliability problems of traditional external motorized mechanisms, providing a more stable transmission.
The Load Isolation Switches (load disconnector) in this project provide visible isolation for maintenance, ensuring safe disconnection of the 5kV circuits during inspections and repairs to protect personnel and equipment.
