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Normal Operating and Installation Conditions
Product Features
- The contact system is installed in the insulation part compartment. Each phase contact system adopts a multi-path sheet-like structure, realizing electric force compensation and ensuring the high breaking capacity of the circuit breaker.
- The advanced arc-extinguishing system and protective cover ensure "zero flying arc", making the product safer.
- The circuit breaker is operated by an energy-storage mechanism for energy storage, with a fast closing speed.
- The operating mechanism is installed in the center of the front of the circuit breaker, completely separated from the main circuit. It ensures stable and consistent final contact pressure per phase, which is critical for temperature rise and breaking indicators.
- The centered operating mechanism is convenient for symmetrical hole-opening in the center of the cabinet door of the complete set, improving the appearance quality of the complete set of cabinets.
- Supports bottom incoming lines, with both horizontal and vertical wiring methods available.
- Intelligent controller with multiple protection functions, enabling selective protection.
Model and Description
| ATA | 2000 | / | 2000A | / | 3P | / | Intelligent Controller Model M | / | Operating Voltage of the Intelligent Circuit: AC380V, AC220V, DC220V, DC110V |
| 1900A | |||||||||
| 1600A | |||||||||
| 1250A | |||||||||
| 1000A | |||||||||
| 800A |
| Breaker Model | ATA2000 | ||||
| Frame-rated Current Irem (A) | 2000 | ||||
| Rated Operating Current In (A) | 800 | 1000, 1250, 1600 | 1900, 2000 | ||
| Rated Operating Voltage Ue (V) | AC230, AC400, AC690 | ||||
| Rated Frequency Hz | 50/60Hz | ||||
| Rated Insulation Voltage Ui (V) | 1000 | ||||
| Rated Impulse Withstand Voltage Uimp (kV) | 12 | ||||
| Number of Poles (P) | 3 | ||||
| Total Breaking Time (ms) | ≤30 | ||||
| Closing Time (ms) | ≤60 | ||||
| Rated Ultimate Short-Circuit Breaking Capacity Icu (kA) (RMS) | AC230V | 65 | |||
| AC400V | 50 | ||||
| AC690V | 40 | ||||
| Rated Service Short-Circuit Breaking Capacity Ics (kA) (RMS) | AC230V | 65 | |||
| AC400V | 50 | ||||
| AC690V | 40 | ||||
| Rated Short-Time Withstand Current Icw(1s) (kA) (RMS) | AC230V | 65 | |||
| AC400V | 50 | ||||
| AC690V | 40 | ||||
| Operating Performance (Times) | Electrical Life | AC230V, AC400V | 10000 | ||
| AC690V | 5000 | ||||
| Mechanical Life | Maintenance-free | 10000 | |||
| Maintenance-Required | 20000 | ||||
| Installation Type | Fixed Type | ||||
| Main Circuit Wiring Method | Fixed Type | Horizontal Wiring, Vertical Wiring | |||
| Overall Dimensions: W×H×D mm | 362×402×355 | ||||
| Weight (kg) | 41.5 | 43 | 45 | ||
Product Structure
The circuit breaker has a compact structure, small volume, and features three-dimensional separation. The contact system is enclosed in an insulated base and bottom plate with a partition structure. Each phase contact is separated to form individual small chambers. The intelligent controller, operating mechanism, handle, and motor operating mechanism are arranged in sequence in front of it to form independent units.
1. Fixed-type Circuit Breaker
The fixed-type circuit breaker consists of the circuit breaker body and fixed installation side plates. The fixed installation side plates are used to install and fix the relative position of the circuit breaker in the switch cabinet.
2. Structure Diagram of Fixed-type Circuit Breaker:
Intelligent Controller
Power Supply Conditions for Normal Operation of the Intelligent Controller:
The working power of the intelligent controller is supplied by current transformers and an auxiliary power supply. To ensure reliable operation at small currents and reliable breaking in case of faults, a dual-power simultaneous supply method is adopted, as follows:
1. Circuit Breaker CT Power Supply
Power is supplied through the current transformer (CT) inside the circuit breaker. The normal working conditions of the controller are as follows:
For the M-type controller (2000A frame circuit breaker): When the rated current In of the circuit breaker is greater than 400A, the single-phase primary current of the main circuit is not less than 0.8In, and the three-phase primary current is not less than 0.4In; when In = 400A, the single-phase primary current is not less than 1.0In, and the three-phase primary current is not less than 0.6In.
2. Auxiliary Power Supply
Terminals 1 and 2 of the controller are for the auxiliary power supply. The normal working condition of the controller is (85% - 110%) Ue. AC or DC power supply voltages: AC230V, AC400V, DC220V, DC110V. When connecting the power supply, connect to the power supply suitable for the controller.
When using functions such as ground protection, communication, thermal memory, or requiring the circuit breaker to maintain input and output signals in the open state, an auxiliary power supply must be equipped.
3. Panel Power Supply
For the M-type controller, power can also be connected through the DC24V power terminal on the panel. It is used when there is no power in the grid or during no-load operation, and the controller has no power supply, to check the controller (normal status, parameters, etc.). Voltage at the test port: DC24V ± 5%.
Basic Functions
Overload Long-delay Protection Characteristics
| Model | Setting Current Ir1 Adjustment Range | Operating Time TL Accuracy ±15% | ||||||
|---|---|---|---|---|---|---|---|---|
| M |
(0.4~1.0)In + OFF Type L (adjusted incrementally as 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0); Type M (adjusted incrementally at 5%) |
≤1.05Ir1 | >2h Not operate | |||||
| >1.3Ir1 | <1h Operate | |||||||
| Setting Value (tL) | 15s | 30s | 60s | 120s | 240s | 480s | ||
| 1.5Ir1 | 15s | 30s | 60s | 120s | 240s | 480s | ||
| 2.0Ir1 | 8.4s | 16.9s | 33.8s | 67.5s | 135s | 270s | ||
| 7.2Ir1 | 0.65s | 1.3s | 2.6s | 5.2s | 10s | 21s | ||
| Note: The operating time TL satisfies: TL=(1.5 Ir1)² tL/I² | ||||||||
| Thermal Memory Function (30min + OFF, can be cleared by power failure) | Standard + OFF (Shut-off) | |||||||
Characteristic Curves
Curve 1 to Curve 6:
- (1) Standard Inverse Time-Limit (SI)
- (2) Very Inverse Time-Limit (VI)
- (3) Extremely Inverse Time-Limit (Distribution Protection) (EI (G))
- (4) Extremely Inverse Time-Limit (Motor Protection) (EI (M))
- (5) High-Voltage Fuse Compatibility (HV)
- (6) I²t Curve
Short-circuit Short-delay Protection Characteristics (M Intelligent Controller)
| Setting Current Ir2 Adjustment Range | Operating Time Ts | ||
|
□1.5~10□Ir1+OFF Current Accuracy: ±10% |
Inverse Time-Limit | Same as overload long-delay, but curve speed is 10 times faster. Accuracy: 15% | |
| Definite Time-Limit | Setting Time ts | 0.1s~0.4s (0.1 step) | |
| Accuracy | ±10% (Inherent 40ms) | ||
| Thermal Memory Function (30min, can be cleared by power failure) | Standard + OFF (Shut-off) | ||
Short-circuit Instantaneous Protection Characteristics
| Model | Ir3 | Accuracy |
|---|---|---|
| M | 2In~50kA+OFF | Current Accuracy: ±15% |
Frequently Asked Questions (FAQ)
A1: The ambient air temperature must not exceed +55°C as the upper limit, and must not be lower than -5°C as the lower limit.
A2: The total breaking time is less than or equal to 30ms (≤30ms), and the closing time is less than or equal to 60ms (≤60ms).
A3: Yes, the fixed-type circuit breaker supports both horizontal and vertical main circuit wiring methods, and can also be installed with bottom incoming lines.
A4: The installation protection class requirements are IP30, and IP40 when installed in the cabinet compartment with additional door frames and organic glass covers.
A5: An auxiliary power supply is required when utilizing functions such as ground protection, communication, thermal memory, or when the circuit breaker needs to maintain input and output signals in the open state.
A6: For electrical life, it reaches 10,000 cycles (AC230V/AC400V) or 5,000 cycles (AC690V). For mechanical life, it offers 10,000 maintenance-free operations and up to 20,000 operations when regular maintenance is performed.