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- NS630NA
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- 255 x 140 x 110 mm
- 5.2 kg
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Product Overview
The Schneider Electric NS630NA is a three-pole, 630 A low-voltage switching and isolation device from the Compact NS series, originally associated with the Merlin Gerin product range. It is designed for industrial electrical distribution systems that require reliable manual switching and circuit isolation.
Although it is frequently listed under the general category of circuit breakers, the NS630NA is specifically a non-automatic switch-disconnector. The NA designation indicates that it does not provide automatic overcurrent protection. It is intended to open, close, and isolate electrical circuits under suitable operating conditions, while separate upstream protective equipment provides overload and short-circuit protection.
With a rated current of 630 A and a three-pole configuration, the NS630NA can be used in industrial power distribution installations, electrical control panels, and equipment isolation arrangements. Its robust molded-case construction supports installation in demanding electrical environments where dependable switching and isolation are important.
The device is suitable for applications requiring manual control of a power distribution circuit. Before installation, engineers should verify the system voltage, current rating, utilization category, short-time withstand requirements, and coordination with upstream protective devices.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Schneider Electric |
| Product Family | Compact NS |
| Model | NS630NA |
| Product Type | Non-Automatic Switch-Disconnector |
| Product Category | Molded-Case Switching Device |
| Rated Current | 630 A |
| Number of Poles | 3 Poles |
| Rated Operational Voltage | Up to 690 V AC |
| Rated Insulation Voltage | 750 V |
| Rated Impulse Withstand Voltage | 8 kV |
| Rated Frequency | 50/60 Hz |
| Protection Function | Non-automatic; no overcurrent protection |
| Switching Function | Manual circuit switching and isolation |
| Utilization Category | Depends on the applicable AC/DC operating conditions |
| Mounting Type | Industrial panel installation |
| Dimensions | 255 × 140 × 110 mm |
| Weight | 5.2 kg |
| Product Range | Schneider Compact NS |
Important: The NS630NA is a non-automatic switch-disconnector. It must be coordinated with suitable upstream overcurrent protection. Confirm the exact electrical ratings and connection configuration against the device nameplate and applicable technical documentation.
Function and Working Principle
The Schneider NS630NA provides manual switching and isolation of electrical circuits. Unlike an automatic circuit breaker equipped with an overcurrent trip unit, this device does not independently detect and interrupt overload or short-circuit conditions.
1. Manual Circuit Switching
The NS630NA allows an operator to open or close a three-phase electrical circuit through its operating mechanism.
In industrial distribution systems, this function is useful when electrical equipment needs to be connected or disconnected during normal operation or maintenance procedures.
The switching operation must remain within the device’s rated operating conditions and applicable utilization category.
2. Electrical Isolation
One of the main purposes of the NS630NA is to provide a means of isolating an electrical circuit.
When the device is placed in the appropriate open position, it disconnects the associated circuit from its incoming electrical supply. This helps maintenance personnel establish an isolation point before carrying out authorized work.
Electrical isolation must always be verified using suitable procedures and instruments. Operating the switch alone should not replace lockout/tagout procedures or the verification of absence of voltage.
3. Three-Pole Switching
The NS630NA uses a three-pole configuration for switching three-phase electrical circuits.
All three phases are controlled through the device’s operating mechanism. This arrangement is commonly used in industrial distribution systems supplying motors, production equipment, and electrical panels.
Correct phase connections and conductor sizing are essential for safe operation.
4. Coordination with Protective Devices
The NS630NA does not provide automatic overload or short-circuit protection.
For this reason, it must be installed as part of a properly coordinated electrical distribution system. Suitable upstream fuses or circuit breakers should provide the necessary fault protection.
Engineers must verify the protective-device ratings, available fault current, conductor capacity, and coordination requirements before commissioning.
5. Electrical Distribution Management
In larger industrial installations, switch-disconnectors help operators manage the distribution of electrical power between incoming supplies and individual equipment sections.
The NS630NA can serve as a manual switching and isolation point in such arrangements, provided its ratings and application conditions are appropriate.
Role in Industrial Electrical Systems
The Schneider NS630NA is generally used as part of a low-voltage power distribution arrangement. Its function is different from that of an automatic protective circuit breaker, and its application should be planned accordingly.
Main Distribution Panels
The device can be installed in an industrial distribution panel where a 630 A switching and isolation point is required.
It may be used to disconnect a distribution section during maintenance or equipment replacement.
Motor Control Centers
Motor control centers distribute electrical power to multiple motor feeders and control circuits.
A suitable switch-disconnector can provide an isolation point for a distribution section or associated equipment. Motor overload and short-circuit protection must be provided separately.
Industrial Machinery
Large production machines often contain multiple electrical subsystems, including motors, pumps, fans, and auxiliary equipment.
The NS630NA may be incorporated into the electrical distribution arrangement to support manual switching and isolation of an appropriate circuit.
Power Distribution Systems
Industrial facilities frequently use distribution panels to divide incoming electrical power among different production areas.
A 630 A non-automatic switch-disconnector can serve as a switching component within such a system when properly coordinated with upstream protection.
Industrial Applications
1. Manufacturing Facilities
Manufacturing plants require reliable electrical distribution to supply production machinery, control cabinets, and auxiliary equipment.
The NS630NA can provide a manual switching and isolation point for a suitably rated distribution circuit.
2. Industrial Power Distribution Panels
Electrical distribution panels often contain switching devices, protective equipment, busbars, and monitoring components.
The NS630NA can be incorporated into a panel where manual switching and isolation are required for a 630 A three-phase circuit.
3. Motor Control Centers
Motor control centers organize the power supply and control of multiple industrial motors.
The NS630NA may be used for appropriate feeder isolation or distribution switching, while motor overload and short-circuit protection are handled by separate protective equipment.
4. Pumping Stations
Industrial pumping stations contain electrical systems that supply pumps, auxiliary motors, and supporting equipment.
A correctly rated switch-disconnector can help maintenance personnel isolate a distribution section before performing authorized servicing.
5. Water Treatment Plants
Water treatment facilities use pumps, blowers, mixers, and other electrically powered machinery.
The NS630NA can be considered for power distribution and isolation applications where its voltage, current, and switching ratings meet the installation requirements.
6. Commercial and Industrial Buildings
Large buildings require electrical distribution equipment to manage power supplied to HVAC systems, mechanical equipment, and other major loads.
A 630 A switching device may be used in suitable distribution assemblies to support manual isolation and electrical system maintenance.
Installation and System Integration
Correct installation is essential for safe operation and reliable electrical performance.
1. Verify Electrical Ratings
Before installation, confirm that the NS630NA is suitable for the electrical system.
Important parameters include:
- Rated operational voltage.
- Rated current of 630 A.
- Three-pole configuration.
- Available short-circuit current.
- Required switching utilization category.
- Upstream protective-device coordination.
The system voltage and fault conditions must remain within the device’s documented limits.
2. Panel Mounting
The supplied dimensions are 255 × 140 × 110 mm, with a weight of approximately 5.2 kg.
Before designing the electrical cabinet, verify the mounting arrangement, terminal access, operating clearance, and connection requirements.
Adequate space should be provided for power cables, busbar connections, inspection, and maintenance.
3. Electrical Connections
Power connections must use conductors and terminals appropriate for the rated current and installation conditions.
Check the following during installation:
- Correct phase identification.
- Proper conductor cross-section.
- Secure terminal connections.
- Appropriate connection accessories.
- Correct tightening torque.
- Reliable protective grounding arrangements.
Loose or incorrectly sized connections can lead to overheating and electrical failure.
4. Upstream Protection Coordination
Since the NS630NA does not provide automatic overcurrent protection, suitable upstream protective equipment is essential.
The protective arrangement must be selected according to the available fault current, conductor ratings, and electrical system design.
Do not assume that the NS630NA can replace an automatic circuit breaker with an overload or short-circuit trip unit.
5. Commissioning and Testing
Before energizing the installation, inspect the device and its associated electrical connections.
Commissioning checks should include:
- Mechanical operating condition.
- Correct open and closed positions.
- Phase connection verification.
- Terminal connection inspection.
- Upstream protection coordination.
- Electrical isolation verification.
Testing should be carried out by qualified personnel following the applicable safety procedures.
Compatible System Components
The NS630NA is generally installed alongside other low-voltage electrical distribution components.
| Component | Function | Integration Considerations |
|---|---|---|
| Upstream circuit breaker | Provides automatic fault protection | Must be coordinated with the NS630NA and installation |
| Protective fuses | Provide overload and short-circuit protection where appropriately selected | Verify fuse type, current rating, and fault-breaking capacity |
| Electrical busbars | Distribute electrical power | Confirm current capacity and connection compatibility |
| Distribution cabinet | Houses electrical switching equipment | Provide adequate mounting space and ventilation |
| Three-phase power cables | Carry electrical current | Select suitable conductor size and insulation rating |
| Current transformers | Measure electrical current | Select according to system current and monitoring requirements |
| Power meters | Monitor electrical consumption | Coordinate measurement connections and instrument ratings |
| Auxiliary contacts | Provide switching status signals when compatible accessories are installed | Verify accessory compatibility with the exact device |
| Control and monitoring equipment | Supports system-level supervision | Confirm the required interface and accessory configuration |
The components listed above are typical elements of an industrial electrical distribution system. They are not necessarily included with the NS630NA.
Alternative Models and Replacement Considerations
When replacing the NS630NA, the most important consideration is whether the alternative provides the same non-automatic switching and isolation function.
| Alternative Product | Replacement Considerations |
|---|---|
| Schneider Compact NS630NA | Direct model replacement, subject to exact configuration and condition verification |
| Schneider Compact NS630b NA | Related non-automatic switch-disconnector family; verify dimensions and connection configuration |
| Schneider Compact NS630 circuit breaker | Not automatically equivalent; confirm whether automatic overcurrent protection is required |
| Schneider ComPacT NSX630NA | Different product family; check electrical ratings, installation dimensions, and application suitability |
| Other 630 A switch-disconnectors | Compare pole configuration, operational voltage, utilization category, and isolation requirements |
Before selecting a replacement, compare:
- Rated operational current.
- Rated operational voltage.
- Number of poles.
- Switching and isolation function.
- Short-time withstand capability.
- Connection and mounting arrangement.
- Dimensions and terminal configuration.
- Upstream protection coordination.
- Required accessories and auxiliary contacts.
A standard automatic circuit breaker is not necessarily a direct substitute for the NS630NA. The replacement must satisfy the original switching function and the electrical system’s protection requirements.
Key Advantages
630 A Current Rating
The NS630NA is designed for electrical distribution applications requiring a rated current of up to 630 A under specified operating conditions.
Three-Pole Configuration
Its three-pole arrangement supports manual switching of three-phase electrical circuits.
Manual Switching and Isolation
The device provides a practical means of disconnecting and isolating electrical distribution circuits for maintenance and operational purposes.
Industrial Molded-Case Construction
The Compact NS design is intended for industrial low-voltage distribution applications.
Integration into Distribution Panels
Its form factor and electrical configuration allow it to be incorporated into appropriately designed industrial electrical assemblies.
Established Product Family
The Compact NS range has been used in industrial and commercial electrical distribution systems, making accurate model identification important for maintenance and replacement projects.
Technical FAQs
1. What is the Schneider NS630NA?
The Schneider NS630NA is a 630 A, three-pole non-automatic switch-disconnector from the Compact NS product family. It is designed for manual switching and electrical isolation.
2. Is the NS630NA a conventional automatic circuit breaker?
No. The NA designation identifies a non-automatic device. It does not provide automatic overload or short-circuit tripping protection.
3. What is the rated current of the NS630NA?
Its rated current is 630 A. The actual application must also satisfy the specified voltage, switching category, and installation conditions.
4. How many poles does this model have?
The NS630NA is a three-pole device designed for three-phase electrical systems.
5. What voltage can the NS630NA support?
The product documentation specifies an operational voltage of up to 690 V AC, subject to the applicable operating and utilization conditions.
6. Does it provide overload protection?
No. Separate upstream protective equipment must provide the required overload and short-circuit protection.
7. Where is the NS630NA commonly used?
It can be used in industrial power distribution panels, manufacturing facilities, motor control centers, pumping stations, and other installations requiring manual switching and isolation.
8. What are the dimensions of the NS630NA?
The supplied dimensions are 255 × 140 × 110 mm. Confirm the actual mounting and connection dimensions before panel installation.
9. What is the weight of the Schneider NS630NA?
The supplied product weight is approximately 5.2 kg.
10. Can the NS630NA be replaced with an automatic circuit breaker?
Not without reviewing the system design. An automatic circuit breaker provides protective functions that the NS630NA does not have. Any replacement must satisfy both the switching requirements and the required protection arrangement.
Procurement and Maintenance Recommendations
When purchasing the Schneider NS630NA, verify the complete model designation and confirm that the product is the non-automatic version rather than a similarly rated automatic circuit breaker.
For replacement projects, compare the rated current, pole configuration, voltage rating, terminal arrangement, and physical dimensions with the existing installation.
For used or surplus equipment, request clear photographs of the front label, terminals, operating mechanism, and overall housing. Check for signs of overheating, mechanical damage, corrosion, or abnormal wear.
During maintenance, inspect the connections, operating mechanism, mounting condition, and associated protective devices. Electrical connections should be checked by qualified personnel according to the applicable maintenance procedures.
Because the NS630NA does not provide automatic overcurrent protection, verify that the upstream protective arrangement remains correctly selected and operational.
Conclusion
The Schneider Electric NS630NA is a 630 A three-pole non-automatic switch-disconnector designed for industrial low-voltage power distribution and electrical isolation applications.
Its Compact NS construction, manual switching function, and industrial distribution rating make it suitable for installations requiring a dedicated switching and isolation device.
The most important consideration when selecting this model is its non-automatic operating characteristic. It must be coordinated with appropriate upstream protective equipment to ensure that the complete electrical system provides the required level of protection and operational safety.