Professional 3-pole isolating switch with 100A rated current, 690V maximum voltage, visible isolation and positive contact action for commercial and industrial power installations.
The Legrand DPX-IS 250 is a professional-grade isolating switch designed for on-load circuit breaking with visible isolation and positive contact action. This 3-pole isolating switch features a rated current of 100A and is specifically engineered for commercial and middle power installations according to EN/IEC standard 60947-3, ensuring compliance with NEMA AB-1 specifications. The switch is suitable for use as a main switch, maintenance/service switch, safety switch, or emergency stop installation in various electrical applications.
This isolating switch operates at a maximum rated voltage of 690V AC with a rated operating voltage range of 230-690V. It provides exceptional performance with a rated short-time withstand current of 9 kA and a conditioned rated short-circuit current of 100 kA, making it ideal for demanding industrial and commercial environments. The DPX-IS 250 features a turn button control element with black coloring, padlock integrated in the handle for security, and the capability to be equipped with emergency use handle or vari-depth handle for enhanced versatility.
The device is constructed as a complete unit in housing suitable for floor mounting, front mounting with 4-hole configuration, and distribution board installation. It features cage terminals supplied with terminal shields for secure connection, three change-over auxiliary contacts, and an IP20 degree of protection on the front side. The switch is interlockable and can be mounted on DIN rail or on plate in XL³ or XL³ S enclosures, providing flexible installation options for various electrical distribution systems.
Key Features
- On-load circuit breaking with visible isolation and positive contact action
- 3-pole configuration with 100A rated current and 690V maximum operating voltage
- Suitable for main switch, maintenance/service switch, safety switch, and emergency stop applications
- Integrated padlock in handle with optional emergency use handle or vari-depth handle
- Cage terminals with terminal shields and 3 change-over auxiliary contacts
- IP20 degree of protection with interlockable design
- Compliant with EN/IEC 60947-3 and NEMA AB-1 standards
- Flexible mounting options: DIN rail, plate mounting, or distribution board installation
Technical Specifications
| Specification |
Value |
| Product Type | Isolating Switch |
| Model | DPX-IS 250 |
| Number of Poles | 3 |
| Rated Current | 100 A |
| Maximum Rated Operating Voltage | 690 V AC |
| Rated Operating Voltage Range | 230-690 V |
| Rated Insulation Voltage | 800 V |
| Rated Impulse Withstand Voltage | 8 kV |
| Rated Short-Time Withstand Current | 9 kA |
| Conditioned Rated Short-Circuit Current | 100 kA |
| Rated Operation Power at AC-23, 400V | 40 kW |
| Category of Use | AC23 (on-load circuit breaking) |
| Auxiliary Contacts | 3 change-over contacts |
| Control Element | Turn button (Black) |
| Connection Type | Cage terminals with terminal shields |
| Degree of Protection | IP20 (front side) |
| Mounting Options | DIN rail, plate mounting, distribution board installation |
| Construction | Complete device in housing |
| Interlockable | Yes |
| Reference Number | 026631 |
| EAN Code | 3245060266318 |
| Standards Compliance | EN/IEC 60947-3, NEMA AB-1 |
| Manufacturer | Legrand |
| Brand | Vistop |
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