GE D400-3P SD | 3-Pole Switch Disconnector for Power Distribution

The GE D400-3P SD is a high-performance 3-pole switch disconnector from the D400 series (often associated with the Record Plus or ElfaPlus lines). Unlike a standard circuit breaker that provides automatic overcurrent and short-circuit protection, a Switch Disconnector (SD) is designed to safely perform manual making, breaking, and isolation of electrical circuits under load. It provides a visible and reliable point of isolation for maintenance, ensuring that downstream equipment is completely de-energized.

Product Specifications

  • Model Number: D400-3P SD

  • Pole Configuration: 3-Pole (3P)

  • Type: Switch Disconnector (Non-Automatic)

  • Nominal Current (): Typically 400A (depending on specific frame size)

  • Rated Operational Voltage (): 415V / 690V AC

  • Rated Insulation Voltage (): 800V – 1000V

  • Weight: Approximately 4.50 kg

  • Country of Origin: Italy / Poland (GE Industrial Solutions)

  • Mechanical Endurance: 10,000+ operations

  • Protection Rating: IP20 (standard terminal protection)

Application Fields

The D400-3P SD is a critical component in industrial and commercial electrical switchboards. It is widely used as a Main Incoming Switch or a Local Isolation Switch for large motors, HVAC systems, and distribution panels in factories, hospitals, and infrastructure projects. Its primary role is to serve as a safety interlock, allowing technicians to isolate a section of the electrical grid for repairs or upgrades without affecting the entire facility.

GE D400-3P SD - CIRCUIT BREAKER

Product Instructions

This switch disconnector is designed for installation on a standard mounting plate or within a GE modular enclosure. It can be mounted vertically or horizontally without derating. When wiring, ensure that the busbars or cables are tightened to the manufacturer’s specified torque to prevent overheating at the terminals. As a non-automatic switch, it must be paired with upstream fuses or a molded case circuit breaker (MCCB) to provide necessary short-circuit and overload protection. The handle features a padlocking facility in the “OFF” position to comply with LOTO (Lockout-Tagout) safety procedures.

FAQ: Common Questions and Answers

Q: Does the D400-3P SD trip automatically during a short circuit? A: No. This is a Switch Disconnector (SD), not a circuit breaker. It is designed to withstand short-circuit currents for a specific duration, but it will not “trip” on its own. It requires an external protective device to clear faults.

Q: Can I use this switch for DC applications? A: While primarily designed for AC power distribution, some D400 variants are rated for DC. You must verify the specific voltage and current ratings on the product nameplate before using it in a DC circuit.

Q: Can I add auxiliary contacts to this switch? A: Yes. The D400 series supports a variety of snap-on accessories, including auxiliary switches for remote status signaling (ON/OFF) and shunt trips for remote emergency shutdown.

For procurement and detailed technical dimensions of the GE D400-3P SD, please contact our electrical distribution team.

Recommended Similar Models

  • GE D400-3P (Standard 3-Pole MCCB version)

  • GE Record Plus FD160 (Compact Circuit Breaker)

  • GE ElfaPlus D-Series (Miniature Isolation Switches)

  • ABB OT400 (Equivalent 400A Switch Disconnector)

  • Schneider Compact INS400 (Alternative Switch-Disconnector)

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