Overview

This document provides technical specifications and details for the S6N series of 2-pole switch-disconnectors designed for DC current applications up to 1500 Vdc. The devices are rated for currents ranging from 125 A to 400 A and comply with IEC 60947-1 and IEC 60947-3 standards.

Product Range and Codes

• Rated currents: 125 A, 160 A, 200 A, 250 A, 315 A, 400 A
• Product codes vary by current rating and configuration, examples include S6N0160USS0, S6N0250UUS0, S6N0315SSS0, S6N0400USD0, etc.

Electrical Ratings

• Rated thermal current (Ith) at ambient temperatures:
  • 40ºC: 125 A to 400 A
  • 50ºC: 125 A to 400 A
  • 60ºC: 125 A to 360 A (400 A derated)
  • 70ºC: 125 A to 315 A (400 A derated)
• Rated insulation voltage (Ui): 1500 V DC for all models
• Rated impulse withstand voltage (Uimp): 12 kV
• Rated operational current (DC21B category) at 1500 Vdc matches thermal current ratings
• Short-circuit making capacity (Icm): 10 kA peak
• Short-time withstand current (Icw) for 1 second: 10 kA rms

Mechanical and Construction Features

• Number of mechanical operations: 8000 cycles (standard)
• Maximum weight: approximately 4.25 to 4.29 kg depending on model
• Terminals:
  • Maximum cross-section for copper conductors (S max): 185 mm² for 125-315 A, 240 mm² for 400 A
  • Maximum height (H max): 8 mm for 125-315 A, 8 mm for 400 A
  • Maximum length (L max): 25 mm for 125-315 A, 30 mm for 400 A
  • Terminal screws: M10 with 18 Nm tightening torque

Dimensions and Mounting

• Dimensions vary slightly by current rating; typical length around 225 mm, width 150 mm, height approximately 108-117 mm
• Door drilling templates provided for external handle installation
• Options for direct handle, external handle without shaft (IP65), and external handle with shaft (IP65)
• Shaft lengths and extensions available with specific codes (e.g., DS-EP14, DS-EP15)
• Auxiliary contacts available:
  • 1NO + 1NC (Code D5LAU01)
  • 2NO + 2NC (Code D5LAU02)
  • Rated for 16 A resistive and 4 A inductive loads at 250 Vac
• Rotated mounting versions available upon request

Standards and Certifications

• Compliant with IEC 60947-1 and IEC 60947-3 standards
• Short-circuit ratings tested without limiting protective devices (short-circuit duration 50-100 ms)

Additional Notes and Recommendations

• For other voltages or utilization categories, consultation with manufacturer is advised
• Grounded installation configurations require consultation
• Protective devices should be used to limit short-circuit duration for device safety

Summary

The S6N series switch-disconnectors are robust, high-voltage DC switches suitable for currents up to 400 A and voltages up to 1500 Vdc. They offer reliable mechanical endurance, high short-circuit withstand capabilities, and flexible mounting and accessory options. The devices are designed to meet stringent IEC standards and are suitable for demanding DC applications requiring safe disconnection and isolation.