The Schneider Electric 31150 is a 3-pole, 400 A manual transfer switch (INS400) designed for manual source changeover applications, rated up to 690 V AC and compliant with IEC 60947-3. It provides reliable manual switching between power sources with a direct front rotary handle and integrated mechanical interlock.

Technical specifications:

• Commercial reference: 31150
• Manufacturer: Schneider Electric
• EAN: 3303430311508
• Series / range: TransferPacT Compact, INS320…630
• Device short name: INS400
• Product type: Manual transfer switch
• Number of poles: 3P
• Network type: AC / DC
• Network frequency: 50/60 Hz
• Rated current [Ie]: 400 A (AC-22A and AC-23A at 220/240 V to 660/690 V AC 50/60 Hz; DC-22A and DC-23A at 125 V DC, 2 poles in series)
• Conventional thermal current [Ith]: 400 A at 60 C
• Rated voltage [Ue]: 690 V AC 50/60 Hz / 125 V DC per IEC 60947-3
• Rated insulation voltage [Ui]: 750 V AC 50/60 Hz
• Rated impulse withstand voltage [Uimp]: 8 kV
• Making/breaking capacity [Icm]: 330 kA with circuit breaker at 690 V AC 50/60 Hz; 50 kA as isolator only at 690 V AC 50/60 Hz
• Short-time withstand current [Icw]: 20 kA for 1 s; 11.5 kA for 3 s; 4.9 kA for 20 s; 4 kA for 30 s per IEC 60947-3
• Transfer switch class: PC
• Number of contact positions: 3
• Control type: Direct front rotary handle
• Operation mode: Manual
• Duty cycle: Continuous
• Intermittent duty class: Class 120 – 60%
• Mechanical endurance: 10,000 cycles
• Electrical endurance: 1,500 cycles at 440-690 V AC (AC-22A/AC-23A); 1,000 cycles at 125 V DC (DC-23A)
• Mechanical interlock: Yes
• Mounting: DIN rail or plate, fixed
• Connection: Front (top and bottom), 45 mm
• Padlocking: Lockable in OFF position
• Contact position indicator: Yes
• IP protection: IP40 per IEC 60947-3
• Pollution degree: 3
• Electric shock protection class: Class II
• Operating temperature: -25…70 C
• Dimensions (WxHxD): 395 x 205 x 155 mm
• Weight: 13.5 kg
• Standards: IEC 60947-3, IEC 60947-1
• Certifications: CB
• Warranty: 18 months

Features and benefits:

• Manual front rotary handle enables direct, ergonomic source changeover without auxiliary power
• Integrated mechanical interlock prevents simultaneous connection of both power sources
• Lockable in the OFF position for safe maintenance and isolation procedures
• Contact position indicator provides immediate visual confirmation of switch state
• High short-circuit making capacity of 330 kA (with upstream circuit breaker) ensures robust panel integration
• Wide operating temperature range of -25…70 C suits demanding industrial environments

Applications:

• Manual changeover between mains and generator supply in commercial and industrial buildings
• Power source transfer in critical infrastructure panels requiring manual operator control
• Industrial distribution boards where manual intervention is required for source selection
• Backup power switchover in facilities with standby generator systems
• Applications requiring safe isolation and lockout in multi-source power configurations

Compliant with IEC 60947-3 and IEC 60947-1. Part of the Schneider Electric TransferPacT Compact range.

Also known as: Schneider 31150, Schneider Electric 31150, INS400 manual transfer switch, Schneider 400A changeover switch.