Schneider SEP888 Mimic-Based Base Unit

The Schneider SEP888 serves as a mimic-based base unit for Sepam Series 80 digital protection relays. It helps operators monitor and control electrical distribution systems like feeders, transformers, motors, and generators. The unit features an animated mimic diagram and LED indicators, which provide clear, intuitive visualization of system status and alarms. This design makes it ideal for medium- and low-voltage electrical applications.

Technical Specifications

User Interface & Display

• Mimic-based UMI (User Machine Interface)
• Display resolution: 128 × 240 pixels
• Number of keys: 14
• Local signaling:
  • 2 LEDs for Sepam operating status (front and back)
  • 9 LEDs for parameter indication (front)

Electrical Characteristics

• Rated supply voltage: 24–250 V DC
• Voltage tolerance: –20% to +10%
• Max power consumption: < 16 W
• Inrush current: < 10 A for 10 ms
• Battery: 3.6 V lithium (½ AA size)
• Battery life (energized): 10 years
• Battery life (not energized): 8 years

Output Relays

• Annunciation relay ratings: 24–220 V DC / 100–240 V AC
• Continuous current: 2 A
• Breaking capacity: 0.15–2 A (depending on voltage)
• Control relay ratings:
  • Continuous current: 8 A
  • Breaking capacity: 0.1–8 A (depending on voltage)
  • Making capacity: < 15 A for 200 ms

Mechanical & Environmental

• Mounting: Plate-mounted
• Dimensions (H × W × D): 222 × 264 × 89.7 mm
• Weight: 4.22 kg
• Protection rating:
  • IP52 (front panel)
  • IP20 (other parts)
• Fire resistance: 650°C (IEC 60695-2-11)