Switch disconnectors and fuses, Introduction – Siemens AC-21A User Manual
Page 3
Siemens LV 10 · 2004
7/3
Switch Disconnectors and Fuses
Introduction
7
Type
3NP
3K
SENTRIC
Rated uninterrupted current
I
U
at 35 °C ambient temperature
A
160 ... 630
63 ... 1000
Rated operating voltage
U
e
V
690
690
AC-21
at 400 V
✓
✓
at 500 V
✓
✓
at 690 V
✓
✓
AC-22
at 400 V
✓
✓
at 500 V
✓
✓
at 690 V
✓
✓
AC-23
at 400 V
✓
✓
at 500 V
–
✓
at 690 V
–
✓
Switch versions
Front mounting
–
✓
Base mounting
✓
✓
Busbars
• 40 mm
✓
–
• 60 mm
✓
✓
• 185 mm
–
–
Molded-plastic enclosure
✓
✓
Switch accessories
4th pole (N conductor)
(leading switch-on,
delayed switch-off contact)
–
✓
Auxiliary contacts
1 NO + 1 NC
–
✓
1 CO
✓
✓
Fuse monitoring
• with circuit-breakers
✓
✓
• with electronics
✓
✓