Siemens LV 10 · 2004 7/19
SENTRIC NP Fuse Switch Disconnectors
General data
7
1)Only for isolating links; otherwise note instructions of the fuse manufac-
turer.
Standards IEC 60 947-1, IEC 60 947-3, VDE 0660 Part 107
Type 3NP40 1 3NP40 7 3NP42 7 3NP43 7 3NP44 7
Capacitor switching capacity
at AC 400 V
Capacitor power kvar 50 50 – – –
Rated current InA72 72 – – –
at AC 525 V
Capacitor power kvar 50 50 – – –
Rated current InA55 55 – – –
Permissible ambient temperature °C –25 ... +551) for operation, –50 ... +80 for storage
Mechanical endurance Operations 2000 2000 1600 1000 1000
Degree of protection
(with respect to the operator side)
Without molded-plastic masking frame/cable
lug cover IP00 (3NP40 with box terminal and properly connected conductors: IP20)
With molded-plastic blanking plate/cable lug
cover IP30 (contacts closed), IP20 (contacts open)
Power loss of the switch disconnector at Ith
(plus power loss of the fuse links) a
Without busbar adapter W 4.5 (at 100 A) 10 15 30 47
With busbar adapter W 8.5 (at 100 A) 20 47 83 127
Main conductor connection
Flat pad connection for cable lug,
max. conductor cross-section (stranded)
mm2–up to 2 × 70
(M 8) up to 150
(M 10) up to 240
(M 10) up to 2 × 240
(M 12)
Box terminal/supply terminal
(finely stranded with end sleeve)
mm21.5 ... 50 (35) 2.5 ... 70 (50) 70 ... 150 120 ... 240 150 ... 300
Conductor bar (width x thickness) mm –22 × 5 22–30 × 5–10 22–30 × 5–10 25–40 × 5–10
Louvered Cu strips, unperforated in terminals
(width × thickness)
mm 8 × 8 up to 9 × 8 up to 16 × 8 up to 20 × 10 up to 24 × 10
Tightening torque for terminal screws
For flat pad connection Nm –10 ... 12 25 25 30
With SIGUT box terminal/connection terminal Nm 3 ... 3.5 8 ... 10 6 8 8
Auxiliary switch 1 CO (Accessory)
3NY3 035 AC 50 Hz/60 Hz up to 230 V
Rated operating current Ie at AC-14 A0.25 (Ith = 5 A), at DC 24 V: Ie = 0.45 A; flat connector to DIN 46244: A 2.8 × 0.5
3NY3 030 AC 50 Hz/60 Hz up to 230 V
Rated operating current Ie at AC-13 A0.1 (Ith = 0.1 A); plug-in sleeve to DIN 46245: A 2.8 – 1
Permissible mounting position Vertical or horizontal (no reduction in specified switching capacity)