Siemens 3KA52 Brochure - Page 2

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Siemens 3KA52 Brochure
Switch Disconnectors and Fuses
Introduction
Overview
Type
SENTRIC LD main control and EMERGENCY-STOP switches from 16 A to 125 A
Rated uninterrupted current I
at 35 °C ambient temperature
Rated operating voltage U
AC-3 motor load switch
operational switching of individual motors
7
at 220 ... 240 V
at 380 ... 440 V
at 660/690 V
AC-23A main control switch,
maintenance switch
Frequent, but not operational switching of
individual motors
at 220 ... 240 V
at 380 ... 440 V
at 660/690 V
Switch versions
Front mounting
• Central
• Four-hole
Base mounting
• Central
• Four-hole
Distribution board mounting
Molded-plastic enclosure
• Heavy-gauge threaded joints
• Metric screws
Switch accessories
4th pole (N conductor)
(leading switch-on,
delayed switch-off contact)
N terminal
PE/ground terminal
Auxiliary contacts
1 NO + 1 NC
1 NO
1 NC
7/2
Siemens LV 10 · 2004
3LD20
A
16
U
V
690
e
kW
3.0
kW
5.5
kW
5.5
kW
4.0
kW
7.5
kW
7.5
3LD21
3LD22
3LD25
25
32
690
690
4.0
5.5
7.5
9.5
7.5
9.5
5.0
6.0
9.5
11.5
9.5
11.5
3LD27
63
100
690
690
11.0
18.5
18.5
30.0
15.0
22.0
11.0
18.5
22.0
37.0
18.5
30.0
3LD28
125
690
22.0
37.0
30.0
22.0
45.0
37.0