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EKF PROxima PK cam switches are mechanical switching devices. They are designed for use in AC circuits with a nominal voltage of up to 400 V and a frequency of 50/60 Hz. Due to the high silver content in the contacts, low contact resistance and increased resistance to environmental factors are achieved. Several versions of cam switches are produced: • PK-1 – standard cam switch with various switching schemes and different number of poles; • PK-2 – three-phase cam switch with an improved contact group (load switch); • PK-3 – three-phase cam switch in an IP 54 protective box (load switch). PK-1 and PK-2 switches are produced with front mounting. They are installed on the front panel of switchgear, control panels, etc. PK-3 switches with rear mounting are installed on the mounting panel.
Phase-to-phase measurement capability
No
Built-in motor drive
No
Phase-to-neutral measurement
No
Design as auxiliary/maintenance switch
No
Version as switch-disconnector
No
Version as main switch
Yes
Design as protective switch
No
Version as emergency switching-off device
No
Number of auxiliary NO contacts
0
Number of auxiliary changeover contacts
0
Number of auxiliary break contacts
0
Number of switch positions
2
Number of poles
3
Complete device in housing
Yes
Design
Surface-mounted device
Maximum rated operational voltage Ue AC
400 В
Modular design
No
Motor drive optional
No
Independent trip unit
No
Rated continuous current Iu
63 А
Suitable for front panel mounting
No
Suitable for front panel mounting, 4 holes
Yes
Suitable for central front panel mounting
No
Suitable for base mounting
No
Suitable for intermediate mounting
No
Suitable for distribution board
Yes
Front panel size
64x64 mm
With interlock
No
With control unit
No
With return to zero position
No
With zero position
Yes
Ingress protection (IP) of front side
IP65
Front protection rating (NEMA)
13
Switch type
ON/OFF switch
Switch type
ON/OFF switch
Product/component type
Cam switch
Control element type
Short rotary handle (narrow grip)
Width in modular units
4
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