Page 440 - ABB_Motor _Protection_and_Control_catalogue_20221216

3/364 ABB MOTOR PROTECTION AND CONTROL

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Mechanical interlock units, terminal shrouds and connection sets

Mechanical interlock units
The mechanical interlock unit prevents one of the contactors from closing as long as the other
03
contactor is closed.
VH800 interlock unit is used for the mechanical interlocking of two horizontal mounted EK550,
A090C4 EK1000 contactors. Mounting plate is included.
For contactors Type Order code Pkg Weight
qty (1 pce)
kg
Mechanical interlock unit for two horizontal mounted contactors
EK550, EK1000 VH800 SK829070-F 1 6.000

Terminal shrouds
The use of terminal shrouds on the main terminals of EK contactors is required in electrical panels
or cubicles to be built in compliance with the rules for protection against direct contact with live
parts in acc. with EN 50274.
On EK550, EK1000 contactors:
• The auxiliary contact blocks and coils are designed to provide an IP20 degree of protection
• The main terminals, equipped with lugs or connectors, can be protected against accidental di-
rect contact after wiring (EN 50274) by the addition of terminal shrouds (see table below).
Each terminal shroud protects all the terminals on one side of the contactor. Two terminal shrouds
should be provided for each separate contactor.
For contactors Type Order code Pkg Weight
qty (1 pce)
kg
EK550 LT550-EK SK178001-LB 1 0.190
EK1000 LT1000-EK SK178001-MB 1 0.200

Connection sets
A1 A1 Connection between the main poles of two 4-pole contactors mounted side by side so that they
1 3 5 7 7 5 3 1
operate as source reversing contactors.
2 4 6 8 8 6 4 2
A2 A2 These sets are made up of four downstream connections.
E0747D BSS550, BSS1000 – Bare, solid copper bars.
BSS550, BSS1000 For contactors Type Order code Pkg Weight
qty (1 pce)
kg
Mechanical and electrical interlock units for two horizontal mounted contactors
EK550 BSS550 SK829090-E 1 3.300
EK1000 BSS1000 SK829090-H 1 5.500