Accessories
4.4 Plug-in and draw-out technology
3VA molded case circuit breakers with UL and IEC certification
238
Manual, 01/2019, L1V30435333-01
Installation instructions
The draw-out socket is permanently mounted in the panel by means of the mounting screws
included in the complete kit for draw-out technology.
The molded case circuit breaker / molded case switch comes with two assembly screws
(3-pole version) or four assembly screws (4-pole version). These screws are not required if
the device is to be converted to a draw-out unit.
Note
The draw-out technology complete kits for circuit breaker sizes 3VA6 600 (3VA944.-0KD00)
additionally come with offset bus connectors extended and corresponding terminal covers
extended and corresponding terminal covers. For temperature reasons, molded case circuit
breakers of size 3VA6 600 are installed and operated only with draw-out sockets with offset
bus connectors extended.
Terminal cover
Two terminal covers are included in the scope of supply of the complete kit for draw-out
technology and the conversion kit for draw-out technology for the molded case circuit
breaker. These two terminal covers are intended for the molded case circuit breaker. If
terminal covers are to be attached to the busbars of the draw-out socket, they must be
ordered separately, see chapter Insulating equipment (Page 203).
Autotrip plunger
An autotrip plunger is supplied as standard with every complete kit and every conversion kit
for converting a molded case circuit breaker to draw-out technology.
WARNING
Arcing hazard
Insertion and withdrawal of the 3VA UL molded case circuit breaker in switched-on state
(circuit breaker position ON) leads to formation of arcs between contacts and can result in
irreparable damage to the molded case circuit breaker and electrical installation as well as
bodily injuries.
Install an auto-trip plunger in all 3VA UL molded case circuit breakers before inserting into
a plug-in or draw-out base. Always turn the circuit breaker OFF before removing from a
plug-in or draw-out base.
Note the color coding and labels for the autotrip plunger:
•
Plug-in technology: Black, labeled "Plug-in"
•
Draw-out technology: Grey, labeled "Draw-out"
The autotrip plunger cannot be removed from the circuit breaker after installation.
When a molded case circuit breaker is converted to a molded case circuit breaker for
draw-out technology, the autotrip plunger is installed from the rear of the device and latched.
