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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Manual operating mechanisms
3/28
Siemens LV 36 · 2008
3
■
Overview
Rotary operating mechanisms
The following elements of the rotary operating mechanisms need
to be used:
• for controled use of the switch unit with:
- 3VT9 300-3HE10 or 3VT9 300-3HE20 black knob
- 3VT9 300-3HF20 red knob
• for controlling through the switchgear cabinet door with:
- 3VT9 300-3HJ..extension shaft
- 3VT9 300-3HG/HH.. coupling driver for door-coupling oper-
ating mechanism
- 3VT9 300-3HE/HF.. knob
Mechanical interlocks and mechanical interlocks for parallel
switching
• Mechanical interlocks for fixed-mounted versions are to be
completed by:
- 2 x 3VT9 200-3HA/HB.. rotary operating mechanism
- 2 x 3VT9 200-3HE/HF.. knob
• Mechanical interlocking with Bowden wire is intented for fixed-
mounted, plug-in and withdrawable designs
• Mechanical interlocking is to be completed with:
- 2 x 3VT9 200-3HA/HB.. rotary operating mechanism
- 1 x 3VT9 200-3HE/HF.. knob
■
Design
The rotary operating mechanism makes possible to govern the
circuit breaker by pivoting knob, e.g. to switch machines on and
off. Modular conception of operating mechanisms makes possi-
ble simple mounting on the switching unit (also additionally) after
the accessory compartment cover is removed. A fixed motor is
possible to seal. The operating mechanism and its accessories
is ordered separately according to your choice
(see page 3/6)
.
• The rotary operating mechanismmakes possible to control the
circuit breaker:
a) from the front panel of the circuit breaker (Fig.1)
3VT9 200-3HA/HB.. rotary operating mechanism
+ 3VT9 300-3HE/HF.. knob
b) through the switchgear door (Fig. 2)
3VT9 200-3HA/HB.. rotary operating mechanism
+ 3VT9 300-3HJ.. extension shaft
+ 3VT9 300-3HE/HF.. knob
+ 3VT9 300-3HG/HH.. coupling driver for door-coupling
operating mechanism
• The rotary operating mechanism is fixed right on the switching
unit of the circuit breaker
• The coupling driver is fixed onto the switchgear door and it
provides degree of protection IP40 or IP66
• The knob is placed on the rotary operating mechanism or on
the coupling driver
• The extension shaft is supplied in two options, standard
(length 365 mm - can be cut short) and telescopic (adjustable
length 245 ... 410 mm).
Enhanced safety for operator:
• The rotary operating mechanism and knob are also supplied
with the possibility to lock the circuit breaker in position
“switched off manually“. The unit and knob of the rotary oper-
ating mechanism can be locked using three padlocks with
shank diameter max. 4 ... 6 mm
• Each coupling driver for door-coupling operating mechanism
prevents the door from opening when the circuit breaker is on-
state or off-state by releases and types 3VT9300-3HG10 and
3VT9300-3HG20 when the circuit breaker is in the state
switched off manually and rotary operating mechanism knob
is locked up
• Two circuit breakers with rotary operating mechanisms can be
provided with mechanical interlock or with parallel mechanical
switching
(see page 3/62)
.
Features
Order No.
Description
Colour
Locking while
the circuit breaker
is in OFF state
Degree of
protection
Switchgear door locking in the circuit breaker state
switched on or
off by release
switched off
manually and
locked
Length
mm
3VT9 200-3HA10 Rotary operating mechanism grey
no
--
--
--
--
3VT9 200-3HA20 Rotary operating mechanism grey
yes
--
--
--
--
3VT9 200-3HB20 Rotary operating mechanism yellow
yes
--
--
--
--
3VT9 300-3HE10 Knob
black
no
--
--
--
--
3VT9 300-3HE20 Knob
black
yes
--
--
--
--
3VT9 300-3HF20 Knob
red
yes
--
--
--
--
3VT9 300-3HG10 Coupling driver
black
--
IP40
yes
yes
--
3VT9 300-3HG20 Coupling driver
yellow
--
IP40
yes
yes
--
3VT9 300-3HH10 Coupling driver
black
--
IP66
yes
no
--
3VT9 300-3HH20 Coupling driver
yellow
--
IP66
yes
no
--
3VT9 300-3HJ10 Extension shaft
--
--
--
--
--
365 (can be
short)
3VT9 300-3HJ20 Extension shaft, telescopic --
--
--
--
--
245 ... 410