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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Manual operating mechanisms
4/29
Siemens LV 36 · 2008
4
■
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 lever, e.g. to switch machines on and
off. Modular conception of drives makes possible simple mount-
ing on the switching unit (also additionally) after the accessory
compartment cover is removed. A fixed motor is possible to seal.
The drive and its accessories is ordered separately according to
your choice
(see page 4/6)
.
• The rotary operating mechanismmakes possible to control the
circuit breaker:
- from the front panel of the circuit breaker (Fig.1)
3VT9 300-3HA/HB.. rotary operating mechanism
+ 3VT9 300-3HE/HF.. knob
- through the switchgear door (Fig. 2)
3VT9 300-3HA/HB.. rotary operating mechanism
+ 3VT9 300-3HJ.. extension shaft
+ 3VT9300-3HG/HH..couling driver
+ 3VT9 300-3HE/HF.. knob
• The rotary operating mechanism is fixed right on the switching
unit of the circuit breaker.
• The rotary operating mechanism coupling driver is fixed onto
the switchgear door and it provides protection IP40 or IP66.
• The rotary operating mechanism knob is placed on the rotary
operated mechanism unit or on the rotary operating mecha-
nism coupling driver
• The extension shaft is supplied in two versions, standard
(length 365 mm - can be cut short) and telescopic (adjustable
length 245 ... 410 mm).
Enhanced safety for operator :
• The rotary operating mechanism unit and knob are also sup-
plied with the possibility to lock the circuit breaker in position
“switched off manually“. The unit and lever of the rotary oper-
ating mechanism can be locked using three padlocks with
shank diameter max. 4 ... 6 mm.
• Each coupling driver prevents the door from opening when the
circuit breaker is on-state or off-state by releases and types
VT9300-3HG10 and VT9300-3HG20 when the circuit breaker
is in the state switched off manually and the knob is locked up.
• Two circuit breakers with hand drives can be provided with
mechanical interlocks or with mechanical interlocks for paral-
lel switching
(see page 4/30)
.
Features
Switchgear door locking in the cir-
cuit breaker state
Order No.
Description
Color
Locking while the
circuit breaker is in
OFF state
Protection switched on or off
by release
switched off
manually and
locked
Length
mm
3VT9 300-3HA10 Manual operating mechanism blue
no
--
--
--
--
3VT9 300-3HA20 Manual operating mechanism blue
yes
--
--
--
--
3VT9 300-3HB20 Manual 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