Справочник Пользователя для Siemens Automobile Electronics 3RA2
Combination Starters & Starters for Group Installation
SIRIUS 3RA2 Motor Starters
General data
6/2
SIRIUS Innovations Supplement 2011
6
■
Overview
3RA2 motor starters
The 3RA2 fuseless motor starters consist of the 3RV2 motor
starter protector and the 3RT2 electromechanical contactor. The
devices are electrically and mechanically connected using pre-
assembled assembly kits (link modules, wiring kits and standard
mounting rail or busbar adapters).
starter protector and the 3RT2 electromechanical contactor. The
devices are electrically and mechanically connected using pre-
assembled assembly kits (link modules, wiring kits and standard
mounting rail or busbar adapters).
Around 500 preassembled 3RA2 combinations of these innova-
tive 3RT2 controls and 3RV2 protection equipment can be
ordered for direct-on-line and reversing starting of standard in-
duction motors up to 32 A (approx. 20 HP/460 V).
tive 3RT2 controls and 3RV2 protection equipment can be
ordered for direct-on-line and reversing starting of standard in-
duction motors up to 32 A (approx. 20 HP/460 V).
In the 3RA2 motor starter, the 3RV2 motor starter protector is
responsible for overload and short-circuit protection. Back-up
protective devices, such as melting fuses or limiters, are super-
fluous here, as the motor starter protector is capable of with-
standing short-circuits up to 65 kA at 480 V and 30 kA at 600 V.
See the the actual SCCR ratings by device listed on the selection
pages of this chapter.
responsible for overload and short-circuit protection. Back-up
protective devices, such as melting fuses or limiters, are super-
fluous here, as the motor starter protector is capable of with-
standing short-circuits up to 65 kA at 480 V and 30 kA at 600 V.
See the the actual SCCR ratings by device listed on the selection
pages of this chapter.
The 3RT2 contactor is particularly suitable for extremely
complex switching tasks requiring the greatest endurance.
complex switching tasks requiring the greatest endurance.
The 3RA2 motor starters are available with setting ranges from
0.14 to 32 A in sizes S00 and S0:
0.14 to 32 A in sizes S00 and S0:
The size of the 3RA2 motor starters is based on the size of the
contactor:
contactor:
1)
The combination of an S00 motor starter protector with an S0 contactor is
possible only for screw connection versions.
possible only for screw connection versions.
Operating conditions
3RA2 motor starters are climate-proof. They are intended for use
in enclosed rooms in which no severe operating conditions
(such as dust, caustic vapors, hazardous gases) prevail. Suit-
able covers must be provided for installation in dusty and damp
locations.
in enclosed rooms in which no severe operating conditions
(such as dust, caustic vapors, hazardous gases) prevail. Suit-
able covers must be provided for installation in dusty and damp
locations.
Tripping times
All 3RA2 motor starters described here are designed for normal
starting, in other words for overload tripping times of less than
10 s (CLASS 10). At rated-load operating temperature the trip-
ping times are shorter, depending on the particular equipment
and the setting range. The exact values can be derived from the
tripping characteristics of the motor starter protectors.
starting, in other words for overload tripping times of less than
10 s (CLASS 10). At rated-load operating temperature the trip-
ping times are shorter, depending on the particular equipment
and the setting range. The exact values can be derived from the
tripping characteristics of the motor starter protectors.
Connection methods
For all 3RA2 starters up to 32 A, spring-type connection is avail-
able as well as screw connection. To connect two devices with
spring-type connection there are plug-in connection modules for
sizes S00 and S0 which enable very quick mounting of the start-
ers and a vibration-resistant assembly.
able as well as screw connection. To connect two devices with
spring-type connection there are plug-in connection modules for
sizes S00 and S0 which enable very quick mounting of the start-
ers and a vibration-resistant assembly.
To connect a motor starter protector with screw connection to a
contactor with spring-type connection there are special hybrid
connection modules for S00 and S0.
contactor with spring-type connection there are special hybrid
connection modules for S00 and S0.
While starters can be assembled with either spring-type or
screw connection, the pre-assembled versions offered in this
chapter are with screw terminals only. For spring-type versions,
simply order the components listed on the spring-type terminal
pages and assemble these starters quickly and efficiently with-
out the use of any tools.
screw connection, the pre-assembled versions offered in this
chapter are with screw terminals only. For spring-type versions,
simply order the components listed on the spring-type terminal
pages and assemble these starters quickly and efficiently with-
out the use of any tools.
Size
Width
Max. rated current
I
I
n max
For induction motors
up to
up to
mm
A
HP
S00
45
16
10
S0
45
32
20
Size of 3RA2
S00
S0
Size of 3RV2 motor starter protector
S00
S00
1)
, S0
Size of 3RT2 contactor
S00
S0
Screw terminals
Spring-type terminals
These terminals are indicated in the corresponding
tables by the symbols shown on orange
backgrounds.
tables by the symbols shown on orange
backgrounds.
© Siemens AG 2011