Datasheet

3RV Molded Case Motor Starter Protectors up to 800 A
43
Siemens · 2010
General data
■ Configuration
The 3RV1 molded case motor starter protectors for up to 800 A
are optimally coordinated and tested for combinations with 3RT
contactors and, in starter combinations, with Sirius 3RU/3RB
overload relays and SIMOCODE 3UF7. Detailed assignment ta-
bles for the special voltages 440 V, 480 V, 550 V and 690 V are
included in the Configuration Manual „SIRIUS Configuration -
Selection data for Fuseless Load Feeders“,
Order No. 3ZX1012-0RA21-0AC0“
or as a PDF file on the Internet at
http://support.automation.siemens.com/WW/view/en/40625241
Prevention of unintended tripping
In order to prevent unwanted tripping of the molded case motor
starter protectors, they should always be connected such that
current flows through all 3 main current paths.
Short-circuit protection
If a short-circuit occurs, the short-circuit releases of the 3RV1
molded case motor starter protectors isolate the faulty load fee-
der from the network and thus prevent further damage.
Motor starter protectors with a short-circuit breaking capacity of
50 kA or 100 kA are virtually short-circuit resistant at a voltage of
400 V AC, since higher short-circuit currents are not to be ex-
pected in practice.
Motor protection
The tripping characteristics of the 3RV10 molded case motor
starter protectors are designed mainly to protect induction
motors.
The motor starter protectors are therefore also referred to as
motor-protective circuit breakers
.
Short-circuit protection for starter combinations
The 3RV13 molded case motor starter protectors for starter com-
binations provide short-circuit protection for combinations of a
contactor and overload relay.
• On overload, the overload relay triggers the contactor,
the motor starter protector remains closed.
• Only when a short-circuit occurs in the feeder does the motor
starter protector trip as well.
The molded case motor starter protectors for starter combina-
tions must always be used in combination with an overload relay
because the motor starter protector alone cannot protect the
motor and itself against overload.
Altitude
The molded case motor starter protectors can be used without
restriction at altitudes up to 2000 meters. At higher altitudes it is
important to take account of the amended characteristics of the
motor starter protector according to the following table.
Temperature characteristic
At higher temperatures it is necessary to take account of a re-
duction in the maximum permissible rated uninterrupted current
(derating).
The maximum rated operational currents for the different 3RV1
molded case motor starter protectors are listed in the following
table. These permissible loads apply for the molded case motor
starter protectors with standard terminals, with front-extended
terminals (see "Accessories") and with front-extended cable ter-
minals (see "Accessories").
If required, derating values for rear-accessible terminals (see
"Accessories")
can be obtained from "Technical Assistance":
• Either by e-mail to:
[e-mail]
• Or on the Internet:
http:/www.siemens.com/automation/service&support
Altitude
m
Max. rated operational
voltage U
e
V AC
Max. rated operational
current
I
e
in % of I
n
2000 690 100
3000 600 96
4000 500 93
5000 440 90
Molded
case
motor
starter
protec-
tors
Max.
rated
current
I
e
Max. rated operational current I
e
at
45 °C 50 °C 55 °C 60 °C 65 °C 70 °C
A A A A A A A
3RV1. 5 32 32 32 32 32 32 32
3RV1. 6 250 250 250 250 250 230 220
3RV1. 7 400 400 400 400 400 376 352
630 630 580 552 530 504 479
3RV1. 8 630 630 630 565 598 583 567
800 800 800 780 760 740 720