Brochure
Table Of Contents
- 2 3RV1 Circuit Breaker/MSP 1)
- 2.1 Specifications/regulations/approvals
- 2.2 Device description
- 2.3 Application and areas of use
- 2.4 Accessories
- 2.4.1 Attachable accessories: Overview
- 2.4.2 Auxiliary contacts 3RV19 01-.., alarm switch 3RV19 21-111 and auxiliary release 3RV19 .2-....
- 2.4.3 Motorized remote-control mechanism 3RV19 .6-....
- 2.4.4 Disconnecting/isolator module 3RV19 .8-1A
- 2.4.5 Thru-the door rotary operators 3RV19 .6-..
- 2.4.6 Terminals for "Combination Motor Controller Type E" in acc. with UL 508
- 2.4.7 Enclosures and mounting accessories
- 2.4.8 Busbar adapter 8US1 (Fastbus system)
- 2.4.9 Isolated 3-phase busbar system
- 2.4.10 Link module for connection to a contactor
- 2.5 Mounting and connection
- 2.6 Dimensional drawings (measurements in mm)
- 2.7 Technical specifications
- 2.7.1 General specifications
- 2.7.2 Permissible rating of approved devices for North America, u s
- 2.7.3 Short-circuit breaking capacity Icn in acc. with IEC 60 947-2
- 2.7.4 Limiter function with standard devices for 500 VAC and 690 VAC in acc. with IEC 60 947-2
- 2.7.5 Characteristics
- 2.7.6 Installation guidelines
- 2.8 Application notes for the use of 3RV1 downstream from frequency converters/ inverter with pulsing voltage
3RV1 Circuit Breaker/MSP
SIRIUS System Manual
GWA 4NEB 430 0999-02 DS 01
2-13
2.3 Application and areas of use
The tripping characteristics of the 3RV1 circuit breaker/MSPs are designed
primarily to protect three-phase induction motors. The circuit breaker/MSPs
are therefore also referred to as motor protecting switches. In Europe, the
3RV10 circuit breaker/MSPs for motor protection can also be used in the
protection of systems.
2.3.1 Motor protection
Current setting The current of the motor that is to be protected is set on the adjustment
scale. This sets the integrated overload protection of the motor current. The
short-circuit release is set at the factory to 13 times the value of the rated
current (the highest value on the current scale) of the circuit breaker/MSP.
This ensures problem-free startup and reliable protection of the motor.
Phase loss
sensitivity
The phase loss sensitivity of the circuit breaker/MSP ensures that it trips in
the event of the loss of a phase and the resulting overcurrents in the other
phases.
CLASS10/CLASS20 Circuit breaker/MSPs of frame sizes S00 to S3 (0-100 A) with thermal over-
load releases comply with tripping class 10 (CLASS 10). Circuit breaker/
MSPs with the CLASS 20 tripping characteristic are also available for frame
sizes S2 and S3 (11-100 A) for longer startup conditions.
2.3.2 Transformer protection
Inrush current In the case of primary protection of control transformers, the high inrush
currents that occur when the transformers are switched on often result in
the unwanted tripping of the protective devices.
Therefore, the 3RV14 circuit breaker/MSPs have overcurrent releases for the
protection of transformers that are set at the factory to approximately 19
times the rated current. This makes it possible to protect transformers in
which the inrush currents reach peak values of up to 30 times the rated cur-
rent with circuit breaker/MSPs in the primary circuit. The 3RV14 for trans-
former protection come in frame sizes S0 and S2 (0 to 40 A).
In the case of control transformers with low inrush current (SIEMENS 4AM
control transformers, for example), this is not required. 3RV10 circuit
breaker/MSPs can be used. In these lower inrush applications the 3RV14
devices are not UL listed for the protection of transformers.
2.3.3 Starter protection
The 3RV13 starter protection switches are circuit breakers without overload
releases. They are used together with a contactor and overload relay if the
circuit breaker/MSP is not to be triggered in the case of overload tripping.
Like the 3RV10 the short-circuit release is set at 13 times the rated current.
The 3RV13 are available in frame sizes S0 to S3 (0 to 100 A).