3RV Motor Starter Protectors/Circuit Breakers up to 100 A General data 3RV16 voltage transformer circuit breakers up to 3 A The voltage transformer circuit breaker widely corresponds with the SIRIUS 3RV1 motor starter protector, size S00. Two special features are taken into account for safe prevention of false trip- ping of the distance protection device. voltage transformer circuit breaker. This changeover contact can be used as 1 NO (11-14) or 1 NC (11-12). Thanks to the high contact stability of these auxiliary contacts at the lowest possible rated operational currents, they are also suitable for modern solid-state distance protection devices.
Auxiliary switch for blocking the distance protection The laterally mounted auxiliary switches of the SIRIUS range can be used for signaling purposes. They cannot be used for blo- cking the distance protection device. The main contacts of the circuit breaker are opened if the vol- tage transformer circuit breaker is tripped or switched off. The distance protection would falsely interpret low impedance as a fault, which results in immediate power disconnection within only a few milliseconds. Impedance across the main contacts There is only minor current flow across the main contacts of the voltage transformer circuit breaker.
To prevent this false tripping, special auxiliary contacts with a time-dependent assignment to the circuit breaker's main con- tacts (see timing diagram) must be provided. The distance pro- tection is blocked with the help of these auxiliary contacts and thus prevents false tripping. To ensure reliable functioning of the distance protection, transfer resistance of the main contacts must be minimal and nearly con- stant throughout the endurance of the circuit breaker. This is implemented with suitable contacts and contact materials for the 3RV16 voltage transformer circuit breaker.
An auxiliary switch for blocking the distance protection device is available as 1 changeover contact fitted permanently in the 1 0 ON Tripping due to short-circuit 0 1 OFF 0 1 1 NO 11-14 +20 -10 5 1 NC 11-12 +20 -10 5 NSB0_01098c Timing diagram of auxiliary switches for blocking distance protection (1 changeover contact) 0 (ms) (ms) (ms) 0 0 Installation guidelines for motor starter protectors/circuit breakers When mounting the motor starter protectors, the following clea- rances must be maintained to grounded or live parts and to ca- ble ducts made of molded plastic.
Installation guidelines for motor starter protectors/circuit breakers with limiter function 9 Siemens · 2009 Motor starter protectors/circuit breakers Distance to grounded or live parts and to molded-plastic cable ducts acc. to IEC 60947-2 Type Size Ue V Y mm X mm Z mm X .. 3RV1. SB0_01304d N Y Y 6T3 5L3 Z .. . RV1 4T2 3L2 3 2T1 1L1 6T3 5L3 .. . RV1 4T2 3L2 3 2T1 1L1 Z 3RV1. 1, 3RV16 1. S00 Up to 690 20 70 9 3RV1. 2, 3RV17 21, 3RV18 21 S0 Up to 500 Up to 690 30 50 90 90 9 30 3RV1. 3 S2 Up to 690 50 140 10 3RV1.
4 S3 Up to 240 Up to 440 Up to 500 Up to 690 50 70 110 150 167 167 167 167 -- -- 10 30 3RV17 42 S3 Up to 240 Up to 400 90 90 167 167 10 10 Motor starter protectors/circuit breakers Distance to grounded or live parts and to molded-plastic cable ducts acc. to IEC 60947-2 Type Size Ue V Y mm X mm Z mm Z Z X 1L1 3L2 5L3 1L1 3L2 5L3 Y 3RV1. .. 3RV1. .. 3RV1. .. Y 2T1 4T2 6T3 2T1 4T2 6T3 NSB0_01071c 3RV1. 2 S0 Up to 500 Up to 690 40 50 90 90 10 30 3RV1. 3 S2 Up to 690 50 140 10 3RV1. 4 S3 Up to 500 Up to 690 110 150 167 167 10 30 1L1 3L2 5L3 3RV1. .. 2T1 4T2 6T3 1L1 3L2 5L3 3RV1. .. 2T1 4T2 6T3