4/2/2008 3:33 PM | |
Posts: 467 Rating: (59)
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Hi Petros, For some information about the breakers please kindly check the attached pdf. Technical data is given on page 2/42, the characteristics are shown on page 2/22. The 3VN (complete order-no. should be 3VN3000-0HM00) is equipped with an instantaneous overcurrent release only, fixed to 12x In (192 A). The 3VE (should be a 3VE3000-2PA00) is equipped with an instantaneous and a thermally delayed overcurrent release. The thermally delayed release is designed for motor protection (tripping at 6x In after 10 seconds). This means that on a blocked rotor - causing a current of e. g. 60 A - the 3VN will not trip and the 3VE will trip after about 1 minute. In your arrangement with the 3VE and the 3VN downstream there is no thermal protection which meets the motor current. To use the a. m. breakers for 415 V is no problem. AttachmentNS1_1989_2.pdf (784 Downloads) |
2/16/2017 12:47 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by PATRI is split to a separate thread with the subject short-circuit breaking capacity at AC 500 V (Icu) and the I2t values diagram of the circuit breaker 3VN3. Best regards |
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