Siemens delivers high- performance with binary powered protection relay
Siemens is expanding its family of Reyrolle protection bias with the launch of the 7SR46. Completing an expansive portfolio of protection relays for distribution and artificial grids, the primary operation for the Reyrolle 7SR46 is to give overcurrent and earth fault protection in medium voltage distribution motor stations. Mounted in a ring main unit, the protection device detects string faults on the network and operates snappily to dissociate the fault. The 7SR46 binary powered protection relay is to be showcased at Enlit Europe, taking place in Frankfurt from November 29 to December 1.
Due to their frequently remote position, secondary substations don’t always have a battery to give power to electronic outfit similar as protection relays. With this in mind, the 7SR46 has been designed to operate using power from current mills( CTs) when the line is live. Addressing scripts whereby the line is switched off and there’s formerly a fault on the line, or the earth connection has been inaptly left connected, the 7SR46 has been specifically designed to power up snappily to give protection in similar circumstances.
furnishing fresh inflexibility and security, the 7SR46 is binary powered to allow a connection to an supplementary battery force. With power available from the current mills and an supplementary power force, this point provides redundancy in case the battery fails.
The 7SR46 device has a compact( H104 mm x W185 mm x D79 mm), moulded quadrangle. The front of the device includes an easy- to- use display and push buttons that can be used to programme the relay and view fault records and instrumentation. Four LEDs give information on the relay’s status and a mechanical trip flag is also available. The front of the device features a USB communication harborage for connecting to a PC and can power the relay when no other power source is available. The USB harborage also allows draw and play connection to Reydisp to programme the device and download fault and event information. The integrated battery allows druggies to program the device and to download event and fault records without a connected power force. The reverse of the device features stoner-friendly divisible outstations for RS485 communication interface( Modbus RTU and IEC 60870- 103), supplementary power force, double inputs, double labors, external trip inauguration input, external flag affair and a palpitation affair. The CTs( of type 5P80) are connected with a secure ring crimp. A clear connection illustration is also located on the reverse of the relay to prop the stoner.
Clinging to strict product testing norms, the 7SR46 is impeccably suited for use in distribution motor stations where there isn’t a circuit swell trip force. The device features a palpitation affair that can spark a low power trip coil to trip the circuit swell. Available at a largely competitive price point, the 7SR46 provides comprehensive and dependable protection for medium voltage operations.
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