{"id":305,"date":"2020-08-18T12:47:03","date_gmt":"2020-08-18T12:47:03","guid":{"rendered":"http:\/\/www.dsgenterprisesltd.com\/product\/import-placeholder-for-1446\/"},"modified":"2020-09-12T10:22:43","modified_gmt":"2020-09-12T10:22:43","slug":"siemens-siprotec-4-siprotec-7vk61-protection-relay","status":"publish","type":"product","link":"https:\/\/dsgenterprisesltd.com\/product\/siemens-siprotec-4-siprotec-7vk61-protection-relay\/","title":{"rendered":"Siemens Siprotec 4 SIPROTEC 7VK61 Protection Relay"},"content":{"rendered":"<h1>Siemens Siprotec 4 SIPROTEC 7VK61 Protection Relay<\/h1>\n<p>The SIPROTEC 4 breaker management relay 7VK61 is a highly flexible autorecloser, synchro-check, and circuit breaker failure protection unit. This unit is used for the single and three pole auto-reclosure of a circuit-breaker after this circuit breaker has tripped due to a fault.The synchro-check function ensures that the two circuits being reconnected by closing the circuit-breaker are within a defined safe operating state before the CLOSE command is issued.The 7VK61 is also applicable as circuit breaker failure protection. A breaker failure occurs when the circuit-breaker fails to correctly open and clear the fault after single or three-pole trip commands have been issued by the protection.It is then necessary to trip the relevant busbar zone (section) to ensure fault clearance. Together with the above-mentioned protection functions, the following additional functions of the 7VK61 can be applied: end-fault protection, pole-discrepancy protection, overvoltage protection and under voltage protection. As a member of the numerical SIPROTEC 4 relay family, it also provides control and monitoring functions and therefore supports the user with regard to a cost-effective power system management.<\/p>\n<p><strong>PROTECTION FUNCTIONS<\/strong><\/p>\n<ul>\n<li>Single and\/or three-pole auto-reclosure<\/li>\n<li>Synchro-check with live\/dead line\/bus measurement<\/li>\n<li>Closing under asynchronous conditions (consideration of CB operating time)<\/li>\n<li>Circuit-breaker failure protection with two stages (single and three-pole with\/without current)<\/li>\n<li>End-fault protection<\/li>\n<li>Pole-discrepancy protection<\/li>\n<li>Overvoltage\/undervoltage protection<\/li>\n<\/ul>\n<p><strong>CONTROL FUNCTION<\/strong><\/p>\n<ul>\n<li>Commands f. ctrl. of CB and isolators<\/li>\n<\/ul>\n<p><strong>MONITORING FUNCTIONS<\/strong><\/p>\n<ul>\n<li>Operational measured values<\/li>\n<li>Self-supervision of the relay<\/li>\n<li>Event buffer and fault protocols<\/li>\n<li>Oscillographic fault recording<\/li>\n<li>Monitoring of CB auxiliary contacts<\/li>\n<li>Switching statistics<\/li>\n<\/ul>\n<p>FEATURES<\/p>\n<ul>\n<li>All functions can be used separately<\/li>\n<li>Initiation\/start by phase-segregated or 3-pole trip commands<\/li>\n<li>Auto-reclosure for max. 8 reclose cycles<\/li>\n<li>Evolving\/sequential trip recognition<\/li>\n<li>Auto-reclosure with ADT, DLC, RDT<\/li>\n<li>Synchro-check with ?V, ?? , ?f measurement<\/li>\n<li>Breaker failure protection with highly secure 2-out-of-4 current check detectors<\/li>\n<li>Breaker failure protection with short reset time and negligible overshoot time<\/li>\n<\/ul>\n<p>COMMUNICATION INTERFACES<\/p>\n<ul>\n<li>Front interface for connecting a PC<\/li>\n<li>System interface for connecting to a control system via various protocols<br \/>\n? IEC 61850 Ethernet<br \/>\n? IEC 60870-5-103 protocol<br \/>\n? PROFIBUS-FMS\/-DP<br \/>\n? DNP 3.0<\/li>\n<li>Rear-side service\/modem interface<\/li>\n<li>Time synchronization via<br \/>\n? IRIG-B or DCF77 or system interface<\/li>\n<\/ul>\n<p><a href=\"https:\/\/dsgenterprisesltd.com\/product-category\/siemens-reyrolle-numerical-relays-supplier\/siprotec-4-siemens-numerical-relays-2\/\">SIPROTEC 4<\/a> leads the way in integrating protection, control, measurement, and automation functions in one device. The homogenous system platform, the unique DIGSI 4 engineering program, and extensive experience of more than a million successfully operating devices in the field worldwide ? thanks to these unique advantages, SIPROTEC 4 enjoys top recognition among users worldwide. SIPROTEC 4 is the industry standard for digital protection technology today in all fields of application.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Siemens Siprotec 4 SIPROTEC 7VK61 Protection Relay The SIPROTEC 4 breaker management relay 7VK61 is a highly flexible autorecloser, synchro-check, and circuit breaker failure protection unit. This unit is used for the single and three pole auto-reclosure of a circuit-breaker after this circuit breaker has tripped due to a fault.The synchro-check function ensures that the 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