f Siemens Protection Relays SIPROTEC Compact Series SIPRPTEC 7SJ81- A&S Automation Co., Ltd
 
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  • A&S Automation Co., Ltd.
  • Address: 469 Xinsheng Road, Gaoxin District, Chengdu, China
  • Tel: +86-28-67198331
  • Fax: +86-28-86129221
  • Email: sensor@esmachinery.com
  • Contact Person: Ivy

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The SIPROTEC Compact 7SJ81 provides 4 low-power current transformer inputs and optionally 3 low-power voltage transformer inputs. With the same low-power current transformer (LPCT) a wide range of primary rated line currents can be covered. Objects with rated currents in the range from 20 A to 2500 A can be protected when using low-power current transformers. The following low-power current transformer ratios are suitable for the following primary current operating ranges; 300 A/225 mV for a primary operating current range of 120 A to 1250 A; 600 A/225 mV for a primary operating current range of 200 A … 3000 A; 1250 A/225 mV for a primary operating current range of 250 A to 2500 A; 100 A/225 mV for a primary operating current range of 20 A to 200 A; SIPROTEC 7SJ81 is a multi-functional motor protection relay. It is designed for protection of asynchronous motors of all sizes. The relays have all the functionality to be applied as a backup relay to a transformer differential relay. The relay provides numerous functions to respond flexibly to the system requirements and to deploy the invested capital economically. Examples for this are: exchangeable interfaces, flexible protection functions and the integrated automation level (CFC). Freely assignable LEDs and a six-line display ensure a unique and clear display of the process states. In combination with up to 9 function keys, the operating personnel can react quickly and safely in any situation.This guarantees a high operational reliability.Inputs for Low power CTs and VTs according IEC 61869-6 (formerly IEC 60044-7 and IEC 60044-8); Removable terminal blocks; Binary input thresholds settable using DIGSI (3 stages); 9 programmable function keys; 6-line display; Buffer battery exchangeable from the front; USB front port; 2 additional communication ports; integrated switch for low-cost and redundant optical Ethernet rings; Ethernet redundancy protocols RSTP, PRP and HSR for highest availability; Relay-to-relay communication through Ethernet with IEC 61850 GOOSE; Millisecond-accurate time synchronization through Ethernet with SNTP

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Siemens Protection Relays SIPROTEC Compact Series SIPRPTEC 7SJ81- A&S Automation Co., Ltd

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