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Functions of Siemens Siprotec 5 7SJ81 Overcurrent & Feeder Protection Relay
The SIPROTEC Compact 7SJ81 Overcurrent and Feeder Protection hand-off gives 4 low-power current transformer inputs and alternatively 3 low-power voltage transformer inputs. With a similar low-power current transformer (LPCT) a wide scope of essential appraised line flows can be covered. Objects with evaluated flows in the reach from 20 A to 2500 A can be ensured when utilizing low-power current transformers.The following low-power current transformer proportions are reasonable for the accompanying essential current working rangesHighlights-300 A/225 mV for an essential working current scope of 60 A to 630 A-600 A/225 mV for an essential working current scope of 120 A to 1250 A-1250 A/225 mV for an essential working current scope of 250 A to 2500 A-100 A/225 mV for an essential working current scope of 20 A to 200 ASIPROTEC 7SJ81 is a multi-utilitarian engine assurance transfer. It is intended for the insurance of offbeat engines, all things considered.
Functions of Siemens 7sj81relay
- DIGSI 5 allows all capacities to be arranged and consolidated as required.
- Directional and non-directional overcurrent insurance with extra capacities
- Identification of ground deficiencies of any kind in redressed or secluded electrical power frameworks utilizing the accompanying capacities: 3I0>, V0>, transient ground issue, cos φ, sin φ, dir. location of discontinuous ground issues, symphonious recognition and induction estimation
- Recognition of irregular ground deficiencies with programmed hindering of static estimating capacities, to keep away from message and shortcoming record flooding
- Curve security (note the subsequent correspondence limitations)
- Recurrence security and recurrence change insurance for load shedding applications
- Power insurance, configurable as dynamic or responsive power assurance
- Directional receptive power Undervoltage assurance (QU insurance)
- Control with switchgear interlocking insurance
- Synchrocheck
- Electrical switch disappointment insurance
- Identification of current and voltage flags up to the 50th symphonious with high exactness for chosen insurance capacities and functional estimated values
- Overvoltage and undervoltage security
The SIPROTEC 7SJ81 relay overcurrent assurance has explicitly been intended for practical and smaller security of feeders and lines in medium-voltage frameworks. SIPROTEC 5 is important for the new age of unique particular, adaptable, and wise computerized field gadgets. With separately planned equipment and programming and its superior exhibition DIGSI 5 designing apparatus, the SIPROTEC 5 item group of field gadgets are ideally suited for assurance, control, checking, and estimating applications in electrical energy frameworks. SIPROTEC 5 offers a wide item range with measured components for each application and necessity.
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