Anjani Power Tech

Additional Information:

• Delivery Time: 5-6weeks

Owing to our affluent industry acquaintance, we present 110V DC Alstom Auxiliary Relay. In addition, experts check these products on diverse industry parameters to ensure the sturdy nature.

• Simple and robust construction.
• High stability on external faults.
• Sensitive high speed protection on internal faults.

• Differential protection of ac machines, reactors, auto transformers and bus bars.
• Balanced and restricted earth fault protection of generators and transformer windings.
• Transverse differential protection of generators and parallel feeders.

• Adjustable setting range
• Very high drop off / pick up ratio
• Unaffected by normal variation in frequency of input voltage
• Simple and robust construction
• Positive action without chatter

• Instantaneous over: Voltage protection of generators, capaci-tors etc
• Definite time undervoltage protection of ac motors
• Automatic voltage changeover schemes and other instantane ous and definite time under voltage and overvoltage applica-tions requiring adjustable settings.

• High speed operation
• Compact and robust construction
• Positive action

• Simple and robust construction
• Positive action and high mechanical stability
• Heavy duty contact available, where required
• Slugged relays with delay on operation / reset available in ac/dc version

UNDER AND OVER VOLTAGE RELAY

Transformers are high capital assets in electrical power systems. Elimination of all electrical and mechanical stresses, although desirable to preserve transformer life, is impractical. Adaptive techniques to measure, alarm (or trip) and advise on cumulative service can help to schedule preventive maintenance before a costly failure occurs. Internal faults are a risk for all transformers, with short-circuits dissipating the highest localized energy. Unless cleared quickly, the possibility to rewind windings reduces and core damage may become irreparable.

GE's P642, P643 and P645 address all these issues, preserving service life and offering fast protection for transformer faults. A transient bias technique has been included, enhancing relay stability and CT requirements. Hosted on an advanced IED platform, the P64x incorporates differential, REF, thermal, and over fluxing protection, plus backup protection for uncleared external faults. Model variants cover two and three-winding transformers (including auto-transformers), with up to five sets of 3-phase CT inputs.

Key features:

• High stability during external fault with heavy CT saturation due to transient bias technique
• No slow-down of differential elements due to 2nd harmonic component in fault currents
• Adaptable to transformers with considerable CT mismatch between terminals – matching factor up to 20
• Current transformer supervision operates with or without voltage inputs, fast enough to prevent any spurious tripping and alarm
• 10 integrated function keys, tri-color LEDs, and graphical programmable logic permit the creation of comprehensive, tailored schemes
• No internal batteries in GE-branded models – removes a maintenance item and eases air-freight logistics
• Supports all major digital control system protocols, easing integration into DCS, SCADA and engineering workstations
• NERC CIP cybersecurity
• Binary inputs ESI48-4 EB2 compliant
• Harsh environment protection extends the life of the product

TECHNICAL SPECIFICATION

• Case 60TE/80TE
• Number of CT Inputs 18 (15 Bias, 3EF)
• Number of VT inputs 1 or 4
• Number of bias inputs (3-phase CT sets) 5
• Optically coupled digital inputs 16 - 40
• Standard relay output contacts 8 - 24
• Function keys 10
• Under voltage/Overvoltage/Residual voltage protection-Yes
• Under frequency/Over frequency protection -Yes
• Over fluxing protection 1-phase + 3-phase
• Programmable LEDs 18 tri-colour

• Single frequency measuring stage- instantaneous and definite timefor type MFVUM 12
• Two definite time frequencymeasuring stages for type MFVUM 22.
• Fully independent or differentialpick-up/drop-off operation fortype MFVUM 22.
• Wide frequency setting ranges 10.001 - 500 Hz. Site selectableunder-frequency or over-frequency mode.
• Built-in timer with wide settingrange.
• Wide operating voltage range.
• Consistent accuracy.
• Low burden.
• Positive calibrated settings bymeans of switches.
• Test facility.
• Compact design

Additional Information:

• Delivery Time: IMMEDIATE