Differential Protential Relay.ppt
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This document provides an overview of differential protection relays for transformers. It discusses the inputs, purpose, and components (SIPOC) of differential relays. The document defines differential protection as comparing electrical quantities from two circuits to detect faults within a protected zone. It describes the standard operating procedures, including proper relay connections and avoiding bypassing. The document outlines four types of differential relays and provides examples of current differential relays. It discusses environmental and safety aspects, as well as troubleshooting procedures for when faults occur.
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A DAPTIVE S UPPLY V OLTAGE M ANAGEMENT F OR L OW P OWER L OGIC C IRCU...
With the rise in demand of portable hand held devic
es and with the rise in application of wireless sen
sor
networks and RFID reduction of total power consumpt
ion has become a necessity. To save power we
operate the logic circuitry of our devices at sub-t
hreshold. In sub-threshold the drain current is
exponentially dependent on the threshold voltage he
nce the threshold variation causes profound variati
on
of I
ON
and I
OFF
the ratio of which affect the speed of a circuit d
rastically. So to mitigate this problem we
present a adaptive power management circuit which w
ill determine the minimum required supply voltage
to meet the timing requirement. Also to reduce the
power overhead and avoid bulky coil and EMI noise
we used the switch capacitor power regulator to reg
ulate and manage power instead of linear dropout
(LDO) and Inductor base switch mode power converter
Generator protection by bhushan kumbhalkar
Main equipment in the power plant is Generator. It's cost is much higher than any other equipment so we will have to protect the generator from all the possible faults and errors.
7PG2111 Solkor Relay
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- 1. 1 DIFFERENTIAL PROTECTION RELAY OF TRANSFORMERS Presentation by, M.Sankar
- 2. INTRODUCTION
- 3. SIPOC SI – Input supply of the relay P – Detection of faults O – Healthy of the equipment C – Electrical equipments
- 4. 4 DIFFERENTIAL PROTECTION RELAY Differential Relay is relay that operates in the phase difference of two or more identical electrical quantities exceeds a predetermined amount. It works on the principle of comparison between the phase angle and magnitude of two or more similar electrical quantities. Comparing the two electrical quantities in a circuit using differential relay is simple in applications and positive in action
- 5. 5 STANDARD OPERATING PROCEDURE DO’S Differential protection relay provides unit protection the protected zone is exactly known by the location of current and potential transformers. The phase difference is achieved by suitable connections of secondaries of CT’s and PT’s.
- 6. 6 DONT’s Relay connection without earthing Working without proper tools Relay byepass
- 7. 7 Types of Differential Relay Differential Relay is mainly classified in to four different categories Current Differential Relay Induction type Differential Relay Biased or Percentage Differential Relay Voltage balanced Differential Relay
- 16. 16 Environmental Aspects Damaged or repair differential relay to be disposed through e-waste
- 17. 17 Safety Aspects The Advantage of this relay is that it is less likely to operate incorrectly than a differentially connected over-current relay when a short circuit occurs external to the protected zone. This relay has unique advantage of reducing the time of operation to a minimum for fault very close to the source where the fault current is the greatest.
- 18. 18 Troubleshooting When the fault occurs in the protected zone, the current in the two primaries will differ from one another, and so voltage induced in the secondaries of CT’s will differ and circulating current will flow through the operating coils of the relays.
- 21. Specific power consumption SPC (KWh / tonne of product) Departments RDH CLO2 Bag Pulp SRP PM 1-4 PM 5 CPP WTP Mill wide SPC (Achieved During) 2018-2019 341 239 583 427 699 756 26.2 0.82 1548 (Achieved During) 2019-2020 339 481 566 417 735 785 27.5 0.76 1588 Norm (2020-2021) 291 600 553 370 718 670 20.4 0.75 1471 Q1 (2020-2021) 330 660 488 455 717 748 26.8 0.75 1547 July’2020 332 710 711 501 723 731 26 0.77 1583 Aug’2020 319 652 539 480 701 687 26 0.73 1470 Sep’2020 up to 28.09.2020 335 699 662 495 585 786 27 0.76 1525 Apr ’20 to Sep 28.09.2020 331 673 547 473 692 734 26.6 0.75 1540
- 22. 22