1. Chinese standard name: relay protection setting calculation software and data technical specification. English standard name: Technical specification for setting calculation software and data of relay protection. Standard status: current. Online preview. Implement information feedback. Chinese standard classification number (CCS). F International Standard Classification number (ICS).2249
2. Standard number: GB / T 14285-200 Chinese standard name: Relay protection and safety automatic device technical procedures. English standard name: Technical code for relaying protection and security automatic equipment. Standard status: current. Online preview. Implement information feedback. Chinese standard classification number (CCS). F International Standard Classification number (ICS).
3. Chinese standard name: 35kV and the following general technical requirements for standardized relay protection devices. English standard name: General specification for 35kV and below voltage standardized protection equipment. Standard status: current. Online preview. Implement information feedback. Chinese standard classification number (CCS). K International Standard Classification number (ICS).2240
4, relay protection and maintenance procedures.4 There is no loosening or false welding at the welding position of the relay lead. Clean cleaning of the equipment. Each relay shall conduct coil resistance value measurement and insulation inspection. The dynamic and static contacts of each relay contact shall have no burning flowers and deformation phenomenon, and the contact spacing shall meet the requirements of the relevant technical specifications.
5, relay protection and automatic device on-site inspection procedures.12 current differential protection (differential protection of generator and transformer) receives the relative polarity and variable ratio of each group of current loop in the protection loop. Whether the wiring of each group of current transformers is correct and whether the circuit side line is reliable.
The verification after the relay protection accident belongs to the one
1. The same data is input multiple times, and then the two batches of data are compared by the system. This verification method belongs to ().
2. Single topic selection. The verification after the relay protection accident belongs to (). Part A is check. B Check found in operation. C Supplementary calibration. Check out the answer.
3. Analysis of 25 relay protection accidents: Case 1: In a 110kV substation, when the operator modified the protection value of the main transformer, the zero sequence overvoltage protection of the main transformer mistakenly fully cut the three side switch of the main transformer. Analysis: the operator did not conscientiously implement the monitoring system in the process of modifying the fixed value on the back stage of the monitoring system, and mistakenly changed the zero-order overvoltage fixed value to 0V.------Case 2: In a 35kV substation, in the process of resuming power transmission after the annual protection inspection and pre-test, it was operated locally on the high voltage chamber switch cabinet due to the fault of the monitoring system, and the backup protection action of the main transformer lost pressure in the whole station. Analysis: 10kV line on the ground line is not removed, with the ground wire closing accident. When the "operation / maintenance" on the switch gear switches to the maintenance position, the protection is disconnected in the secondary loop. Although the line fault is protected correctly, the exit cannot trip, resulting in the backup protection of the main transformer trip.-----
4. At the end of the relay protection site verification work, the person in charge of the work should carefully do the following handover and acceptance procedures to the person in charge of duty: make verification records on the site record book of the electrical equipment maintenance site of the transformer and distribution station.
5. The calibration after the relay protection accident belongs to (). A: partial calibration B: calibration of abnormal phenomena found in operation C: Supplementary inspection is divided into inspection after device transformation, inspection after maintenance or primary replacement of equipment, and inspection after abnormal situation in operation After abnormal phenomena are found in operation, the inspection shall immediately press the accident button to stop the operation of the concentrating machine.
6,1 The verification after the relay protection accident belongs to (C). A. partial calibration B. abnormal abnormalities found in operation C. Supplementary calibration 2 All calibration work after the newly installed protection device is put into operation shall be arranged in (B). A. After 1 year B. within 1 year C. After 3 years of operation 2 The following contents not supplementary tests are (C).
7, "relay protection and power grid safety automatic device inspection procedures" test questions and answer multiple-choice questions relay protection device inspection is divided into three kinds, It is (C) A, acceptance inspection, all inspection, transmission inspection B, partial inspection, supplementary inspection, regular inspection C, acceptance inspection, periodic inspection, supplementary inspection of the periodic inspection of the relay protection device is divided into: all inspection, Partial inspection, (C) A, acceptance inspection B, post-accident inspection C, device breaker trip test after the new installation protection work shall be arranged within (B) years C B, 3 years after the following does not belong to the supplementary inspection is (C) A, maintenance or replacement of primary equipment inspection B, post-accident inspection C, using the device for circuit breaker jump, closing test group allowed by (C) method.
8. The inspection of the relay protection device is divided into three types: the acceptance inspection of the newly installed device. Periodic inspection of devices in operation (periodic inspection). Regular inspection is divided into three kinds: all inspection, part of the inspection, circuit breaker tripping test with the device. Supplementary inspection of units in operation (supplementary inspection).