DL/T 596-2021 in English
VALIDPreventive test code for electric power equipment
- Issued on:2021-04-26
- Implemented on:2021-10-26
- File Format:PDF
- Delivery:Via email within 10 business days
Price(USD)：
$2,470.00
$2,396.00
$2,396.00
| Standard No: | DL/T 596-2021 |
| Document status: | VALID |
| Title in English: | Preventive test code for electric power equipment |
| Title in Chinese: | 电力设备预防性试验规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 10 business days |
| Issued on: | 2021-04-26 |
| Implemented on: | 2021-10-26 |
| Superseding: |
DL/T 596-1996 Preventive Test Code for Electric Power Equipment
|
| Professional Classification: | DL-Electricity |
| Related Keywords: | equipment equipment coverage
equipment detection technology conventional power outage test add power outage test electric power equipment introduction core changes preventive test code |
| Related Topics: | prevention
Outsourcing Equipment Inspection Regulations preventive test Pre-grinding equipment "electric equipment" electric equipment preventive Preventive test of electrical equipment Rules for preventive testing of electrical equipment DL/T 596 DL/T596 DL/T 596-2021 DL/T 596-1996 Preventive test procedures for electrical equipment |
Introduction
Core changes in the standard revision
| Dimensions | DL/T 596-1996 | DL/T 596-2021 |
|---|---|---|
| Voltage level | 500kV and below | New requirements for 750kV equipment |
| Equipment coverage | 12 types of equipment | Added series compensation device and other 8 new types of equipment |
| Detection technology | Conventional power outage test | Add 5 new types of detection | such as infrared temperature measurement
Interpretation of key technical requirements
4.1 Test system architecture
Construct a three-in-one detection system of "power outage test + live detection + online monitoring":
- Power outage test: retain 27 basic tests such as DC resistance
- Live detection: add dynamic monitoring methods such as SF6 decomposition product test
- Online monitoring: clarify 6 alternative items such as core grounding current
5.1 Innovation in rotating motor testing
Take synchronous motors above 6000kW as an example:
- Insulation resistance: Epoxy powder mica insulation absorption ratio ≥1.6 (polarization index ≥2.0)
- Partial discharge: Detected by high-frequency current sensor, threshold ≤100pC
- End vibration: Amplitude ≤50μm (assessed according to GB/T 20140)
Implementation suggestions
Periodic management strategy
| Equipment type | Benchmark period | Adjustment principle |
|---|---|---|
| 750kV transformer | 3 years | Online monitoring can normally be extended by 20% |
| 220kV circuit breaker | 6 years | If it has been operated 2000 times, it should be operated in advance |
Data application guide
Establish initial value database management:
- Establish benchmark data within 1 year of commissioning of equipment above 330kV
- Abnormal judgment adopts "horizontal comparison + vertical trend" dual-dimensional analysis
- It is recommended to use winding frequency response analyzer for deformation monitoring
Sample only — not a preview of DL/T 596-2021
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