Millet current style:
Capacity 16000mAh, priced at 129 yuan;
Capacity 10400mAh, priced at 69 yuan;
Capacity 5200mAh, priced at 49 yuan;
The latest high version of 10000mAh, priced at 149 yuan of human life coins;
16000MAh configuration
Product model: NDY-02-AL
Battery type: high quality lithium ion battery
Input voltage: DC 5.0V.
Output voltage: DC 5.1V.
Input current: 2000mA (TYP).
Output current: 2100mA (TYP).
Rated capacity: 3.75V/16000mAh (TYP).
Charging time: about 9 hours (using 5V/2A charger, standard cable). Approximately 14.5 hours (5V/1A charger, standard cable).
Note: Any port supports 5.1V/2.1A output. Both ports are output at the same time, and the maximum output is 5.1V/3.6A.
Product size: 145*60.4*22mm.
Load detection: automatic detection of load insertion and extraction safety protection This product supports input high voltage protection, input anti-reverse protection, output over-current protection, output over-voltage protection, output short-circuit protection, battery over-charge over-discharge protection, battery PTC protection, Charge/discharge temperature protection.
Protection recovery: Recharge using the charger for charging.
Charging temperature: 0 ° C - 45 ° C (TYP).
Discharge temperature: Start output temperature -10 ° C ~ +50 ° C (TYP).
Continuous output temperature: -20 ° C ~ +60 ° C (TYP).
Weight: 350g.
√ Advantages:
- low price;
- Lightweight and portable;
- Support 2A high current charging;
- All aluminum alloy casing looks good;
X disadvantages:
- Conversion efficiency is low;
- Cell insulation is not in place;
- The overcurrent protection point is set too high;
10400mAh configuration
Model: NDY-02-AD.
Battery type: High quality lithium ion battery.
Input voltage: DC 5V.
Output voltage: DC 5.1V.
Input current: 2.0A (TYP).
Output current: 2.1A (TYP).
Rated capacity: 3.6V/10400mAh (TYP).
Charging time: about 5.5 hours (using 5V/2A plug and standard data cable) for about 12 hours (using 5V/1A plug and standard data cable).
Product size: 90.5*77*21.6mm.
Load detection: Automatically detects load insertion and removal.
Protection recovery: Recharge using the charger for charging.
Charging temperature: 0 ° C - 45 ° C (TYP).
Discharge temperature start output temperature: -10 ° C ~ +50 ° C (TYP)
Continuous output temperature: -20 ° C ~ +60 ° C (TYP).
Weight: 250g.
√ Advantages:
- low price;
- Lightweight and portable;
- Support 2A high current charging;
- All aluminum alloy casing looks good;
X disadvantages:
- Conversion efficiency is low;
- Cell insulation is not in place;
- The overcurrent protection point is set too high;
5200MAh configuration
Advantages and disadvantages
√ Advantages:
- low price;
- Lightweight and portable;
- High conversion efficiency;
- Support 2A high current charging;
- All aluminum alloy casing looks good;
X disadvantages:
- Cell insulation is not in place;
- The overcurrent protection point is set too high;
- 49 yuan is very cheap but can't be bought either;
I. High & Low voltage cabinets installation of power plant
1. 10KV high voltage switch cabinet installation of power plant
2. 0.4KV low voltage switch cabinet installation of power plant
3. Installation of generator protection system, synchronization system, transformer protection, H.V. motor protection, circuit protection in a power plant.
II. Electrical configuration testing items of power plant
1. Vacuum circuit breaker insulation resistance measurement, each phase circuit resistance measurement and AC voltage withstand tests of 10KV H.V. switch cabinet.
2. DC resistance measurement of CT and PT, polarity test, ratio test, AC voltage withstand tests in 10KV H.V. switch cabinet.
3. AC voltage withstand tests for whole 10KV H.V. switch cabinet.
4. AC resonant test for 10KV H.V. electric cable.
5. DC resistance measurement of generator stator and rotor.
6. Generator stator coil insulation resistance measurement and DC voltage withstand tests.
7. Generator rotor insulation resistance measurement.
8. Generator rotor AC impedance and power loss tests.
9. No-load characteristic test of generator
10. Generator checking phase sequence (fist checking phase and second checking phase separately).
11. Generator short circuit characteristic test.
12. Measurement of residual voltage of stator after automatic magnetic blow-out and switch opening of generator.
13. Generator shaft voltage measurement.
14. Generator simulate synchronization.
15. All of the second circuit checking, measuring, switch tripping & closing tests, protection fixed value setting, protecting the STG trip test and magnetic blow-out tripping test for steam turbine and generator.
III.Electrical problem troubleshooting in power plant
Problem Description: a coal mine`s 35KV H.T. switchgear OC protection tripped suddenly in He`nan Province, it caused sudden power lost of mine fan and endanger miner safety.
Auto-reclosing via switchgears` automatic reclosing function, through analysis, the reason is a set of 3000KW generator failure. Specific reason is: When the turbo-generator was running normally, exciting voltage lost suddenly, leading phase operation happened, the generator absorbed reactive power and lead to becoming motor running. Generator protection and power plant connecting line protection did not launch. After the generator absorbed a certain value of reactive power, the 35KV H.T. switchgear`s OC protection tripped.
Investigation: generator and power plant connecting line protection setting fixed value exceed the protection fixed value of 35KV switchgear side, it lead to nearby protection did not launch and override trip when generator failure.
Electrical Cabinet Care,10Kv Electrical Cabinet Care,0.4Kv Electrical Cabinet Care,Electric Governing Reconstructing
Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be