Case Studies

There are total 2 sets of 1250KG load elevators in the office building, these two elevators work very hard at rush hours and voltage drop to 380V-10% when the elevator reach to more than 8 floors. Therefore it seriously affect the normal operation of elevators and normal electricity supply to the building.

Configured SBW-DT-100KVA elevator dedicated regulator for each elevator, input voltage range designed to 380V ± 20%, the standard output voltage is 380V ± 3%, the main circuit to start installation of instantaneous current-lock adjustment controller, and with overvoltage, under-voltage, over-current, overload short circuit and reverse the same lack of protection.

Configured the power supply, the elevator drop problem has been effectively addressed to ensure the normal supply of office building.

Shanghai Metro Line 2 locomotive power supply low voltage power supply system.

Installed a F-class transformer with insulation temperature 155 ℃, input voltage optional 360V,380V,400V, wiring △ / Y0, enter △ wiring can effectively suppress No. 3 harmonic impact to the load on the system, output voltage 3-phase 200V which can provide system power supply voltage, band shell protection and equipped with automatic temperature-controlled cooling device, chassis at the bottom and around the installation of shock absorbers, case protection grade IP21.

Ensured that the output voltage security after the isolation transformer configured, isolation cooling system allows effective control of temperature and shock absorbers makes transformers in motion state is stable and reliable operation.

The voltage standard for green supply is 400V for Heilongjiang Daily, but in the winter or at night it will increase to 410V. The newspaper printing systems for the electricity need to provide a stable standard 380V and power protection.

According to the newspaper electricity system analysis software, printing equipment, a total capacity of 300KW, office, lighting and central air-conditioning a total of about 120KW, standby 200KW, recommended brush design SBW compensated voltage regulator, the design capacity of 800KVA. Design input regulator range 380V ± 15%, the output accuracy of 1-5% adjustable, factory default 3%. Equipped with overvoltage, undervoltage, overcurrent, phase sequence, wrong phase, machine limit such protection, to ensure system security and stability of power supply.

Regulated power supply, the voltage is too high to be an effective solution to the problem, ensuring the normal electric power supply system Daily, the user is still in use from 2003 onwards have been very good results.