SZ11 Oil immersed on load tap changer transformer

Model: SZ11 series
Rated capacity: 6300kVA
Voltage ratio: 35/0.4kV
Connection group: Dyn11/Yyn0
No load loss: –W
Load loss: –W
Short circuit impedance: 5%
Frequency: 50Hz
Technical standard: GB 20052-2020
Quality standard: ISO 9001:2015; ISO 14001:2015

sales@drbyq.com

SZ11 transformer refers to an oil immersed on load tap changer, where S is three-phase, Z is on load tap changer, 11 is the performance level code for the transformer, M represents fully sealed, and kva represents the rated capacity of the transformer. A transformer that can complete tap voltage switching during load operation is called an on load tap changer transformer.

-The biggest advantage of on load tap changers is the ability to adjust voltage with load without power outages; However, typical no-load tap changers require manual voltage adjustment after a power outage;

-From the perspective of selection, if the power supply voltage and load in your area are unstable, and you have high requirements for voltage quality and need to adjust the voltage frequently, you should choose on load tap changer transformers;

-From a reliability perspective, if your production process is continuous and there are voltage deviations, using an on load tap changer will improve the reliability of power supply;

-The regulating joint of the on load regulating transformer uses a circuit breaker, which can disconnect the current and arc generated by each tap in the regulating process, so the on load regulating transformer can regulate voltage under load.

1. Quality Management System ISO 9001: 2015

The operation of the entire Dongrun Electric system is strictly controlled and managed. This ensures the quality of the product at all stages, from receiving customer requirements to design, materials, production, installation, testing, packaging, delivery, and after-sales, all of which are operated under a strict and tight process.

2. Environmental Management ISO 14001: 2015

Dongrun Electric took the lead in applying the ISO 14001: 2015 environmental management system. The implementation of this process demonstrates Dongrun’s responsibility to a wide range of customers. Dongrun is committed to providing the most environmentally friendly high-quality technical products.

3. Certification Certificate ISO / IEC 17025: 2017

The ISO / IEC 17025: 2017 certification confirms that Dongrun’s technical quality meets the requirements of all specific international testing and calibration laboratory standards. All Dongrun products are fully tested in qualified laboratories before leaving the factory to ensure stable quality and provide customers with absolute peace of mind.