China 11kv 17steps 24steps Auto Voltage Regulator for Transformer

11KV 250A 50HZ/60HZ AUTO VOLTAGE REGULATOR FOR POWER AND DISTRIBUTION TRANSFORMER

3. Technical Specification
SYTZZ-11/250-17 is designed and produced according to IEC-60214-1, the main specifications is shown by Table 1.
Table 1 SYTZZ-33/200-17 series OLTC Technical Specification

Model SYTZZ-11/250-17 max. through current 290Phase number3Wiring method End part voltage regulationMax working position number17Rated grade voltage 300Insulation
Level
(KA)Insulation grade 11Max working voltage12Industrial
test voltage 1minTo earth35Between phase35Between max. and min. 18Between neighboring contact18Shocking test (1.2/50us)75Shout circuit testThermal stability(3S)4Dynamic stability10Mechanical life (10000 times)Not less than 50Electrical lifeNot less than 5Tight testWorking pressure3x104 PaTest pressure6x104 Pa 24h without leakage Switch weight (without oil)(kg)130Oil weight filledAccording to switch heightDrying105+ 5ºC Controller fittedYK-2

4. The wiring diagram
(a ) (b)

SYTZZ-11/250-17
5. Operation Condition
5.1 Service ambient air temperature range of tap changer is -25ºC ~ +40ºC,Relative humidity is less then 85%.
5.2 Service temperature range of the tap changer in oil is -25ºC ~ +100ºC.
5.3 Vertical inclination of OLTC should not be over 2% when it is mounted onto the transformer.
5.4 OLTC should be operated in the place without heavy dusty and any corrosive or explosive gas.
6. Automatic Voltage Regulator
SYTZZ-11/250-17 OLTC is equipped with automatic voltage regulator YK-2. please refer to appendix for YK-2 automatic voltage regulator circuit diagram.
7. Special Design.
Special design will be provided according to the requirements of the customer. The OLTC can be equipped with temperature sensor for cold region application and a manual operation mechanism with DC power supply to YK-2 AVR for position display during installation.