33kv 17steps 250A Auto Voltage Regulator for Power and Distribution Transformer

Product Description

33KV 250A 50HZ/60HZ AUTO VOLTAGE REGULATOR FOR POWER AND DISTRIBUTION TRANSFORMER
Technical Specification
SYTZZ-33/200-17 is designed and produced according to IEC-60214-1(2003), the main specifications is shown by Table 1.
Table 1 SYTZZ-33/200-17 series OLTC Technical Specification

Model			SYTZZ-33/200-17
max. through current			240
Phase number			3
Wiring method			End part voltage regulation
Max working position number			17
Rated grade voltage			600
Insulation Level (KA)	Insulation grade		33
	Max working voltage		36
	Industrial test voltage 1min	To earth	85
		Between phase	85
		Between max. and min.	36
		Between neighboring contact	36
	Shocking test (1.2/50us)		200
Shout circuit test	Thermal stability(3S)		4
	Dynamic stability		10
Mechanical life	(10000 times)		Not less than 50
Electrical life			Not less than 5
Tight test	Working pressure		3×104 Pa
	Test pressure		6×104 Pa 24h without leakage
Switch weight (without oil)	(kg)		130
Oil weight filled			According to switch height
Drying			105+ 5ºC
Controller fitted			YK-2

4. The wiring diagram

(a ) (b)

SYTZZ-33/200-17
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-33/200-17 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.

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