11kv/27kv/38kv 50Hz/60Hz on Load Tap Changer for Power Automatic Transformer

• Application: Power, Rectifier, Power Transformer
• Phase: Three
• Certification: ISO9001
• Usage: Single-phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer
• Specification: 15KV/27KV/38KV, 50HZ/60HZ,
• Trademark: HEMG
• Model NO.: SYJZZ
• Origin: China
• Production Capacity: 10000

Product Description

1. General

Type SYTZZ-33/200-17 is an in-tank mounting on-load tap changer, it applies resistance transition Principle. The OLTC is a selector switch type with an oil compartment to separate OLTC oil from transformer oil . there is a motor drive mechanism in the top of OLTC and the motor is controlled by Yk-2 controller . The OLTC has the advantages of simple structure and easy maintenance.

3. 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
Rated voltage(KV)			33
Rated through current(A)			200
Rated frequency(HZ)			50
Maximum through current (A)			240
Phase number			3
Wiring method			End part voltage regulation
Max working position number			17
Maximum step voltage (V)			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		3×10^4Pa
	Test pressure		6×10^4Pa     24h without leakage
Switch weight (without oil)	(kg)		130
Oil weight filled			According to switch height
Drying			105+ 5ºC
Controller fitted			YK-2

 

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.