Residual Winding 35kv Full Operation Mode Voltage Transformer

• Application: Instrument
• Type: Voltage Transformer
• Phase: Single
• Model NO.: JDZXW-35 single phase
• Operation Condition: Indoor
• Usage: Measurement
• Winding Form: Single Layer & Tightly Wound Type
• Insulating Medium: Epoxy Resin
• Installation: Strut Type
• Magnetic Circuit Structure: Single Stage Type
• Voltage Transformation Principle: Electromagnetic Type
• Rated Current: 630A
• Rated Frequency: 50Hz
• Rated Voltage: 12kv
• Transport Package: Wood/Boxes
• Trademark: DAHU
• Origin: Made in China
• HS Code: 8504311000
• Production Capacity: 10000PCS/Per Month

Product Description

Outdoor Potential Transformer (PT)
Definition and Role: Voltage transformer (PT) is mainly used to convert high voltage into low voltage (usually 100V) suitable for instruments or relays, for measuring line voltage, power and electrical energy, or for protecting valuable equipment in the line in case of line failure.

Structure: PT consists of primary winding, secondary winding, iron core terminal and insulation support.
Working Principle: The working principle of PT is similar to that of ordinary transformer with no-load condition, which realizes voltage transformation by changing the ratio of winding turns.

Technical parameters: in the 110kV and above voltage level system, PT usually has two secondary windings, rated phase main secondary winding voltage is 100/31/2V.

Step-down transformer
Definition and function: Step-down transformers are used to reduce high voltage to a voltage level suitable for the safe use of the consumer, e.g. to reduce a voltage of more than 100,000V to a three-phase, four-wire system of 380V.

Technical parameters: The technical parameters of step-down transformer include rated capacity, rated voltage, no-load loss, no-load current, short-circuit loss and so on. For example, the no-load loss of S9-M-800/6 step-down transformer is 1400W, load loss is 7500W, no-load current is 0.8% and impedance voltage is 4%.

PT and VT (voltage transformer)
PT (Voltage Transformer): Used to convert high voltage to low voltage for measurement and protection systems.

VT (Voltage Transformer): Similar in function to the PT, also used for voltage conversion, but specific models and parameters may differ.

The above information provides the basic concepts and some technical parameters of outdoor potential transformers (PTs), step-down transformers, and PTs and VTs. These devices play an important role in the power system to ensure effective voltage transformation and stable operation of the power system.


General

This type of voltage transformer adopts epoxy-resin vacuum casting and a fully closed single-phase structure for indoor use, is applicable for power systems of rated frequency 50Hz or 60Hz and rated voltage up to and including 10kV, used for electric energy metering and voltage measurement.
It complies with the standards GB 20840.1-2010 Instrument transformers-Part1:General requirements, GB 20840.3-2013 Instrument transformers-Part3:Additional requirements for inductive voltage transformers, and JJG314-2010 Instrument Voltage Transformers.


Use environment 

1. Altitude: should not exceed 1000m
2. Ambient temperature:-5ºC~+40ºC
3. Air relative site: indoor.

Technical parameter

1. Insulation level:12/42/75kV
2. Power factor:cosφ=0.8(lag)
3. Rated secondary current: 5A or 1A
4. Rated frequency:50Hz or 60Hz
5. Weight: 21.5kg

Technical ratio

Rated voltage ratio(kV)	Rated secondary output(VA)				Max.output(VA)	Rated insulation level(kV)	Notes
	02	0.5	1 level	2 level
3000/100	15	30	60	150	200	3.6/25/40	Same as "RZL"
6000/100						7.2/32/60
10000/100						12/42/75