About  
News News Details

HM Linear Type DETC ZWC

Date: 2020-04-21
Views: 63

This ZWC de-energized tap-changer is suitable for oil-immersed power transformers and special transformers, such as furnace or rectifier transformer with a rated frequency of 50 or 60 Hz, a maximum equipment voltage of 145kV and maximum rated current of 1000A. Tap changing takes place when the transformer is de-energized, so as to change the transformer ratio and stabilize the output voltage.

HM Linear Type DETC ZWC

ZWC tap-changer

HM Linear Type DETC ZWC

Drive mechanism


ZWC is of a split structure and consists of two parts: the body and the drive mechanism. The transformer manufacturer is responsible for connecting these two. It is of linear type and equipped with two insulating support plates as a frame. It is used in power transformers and large-scale distribution transformers. It is installed in the space between the windings and the tank wall. It benefits from a compact size and reduced tapping lead. The tap changer operation is controlled by a Geneva wheel to ensure accurate positioning of the moving and fixed contacts. The appropriate connection between the tap changer contacts is done through a classic clamping-type floating point method to meet the the current carrying capacity.


1

Tap-changer Model

ZWCI 500

ZWCI 1000

2

Phases

Single phase

3

Rated frequencyHz

50/60

4

Rated through currentA

500

1000

5

Short-circuit current testkA

Thermal3s

8

15

Dynamic (Peak)

12.5

25

6

Insulation to ground

VoltagekV

138

138

The highest voltage for equipmentkV

145

145

Rated separate source AC withstand voltage1min)(kV

To ground

275

275

Between contact

50 with 50mm spacing

50 with 50mm spacing

80 with 80mm spacing

80 with 80mm spacing

Between max. & min. taps of the same phase

100

100

Rated lightning impulse withstand voltage1.2/50μs)(kV

To ground

650

650

Between contact

140 with 50mm spacing

140 with 50mm spacing

225 with 80mm spacing

225 with 80mm spacing

Between max. & min. taps of the same phase

250

250

7

Drying temperature

Vacuum drying 110℃, Vapor phase drying 125℃

8

Connection mode

Linear

9

Operating method

Side manual operation

10

Max. operating positions

5

11

Contact resistance between fixed and moving contacts

≤350μΩ

12

Partial dischargepC

≤50

13

Leakage test

No leakage under 6×104 Pa for 24h

14

Mechanical life

More than 10,000 operations

15

Temperature rise of contact at 120% of rated

Below 15K (in oil)



Close】【Print
News
Copyright © 2005 - 2013 Shanghai Huaming Power Equipment
犀牛云提供企业云服务
Address: No.977, Tongpu Road, Shanghai, 200333, China 
Tel: 86 21 5270 8966
E-mail: export@huaming.com
邮编:330520