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HM Launched On-Tank Reactive Vacuum OLTC HWDK

Date: 2020-04-21
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Recently, Huaming launched its on-tank reactive vacuum OLTC HWDK. It's a 3-phase on-load tap-changer, composed of one diverter switch and one tap selector, designed for large-current on-load voltage regulation in utilities and industries. 

HM Launched On-Tank Reactive Vacuum OLTC HWDKHM Launched On-Tank Reactive Vacuum OLTC HWDK



The current path during the switching sequence is shown in red.

HM Launched On-Tank Reactive Vacuum OLTC HWDK

Note: VS: Vacuum interrupter; P1, P4: Tap selector contact; P2, P3: Main contact


The technical data is as below


Type

HWDK

Max. rated through-current Ium (A)

1500

2000

Rated frequency (Hz)

50       60

Max. rated voltage tap-to-tap (V)

2000

Max. rated voltage per step (V)

1000

Rated step capacity (kVA)

3000

4000

Standard operating positions (with change-over selector)

33

33

Regulating winding section

98 effective

Short-circuit current test (kA)

Thermal (3s)

12

Dynamic (Peak)

30

Insulation to groundKV

max. continuous voltage between circuitsIEEE/CSA)(KV

72.5

Rated separate source AC withstand voltage (50Hz  1min)

140

Rated lightning impulse withstand voltage1.2/50us

400

Maximum and minimum insulation level of switch (limit range) (kV)

Rated separate source AC withstand voltage (50Hz  1min)

70

Rated lightning impulse withstand voltage1.2/50us

250

Insulation level between two taps stages (KV)

Rated separate source AC withstand voltage (50Hz  1min)

50

Rated lightning impulse withstand voltage1.2/50us

125

Mechanical life

1,500,000 operations

Vacuum contact life

600,000 operations

Maintenance interval

500,000 operations

Tap changer oil tank

Leakage test

No leakage under 0.08 MPa for 24 hrs

Withstand full vacuum ±17psi

Dimension of tap changer oil tank (in)

L×W×H

68×33×46

Weight (lb.)

3009

Filling volume of oil tank (us gal)

383





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