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HM New Reactive LTC Launched to the Market

Date: 2022-03-30
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Huaming has launched several types of reactive LTC to amplify its products. Today we’re going to introduce some of them.

 

First, the HMDK series, which is externally mounted, which is installed in the transformer external oil tank by means of aluminum brackets at the tail of the tap-changer. It is suitable for 60Hz single-phase oil-immersed voltage regulating transformer: linear regulation 17 positions as well as reversing & coarse and fine regulation 33 positions. The working temperature in oil is between -25℃ and 80℃.

    HM New Reactive LTC Launched to the Market          HM New Reactive LTC Launched to the Market

Model

HMDK 300A

HMDK 640A

low voltage

HMDK 640A

high voltage

Rated currentA

300

640

640

Max. rated currentA

480

668

668

Short circuitkA

2Srsm

7.5

16

16

0.8Srsm

12

20

20

Peak

27.12

45.2

45.2

Rated voltagekV

27.6

27.6

35

Step voltage (V)

172.5

172.5

219

Insulation

BIL

1.2/50μs

150KV

150KV

200KV

Power frequency

50Hz1min

50KV

50KV

85KV

Phase

Single

Frequency

60Hz

Max. positions

33

Mechanical life

No less than 2,000,000 operations

Electrical life

No less than 180,000 operations

Working temperature

-30℃90℃

Drying temperature

120℃~125℃

Time interval between 2 switchings

1s

Weightkg

22.5

33

36

Motor parameters

Rated voltageV

115

20

115

Nominal output power (W)

20

20

20

FrequencyHz

60/50

60/50

60/50

CurrentA

0.58

0.58

0.58

Second, the newly designed HFDK. Different from current similar products on the market, which use chain to drive, lacking stability. HFDK innovatively adopts gears as tap-changer drive and double-spring & double-locking mechanism as the switching drive, making it compact, reliable and longer life.

HM New Reactive LTC Launched to the Market


Rated currentA

300

Max. rated currentA

480

Short circuitkA

2Srsm

7.5

0.8Srsm

12

Peak

27.12

Rated voltagekV

Highest

27.6

Lowest

2.5

Step voltageV

Rated voltage’s 0.625%

Insulation

BIL

1.2/50μs

13.8kV

80kV

13.8kV

150kV

Power frequency

1min

50kV

Phase

Single

Frequency

60Hz

Max. positions

33

Mechanical life

不低于200万次

Electrical life

不低于18万次

Working temperature

-30℃90℃

Drying temperature

125℃/16h

Time interval between 2 switchings

1s

Weightkg

32

Motor parameters

Nominal output power (W)

58.7

FrequencyHz

60

CurrentA

0.46


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