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De-energized tap changer

BFY type oil-immersed load break switch

On load tap changer

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Single-phase bar-type tap changers (110 kV and below)

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无励磁分接开关

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Product Details

This switch consists of a switching section and an operating rotary mechanism. It is suitable for oil-immersed power transformers with frequencies of 50 or 60 Hz, maximum voltages of 40.5 kV or 126 kV, and rated currents ranging from 200 to 1500 A. The switch is mounted on the transformer tank or the tank cover and is used for tap changing under no‑excitation conditions.

WDT linear single-phase de-energized bar tap-changer WDT I linear single-phase de-energized bar tap-changer

Type of tap-changer and installation size chart

Switch model
Type of tap-changer 		Rated current
(A)
Rated current(A) 		Maximum Equipment Voltage (kV)
Highest voltage for equipment (kV) 		Voltage regulation range
Range of voltage regulation 		Number of phases
Number of phases 		Pressure-regulating section
Regulating position 		Installation dimensions (mm)
Install dimension (mm) 		Hatch Opening (mm)
Holes on tank cover (mm)
L L1 L2 L3 n
WDTⅠ200~800/40.5-3×3 200, 400
500, 630
800		 40.5 ±5% 1 Linear modulation
Linear voltage
regulating 		744 144 80 170 2 Φ80
WDTⅠ200~800/40.5-5×5 ±2×2.5% 888 288 80 170 4
WDTⅠ200~800/40.5-7×7 ±3×2% 1032 432 80 170 6
WDTⅠ200~800/40.5-9×9 ±4×1.25% 1196 576 100 170 8

WDTII series de-energized tap-changer (200~800A) WDT II series de-energized tap-changer

Type of tap-changer and installation size chart

Switch model
Type of tap changer 		Rated Current (A)
Rated current(A) 		Maximum Equipment Voltage (kV)
Highest voltage for equipment (kV) 		Voltage regulation range
Range of voltage regulation 		Number of phases
Number of phases 		Pressure-regulating section
Regulating position 		Installation dimensions (mm)
Install dimension (mm) 		Hatch Opening (mm)
Holes on tank cover (mm)
L L1 L2 H H1 ϕ D      
WDT II 1000~1500/40.5-4 × 3 1000, 1250, 1500 40.5 ±5% 1 Central region
Middle part 		776 516 72 103 44.5 φ173 φ80  
WDT II 1000~1500/40.5-6 × 5 ±2 × 2.5% 920 660 72  
WDT II 1000~1500/40.5-8 × 7 ±3 × 2% 1064 804 72  
WDT II 1000~1500/40.5-10 × 9 ±4 × 1.25% 1208 948 72  
WDT II 1000~1500/126-4 × 3 126 ±5% 848 588 96  
WDT II 1000~1500/126-6 × 5 ±2 × 2.5% 1040 780 96  
WDT II 1000~1500/126-8 × 7 ±3 × 2% 1232 972 96  

WDTII series de-energized tap-changer (1000~1500A) WDT II series de-energized tap-changer

Lead’s section and length of the bar switch

Rated current (A) Lead’s section mm² Lead’s length (mm)
200 70 700
400 150
630 185
800 240
1000 (double leads) double leads 185
1250 (double leads) double leads 185
1500 (double leads) double leads 240

Type of tap-changer and installation size chart

Switch model
Type of tap-changer 		Rated current
(A)
Rated current(A) 		Maximum equipment voltage
(kV)
Highest voltage for equipment (kV) 		Voltage regulation range
Range of voltage regulation 		Number of phases
Number of phases 		Pressure-regulating section
Regulating position 		Installation dimensions (mm)
Install dimension (mm) 		Hatch opening
(mm)
Holes on tank cover (mm)
L L1 L2 H H1 ΦD      
WDT II 200~400/40.5-4 × 3 200, 400 40.5 ± 5% 1 Central region
Middle part 		656 396 72 73.5 24.5 Φ107 Φ80  
WDT II 630~800/40.5-4 × 3 630, 800 100 34 Φ127  
WDT II 200~400/40.5-6 × 5 200, 400 ± 2 × 2.5% 800 540 72 73.5 24.5 Φ107  
WDT II 630~800/40.5-6 × 5 630, 800 100 34 Φ127  
WDT II 200~400/40.5-8 × 7 200, 400 ± 3 × 2% 944 684 72 73.5 24.5 Φ107  
WDT II 630~800/40.5-8 × 7 630, 800 100 34 Φ127  
WDT II 200~400/40.5-10 × 9 200, 400 ± 4 × 1.25% 1088 828 72 73.5 24.5 Φ107  
WDT II 630~800/40.5-10 × 9 630, 800 100 34 Φ127  
WDT II 200~400/126-4 × 3 200, 400 126 ± 5% 728 468 96 73.5 24.5 Φ107  
WDT II 630~800/126-4 × 3 630, 800 100 34 Φ127  
WDT II 200~400/126-6 × 5 200, 400 ± 2 × 2.5% 920 660 96 73.5 24.5 Φ107  
WDT II 630~800/126-6 × 5 630, 800 100 34 Φ127  
WDT II 200~400/126-8 × 7 200, 400 ± 3 × 2% 1112 852 96 73.5 24.5 Φ107  
WDT II 630~800/126-8 × 7 630, 800 100 34 Φ127  
WDT II 200~400/126-10 × 9 200, 400 ± 4 × 1.25% 1304 1044 96 73.5 24.5 Φ107  
WDT II 630~800/126-10 × 9 630, 800 100 34 Φ127  

The control lever is 1 meter long.
If customers have any special requirements, please specify them when placing your order.
If the customer has some special requirements, please detailed in ordering.

W(D+L)TII series de-energized strip tap-changer (vertical)

Type of tap-changer and installation size chart

Switch model
Type of tap-changer 		Rated Current (A)
Rated current 		Maximum Equipment Voltage (kV)
Highest voltage for equipment (kV) 		Voltage regulation range
Range of voltage regulation 		Number of phases
Number of phases 		Installation dimensions (mm)
Install dimension (mm) 		Hatch Opening (mm)  
Holes on tank cover (mm)
L L1 L2 L3 L4 H H1 ΦD  
W(D+L)T Ⅱ 200/40.5-4 × 3AL 200 40.5 ± 5% 1+2 584 324 48 998 324 68.5 24.5 Φ107 Φ80
W(D+L)T Ⅱ 200/40.5-6 × 5AL 200 ± 2 × 2.5% 680 420 48 1190 420 68.5 24.5 Φ107
W(D+L)T Ⅱ 200/40.5-8 × 7AL 200 ± 3 × 2% 776 516 48 1382 516 68.5 24.5 Φ107
W(D+L)T Ⅱ 200/126-4 × 3AL 200 126 ± 5% 728 468 96 1416 533 68.5 24.5 Φ107
W(D+L)T Ⅱ 200/126-6 × 5AL 200 ± 2 × 2.5% 920 660 96 1800 725 68.5 24.5 Φ107
W(D+L)T Ⅱ 200/126-8 × 7AL 200 ± 3 × 2% 1112 852 96 2184 917 68.5 24.5 Φ107

The distribution lead has a cross-sectional area of 70 mm² and a length of 700 mm. For the 35 kV lead, the single-sided insulation thickness is 3 mm; for the 110 kV lead, it is 6 mm.
Standard lead section is 70mm²,700mm long. 35kv lead is packed with insulation paper 3mm thickness,110kv with thickness of 6mm.

Keywords:

Single-phase bar-type tap changers (110 kV and below)

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