Online Inquiry Product Details
Non‑excited tubular and drum‑type tap changers (WDG series, WDG+WLG series, WSG series) are rated for voltages of 110 kV or less (with a maximum equipment voltage of 126 kV) and rated currents of 4,000 A or less. They offer three‑phase interlocked operation, 1+2‑phase operation, and single‑phase operation, with actuation methods including direct operation from the tank cover or bottom, side‑wall mounting, or interlocked operation.
Three-phases linear voltage-regulating(I、)pipe-form (G)vertical tap-changer(250~800A)
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) Install dimension (mm) |
|||||
| H | H1 | H2 | H3 | Φd1 | Φd2 | ||||
| WSG | 250–630/40.5 – 3 × 3 WSG | 250–630/40.5 – 5 × 5 WSG | △ 250–630/40.5 – 3 × 3 WSG | △ 250–630/40.5 – 5 × 5 |
250 400 500 630 |
40.5 | 3, 5 | 250 | 260 | 950 | 1050 | 170 | 186 |
| WSG | 250–630/40.5 – 7 × 7 WSG | △ 250–630/40.5 – 7 × 7 |
7 | 220 | 237 | ||||||
| WSG | 250–630/72.5-126 – 3 × 3 WSG | 250–630/72.5-126 – 5 × 5 |
72.5, 126 | 3, 5 | 300 | 260 | 1050 | 1250 | 190 | 207 | |
| WSG | 800/40.5 – 3 × 3 WSG | 800/40.5 – 5 × 5 WSG | △ 800/40.5 – 3 × 3 WSG | △ 800/40.5 – 5 × 5 |
800 | 40.5 | 350 | 265 | 1200 | 1300 | 170 | 186 | |
| WSG | 800/40.5 – 7 × 7 WSG | △ 800/40.5 – 7 × 7 |
7 | 220 | 237 | ||||||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer's requests.
2. When the customers choose the Floor-form fixing mode, please add the suffix E as a mark.
Three-phases linear voltage-regulating (I、 I )pipe-form(G)vertical tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimension (mm) | |||||||||
| H | H1 | H2 | H3 | H4 | H5 | Φd | Φd1 | Φd2 | |||||
| WSG | 1000/40.5 – 3 × 3 WSG | 1000/40.5 – 5 × 5 WSG | △ 1000/40.5 – 3 × 3 WSG | △ 1000/40.5 – 5 × 5 |
1000 | 40.5 | 3, 5 | 350 | 265 | 75 | 35 | 1200 | 1300 | 18 | 170 | 186 | |
| WSG | 1000/40.5 – 7 × 7 WSG | △ 1000/40.5 – 7 × 7 |
7 | 220 | 237 | ||||||||||
| WSG | 1250/40.5 – 3 × 3 WSG | 1250/40.5 – 5 × 5 WSG | △ 1250/40.5 – 3 × 3 WSG | △ 1250/40.5 – 5 × 5 |
1250 | 3, 5 | 400 | 300 | 75 | 60 | 1400 | 1500 | 22 | 190 | 207 | ||
| WSG | 1600/40.5 – 3 × 3 WSG | 1600/40.5 – 5 × 5 WSG | △ 1600/40.5 – 3 × 3 WSG | △ 1600/40.5 – 5 × 5 |
1600 | 210 | 227 | ||||||||||
| WSG | 2000/40.5 – 3 × 3 WSG | 2000/40.5 – 5 × 5 WSG | △ 2000/40.5 – 3 × 3 WSG | △ 2000/40.5 – 5 × 5 |
2000 | 250 | 267 | ||||||||||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer's requests.
2. When the customers choose the Floor-form fixing mode, please add the suffix E as a mark.
1+2-phase vertical linear voltage-regulating (I, |) pipe-form (G) tap-changer (250~800A) "1+2" phases linear voltage-regulating (I, I) pipe-form (G) vertical tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer | Rated current (A) | Highest voltage (kV) | Tap position number | Installation dimensions (mm) | Install dimension (mm) | ||||
| H | H1 | H2 | Φd1 | Φd2 | |||||
| WDG | 250–630/40.5 – 3 × 3 WDG | 250–630/40.5 – 5 × 5 WDG | △ 250–630/40.5 – 3 × 3 WDG | △ 250–630/40.5 – 5 × 5 |
250 400 500 630 |
40.5 | 3, 5 | — | 260 | 610 | 170 | 186 | |
| WLG | 250–630/40.5 – 3 × 3 WLG | 250–630/40.5 – 5 × 5 WLG | △ 250–630/40.5 – 3 × 3 WLG | △ 250–630/40.5 – 5 × 5 |
250 | 260 | 700 | ||||||
| WDG | 250–630/40.5 – 7 × 7 WDG | △ 250–630/40.5 – 7 × 7 |
7 | — | 260 | 610 | 220 | 237 | |||
| WLG | 250–630/40.5 – 7 × 7 WLG | △ 250–630/40.5 – 7 × 7 |
250 | 260 | 700 | ||||||
| WDG | 250–630/72.5–126 – 3 × 3 WDG | 250–630/72.5–126 – 5 × 5 |
72.5, 126 | 3, 5 | — | 300 | 680 | 190 | 207 | ||
| WLG | 250–630/72.5–126 – 3 × 3 WLG | 250–630/72.5–126 – 5 × 5 |
400 | 260 | 900 | ||||||
| WDG | 800/40.5 – 3 × 3 WDG | 800/40.5 – 5 × 5 WDG | △ 800/40.5 – 3 × 3 WDG | △ 800/40.5 – 5 × 5 |
800 | 40.5 | — | 265 | 610 | 170 | 186 | ||
| WLG | 800/40.5 – 3 × 3 WLG | 800/40.5 – 5 × 5 WLG | △ 800/40.5 – 3 × 3 WLG | △ 800/40.5 – 5 × 5 |
350 | 265 | 900 | ||||||
1+2-phase vertical linear voltage-regulating (I, I) pipe-form (G) tap-changer (1000~2000A) "1+2" Phases linear voltage-regulating(I、I )pipe-form (G)vertical tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) Install dimension (mm) |
|||||||
| H | H1 | H2 | H3 | H4 | Φd | Φd1 | Φd2 | ||||
| WDG | 1000/40.5 – 3 × 3 WDG | 1000/40.5 – 5 × 5 WDG | △ 1000/40.5 – 3 × 3 WDG | △ 1000/40.5 – 5 × 5 |
1000 | 40.5 | 3, 5 | — | 265 | 75 | 35 | 610 | 18 | 170 | 186 |
| WLG | 1000/40.5 – 3 × 3 WLG | 1000/40.5 – 5 × 5 WLG | △ 1000/40.5 – 3 × 3 WLG | △ 1000/40.5 – 5 × 5 |
350 | 265 | 75 | 35 | 900 | 18 | |||||
| WDG | 1000/40.5 – 7 × 7 WDG | △ 1000/40.5 – 7 × 7 |
7 | — | 265 | 75 | 35 | 610 | 18 | 220 | 237 | ||
| WLG | 1000/40.5 – 7 × 7 WLG | △ 1000/40.5 – 7 × 7 |
350 | 265 | 75 | 35 | 900 | 18 | |||||
| WDG | 1250/40.5 – 3 × 3 WDG | 1250/40.5 – 5 × 5 |
1250 | 3, 5 | — | 340 | 75 | 60 | 680 | 22 | 190 | 207 | |
| WLG | 1250/40.5 – 3 × 3 WLG | 1250/40.5 – 5 × 5 |
400 | 300 | 75 | 60 | 1000 | 22 | |||||
| WDG | 1600/40.5 – 3 × 3 WDG | 1600/40.5 – 5 × 5 |
1600 | — | 340 | 75 | 60 | 680 | 22 | 210 | 227 | ||
| WLG | 1600/40.5 – 3 × 3 WLG | 1600/40.5 – 5 × 5 |
400 | 300 | 75 | 60 | 1000 | 22 | |||||
| WDG | 2000/40.5 – 3 × 3 WDG | 2000/40.5 – 5 × 5 |
2000 | — | 340 | 75 | 60 | 680 | 22 | 250 | 267 | ||
| WLG | 2000/40.5 – 3 × 3 WLG | 2000/40.5 – 5 × 5 |
400 | 300 | 75 | 60 | 1000 | 22 | |||||
Three-phases linkage single-bridge crossing connection(Il )pipe-form (G)verticaltap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) | Install dimension (mm) | |||||
| H | H1 | H2 | H3 | Φd1 | Φd2 | |||||
| WSG II 250~800/40.5 - 4×3 WSG II 250~800/40.5 - 6×5 |
250 400 500 630 800 |
40.5 | 3, 5 | 250 | 225 | 950 | 1050 | 170 | 186 | |
| WSG II 250~800/40.5 - 8×7 | 7 | 250 | 225 | 950 | 1050 | |||||
| WSG II 250~800/126 - 4×3 WSG II 250~800/126 - 6×5 |
126 | 3, 5 | 375 | 245 | 1200 | 1500 | ||||
| WSG II 250~800/126 - 8×7 | 7 | 375 | 245 | 1200 | 1500 | 210 | 227 | |||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer s requests.
2. When the customer chooses the floor-form fixing mode, please add the suffix "E" as a mark.
Three-phases linkage single-bridge crossing connection( Il )pipe-form (G)verticaltap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer | Rated current (A) | Highest voltage (kV) | Tap position number | Installation dimensions (mm) | Install dimension (mm) | |||||||||
| H | H1 | H2 | H3 | H4 | H5 | Φd | Φd1 | Φd2 | ||||||
| WSG II 1000/40.5 – 4×3 WSG Ⅱ 1000/40.5 – 6×5 WSG Ⅱ 1000/40.5 – 8×7 |
1000 | 40.5 | 3, 5, 7 | 350 | 300 | 150 | 35 | 1250 | 1350 | 18 | 170 | 186 | ||
| WSG Ⅱ 1000/126 – 4×3 WSG II 1000/126 – 6×5 |
126 | 3, 5 | 550 | 1650 | 1900 | |||||||||
| WSG II 1250~2000/40.5 – 4×3 WSG II 1250~2000/40.5 – 6×5 WSG II 1250~2000/40.5 – 8×7 |
1250 1600 2000 |
40.5 | 3, 5, 7 | 450 | 60 | 1500 | 1650 | 22 | 190 | 207 | ||||
| WSG II 1250~2000/126 – 4×3 WSG II 1250~2000/126 – 6×5 |
126 | 3, 5 | 550 | 1700 | – | |||||||||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer 's requests.
2. When the customer chooses the floor-form fixing mode, please add the suffix "E" as a mark.
"1+2" phase linkage single-bridge crossing connection (Il) pipe-form (G) vertical tap-changer (250~800A)
Type of tap-changer and installation size chart
| Switch model Type of tap changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) | Install dimension (mm) | ||||
| H | H1 | H2 | Φd1 | Φd2 | |||||
| WDG II 250~800/40.5 – 4 × 3 WDG II 250~800/40.5 – 6 × 5 |
250, 400, 500, 630, 800 | 40.5 | 3, 5 | — | 305 | 610 | 170 | 186 | |
| WLG II 250~800/40.5 – 4 × 3 WLG II 250~800/40.5 – 6 × 5 |
250 | 225 | 700 | ||||||
| WDG II 250~800/40.5 – 8 × 7 | 7 | — | 305 | 610 | |||||
| WLG II 250~800/40.5 – 8 × 7 | 250 | 225 | 700 | ||||||
| WDG II 250~800/126 – 4 × 3 WDG II 250~800/126 – 6 × 5 |
126 | 3, 5 | — | 305 | 610 | ||||
| WLG II 250~800/126 – 4 × 3 WLG II 250~800/126 – 6 × 5 |
450 | 245 | 900 | ||||||
| WDG II 250~800/126 – 8 × 7 | 7 | — | 305 | 610 | 210 | 227 | |||
| WLG II 250~800/126 – 8 × 7 | 450 | 245 | 900 | ||||||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer's requests.
2. When the customer chooses the floor-form fixing mode, please add the suffix "E" as a mark.
"1+2" phase linkage single-bridge crossing connection (Il) pipe-form (G) vertical tap-changer (1000~2000A) "1+2" phase linkage single-bridge crossing connection (Il) pipe-form (G) vertical tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimension (mm) | ||||||||
| H | H1 | H2 | H3 | H4 | Φd | Φd1 | Φd2 | |||||
| WDG II 1000/40.5 – 4×3 WDG II 1000/40.5 – 6×5 WDG II 1000/40.5 – 8×7 |
1000 | 40.5 | 3, 5, 7 | – | – | – | 35 | – | 18 | 170 | 186 | |
| WLG II 1000/40.5 – 4×3 WLG II 1000/40.5 – 6×5 WLG II 1000/40.5 – 8×7 |
350 | 300 | 150 | 900 | ||||||||
| WDG II 1000/126 – 4×3 WDG II 1000/126 – 6×5 |
126 | 3, 5 | – | – | – | – | ||||||
| WLG II 1000/126 – 4×3 WLG II 1000/126 – 6×5 |
550 | 300 | 150 | 1100 | ||||||||
| WDG II 1250~2000/40.5 – 4×3 WDG II 1250~2000/40.5 – 6×5 WDG II 1250~2000/40.5 – 8×7 |
1250 1600 2000 |
40.5 | 3, 5, 7 | – | – | – | 60 | – | 22 | 190 | 207 | |
| WLG II 1250~2000/40.5 – 4×3 WLG II 1250~2000/40.5 – 6×5 WLG II 1250~2000/40.5 – 8×7 |
450 | 300 | 150 | 1050 | ||||||||
| WDG II 1250~2000/126 – 4×3 WDG II 1250~2000/126 – 6×5 |
126 | 3, 5 | – | – | – | – | ||||||
| WLG II 1250~2000/126 – 4×3 WLG II 1250~2000/126 – 6×5 |
550 | 300 | 150 | 1150 | ||||||||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer's requests.
2. When the customer chooses the floor-form fixing mode, please add the suffix "E" as a mark.
Three-phases linkage single-bridge crossing connection ( Il ) pipe-form (G)horizontal tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated current (A) Rated current |
Maximum voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) | Install dimension (mm) | ||||||||||
| L | L1 | L2 | L3 | L4 | B | H | H1 | Φd1 | Φd2 | ||||||
| WSG II 250~800/40.5 - 4×3W WSG II 250~800/40.5 - 6×5W |
250-800 | 40.5 | 3, 5 | 250 | 225 | 950 | 455 | 465 | 250 | 200 | 350 | 170 | 186 | ||
| WSG II 250~800/40.5 - 8×7W | 7 | 250 | 225 | 950 | 455 | 465 | 200 | 350 | |||||||
| WSG II 250~800/72.5 - 6×5W | 72.5 | 3, 5 | 350 | 295 | 1200 | 575 | 715 | 280 | 430 | ||||||
1. The phase sequence of the switch is determined by the user.
1. The selection of phases are upon the customer 's requests.
Three-phases vertical y - exchanger (IV)pipe (G)tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) Install dimension (mm) |
|||||
| H | H1 | H2 | Φd1 | Φd2 | |||||
| WSG IV 250–630/12 – 3×2 | 250-630 | 12 | 2 | 240 | 245 | 950 | 190 | 207 | |
| WSG IV 800–1000/12 – 3×2 | 800-1000 | 350 | 265 | 1200 | |||||
| WSG IV 1250/12 – 3×2 | 1250 | 350 | 295 | 1300 | 190 | 207 | |||
| WSG IV 1600/12 – 3×2 | 1600 | 210 | 227 | ||||||
| WSG IV 2000/12 – 3×2 | 2000 | 350 | 300 | 1300 | 250 | 267 | |||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer 's requests.
2. When the customer chooses the floor-form fixing mode, please add the suffix "E" as a mark.
Three-phases double-bridge crossing connection(V)pipe-form (G)vertical tap-changer
Type of tap-changer and installation size chart
| Switch model Type of tap-changer |
Rated Current (A) Rated current |
Maximum Voltage (kV) Highest voltage |
Number of tap positions Tap position number |
Installation dimensions (mm) | Install dimension (mm) | |||||
| H | H1 | H2 | H3 | H4 | Φd1 | Φd2 | ||||
| WSG V 250–800/12 – 4×3 WSG V 250–800/12 – 6×5 |
250–800 | 12 | 3, 5 | 200 | 225 | 200 | 1400 | 1400 | 170 | 186 |
| WSG V 250–800/40.5 – 4×3 WSG V 250–800/40.5 – 6×5 |
40.5 | 250 | 225 | 200 | 1550 | 1650 | ||||
| WSG V 250–800/12 – 8×7 | 12 | 7 | 200 | 225 | 200 | 1400 | 1400 | |||
| WSG V 250–800/40.5 – 8×7 | 40.5 | 250 | 225 | 200 | 1550 | 1650 | ||||
1. The phase sequence of the switch is determined by the user;
2. When selecting a surface‑mount installation, please add the letter “E” after the switch model number to distinguish it.
1. The selection of phases are upon the customer's requests.
2. When the customer chooses the floor-form fixing mode, please add the suffix "E" as a mark.
Keywords:
Non-excitation tap changer
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