TECHNICAL DATA TYPE WDG/WLG/WSG OFF- CIRCUIT TAP CHANGER HM0.154.6001 SHANGHAI HUAMING POWER EQUIPMENT CO., LTD.

TYPE WDG/WLG/WSG OFF-CIRCUIT TAP CHANGER TECHNICAL DATA 1. General⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2 2. Technical specifications⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2 3. Type designation⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯5 4. Terms and definitions⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯7 5. Special design⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯10 6. Operation method⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯10 7. Position indicator⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11 8. accessories⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11 9. Appendices⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11...

1. General Type WDG/WLG/WSG Off-Circuit Tap Changer (herein referred as tap changer) is a drum structure off-circuit tap changer applicable for power transformer and industry transformer as well as traction transformer. It can only be operated when the transformer is de-energized. By number of phase, tap changer can be divided into three-phase, single plus two-phase and single phase. By leads output terminal location, it is divided into middle output leads, two ends output leads and without fixed leads. Type A and Type B tap changers can be mounted between the coils of the transformer; and type...

Table 1-1 Drum Series Off-Circuit Tap Changer Technical Data Item WDG (single phase), WLG (2-phases), Type A Max. rated through current(A) Short circuit current test (kA) Dynamic (Peak) Linear (IV), single-bridging (V), Y-D change-over (VI), Double-bridging (VII), series-parallel (VIII) ,reversing (II) Maximum operation positions The highest voltage for equipment Rated separate source AC withstand voltage(50Hz, 1min) Rated lightning impulse withstand voltage ( 1.2/50) Internal insulation Operation method Manual operation on top or at side, motor driving at side Table 1-2 Drum Series Off-Circuit...

Table 1-3 Drum Series Off-Circuit Tap Changer Technical Data Item WDG (single phase), Type B Single phase Max. rated through current(A) Short circuit current test (kA) Dynamic (Peak) Maximum operation positions The highest voltage for equipment Rated separate source AC withstand voltage(50Hz, 1min) Rated lightning impulse withstand voltage ( 1.2/50) Internal insulation Operation method Manual operation on top or at side, motor driving at side Table 1-4 Drum Series Off-Circuit Tap Changer Technical Data Item Max. rated through current(A) Short circuit current test (kA) Dynamic (Peak) Maximum operation...

3. Type designation 3.1. Type explanation Due to the different combinations of number of phases, maximum rated through current, the highest voltage for equipment and connections, type WDG/WLG/WSG off-circuit tap changer comes with various models. The type designation provides the above mentioned parameters as below: W □ G □ □ □ / □ - □×□ □ A —— Leads from middle of radial B— Leads from axial C ——Without fixed leads Operating positions Contact pitch in circle The highest voltage for equipment (kV) Connection (Y-for neutral point, D-for any connection, only relevant to type C) Max. rated through...

TYPE WDG/WLG/WSG OFF-CIRCUIT TAP CHANGER TECHNICAL DATA Table 2 Tap Changer Basic Connection

4. Terms and definitions 4.1 Rated through-current Rated through current Iu: The current flowing through the tap changer toward the external circuit, which can be carried continuously while meeting the requirement. The maximum rated through current Ium: The highest rated through current for which the tap changer is designed for and which forms the basis for all current related tests. 4.2. Short circuit current test According to IEC 60214-1: 2003, all contacts continuously carrying the current shall be able to withstand 2s (±10%) short circuit test current without melting, deformation or mechanical...

TYPE WDG/WLG/WSG OFF-CIRCUIT TAP CHANGER TECHNICAL DATA Series-parallel (VIII) a: Between max. and min. taps of the same phase b: Between any winding taps of different phases or between start and end of the same tap winding for double-bridging Fig. 3 Basic Connection Diagram and Insulation Distance Mark

Table 3 Tap Changer Internal Insulation Level (Unit:kV) Linear(IV) , Single-bridging(V), Y-D change-over(VI), Double-bridging(VII), Series-parallel(VIII), Reversing(II) The highest voltage for equipment Insulation distance mark Rated lightning impulse withstand voltage ( 1.2/50 μ s ) Rated separate source AC withstand voltage(50Hz, 1min) Linear(IV) , Single-bridging(V), Reversing(II) The highest voltage for equipment Insulation distance mark Rated lightning impulse withstand voltage ( 1.2/50 μ s ) Rated separate source AC withstand voltage(50Hz, 1min) Linear(IV) , Single-bridging(V) The highest...

4.5. Tap changer insulation to earth The tap changer insulation to earth, that is insulation between tap changer live parts and grounding part, it is determined by dielectric tests according to IEC-60214-1-2003, please refer to table 4 below. Table 4 Tap changer Insulation Level to Earth The highest voltage for equipment (kV) Rated separate source AC withstand voltage (kV/50Hz, 1min) Rated lightning impulse withstand voltage (kV, 1.2/50μs) 4.6. Tap changer mounting method 4.6.1. Type A and type B off-circuit tap changer is suitable for installing between adjacent transformer coils. 4.6.2. Type...

Table 5 Motor Drive Unit Technical Data Motor drive unit Rated power (W) Rated voltage (V) Motor Rate frequency(Hz) Rated torque on drive shaft (Nm) Revolution of the drive shaft per switching operation Revolution of the hand crank per switching operation Running time per switching operation (S) Voltage for control circuit and heater circuit (V) A.C. voltage test to ground (kV/50Hz, 1min) Protective degree Mechanical endurance (operations) 7. Position indicator HMC-3W OCTC position indicator is a support fitting for CMA7 motor drive unit, it can be used to indicate the OCTC position in the control...