CV2
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TECHNICAL DATA TYPE CV2 VACUUM ON-LOAD TAP CHANGER FOR OIL-IMMERSED TRANSFORMER HM0.154.4101 SHANGHAI HUAMING POWER EQUIPMENT CO., LTD.

TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA 1. General⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2 2. Technical specifications⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯3 3. Type designation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯4 4. Terms and definitions⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯6 5. Special design ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯9 6. Motor drive unit ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11 7. Operation controllers ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11 8. Accessories⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯12 9....

1. General Type CV2 vacuum on-load tap changer (herein referred as tap changer) is of compound structure, applicable to oilimmersed power transformers with highest equipment voltage from 40.5 to 145kV, maximum through-current up to 500A and frequency of 50Hz ~ 60Hz. It is used to change the transformer winding taps on load. Tap changer is to be mounted on transformer tank top by means of a top flange. Tap changer is operated by a motor drive unit. Tap changer and motor drive unit are connected by a top gearbox, driving shaft and a bevel gear box. Tap changer provides both local and remote...

2. Technical specifications Type CV2 on-load tap changer complies with IEC 60214-1:2003 standard. Tap changer technical data is listed in Table 1 below. Table 1 Type CV2 Series of On-Load Tap Changer Technical Data TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA * Please refer to Fig.5 on page 6

3. Type designation 3.1. Type designation Due to the different combinations of no. of phases, maximum rated through current, highest equipment voltage and connections, type CV2 comes with various models. Hence, the type designation shall provide all the above technical parameter and below is its detailed explanation. CV2 III - 500 D / 72.5 10193W Basic connecting method, refer to 3.2 The highest voltage for equipment (kV) Connection method (Y/D) Maximum rated through-current(A) No. of phases Product type Fig. 2 Tap Changer Model Explanation 3.2. Selector switch basic connection method...

steps steps steps steps Fig. 4 CV2 OLTC Basic Connection Diagrams TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA

4. Terms and definitions 4.1. Rated through-current (Iu), rated step voltage (Ui) and step capacity (PStN) Fig. 5 Rated Switching Capacity of Three-phase CV2 OLTC According to the above figure, the permissible max. rated through-current and related step voltage can be found for different tap changer ratings. The step voltage is limited by load current and step switching capacity. TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA 4.2. Breaking capacity Breaking capacity PStmax is the maximum switching capacity under safe switching load. According to stipulations of IEC60214-1:2003, breaking...

4.5. Voltage gradient of selector switch part a1: Between any service contact and pre-service contact of the selector switch a: between start and end of a fine tap winding; also between start and end of coarse tap winding. Note: when the tap is on the coarse/fine change-over selector: For impulse voltage, insulation between end of coarse tap winding which is connected to K contact of selector switch and end of fine tap winding of the same phase shall comply the permissible value of (a). b: between any tapping of different fine tap windings, or between ends of different coarse windings. This...

<§)Hm Table 2 Tap Changer Internal Insulation Level TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA

4.7. Tap changer insulation level to earth Tap changer insulation level to earth is the insulation between tap changer potential part and grounding part. It is determined by dielectric tests according to IEC-60214-1-2003. The demand of which correlates to the transformer tap winding location, regulation range & regulation method, winding connection & arrangement and rated voltage of transformer winding. It is decided by the insulation to earth of transformer tap winding. Table 3 OLTC Insulation Level To Earth (unit: kV) 4.8. Tap changer mounting method Type CV2 tap changer is mounted to...

Fig. 7 Permanent Connection of the Tie-in Resistor Rp TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA Fig. 8 Winding Arrangement of Reversing Regulation of Double Winding Transformer For the convenience of Huaming to define the load of the change-over selector and size & quantity of the tie-in resistor, please provide the following transformer data when selecting tap changer: a) All transformer performance data: rated capacity, rated voltage, regulation range, connection of winding and insulation level, etc.; b) Relative arrangement of winding: relative location between tap winding and...

ijji.HIW_6. Motor drive unit Type CV2 tap changer is driven by motor drive unit either SHM-III or CMA7. Its technical data is shown below in Table 4. Table 4 Motor Drive Unit Technical Data Note: Please specify if special voltage required for motor, and control & heater circuit. TYPE CV2 VACUUM ON-LOAD TAP CHANGER TECHNICAL DATA 7. Operation controllers 7.1 HMK8 controller HMK8 controller is the device for remote control of SHM-III motor drive unit; it realizes OLTC switching operation through SHM-III. HMK8 can display the OLTC switching operation status and tap positions. HMK8 has BCD code...

7.2 HMC-3C position indicator HMC-3C OLTC position indicator is a support fitting for CMA7 and CMA9 motor drive unit, it can be used to indicate the OLTC position, and has the function of "1→ N", "STOP", "N→ 1" control as well as remote control indicator lamp, its input is decimal code and output is BCD code. Working voltage: 220V AC Power frequency: 50Hz Maximum operation positions: 107 Environment temperature: -10℃ to 40℃ Indoor 7.3 Automatic voltage regulator ET-SZ6 and HMK-2A Automatic voltage regulator ET-SZ6 and HMK-2A is adopted for OLTC automatic voltage regulation, ET-SZ6 can be...