Email:i-trade1@lnjldq.com Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Off load Three Phase Linear Tap Changer

Product Description

OFF CIRCUIT THREE PHASE LINEAR TAP CHANGER


specific introduction:

This series of switches is composed of the main body of the switch and the operation turning organ.They are applicable to the oil-immersed transformers with the frequency of 50HZ,60HZ,rated voltage of 35KV,66KV,110KV,rated current of 200A-1500A.They can be fixed on the body of the transformer or on the box-cover,and be tapped,regulated and changer under non excitation condition.



INTRODUCTION:
No load tap changers are often utilized in situations in which a transformer's turn ratio does not require frequent changing and it is permissible to de-energize the transformer system. This type of transformer is frequently employed in low power, low voltage transformers in which the tap point often may take the form of a transformer connection terminal, requiring the input line to be disconnected by hand and connected to the new terminal. Alternatively, in some systems, the process of tap changing may be assisted by means of a rotary or slider switch

CHARACTERISTIC:

1) USED MINERAL OIL OR SILICON OIL
2) RATED VOLTAGE 10KV-33KV
3) RATED CURRENT 30A-60A
4) TAPPING POSITION: 3-7
REGULATION 2.5% PER POSITION


Item No. of the tap changerWST II 30/20-6X5S
Rated current(A)30
Rated votage(kV)20
Rated power(HZ)50/60
Number of phase 3
Regulating position central
Quantity of tapping heads6
Quantity of working position5
life times5000
contact pressure between
 dynamic and static contactor
≤350μΩ
load bearing of short-circuit(KA)Thermal stabilization
(2S effectitive value)
18.75
dynamic stability
(peak value)
7.65
Dielectric level
(KV)
Rated voltage30
Power-frequency
 voltage
30
Impulse voltage55
Temp.-rise limit of contact(k)≤15


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