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Current Transformer

Current Transformer

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Current transformer is used in the panel building, generator, wind power. Brand: SIEMENS APT. Series: ALH-0.66I, ALH-0.66II, ALH-0.66III, ALH-0.66M, ALH-0.66D.

Product Description

The material of ALH-0.66 I current transformer housing is high-strength PC plastic in fully enclosed structure. It is compatible for square and round holes for cable or bus. It shall be normally used for control, protection and measurement. P1 and P2 refer to the primary polarity end; S1 and S2 refer to the secondary polarity end. P1, S1 and P2, S2 are dotted terminals (subtractive polarity). Power frequency withstand voltage is 3000V 1min when 50Hz (between the housing and the secondary coil). Insulation class is E.


The material of ALH-0.66 II type current transformer housing is made of high-strength PC in fully enclosed structure. It has rectangle perforation with one coil of core-through and mainly used for bus (also available for cable). It can penetrate 6 buses in maximum. It is normally used for control, protection and measurement. P1 and P2 refer to the primary polarity end; S1 and S2 refer to the secondary polarity end. P1, S1 and P2, S2 are dotted terminals (subtractive polarity). Power frequency withstand voltage is 3000V 1min when 50Hz (between the housing and the secondary coil). Insulation class is E.



The material of ALH-0.66 III type current transformer is the improved product on the basis of I and II type. It is mainly used for vertical arrangement of three-phase bus, so as to avoid the inconvenience of secondary outlet obstructed by the adjacent bus or the transformer. It is installed mainly by fixing the bus, which is very convenient. Meanwhile, it enlarges the capacity of the transformer and greatly improves its accuracy. Therefore, it meets the higher requirements of large load impedance and electricity measurement. P1 and P2 refer to the primary polarity end; S1 and S2 refer to the secondary polarity end. P1, S1 and P2, S2 are dotted terminals (subtractive polarity). Power frequency withstand voltage is 3000V 1min when 50Hz (between the housing and the secondary coil). Insulation class is E.


The material of ALH-0.66M type current transformer is applicable to small current and small space occasions, especially the drawer cabinet. It can be easily and directly installed with the guide rail (or the bottom rail provided by the manufacturer) or the bus. By adopting the screw-type primary wiring, it may not need to increase the number of coils on the primary side during small current. Power frequency withstand voltage is 3000V 1min when 50Hz (between the housing and the secondary coil). Insulation class is E.


Apart from the features of M type, ALH-0.66 D type current transformer’s primary side uses the direct core-through methods, without disconnecting the wire. The core-through hole diameters are 8mm, 12mm, 15mm and 22mm with one coil each. Power frequency withstand voltage is 3000V 1min when 50Hz (between the housing and the secondary coil). Insulation class is E.


Packaging & Delivery

Standard packing quantity: 2 PCS.

Delivery is 5 work days.