LA39-F

LA39-F series pushbuttons have compact structure and small volume. T...

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LA39-G

LA39-G series products cover the shortages of other products, with s...

LA39-E

LA39-E series pushbuttons are characterized by delicate design, aest...

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LA39-A

LA39 pushbuttons have novel structure, aesthetic appearance and comp...

LA39-B

LA39 pushbuttons have novel structure, aesthetic appearance and comp...

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LA39-C

LA39 pushbuttons have novel structure, aesthetic appearance and comp...

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AD16-12A

AD16-12A series indicators adopt high-brightness pure-color LED lumi...

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AD16-16A

AD16-16 series indicators adopt high-brightness pure-color LED lumin...

AD16-16B

AD16-16 series indicators adopt high-brightness pure-color LED lumin...

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AD16-16SM

AD16-16系列闪光蜂鸣器采用高亮度纯色LED发光芯片为光源,寿命长,耗能低,...

AD16-16M

AD16-16系列蜂鸣器寿命长,耗能低,体积小,重量轻,可靠性好,造型美观和制造...

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AD16-22SM

AD16-22 series flash buzzers adopt high-brightness pure-color LED lu...

AD16-22M

AD16-22 series buzzers are characterized by long service life, low e...

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AD16-30M

AD16-30 series buzzers are characterized by long service life, low e...

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LW39-10

LW39-10 series are widely used in the places with quite small instal...

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LW39-16N

LW39-16N series cam switch is a major series of products specially r...

LW39-16C

LW39-16C series cam switches are widely used in the measurement, con...

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LW39-25

LW39-25 cam switch is applicable to the places with greater capacity...

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TL-501

TL-501 series tower lampsare the optimized products based on TL-50, ...

TL-50

TL-50 series tower lamps are independently researched and developed ...

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TL-70

TL-70 series tower lampsare independently researched and developed b...

TL-701

TL-701 series tower lampsare independently researched and developed ...

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TL-90

TL-90 series tower lampsare independently researched and developed b...

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ALH-0.66 I

ALH-0.66 series current transformers have novel design, advanced com...

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ALH-0.66 II

ALH-0.66 series current transformers have novel design, advanced com...

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ALH-0.66 III

ALH-0.66 series current transformers have novel design, advanced com...

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ALH-0.66 M

ALH-0.66 series current transformers have novel design, advanced com...

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ALH-0.66 Φ

ALH-0.66 series current transformers have novel design, advanced com...

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ZY4

ZY4 series miniature control relays are independently researched and...

ZY2

ZY2 series miniature control relays are independently researched and...

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DY3

DY3 series miniature control relays are independently researched and...

DY2

DY2 series miniature control relays are independently researched and...

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XX series

The maintenance boxes are made of plastics, with such features as go...

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XM series

The maintenance boxes are made of plastics, with such features as go...

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ALS1-M

Metal products of standard specifications adopt the structure of int...

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ALS1-P

Plastic products of standard specifications adopt the structure of m...

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Online selection

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Download Center

In order to make you have a more overall understanding on APT products,we provide FAQ, product manual, instructions, certificate to download.

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Into APT

APT has been established in 1993. Today it is now a Chinese leading manufacturer of low-voltage control devices.
Brand concept come from the initial letters of three English words:Advanced (A), Perfect (P) ,Top (P).

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Contact Us

Tel:021-56553757
Adress:Room 301,No.55 Lane 777,West Guangzhong Road,Shanghai

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Distributor entrance

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ALH-0.66 III

ALH-0.66 series current transformers have novel design, advanced compensation method, excellent process technology, safe and reliable performance, small and aesthetic appearance, as well as complete varieties. They are normally used for control, protection and measurement.

Important parameters:

Rated insulation voltage: AC660V

Power frequency withstand voltage: 3kV (1min, 50Hz; between the enclosure and secondary terminal)


  • Product features
  • Technical parameters
  • The enclosure is made of high-strength PC material with totally-enclosed structure. It is mainly used where the three-phase bus bar is arranged vertically and it is installed mainly by fixing bus bar.

    The capacity of transformer is increased and its precision is greatly improved, so that it can meet the higher requirements for the high impedance load and electric energy measurement.

    Internal iron core adopts high-quality silicon steel sheet;

    In conformance with GB0840.2-2014;

    Pass the National Metrology Accreditation;

    Secondary current is divided into 5A and 1A;


  • Rated working voltage (Un): AC660V

    Rated frequency: 5060Hz

    Rated continuous thermal current (Icth): 1.2 x Ipn

    Rated short thermal current (Ith): 60x Ipn (1sec.)

    Power frequency withstand voltage: 3kV (1min, 50Hz; between the enclosure and secondary terminal)

    Insulation class: E

    Type of wiring terminal: screw pressing sheet fastening type (thread is M4)

    Operating torque: tightening torque 0.81.2N.m, max. bearing torque 2.4N.m;

    Protection class: IP00 for terminal and IP40 for enclosure;

    Altitude of installation place: not more than 3,000m


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