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เริ่มเมื่อ 2012-11-03

เครื่องวัดกระแสไฟฟ้า 3 เฟส

3 Phase Sequence Rotation Indicator Tester Checker

Phase Indicator w/ Open Phase Checker & Buzzer
(Model: SM-852B)

ราคาพิเศษ 990 บาท


This SM-852B phase indicator is design to check the presence of OPEN PHASE and PHASE SEQUENCE thru the designated LEDs and an audible buzzer sound simultaneously. It features the fast and accurate measurement & checking of the presence of open phase and phase sequence condition. This hand held instrument correctly identify the rotary field of a three phase system ensuring that correct phase sequencing is achieved. As a requirement of the 17th edition wiring regulations, correct identification of phases must be proved in each circuit and a must for any plant maintenance staff. SM-852B is the perfect & ideal tool to do such job. The unit comes with interchangeable crock clips, but any type of probe can be used plus a protective carrying case to keep your testing in great condition.

Testing is as easy as connecting the included well insulated alligator clips of the unit to the three phase circuit under test and the unit will indicate the presence of open phase & phase sequence thru the LEDs and buzzer. Before energizing electrical motors and other equipments, it is important to know the phase sequence because incorrect connection can cause damage to the equipments.

Electrical Safety Standards:
SM-852B is designed, manufactured & tested to meet IEC-348 safety class II (Safety requirements for electronic measuring apparatus).

Prevent damage to equipment by using the SM-852B to check supply line phase orientation and sequence of the connected lines!



Features: Efficient, effective, reliable, easy and safe to use.

  • Fast with highly accurate measurement results
  • 2 functions in one unit: Open phase indication & Phase rotation indication
  • Checks open phases & Identifies 3 phase sequence condition
  • With simultaneous indications via LEDs and audible buzzer sound
  • Indicates direction of the rotation
  • Ensures the object being tested is not damaged from incorrect wiring
  • Indicates phase orientation (clockwise or counter-clockwise) and whether each of three phases is live
  • Portable, compact design and meet the Electrical Safety Standards IEC-348



  • Operational Voltage: 200-600V AC
  • Limit Time for Continuous Use:
    60 minutes maximum at 200V AC
    ********* * 4 minutes maximum at 600V AC
  • Operating Frequency Range : 20 Hz - 400 Hz
  • Limit Support Voltage : 2000 V/min (impulse voltage 4000V)
  • Operation Voltage : 60V - 600V AC, three phase
  • Nominal test current: 60V-600V
  • Test Leads : Double insulation
  • Length of test leads : approx. 1 meter long
  • Protection level : 2000V
  • Operating Temperature : -10°C - 60°C
  • Item dimension : 64 (L) x 85 (W) x 23 (D) mm (2.5 x 3.2 x 0.9" inch)
  • Item weight : approx. 200g


    Open Phase Check LEDs
    Phase Sequence Check LEDs
    All 3 orange LEDs are lit Green LED is lit Intermittent beep
    All 3 orange LEDs are lit Red LED is lit Continuous beep
    Orange LED for open phase is off Both Green & Red LEDs are off Continuous beep

Accessories included:

  • Main unit with Test leads
  • 3 x Alligator clips
  • Instruction Manual
  • Zippered Blue carrying case


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