HT78 AC current clamps for measuring leakage currents


This leakage current clamp is mainly used for troubleshooting circuits in which the RCD (residual current device) repeatedly trips unintentionally.

  • AC TRMS current
    • Measuring range: 0.1 mA ÷ 3000 A
    • Resolution: 0.1 mA ÷ 1 A
    • Accuracy: ±(1.5% rdg + 8 digits)
    • Overload protection: 3000 A rms
  • Safety: IEC/EN 61010-1
  • Overvoltage category: CAT II 600 V, CAT III 300 V (HT78)
  • Display: LCD 4 digits, 3200 counts (HT78)
Datasheet
Add to your Quote List

The models HT77N and the innovative HT78 are current clamps designed for highly accurate measurements of very small currents in the µA and mA range.
These leakage current clamps are primarily used for troubleshooting circuits where the RCD (residual current device) repeatedly trips unintentionally,
for example due to insulation faults or stray leakage currents.

The HT78 also features an optional low-pass filter to eliminate harmonic components during measurements,
as well as a DC analog output for connection to an external data logger.
The extremely large clamp opening (suitable for cable diameters up to 108 mm) provides users with a wide range of possible applications.

ALLGEMEINE SPEZIFIKATIONEN
Anzeige: LCD 4 Digits, 6000 Punkte (HT77N)
LCD 4 Digits, 3200 Punkte (HT78)
Messwertermittlung: TRMS
Spannungsversorgung: 2x 1,5 V Batterien Typ AAA LR03
Auto Power OFF: nach 10 min im Stand-by Betrieb
Sicherheit: IEC/EN 61010-1
Überspannungskategorie: CAT III 300 V (HT77N)
CAT II 600 V, CAT III 300 V (HT78)
Isolation: Doppelte Isolation
Verschmutzungsgrad: 2
Max. Höhe: 2000 m
Max. Kabeldurchmesser: 40 mm (HT77N), 108 mm (HT78)
Abmessung (H x B x T): 202 x 75 x 42 mm (HT77N)
341 x 194 x 52 mm (HT78)
Gewicht (inkl. Batterien): 265 g (HT77N), 1,9 kg (HT78)

 

TECHNISCHE
SPEZIFIKATIONEN		 HT77N HT78
AC TRMS Strom
Messbereich: 10 μA ÷ 100 A 0,1 mA ÷ 3000 A
Auflösung: 1 μA ÷ 0,1 A 0,1 mA ÷ 1 A
Genauigkeit: ±(1,0 % rdg + 8 digits) ±(1,5 % rdg + 8 digits)
Überlastschutz: max. 120 A rms 3000 A rms
Analoger DC Ausgang (nur HT78)
Messbereiche: 0,3, 3, 30, 300, 3 kA
Max. Ausgangsspannung: 300 mV
Grundgenauigkeit: ±(1,5 % FS)

 


Datasheets








HT78 AC current clamps for measuring leakage currents
Technical advice: 03303 / 50 40 66

Technical advice for this product


    In accordance with the General Data Protection Regulation (GDPR), we are obliged to inform you about the collection of data. We meet this obligation by referring to our privacy notice.



    HT78 AC current clamps for measuring leakage currents

    HT78 AC current clamps for measuring leakage currents

    This leakage current clamp is mainly used for troubleshooting circuits in which the RCD (residual current device) repeatedly trips unintentionally.

    • AC TRMS current
      • Measuring range: 0.1 mA ÷ 3000 A
      • Resolution: 0.1 mA ÷ 1 A
      • Accuracy: ±(1.5% rdg + 8 digits)
      • Overload protection: 3000 A rms
    • Safety: IEC/EN 61010-1
    • Overvoltage category: CAT II 600 V, CAT III 300 V (HT78)
    • Display: LCD 4 digits, 3200 counts (HT78)
    Datasheet
    Add to your Quote List

    The models HT77N and the innovative HT78 are current clamps designed for highly accurate measurements of very small currents in the µA and mA range.
    These leakage current clamps are primarily used for troubleshooting circuits where the RCD (residual current device) repeatedly trips unintentionally,
    for example due to insulation faults or stray leakage currents.

    The HT78 also features an optional low-pass filter to eliminate harmonic components during measurements,
    as well as a DC analog output for connection to an external data logger.
    The extremely large clamp opening (suitable for cable diameters up to 108 mm) provides users with a wide range of possible applications.

    ALLGEMEINE SPEZIFIKATIONEN
    Anzeige: LCD 4 Digits, 6000 Punkte (HT77N)
    LCD 4 Digits, 3200 Punkte (HT78)
    Messwertermittlung: TRMS
    Spannungsversorgung: 2x 1,5 V Batterien Typ AAA LR03
    Auto Power OFF: nach 10 min im Stand-by Betrieb
    Sicherheit: IEC/EN 61010-1
    Überspannungskategorie: CAT III 300 V (HT77N)
    CAT II 600 V, CAT III 300 V (HT78)
    Isolation: Doppelte Isolation
    Verschmutzungsgrad: 2
    Max. Höhe: 2000 m
    Max. Kabeldurchmesser: 40 mm (HT77N), 108 mm (HT78)
    Abmessung (H x B x T): 202 x 75 x 42 mm (HT77N)
    341 x 194 x 52 mm (HT78)
    Gewicht (inkl. Batterien): 265 g (HT77N), 1,9 kg (HT78)

     

    TECHNISCHE
    SPEZIFIKATIONEN    		 HT77N HT78
    AC TRMS Strom
    Messbereich: 10 μA ÷ 100 A 0,1 mA ÷ 3000 A
    Auflösung: 1 μA ÷ 0,1 A 0,1 mA ÷ 1 A
    Genauigkeit: ±(1,0 % rdg + 8 digits) ±(1,5 % rdg + 8 digits)
    Überlastschutz: max. 120 A rms 3000 A rms
    Analoger DC Ausgang (nur HT78)
    Messbereiche: 0,3, 3, 30, 300, 3 kA
    Max. Ausgangsspannung: 300 mV
    Grundgenauigkeit: ±(1,5 % FS)

     


    Datasheets








    Technical advice: 03303 / 50 40 66

    Technical advice for this product


      In accordance with the General Data Protection Regulation (GDPR), we are obliged to inform you about the collection of data. We meet this obligation by referring to our privacy notice.



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