10 isoCHA425_D00352_02_Q_DEEN / 11.2023
ISOMETER® isoCHA425
Technical data
()* = Factory settings
Insulation coordination acc. to IEC 60664-1/IEC 60664-3
Rated voltage ................................................................................ 400 V
Overvoltage category ..........................................................................III
Supply voltage
Supply voltage Us.................................. AC 100…240 V/DC 24…240 V
Tolerance of Us.................................................................−30…+15 %
Frequency range Us...............................................................47…63 Hz
Power consumption.........................................................≤ 3 W, ≤ 9 VA
Monitored IT system
Nominal system voltage Un................................................DC 0…400 V
Tolerance of Un............................................................................+ 25 %
Response values
Response value Ran1 .........................................Ran2…250 kΩ (230 kΩ)*
Response value Ran2 ...............................................5 kΩ…Ran1 (48 kΩ)*
Hysteresis Ran ....................................................................25 %, > 1 kΩ
Undervoltage detection U<........................................ 10…499 V (off)*
Overvoltage detection U>.......................................... 11…500 V (off)*
Overload detection U...............................510 V (cannot be deactivated)
Hysteresis U ...........................................................................5 %, > 5 V
Mode CCS (dc)
Permissible system leakage capacitance Ce.................................. ≤ 5 µF
Measuring and display range RF......................................... 1 kΩ…2 MΩ
Measurement uncertainty RF/ relative uncertainty Ran ...±15 %, ±2 kΩ
Measuring and display range Ce..................................................................0…17 µF
Measurement uncertainty Ce:
RF< 10 kΩ ............................................................no measurement
RF≥ 10 kΩ ............................................................. ±15 %, ±0.1 µF
Response time tan:
Ran = 2.0 x RFand Ce= 1 µF acc. to IEC 61557-8....................≤ 10 s
Ran = 2.0 x RFand RF≤ 100 kΩ..............................................≤ 10 s
Mode CHAdeMO (CHd)
System voltage Un...............................measurement from Un≥ DC 50 V
Permissible system leakage capacitance Ce.........per conductor ≤ 1.6 µF
Measuring and display range RF& RFU..............................................1 kΩ…2 MΩ
Measurement uncertainty RF/ relative uncertainty Ran....... ±15 %, ±2 kΩ
Measuring and display range Ce.............................................. 0…17 µF
Measurement uncertainty Ce:
RF< 10 kΩ ............................................................no measurement
RF≥ 10 kΩ ............................................................. ±15 %, ±0.1 µF
Response time tan:
Ran = 2.0 x RFU and RFU ≤ 100 kΩ...........................................≤ 10 s
Ran = 2.0 x RF.........................................................................≤ 10 s
Technische Daten
()* = Werkseinstellung
Isolationskoordination nach IEC 60664-1/IEC 60664-3
Bemessungsspannung................................................................... 400 V
Überspannungskategorie.....................................................................III
Versorgungsspannung
Versorgungsspannung Us...................... AC 100…240 V/DC 24…240 V
Toleranz von Us................................................................−30…+15 %
Frequenzbereich Us...............................................................47…63 Hz
Eigenverbrauch................................................................≤ 3 W, ≤ 9 VA
Überwachtes IT-System
Netznennspannung Un.......................................................DC 0…400 V
Toleranz von Un...........................................................................+ 25 %
Ansprechwerte
Ansprechwert Ran1 ...........................................Ran2…250 kΩ (230 kΩ)*
Ansprechwert Ran2 .................................................5 kΩ…Ran1 (48 kΩ)*
Hysterese Ran .....................................................................25 %, > 1 kΩ
Unterspannungserkennung U<.................................. 10…499 V (off)*
Überspannungserkennung U>................................... 11…500 V (off)*
Überlasterkennung U...................................... 510 V (nicht abschaltbar)
Hysterese U ...........................................................................5 %, > 5 V
Mode CCS (dc)
Zulässige Netzableitkapazität Ce.................................................. ≤ 5 µF
Mess- und Anzeigebereich RF............................................. 1 kΩ…2 MΩ
Messunsicherheit RF/ Ansprechunsicherheit Ran..............±15 %, ±2 kΩ
Mess- und Anzeigebereich Ce.................................................. 0…17 µF
Messunsicherheit Ce:
RF< 10 kΩ ................................................................keine Messung
RF≥ 10 kΩ ............................................................. ±15 %, ±0,1 µF
Ansprechzeit tan:
Ran = 2,0 x RFund Ce= 1 µF nach IEC 61557-8......................≤ 10 s
Ran = 2,0 x RFund RF≤ 100 kΩ..............................................≤ 10 s
Mode CHAdeMO (CHd)
Netzspannung Un...................................... Messbetrieb ab Un≥ DC 50 V
Zulässige Netzableitkapazität Ce.................................je Leiter ≤ 1,6 µF
Mess- und Anzeigebereich RF& RFU ...................................1 kΩ… 2 MΩ
Messunsicherheit RF/ Ansprechunsicherheit Ran..............±15 %, ±2 kΩ
Mess- und Anzeigebereich Ce........................................................................0…17 µF
Messunsicherheit Ce:
RF< 10 kΩ ................................................................keine Messung
RF≥ 10 kΩ ............................................................. ±15 %, ±0,1 µF
Ansprechzeit tan:
Ran = 2,0 x RFU und RFU ≤ 100 kΩ...........................................≤ 10 s
Ran = 2,0 x RF........................................................................≤ 10 s
