
10
IR427-MK7_D00118_02_M_DEEN/05.2017
ISOMETER® IR427 plus MK7
Technical data IR427
Insulation coordination acc. to IEC 60664-1 / IEC 60664-3
Rated insulation voltage .......................................................................................................... 250 V
Rated impulse voltage/pollution degree ............................................................................ 4 kV / III
Protective separation (reinforced insulation) between ....................................................................
............................................................................... (L1, L2, E, KE, 1, 2, 3, 4, Z, Z/k, I) - (11, 12, 14)
Voltage test according to IEC 61010-1 .................................................................................. 2.2 kV
Supply voltage
Supply voltage US...................................................................................................................... = Un
Power consumption............................................................................................................... ≤4 VA
IT system being monitored
Nominal system voltage Un..................................................................................... AC 70…264 V
Nominal frequency fn.............................................................................................. 47……63 Hz
Insulation monitoring
Response value Ran ...................................................................................... 50…500 kΩ (50 kΩ)*
Relative percentage error ..................................................................................................... ±10 %
Hysteresis.................................................................................................................................. 25 %
Response time tan at RF= 0.5 x Ran and Ce= 0.5 μF ............................................................. ≤5 s
Permissible system leakage capacitance Ce............................................................................. 5 μF
Measuring circuit
Measuring voltage Um ........................................................................................................... ±12 V
Measuring current Im(at RF= 0
Ω
) ................................................................................... ≤50 μA
Internal DC resistance Ri.................................................................................................... ≥240 kΩ
Impedance Zi, at 50 Hz ...................................................................................................... ≥200 kΩ
Extraneous DC voltage Ufg ............................................................................................. ≤DC 300 V
Load current monitoring
Response value, adjustable ................................................................................... 5…50 A (7 A)*
Relative percentage error ....................................................................................................... ±5 %
Hysteresis ..................................................................................................................................... 4%
Setting value load current measurement:
Transformer ..... 3150 VA ....... 4000 VA ....... 5000VA ....... 6300VA ....... 8000VA ..... 10000 VA
Ialarm 1~ ...................14A.............. 18A ............. 22A ............. 28A .............. 35A .............. 45 A
Response time overload, (50 % to 120 %) ............................................................................. < 5 s
Response time for measuring current transformer monitoring............. at restart, test or every 1 h
Temperature monitoring
Response value (fixed value) .................................................................................................... 4 kΩ
Release value (fixed value) ..................................................................................................... 1.6 kΩ
PTC thermistors acc. to DIN 44081 .......................................................................... max. 6 in series
Response time overtemperature .............................................................................................. < 2 s
Response time connection fault PTC resistors..........................................................................< 2 s
Displays, memory
LC display ...................................................................................... multifunctional, not illuminated
Measured value insulation resistance ...................................................................... 10 kΩ…1 MΩ
Operating error ....................................................................................................... ±10 %, ± 2 kΩ
Measured value load current (as % of the set response value) ............................. 10 %…199 %
Operating error ......................................................................................................... ±5 %, ±0.2 A
Password ................................................................................................. on, off / 0…999 (off, 0)*
Interface for MK7
Cable length, twisted pairs, shielded ................................................................................. ≤200 m
Recommended cable ....................... min. J-Y(St)Y 2x2 x 0.6; shield on one side connected to PE
Power supply (terminals 1 and 2):
Uaus ...................................................................................................................................... DC 24 V
Imax (max. 4 MK7) ................................................................................................................. 80 mA
Communication (terminal 3 and 4):
Interface/protocol ............................................................ RS-485 / proprietary interface (no BMS)
Terminating resistor ..............................................................120 Ω (0.25 W), internal, switchable
Technische Daten IR427
Isolationskoordination nach IEC 60664-1 / IEC 60664-3
Bemessungsspannung ............................................................................................................ 250 V
Bemessungs-Stoßspannung / Verschmutzungsgrad ........................................................ 4 kV / III
Sichere Trennung (verstärkte Isolierung) zwischen..........................................................................
................................................................................ (L1, L2, E, KE, 1, 2, 3, 4, Z, Z/k, I) - (11, 12, 14)
Spannungsprüfung nach IEC 61010-1 ................................................................................... 2,2 kV
Versorgungsspannung
Versorgungsspannung Us........................................................................................................ = Un
Eigenverbrauch ..................................................................................................................... ≤4 VA
Überwachtes IT-System
Netznennspannung Un............................................................................................ AC 70…264 V
Nennfrequenz fn............................................................................................................. 47…63 Hz
Isolationsüberwachung
Ansprechwert Ran ........................................................................................ 50…500 kΩ (50 kΩ)*
Ansprechabweichung ........................................................................................................... ±10 %
Hysterese .................................................................................................................................. 25 %
Ansprechzeit tan bei RF= 0,5 x Ran und Ce= 0,5 μF............................................................... ≤5 s
Zulässige Ableitkapazität Ce...................................................................................................... 5 μF
Messkreis
Messspannung Um................................................................................................................. ±12 V
Messstrom Im(bei RF= 0
Ω
) ............................................................................................. ≤50 μA
Gleichstrominnenwiderstand Ri........................................................................................ ≥240 kΩ
Impedanz Zibei 50 Hz ....................................................................................................... ≥200 kΩ
Zulässige Fremdgleichspannung Ufg ............................................................................ ≤DC 300 V
Laststromüberwachung
Ansprechwert einstellbar ...................................................................................... 5…50 A (7 A)*
Ansprechabweichung ............................................................................................................ ± 5 %
Hysterese .................................................................................................................................... 4 %
Einstellwerte Laststrommessung:
Trafo................. 3150VA ....... 4000VA ....... 5000VA ........6300VA ....... 8000VA ..... 10000 VA
Ialarm 1~ .................. 14A .............. 18A .............. 22A .............. 28 A ............. 35A ............. 45 A
Ansprechzeit Überlast (50 % auf 120 %) ................................................................................< 5 s
Ansprechzeit Wandlerüberwachung ..............................................bei Neustart, Test oder alle 1 h
Temperaturüberwachung
Ansprechwert (Festwert) .......................................................................................................... 4 kΩ
Rückfallwert (Festwert) .......................................................................................................... 1,6 kΩ
Kaltleiter nach DIN 44081 ........................................................................................ max. 6 in Reihe
Ansprechzeit Übertemperatur ..................................................................................................< 2 s
Ansprechzeit Anschlussfehler Kaltleiter....................................................................................< 2 s
Anzeigen, Speicher
Anzeige LC-Display .......................................................................... multifunktional, unbeleuchtet
Messwert Isolationswiderstand ................................................................................ 10 kΩ…1 MΩ
Betriebsmessabweichung ..................................................................................... ± 10 %, ± 2 kΩ
Messwert Laststrom (in % vom eingestellten Ansprechwert) ..............................10 %…199 %
Betriebsmessabweichung ...................................................................................... ± 5 %, ± 0,2 A
Passwort ................................................................................................. on, off / 0…999 (off, 0)*
Schnittstelle für MK7
Leitungslänge, paarweise verdrillt, geschirmt .................................................................. ≤200 m
Empfohlene Leitung ............................................. min. J-Y(St)Y 2x2 x 0,6; Schirm einseitig an PE
Stromversorgung (Klemme 1 und 2):
Uaus ....................................................................................................................................... DC 24 V
Imax (max. 4 MK7) .................................................................................................................. 80 mA
Kommunikation (Klemme 3 und 4):
Schnittstelle/Protokoll ..................................................................... RS-485 / proprietär, kein BMS
Abschlusswiderstand .................................................................. 120 Ω (0,25 W), intern, schaltbar