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Fault codes › CPS › CPS SCA100K-T-US-480 / SCA50K-T-US-208

CPS SCA50-100K-T Protect0190

Code: Protect0190
Shown as: ISO Low
Vendor severity: Protection
Page: 134
ID: fc:chint-sca-50-100k-t-protect190
IRI: https://solarlattice.org/kb/fc/chint-sca-50-100k-t-protect190
Status: active
Also known as: Protect0190, protect190, CPS Protect0190, ISO Low
Category: Inverters

Class fault drafted · lead

Production not stated

Clears not stated

Decoded

Reports low insulation resistance; look at PV array, DC cable; confirm with fault localization; do: DC wiring check, contact manufacturer service.

What can be behind Low insulation resistance

Failure modes that present as the reported condition, and the tests that tell them apart.

Defined in

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 — CPS (Chint Power Systems) · page 134 drafted · lead
- tbl=52.r3 h=f29a32afae43

The manufacturer's own cause and corrective text is not reproduced here.

Same condition on other equipment

ABB / FIMER: ABB / FIMER PVS-166-175-TL E025, ABB / FIMER PVS-166-175-TL E037, ABB / FIMER PVS-60-TL E025, ABB / FIMER PVS-60-TL E037, ABB / FIMER TRIO-20.0-27.6-TL E025, ABB / FIMER TRIO-20.0-27.6-TL E037, ABB / FIMER UNO-DM-3.3-5.0-PLUS E025, ABB / FIMER UNO-DM-6.0-PLUS E025
CPS: CPS SCA25KTL-208 IsolationErr, CPS SCA25KTL-480 IsolationErr, CPS SCA36KTL IsolationErr, CPS SCA50-60KTL IsolationErr, CPS SCH100-125KTL IsolationErr, CPS SCH125KTL-AIO IsolationErr, CPS SCH200-250K-T IsolationErr, CPS SCH275KTL IsolationErr, CPS SCH350KTL IsolationErr
Canadian Solar: Canadian Solar 125K-T600GL02 PV ISO-PRO 01/02, Canadian Solar 125K-T600GL02 PV-MID-ISO, Canadian Solar 185-255K PV ISO-PRO 01/02, Canadian Solar 23-28KTL-CT IsolationErr, Canadian Solar 25-40K-T480GL01 PV ISO-PRO 01/02, Canadian Solar 50-66K-T480GL01 PV ISO-PRO 01/02, Canadian Solar 75-100K-T480GL02 PV ISO-PRO 01/02
Enphase: Enphase IQ7 DC Resistance Low - Power Off, Enphase IQ8 DC Resistance Low - Power Off, Enphase IQ9N DC Resistance Low - Power Off, Enphase M215-M250 DC Resistance Low - Power Off
Fronius: Fronius Galvo 502, Fronius Primo 447, Fronius Primo 502, Fronius Symo 447, Fronius Symo 502
Huawei: Huawei SUN2000-100KTL-USH0 2062, Huawei SUN2000-25-30KTL-US 313, Huawei SUN2000-45KTL-US-HV-D0 313
KACO new energy: KACO new energy blueplanet TL3 181, KACO new energy blueplanet TL3 182, KACO new energy blueplanet TL3 183
SMA: SMA SB-US-40 3501, SMA SB-US-41 3501, SMA SBSE-US-50 3501, SMA PEAK3-US 3501, SMA CORE1-US 3501, SMA STP-TL-US 3501, SMA STP-X-US 3501, SMA SC-CP-XT 3501, SMA SC-CP-XT 3504, SMA SC-CP-XT 3510, SMA SC-CP-XT 3511
Schneider Electric: Schneider Electric CL125 039, Schneider Electric CL125 055
Solis: Solis 1P-4G-US PV ISO-PRO 01/02, Solis 3P-5G-US PV ISO-PRO 01/02, Solis RHI-1P-HV PV ISO-PRO 01/02, Solis S5-GC PV ISO-PRO 01/02, Solis S6-EH1P PV ISO-PRO 01/02, Solis S6-GC PV ISO-PRO 01/02, Solis S6-GU PV ISO-PRO 01/02
Sungrow: Sungrow SG-CX-US 039, Sungrow SG200HX 039, Sungrow SG250HX 39, Sungrow SG350HX 039
Yaskawa Solectria: Yaskawa Solectria PVI-25TL-R IsolationErr, Yaskawa Solectria PVI-TL IsolationErr

Claims

`defined_in`

c1 drafted · lead CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

`has_event_class`

c2 drafted · lead Fault (device stops or needs intervention)

from the code prefix

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

`reports`

c3 drafted · lead Low insulation resistance

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

review note: support check: partial - 'Isolation Voltage Low' with leakage-to-earth tracing implies low insulation, but the passage doesn't say insulation resistance explicitly.

`affects`

c4 drafted · lead PV array

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

c5 drafted · lead DC cable

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

review note: support check: partial - The procedure traces the wiring of the faulted string for leakage, which implies the DC cabling, but cables aren't named explicitly.

`detected_by`

c6 drafted · lead Fault localization

Reconnect strings one at a time to find the string that triggers the alarm.

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

`mitigated_by`

c7 drafted · lead DC wiring check

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

c8 drafted · lead Contact manufacturer service

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

`applies_to`

c9 drafted · lead CPS SCA100K-T-US-480 / SCA50K-T-US-208

CPS SCA100K-T-US-480 SCA50K-T-US-208 User Manual Rev 1.0 tbl=52.r3 h=f29a32afae43

Data