Knowledge Base › Current Transformers (CT)
LEM ARH-B22-D70
Manufacturer documented GLOBAL verified Sept. 25, 2026
Identity
| category | current_transformers |
| manufacturer | LEM |
| model | ARH-B22-D70 |
| product_status | active |
| region | GLOBAL |
| variant | — |
Electrical
| accuracy_class |
0.5
disputed
ARH - Rogowski coil
|
| accuracy_standard |
IEC 61869-10
ARH - Rogowski coil
|
| aperture_mm |
70
disputed
ARH - Rogowski coil
|
| bidirectional | True |
| cable_length_m |
1
ARH - Rogowski coil
|
| ct_type |
rogowski
ARH - Rogowski coil
|
| max_current_a | 65.0 |
| measurement_type | Current Transformer (CT) |
| official_product_url |
https://www.lem.com/en/arh
ARH - Rogowski coil — inventory record source_url
|
| output_cable_length_m |
1.0
ARH - Rogowski coil
|
| phase_count | 1 |
| primary_current_a |
1000
ARH - Rogowski coil
|
| primary_nominal_current_a | 1000 |
| secondary_voltage_mv |
22.5
ARH - Rogowski coil
|
| sensitivity | 22.5 mV/kA |
| sensitivity_mv_per_ka |
22.5
ARH - Rogowski coil
|
| split_core |
True
ARH - Rogowski coil
|
| voltage_rating_v | 230.0 |
Physical / mechanical
| mounting | DIN-rail |
Environment
| ip_rating |
IP57
ARH - Rogowski coil
|
| operating_temperature_max_c |
105
ARH - Rogowski coil
|
| operating_temperature_min_c |
-40
ARH - Rogowski coil
|
| operating_temperature_range_c | -40 to 105 |
Interfaces & connectors
| communication | RS485 Modbus RTU |
Protection
| protection_degree_ip | IP57 |
Certifications
| certifications | IEC 61010-1:2010/AMD1:2016, IEC 61010-2-032:2012, IEC 61869-10:2017, UL 61010-1:2016, UL 61010-2-032:2012, UL 2808 |
| standards |
['IEC 61010-1:2010/AMD1: 2016', 'IEC 61010-2-032: 2012', 'IEC 61869-10: 2017', 'UL 61010-1: 2016', 'UL 61010-2-032: 2012', 'UL 2808']
ARH - Rogowski coil
|
Documents
product_page
ARH - Rogowski coil
Recorded conflicts
electrical.aperture_mm Review required
70 — stored value
70 minimum sensing aperture — incoming package
Detected during import deep-enrich-pass2-2026-09-batch05
electrical.accuracy_class Review required
0.5 — stored value
Class 0.5 per IEC 61869-10 — incoming package
Detected during import deep-enrich-pass2-2026-09-batch05
Additional documented parameters
Recorded verbatim from the source; no schema field exists for these yet.
| builder_completeness | partial |
| region_notes | One worldwide LEM product page; no regional variants published. |