Description
The terminal cabinet of the KMG trademark, manufactured in accordance with TU 27.12.31-010-19394148-2018 (hereinafter “KSh.KMG”, “the product”), is intended for use in cathodic protection systems (CP), as well as for:
- connecting the drainage cable of the protected structure and cathodic protection stations (CP stations) with the connected anode grounding devices;
- distribution and measurement of anode grounding device currents;
- connection of corrosion rate indicator plate units (BPI), reference electrodes, PKM.KMG corrosion monitoring subsystems, and other devices.
KSh.KMG is manufactured in accordance with TU 27.12.31-010-19394148-2019 “Corrosion monitoring subsystem PKM.KMG with additional devices: drainage protection station SDZ.KMG, cathodic protection station SKZ.KMG, automatic reserve switching unit AVR.KMG, block-complete CP devices BKU.EHZ.KMG, high-voltage input UKZV.KMG, terminal cabinet KSh.KMG”.
KSh.KMG complies with protection class 01 for personnel electric shock safety according to GOST 12.2.007.0-75 and is designed for continuous operation.
The design of KSh.KMG ensures operation when installed:
- outdoors (location category 1 according to GOST 15150);
- under a canopy or indoors (location category 2 according to GOST 15150).
KSh.KMG, depending on the version, complies with climatic categories U, UHL or HL with location categories 1 or 2 according to GOST 15150 and maintains its parameters under external climatic conditions:
- for climatic category U – temperatures from −45 °C to +40 °C;
- for climatic category UHL or HL – temperatures from −60 °C to +40 °C;
- relative humidity up to 98 % at 25 °C;
- atmospheric pressure from 86.6 to 106.7 kPa (650–800 mmHg);
- operation in atmospheres of types I–III.
Enclosure protection rating depends on configuration:
- not lower than IP34 according to GOST 14254-96 — for units with ventilation grilles;
- not lower than IP65 according to GOST 14254-96 — for units without ventilation grilles.
Structure of the KSh.KMG designation
KSh.KMG – X(XA) – X ES – X BPI – X – XXX
| Climatic category | |||||
| Telemetry data transmission (modification specified when ordering) | |||||
| Number of connected corrosion rate sensors | |||||
| Number of connected reference electrodes | |||||
| Number of connected anode grounding devices (channel current, A) | |||||
| Terminal cabinet. Manufacturer: KM GROUP | |||||
Installation and operation must be carried out in accordance with approved and current regulatory, technical, and design documentation on cathodic protection and grounding systems.
The service life of KSh.KMG is at least 20 years.
The cabinet design is vertical with bottom cable entry.
The main technical characteristics of the KSh.KMG terminal cabinet are shown in the table:
| No. | Characteristic | Unit | Value |
| 1 | Number of connected anodes | pcs. | As ordered |
| 2 | Maximum current of one anode | A | As ordered |
| 3 | Total permissible current of anode circuit | A | As ordered |
| 4 | Number of measurement circuits from reference electrodes with potential sensor | pcs. | As ordered |
| 5 | Number of connected corrosion rate indicator plate units | pcs. | As ordered |
| 6 | Number of 1 A shunts | pcs. | As ordered |
| 7 | Number of 10 A shunts | pcs. | As ordered |
| 8 | Additional devices | pcs. | As ordered |
| 9 | Climatic category according to GOST 15150-69 | – | UHL |
| 10 | Location category according to GOST 15150-69 | – | 1 |
| 11 | Enclosure protection rating according to GOST 14254-2015 | – | IP65 |
| 12 | Weight, max. | kg | 45 |
| 13 | Overall dimensions, max. | – | 320×430×240 mm |
Dimensions may vary depending on configuration.
The cabinet supports cable termination with ring-type cable lugs:
- from the protected structure to the negative terminal and from the CP station to the positive terminal, a cable with a cross-section of 35 mm² with tinned copper lugs TML (TML-35-8) according to GOST 7386-80 is recommended;
- from anodes, a cable with a cross-section of 16 mm² with TML-16-8 lugs is recommended;
- from reference electrodes with potential sensor, control cable of the protected structure, and corrosion rate indicator plate units, a 2.5 mm² cable with insulated ring lugs NKI-2.5-6 is recommended.
Cable lugs are not included in the scope of supply.
Scope of supply
- Terminal cabinet – 1 pc;
- Key – 1 pc;
- Passport with operating manual – 1 pc;
- Wiring diagram of the cabinet terminal panel – 1 pc.
Installation and operation
Delivery should be performed in the manufacturer’s packaging.
Unpacking must be performed using tools that prevent damage and preserve marking. The cabinet must be connected according to the design documentation, KSh.KMG wiring diagram, and terminal marking.
Before installation and commissioning, perform an external inspection and verify completeness.
Cable connections must be made according to the wiring diagram and terminal marking.
The circuit diagrams are standard for all cabinet modifications depending on the customer’s technical specification (number of anodes, measurement circuits from reference electrodes, potential sensors, and corrosion rate sensors).
To measure the channel current, a DC measuring device designed to operate with a 75 mV shunt must be connected to the measurement terminals (ZMZ).
The current I (A) through the shunt is calculated as:
I = U × Ish / Ush,
where U is the measured voltage (mV),
Ish is the nominal shunt current (A),
Ush = 75 mV is the nominal shunt voltage.
The cabinet design ensures continuous operation for 6 months without maintenance. During preventive maintenance, the tightness of terminal screw connections must be checked and tightened if necessary.
| Fault / manifestation | Possible cause | Corrective action |
| No current through the unit | Open circuit | Check electrical connections and restore continuity |
| Unstable measurement readings | Poor cable-to-terminal contact | Check terminal tightening and quality of ring-lug crimping |
Warranty obligations
The manufacturer guarantees compliance of the products with technical requirements provided that transportation, storage, and operation conditions are observed.
Warranty period: not less than 36 months from commissioning.
Storage period in manufacturer’s packaging before commissioning: not less than 3 years.
The product must be stored indoors free from aggressive substances causing corrosion.
We offer the KSh.KMG terminal cabinet on the KM GROUP website.
