6/10 kV recloser NOJA OSM15 — pole-mounting kit

What a recloser is

A recloser is a vacuum circuit breaker with auto-reclosing that is installed directly on an overhead-line pole. It divides a 6 or 10 kV line into sections. On a transient fault (flashover from a branch, a bird or lightning) the recloser trips the line and closes it again after a pause — up to three auto-reclosing cycles. If the fault is permanent, it stays open and isolates the faulted section, while the rest of the line up to the recloser stays energised. The 10 kV recloser and the 6 kV recloser in our kit are the same NOJA Power OSM15 device: the module is designed for voltage classes up to 15 kV.

What we supply

The NOJA OSM15 recloser as a kit for mounting on a 6–10 kV overhead-line pole. From NOJA Power we receive only the recloser itself — the OSM15 switching module with the RC-10ES control cabinet. The brackets, mounting frames, crossarms, metering and auxiliary cabinets we make ourselves from galvanized sheet steel. The auxiliary supply transformer, surge arresters, an RLK-10 or RLND-10 disconnector and the cables we source and assemble ourselves — for the chosen installation option and pole type.

Recloser as a 6–10 kV overhead-line sectionalizing point

• a line sectionalizing point with one-sided supply;
• a line sectionalizing point with two-sided supply;
• a connection point to the overhead line together with a commercial metering point;
• a sectionalizing or connection point with two-sided supply on two poles.

What the control cabinet does

The RC-10ES cabinet combines protection relaying, telecontrol and data recording in one device. Protection — four groups of freely programmable bidirectional protection elements: overcurrent, voltage, phase-to-phase fault and earth fault, sensitive earth fault, frequency, harmonics, power. Automation: auto-reclosing with up to three cycles and automatic transfer of the control cabinet auxiliary supply. Logs of events, protection setting changes, secondary circuit status and current values; recording of voltage sags and swells.

Communication: RS232, USB and Ethernet ports; GSM/GPRS, 3G/4G and radio modems, an optical media converter; DNP3, IEC 60870-5-101, IEC 60870-5-104 and IEC 61850 protocols. This lets the recloser be connected to the control-room SCADA and operated remotely.

Other equipment of this voltage class is in the 6–10 kV equipment section.

Kit content

Switching module

NOJA Power OSM15: vacuum interrupters in the poles with solid dielectric insulation, a powder-coated stainless steel housing with a vent for gases in case of an arc fault, bushings made of UV-resistant silicone elastomer;

Control cabinet

NOJA Power RC-10ES — protection, automation, telecontrol, a storage battery; a powder-coated stainless steel housing, a top with a ceramic insulating coating, a vandal-proof cable entry and a three-point lock;

Sourced and assembled by us

an auxiliary supply transformer for the control cabinet (10 kV/220 V or 6 kV/110 V), surge arresters, an RLK-10 or RLND-10 disconnector, the connecting cable between the module and the control cabinet and other cables;

Steelwork — ours

brackets for the module and the auxiliary supply transformer, mounting frames, crossarms, metering and auxiliary cabinets, pole fixings — from galvanized sheet steel, for the pole type and the installation option.

Four installation options

1. Sectionalizing point, one-sided supply. The recloser on one pole, one auxiliary supply transformer, surge arresters on both sides of the module, the control cabinet lower on the same pole.
2. Sectionalizing point, two-sided supply. The line can be energised from either side of the recloser, so there are two auxiliary supply transformers — one on each side of the module.
3. Connection to the overhead line with a commercial metering point. The recloser together with a PKO-10 commercial metering point and an RLK-10 disconnector on a common mounting frame between two poles: switching, metering and a visible break in one assembly. We make the PKO-10 ourselves as well.
4. Installation on two poles. A sectionalizing or connection point with two-sided supply on two poles: two auxiliary supply transformers, the control cabinet on one of the poles.

Mounting is on trapezoidal and round reinforced-concrete poles of the SV and SK types. If your pole is of another type, state it in the request: we will make the steelwork for it.

Earthing

Requirements of the standard application solutions: the earthing resistance must not exceed 10 Ω; the module, the control cabinet and the auxiliary supply transformer are connected to earth with a copper conductor of at least 35 mm².

Main parameters of the kit

Device parameters follow the standard OSM15 application solutions (device manufacturer — NOJA Power); the steelwork is made for the installation option.

The final kit content is agreed on request.

How we work

• the request: network voltage 6 or 10 kV, one-sided or two-sided supply, whether metering is needed, pole type, quantity;
• choice of the installation option and the kit content;
• manufacture of brackets, frames, crossarms, metering and auxiliary cabinets from galvanized sheet steel at our own plant;
• sourcing and assembly: the NOJA Power OSM15 recloser with the RC-10ES control cabinet, the auxiliary supply transformer, surge arresters, the disconnector, cables;
• supply of the assembled kit for pole mounting.

What the price depends on

Price on request. It is set by the installation option (one or two auxiliary supply transformers, with or without a PKO-10 metering point, on one or two poles), the network voltage, the pole type, the communication modules in the control cabinet, the connecting cable length and the amount of steelwork.

Questionnaire for a quote →

Warranty

The NOJA Power OSM15 recloser itself — 1 year. Our cabinets and kit assembly — 5 years, steelwork — 10 years.

Related equipment

For energy metering at the point of supply demarcation — the PKO-10 commercial metering point. Other equipment of the class is in the 6–10 kV equipment section.

The NOJA OSM15 6/10 kV recloser is a vacuum circuit breaker with auto-reclosing for 6 and 10 kV overhead lines, mounted on the pole. We supply it as a kit: from NOJA Power we receive only the recloser itself — the OSM15 module with the RC-10ES control cabinet; we make the brackets, mounting frames, crossarms, metering and auxiliary cabinets ourselves from galvanized sheet steel and source and assemble the auxiliary supply transformer, surge arresters and cables. The module's rated current is 800 A, the breaking current is 16 kA, protection is IP65; the control cabinet is IP66 and works from −40 to +55 °C. Four installation options, one with a PKO-10 metering point. Price on request.