OSM — solid-insulated vacuum recloser, 15.5 / 27 / 38 kV, 800 A
OSM is an automatic vacuum recloser with solid polymer insulation for distribution networks of the 15, 27 and 38 kV classes with a rated current of 800 A. The device contains no oil or SF6 gas and is designed for 30 years of maintenance-free operation. It is installed on overhead lines as a sectionaliser, a remotely controlled circuit breaker or a generation connection breaker.
- Maximum operating voltage
- 15.5 / 27 / 38 kV
- Rated current
- 800 A
- Rated short-circuit breaking current
- 16 kA (OSM15, OSM38-16); 12.5 kA (OSM27, OSM38-12)
- Short-circuit making current (peak)
- 40 kA (16 kA models); 31.5 kA (12.5 kA models)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The OSM recloser is hand-assembled and tested in Brisbane (Australia). Arc extinction is by vacuum, and the interrupters have radial magnetic field contacts. The poles are cast from aromatic epoxy compound and housed in a sealed stainless steel tank with a grey powder coating, so the insulation is not affected by ultraviolet light. The operating mechanism consists of interlocked fast magnetic actuators. There is no active electronics in the tank, which increases the device's resistance to overvoltages.
The model range includes four versions. The OSM15-16-800 is rated 15.5 kV and 16 kA, the OSM27-12-800 27 kV and 12.5 kA, and the OSM38-12-800 and OSM38-16-800 38 kV and 12.5 or 16 kA respectively. The rated current of all models is the same, 800 A. The short-circuit making current is 40 kA for the 16 kA models and 31.5 kA for the 12.5 kA models. The phase-to-earth lightning impulse test voltage is, depending on the model, 110, 150, 195 or 200 kV, and the power-frequency voltage is 50, 60 or 70 kV. The mechanical endurance and the endurance at rated current are 30 000 operations, and the mass of the three-phase tank is 100, 109 or 150 kg.
The standard package includes three built-in current transformers and six voltage sensors on the source side and the load side. Therefore bidirectional operation, synchronism check and automation are available without additional options. A version with matched CTs gives earth-fault protection sensitivity of 0.2 A. The architecture comes in four variants: three-phase with a common operating mechanism for three-wire networks, two-phase for two-wire single-phase lines, single-phase for SWER networks, and three-phase with per-phase control Single Triple for four-wire overhead lines.
The patented design with venting of internal arc gases, confirmed by type tests, directs the arc energy upward, away from personnel. There is a Hot Line Tag function, a mechanical trip lockout linked directly to the tank mechanism, and dual position-indicator microswitches.
The recloser is controlled by an RC series cabinet connected by an armoured shielded cable 4 to 20 m long with IP65 connectors. The device is used as a substation circuit breaker, for connecting generation and renewables, for protecting mining equipment, in automatic transfer (ATS) and Smart Grid schemes, in mobile switchgear and at the transition from a cable line to an overhead line. Operating temperature is from −40 to +55 °C, installation altitude is up to 3000 m, and above 1000 m with a derating according to ANSI C37.60-2012.
Technical specifications
| Maximum operating voltage | 15.5 / 27 / 38 kV |
|---|---|
| Rated current | 800 A |
| Rated short-circuit breaking current | 16 kA (OSM15, OSM38-16); 12.5 kA (OSM27, OSM38-12) |
| Short-circuit making current (peak) | 40 kA (16 kA models); 31.5 kA (12.5 kA models) |
| Mechanical endurance / at full load | 30 000 operations |
| Lightning impulse withstand voltage, phase-to-earth | 110 / 150 / 195 / 200 kV |
| Power-frequency test voltage | 50 / 60 / 70 kV |
| Sensors | 3 current transformers, 6 voltage sensors |
| Phase configurations | three-phase, two-phase, single-phase (SWER), Single Triple |
| Operating temperature range | from −40 to +55 °C |
| Installation altitude | up to 3000 m |
| Tank mass (three-phase) | 100 / 109 / 150 kg |
| Service life | 30 years |
Request a price and lead time
OSM — solid-insulated vacuum recloser, 15.5 / 27 / 38 kV, 800 A. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8535 21 00 00 |
|---|---|
| HS, 6 digits | 8535 21 |
| CN (EU) | 8535 21 00 |
| HTSUS (USA) | 8535 21 00 00 |
| China customs tariff | 8535 21 00 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What voltage classes is the OSM recloser made for?
The OSM15, OSM27 and OSM38 models are designed for a maximum operating voltage of 15.5, 27 and 38 kV. The rated current of all versions is 800 A, and the short-circuit breaking current is 12.5 or 16 kA.
Which phase configurations are available?
Three-phase with a common operating mechanism, two-phase, single-phase for SWER networks, and three-phase with per-phase control Single Triple for four-wire overhead lines.
Does the OSM require maintenance in service?
Vacuum arc extinction and solid insulation without oil and SF6 are designed for 30 years of service without maintenance. The mechanical endurance is 30 000 operations.
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