Magvatech
Automatic Circuit Reclosers
An auto recloser clears a transient fault and restores supply by itself, so a feeder does not stay down waiting for a crew. We supply three models covering 15.5kV through 38kV.
The range
Three voltage classes on one control platform. The REC15 and REC25 share a tank and cabinet form factor; the REC35 uses separate pole-mounted interrupters on a galvanised beam.
Technical parameters
Most faults on an overhead line are transient, and an auto recloser exploits that by re-closing automatically instead of locking out. All three models share the same protection philosophy and control platform; the differences are voltage class, current rating and fault duty.
| Parameter | REC15 | REC25 | REC35 |
|---|---|---|---|
| Rated maximum voltage (Ur) | 15.5 kV | 27 kV | 38 kV |
| Rated continuous current (Ir) | 800 A | 800 A | 1250 A |
| Short-circuit breaking current (Isc) | 16 kA | 12.5 kA | 16 kA |
| Peak withstand current (Ip) | 41.6 kA | 32.5 kA | 65 kA |
| Short-time withstand current (Ik) | 16 kA | 12.5 kA | 25 kA |
| Duration of short circuit (tk) | 4 s | 4 s | 3 s |
| Lightning impulse withstand (Up) | 110 kV | 125 / 150 kV | 170 kV |
| Mechanical life | 30 000 CO | 30 000 CO | 30 000 CO |
| Closing time, max | 77 ms | 77 ms | 82 ms |
| Opening time, max | 43 ms | 43 ms | 43 ms |
| Clearing time, max | 51 ms | 51 ms | 51 ms |
| Degree of protection | IP65 | IP65 | IP66 |
| Weight | 68 kg | 72 kg | 95 kg |
Figures taken from the Magvatech REC15/25_Al1_5p (v8.0) and Rec35_Smart5_5p (v8.2) technical manuals. Switching modules are designated OSM15_Al_1, OSM25_Al_1 and the Rec35 outdoor module respectively.
Common to all three models
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Rated operating sequence
O-0.1s-CO-2s-CO-2s-CO, per IEC 62271-111 and IEEE C37.60.
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Magnetic actuator
No spring charging mechanism to maintain. The Rec35 uses a monostable magnetic actuator.
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Operating temperature
Rated from −40°C to +55°C, at up to 100% condensing humidity.
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Altitude
REC15 and REC25 are rated to 2000 m, the Rec35 to 4500 m, with derating per ANSI C37.60 applied above 1000 m.
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Pollution level
Rated for very heavy pollution per IEC 60815, which suits coastal and industrial installations.
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Supply and backup
85 to 265 V AC or 110 to 220 V DC, with up to 48 hours of operation from the internal battery if auxiliary supply is lost.
Control, measurement and communications
RC5_4 recloser control
Each recloser ships with the RC5_4 control cabinet, rated IP65 (IP66 on the Rec35). It carries the protection functions, the measurement system and the communications modules, and runs the operating sequence.
Digital input and output modules are available in two variants: IOM-04 for 12 to 60 V DC signalling, and IOM-03 for 110 to 220 V DC.
Measurement accuracy
Phase current measurement is accurate to the greater of ±1% or ±2 A on the REC15 and REC25, across 0 to 800 A. Voltage measurement is accurate to the greater of ±1% or ±0.1 kV.
Communications options include a 10/100 wired Ethernet port, an optical Ethernet module and a Wi-Fi module with WPA/WPA2 security and roughly 50 m range for on-site configuration.
What we do with them
Supply is only the first step. We handle the rest.
Installation
Pole mounting, control cable routing, VT installation, earthing and integration into the existing network.
Installation servicesTesting & Commissioning
Secondary injection testing, protection relay configuration, functional testing and a commissioning report.
Testing & commissioningMaintenance & Support
Routine inspection, fault finding, firmware and configuration updates, and breakdown support.
Maintenance & supportNeed reclosers for your network?
Tell us what you need and we will come back to you with a clear quote.