TECHNO-ELEC
Hall 11.2
Booth 270-W
#VOLTAGERELAY #ELECTROMAGNETICRELAY #CURRENTRELAY
# DIFFERENTIALRELAY #ONBOARDAPPLICATION #TRACKSIDEAPPLICATION
about us
TECHNO-ELEC specialises in designing, manufacturing and selling measuring relays, known as ‘responsive relays’.
TECHNO-ELEC is a key partner of electrical traction (metros, tramways, trains, high-speed trains, substations).
Manufacture products for both on-board and trackside applications.
Services / Studies
• Measurement relay design, voltage, current, differential or for specific application, based on Servo-Contact technology
• Consulting and expertise on choice of features to size the product according to customer needs
Production & Marketing
• Development, manufacture and sale / Aftersales Service
• Preventive maintenance (product functional checks)
• Curative maintenance (expertise and repair, change of worn parts)
• Specific maintenance contracts
Main Characteristics
• Operation fields: from 1mA to 15,000A / from 10mV to 4,000V (AC/DC)
• Dielectric strength: up to 20,000V 50Hz- 1 min (primary circuit/secondary circuit)
• High overloads on measuring circuit
• Fire resistance according to standards NF F16-101- 102 & EN 45545
• Fully operational whatever the direction
Relay Categories
• Current relays: they are used in applications such as current detection, threshold control, overload detection, ground fault detection, engine start, etc.
• Voltage relays: they are used in applications such as voltage detection, catenary voltage detection, threshold control, voltage monitoring of battery chargers, etc.
• Differential relays: they are used in applications such as DC or AC current differential protection, AC or DC voltage differential protection, etc.
• Custom relays: associated to electronics, we can create more specific relays, such as time-relays on closing or tripping, flashing relays, clipper time relays, etc.
Ground fault detection relay
For trackside installations, this ground fault detection relay measures the DC current from the frame to the ground.
Mainly installed in metro and tram DC substations, the relay is connected between the ground and the cubicle frame. In the event of an isolation failure, the fault current flows through the relay that picks it up. No auxiliary power is required.
As an option, a permanent magnet gives the relay the ability to stay engaged even if the defect disappears, a top button allows manual rearmament. With this option, the relay can detect both AC and DC current.
- Options available
- Contacts 1 inverter or 1 N/O-1N/C
- Agpd or Tungsten Metallurgy
- Magnetic hooking at work
Voltage relay
These relays are used in applications such as voltage detection, catenary voltage detection, threshold control, voltage monitoring of battery chargers, etc.
In these kinds of relays, the winding varies between 100 and 40000 ohms, which are fully pressurized and vacuum impregnated. These relays cover a current range from 10mV to 10 000 Volts.
In trackside installations, for DC traction networks (750 | 1500 | 3000 Vdc), this relay is used to detect the presence of catenary voltage in the cells from the rectifier. The high insulation resistance (up to 12 KV 50hz) offers a high resistance to overvoltage, especially natural phenomena (lightning). In addition, no auxiliary power is required
Differential ground fault detection relay
In on-board applications, direct ground access is unavailable, which is why a differential current relay is used to detect leaks by comparing the incoming and outgoing electric traction circuit lines or the current imbalance in the braking system. It is mounted between the main rectifier and the inverter and also between the rectifier and the auxiliary inverter. It is installed on metros, trams and diesel locomotives.
Differential ground fault detection relay, high power
In on-board applications, direct ground access is unavailable, which is why a differential current relay is used to detect leaks by comparing incoming and outgoing electric traction circuit lines. As example, this relay is mounted on BB26000 locomotives. In addition, an 11 kAdc overload current relay is mounted on the main busbar to trip the main circuit breaker to avoid overall overload in the locomotive
CONTACT US
Z.I de la castine, 54730 Gorcy – FRANCE
Email : andre.provot@techno-elec.com
Tel : +33 (0)382899901
Mobile : +33 (0)680725026
https://techno-elec.com/