Shock Monitoring on pantograph

Applications

Location: Le Mans, France

Site monitored since: June 2012

overall tasks

A serious failure of pantograph can not only damage contact wires but can also inflict widespread damage on the catenary system network.

Pantographs are subject to regular inspection at rolling stock depots, but some failures are difficult to detect by the visual checks. In addition, visual check at the depots cannot directly help to quickly detect pantograph failures in operation. A cost-effective and real-time monitoring system during train operation was required by the railway operator.

Our wireless shock sensors (Ref: Beandevice® 2.4GHz AX-3DS) were used to monitor in real-time pantograph defects during train operation.

Thanks to our Smart Shock Detection Mode (SSD), the wireless monitoring system can wakeup on a shock trigger and transmit an alarm notification to field workers.

OPERATION MODE :

• DAQ Mode: Smart Shock Detection Mode

• Shock thresholds: Shock threshold 5g and 6g, time-hysteresis 5ms

• Battery life: 12-14 days with 30-40 shock events per day

EQUIPMENT USED

« IOT Gateway Outdoor-Version, Ethernet Link, 2.4GHz sensor series »

Caption 2: Wireless IOT sensors coordinator

( BeanGateway® 2.4GHz Ethernet Outdoor )

BeanScape® 2.4GHz Basic - Wireless sensor networks supervision software

Caption 1: Wireless IOT sensors supervision software ( Ref: BeanScape® 2.4GHz Basic )

« wireless IOT shock sensor, 2.4GHz sensor series »

Caption 3: Wireless IOT shock sensors

( BeanDevice® 2.4 GHz AX-3DS )

Figure 1: Shock sensor (Ref: Beandevice® AX-3DS) is mounted on train pantograph’s damper

Caption 4: Wireless IOT shock and impact sensor (Ref: Beandevice® 2.4GHz AX-3DS) is mounted on train pantograph’s damper

Figure 2: BeanGateway® (Wireless Coordinator) deployment inside suspended ceiling

Caption 5: Wireless IOT sensors ( BeanGateway® 2.4GHz ) is installed inside suspended ceiling

Figure 3: High shock on the Vertical Z-axis (red color)

Caption 6: High shock on the Vertical Z-axis (red color)

Figure 4: Train Pantograph (Overhead line with 25kV AC )

Caption 7: Train Pantograph (Overhead line with 25kV AC )

Figure 5: Two consecutive shocks on section insulator

Caption 8: Several consecutive impacts recorded on train pantograph.

Figure 6: Catenary deformation at REIMS train station

Caption 9: Catenary deformation at REIMS train station

Caption 10: Damaged carbon contact band

Caption 11 : The Beandevice® 2.4GHz AX-3DS passed successfully all the EMC Stress tests performed by the end user SNCF (French Railway):

• Voltage impulsion testing with a rising time of 1us and 1/2/4/6kV of voltage rating

• Electrical Field tests at 50Hz and 1/3.6/6/10/15 kV voltage rating

• Magnetic field tests

Current Rating	Frequency	Position	Duration	Results
4,5A (180A/m)	50Hz	Vertical	30s	OK
7,4A (280 A/m)	16,7Hz	Vertical	30s	OK
1,6A (64 A/m)	150Hz	Vertical	30s	OK
1,2A (48 A/m)	200Hz	Vertical	30s	OK
0,8A (32 A/m)	300Hz	Vertical	30s	OK
0,7A (28 A/m)	350Hz	Vertical	30s	OK
0,4A (16 A/m)	600Hz	Vertical	30s	OK
12,5 (500A/m)	uninterrupted	Vertical	1mn	OK

Caption 12: Electrical field testing

Caption 13: Magnetic field testing