Surge Protection Devices and Insulation Monitoring Devices
HAKEL is since its establishment in 1994 a major producer of Surge Protection Devices and Insulation Monitoring Devices (IMD) in Europe. Hakel’s Insulation Monitoring Devices for traction vehicles / rolling stock AC and DC IT system comply with EN 50155, EN 61373, EN 45545-2, EN 50121-3-2 and EN 61557-8 railway standards.
Insulation Monitoring Devices for Traction Vehicles / Rolling Stock AC IT System
IMD types HIG93T, HIG93T/N, HIG93T/L HIG93T/24 and HIG93T/24L are designed for monitoring the insulation resistance of single-phase and 3-phase ungrounded AC IT systems for traction systems and vehicles.
HIG93T: Monitors AC IT systems
- measures insulation resistance from 5 kΩ to 900 kΩ
- powered by independent power source 230 V AC
HIG93T/N: Monitors AC IT systems
- measures insulation resistance from 5 kΩ to 900 kΩ
- powered by independent power source 24 V DC
HIG93T/L: Monitors AC IT systems
- measures insulation resistance from 0,1 kΩ to 90 kΩ
- powered by independent power source 230 V AC
HIG93T/24: Monitors AC IT systems
- measures insulation resistance from 5 kΩ to 900 kΩ
- powered by independent power source 24 V DC
- higher temperature range
HIG93T/24L: Monitors AC IT systems
- measures insulation resistance from 0,1 kΩ to 90 kΩ
- powered by independent power source 24 V DC
- higher temperature range
TL*T inductors serve for the adaption of IMD circuits to 3-phase ungrounded IT power supply system 3×400 V AC or 3×500 V AC. Devices are designed for use in rail vehicles.
TL400T: Inductor for traction systems and vehicles, 3×400 V AC
TL500T: Inductor for traction systems and vehicles, 3×500 V AC
Insulation Monitoring Devices for Traction Vehicles / Rolling Stock DC IT System
IMD types HIG24VDC/T, HIG48VDC/T and HIG110VDC/T are designed for monitoring the insulation resistance of DC IT systems for traction systems and vehicles.
HIG24VDC/T: Monitors DC IT systems with nominal voltage 24 V DC
- measures insulation resistance 5 kΩ to 990 kΩ
- powered from monitored system
HIG48VDC/T: Monitors DC IT systems with nominal voltage 48 V DC
- measures insulation resistance 5 kΩ to 990 kΩ
- powered from monitored system
HIG110VDC/T: Monitors DC IT systems with nominal voltage 110 V DC
- measures insulation resistance 5 kΩ to 990 kΩ
- powered from monitored system
Insulation Monitoring Devices for Traction Vehicles / Rolling Stock AC/DC IT System
HIG99: Monitors AC, DC, AC/DC IT systems
- maximum operating voltage of monitored IT power supply system is 1000 V DC / 710 V AC
- powered from an independent power source 24 V DC
- option to connect communication module HIG99 KM CAN with CAN OPEN protocol
Voltage Limiting Devices for Railways and Urban Public Transportation
VLDs are designed for the protection of non-living parts of metallic structures in both AC and DC rail traction systems. Voltage Limiting Devices for railways and urban public transportation generate a durable conductive path between the overloaded area and the railway’s substation. This results in increased current loads that are sensed at the substation, tripping the safety switch and thus protecting personnel and equipment. It is recommended to install such limiter between the current return path and non-electrified parts of structures laying adjacent to the rails.
HGS100RW: Designed for railway applications – VLD class H according to EN 62561-3
- ignition voltage 250 or 500V DC
- gas-filled gas discharge tube with a high Lightning Impulse Current of up to 100 kA
- response time of up to 100 ns
- overvoltages generated by lightning are effectively limited by HAKEL’s internal construction of HGS100 RW
- stainless steel housing, IP66
- EN50122-1, EN 61643-1/A11 and EN50526-2
HL120: Designed for urban public transportation – VLD class 2.2 according to EN 50526-2
- ignition voltage 120V DC
- parallel combination of high-energy metal oxide varistors (MOV) and high performance thyristors
- short-term withstand current 4,7 kA / 0,025 s (repeatable), 20 kA / 0,1 s (unrepeatable)
- lightning impulse current 40 kA
- reversible current 105 A / 60 minutes
- metal housing, IP67
- EN50526-2
Surge Protection Devices and Monitoring for Railways
With a gradual introduction of electronic protection systems sensitive to the overvoltage into the railway traffic, it is necessary to address also their protection, especially against dangerous effects of lightning strokes that may cause extensive damages to this equipment.
A railway electronic signalling system is a complex system that must be highly reliable and responsive in accordance with the needs of safe railway traffic. Individual functional units are located both inside and outside buildings, at the railway stations and on the lines, i.e. in the open environment where the induction from the lightning (impulse) currents has a great effect, both from the short and long-distance discharges. HAKEL’s range of Surge Protection Devices and Monitoring for Railways includes:
HT-D 4 is designed to protect the transmission of information signals with a maximum data rate of 1 Mbit/s. The connection is done by eight-pole screw terminal socket to which a connected conductor with a cross-section of 0,25 to 1,5 mm2 can be connected. HT-D 4 is produced for 6, 12, 24 and 48 V with up to 4 protected pairs.
HT-NET 5Ecat/RJ is designed to protect the transmission of information signals with a maximum data rate of 170 Mbit/s. The connection is done by RJ connector (structured cabling). HT-NET 5Ecat/RJ is produced for 48 V with up to 4 protected pairs.
PIIIM-275/3+1 is a surge arrester Type 2+3 to be placed into subsidiary switchboards, control boxes or charging stations of electrical vehicles. They can also be used in installations for the protection of automatic railway crossings, traction traffic lights and information panels.
PIVM12,5-275/3+1 is a lightning and surge arrester Type 1+2 to be placed into office buildings, residential buildings, family houses and objects as close as possible to the cable entry – main switchboards. They can also be used in charging stations of electrical vehicles or installations for the protection of automatic railway crossings, traction traffic lights and information panels.
HIG 93+TL400 are designed for monitoring the insulation status of single-phase and 3-phase ungrounded IT power supply systems . If monitoring the insulation status of a single-phase or 3-phase ungrounded IT power supply system with higher operating voltage is required, it is necessary to create an artificial centre using TL400.
Inductor TL400 TL serves for the adaption of IMD circuits to 3-phase ungrounded IT power supply system 3 x 400 V AC
