Overvoltage protection in railway networks

							R VL                              Overvoltage protection in railway networks


RVL is designed for overvoltage protection of
personnel and equipment in D.C. rail traction
systems.

The voltage limiter is installed between the
current return path and structures laying
adjacent to the rails (signalling, telecommu-
nication and electrical equipment, catenary
poles, etc.)

In case of overvoltages, RVL generates a
durable conductive path between the
overloaded area and the substation. This
results to increased current loads that are
sensed at the substation, tripping the safety
switch and thus protecting personnel and
equipment.

Overvoltages generated by lightning, with time
duration less than 3 ms, are limited effectively
by Raycap’s patented surge suppression
module (Strikesorb®). Over-voltages with time
duration more than 3 ms are limited by a
thyristor that has a high-energy capability.
                                                               RVL
All requirements imposed by EN 50122-1:                   Voltage Limiter
1999: Railway applications–Part 1: Protective
provisions relating to electrical safety and
                                                     Advantages
earthing, and EN 50123-5:2003: Railway
applications–Part 5: Surge arresters and low
                                                     - Potential difference is limited to a safe very low
voltage limiters for specific use in d.c. systems,
                                                       voltage level.
are fulfilled by RVL.
                                                     - Very low residual voltage of the surge
                                                       protection module, less than 750 V.
                                                     - Intelligent device triggering with very high
                                                       precision, less than 0.1 V.
                                                     - Temperature independent device triggering
                                                       voltage, in the range of –40 ° C to +85 °C.
                                                     - Guaranteed reversibility for 96 s and currents
                                                       up to 1000 A, for protection against the danger
                                                       of rail potential difference.
                                                     - Combined protection to personnel and equip-
                                                       ment with high-energy absorption capability.
                                                     - Capable to withstand high short circuit currents
                                                     - Five year warranty


              RVL is powered by Strikesorb®
 Raycap’s superior surge suppression module
Technical specifications

RVL electrical characteristics                        Strikesorb® electrical characteristics
(EN 50123-5: 2003)                                    (IEC 60099-4: 1998)

                                                      - Maximum discharge current
- Rated voltage (Ur):                 100 V
                                                        Imax:                               200 kA (8/20 μs)
- Maximum withstand
                                                      - Nominal discharge current In:       10 kA (8/20 μs)
  voltage (Uw):                       115 V
                                                      - Maximum continuous operating
- Maximum sparkover voltage (Us):     125 V
                                                        voltage Uc:                         280 V
- Long term withstand current
                                                      - Residual voltage Up at nominal
   Iw-tp:                             1000 A / 96 s
                                                       discharge current In (peak value):   < 750 V
- Rated withstand peak current
                                                      - Lightning current impulse
  (half-sine wave), non repetitive:   26 kA / 10 ms
                                                       (10/350 μs) withstand,
- Rated withstand peak current
                                                        according to IEC 61643-1:           25 kA
  (half-sine wave), (10x3 pulses):    10 kA / 50 ms




Operating conditions:

- Temperature range: -40 °C to +85 °C
- Weight without accessories: 11,5 kg
- For indoor and outdoor use (IP 67, UV resistant)




                                            Telou and Petroutsou 14, 15124 Maroussi Athens, Greece
                     Tel.: +30 210 6152000, Fax: +30 210 6196002, info@raycap.gr - www.raycap.com