Surge protectors

Why install them?

Lightning can fundamentally affect us in two ways, either by direct impact or through an overvoltage, so a complete lightning protection system is made up of two systems; an external system against direct impacts and another internal to counteract the effects produced by overvoltages.

We have standardized protectors to protect any installation and/or equipment, we even manufacture protectors tailored to the client and the systems that need to be protected.

Contact us and our technical department will advise you on the most appropriate choice.

SPD · Modular protection systems

Type 1 surge protection devices are recommended in installations where there is a high probability of atmospheric discharges.

COMPACT PROTECTION DEVICES
Reference Description Uc. Máx Iimp  Up
AD4-400/240 Four-polar 255 V 100 kA 1,5 kV
AD2-400/240 Bipolar 255 V 100 kA 1,5 kV
AD1-200/240 Unipolar F-N 255 V 50 kA 1,5 kV
AD1-400/240 Unipolar N-T 255 V 100 kA 1,5 kV
Available for all types of land. TT, IT, TN-S and TN-C
Standards: IEC 61643-1, EN 61643-11 and UL 1449
Protector Tipo 1+2

Type 1 + 2 surge protection devices are installed at the head of the facilities to be protected and combine the characteristics of Type 1 and Type 2.

COMPACT PROTECTION DEVICES
Reference Description Uc. Máx (F-N/N-T) Iimp (L-N) (F-N/N-T) In  Up
BD4-100/240 Four-pole 275 V / 255 V 12,5 / 25 kA 50 kA 1,5 / 1,8 kV
BD4-100/240 S Four-pole 275 V / 255 V 12,5 / 25 kA 50 kA 1,5 / 1,8 kV
BD2-100/240 Bipolar 275 V / 255 V 12,5 / 25 kA 50 kA 1,5 / 1,8 kV
BD2-100/240 S Bipolar 275 V / 255 V 12,5 / 25 kA 50 kA 1,5 / 1,8 kV
BD1-100/240 Unipolar 255 V 25 kA 50 kA 1,8 kV
BD4M-50/240 Four-polar 275 V / 255 V 12,5 / 50 kA 20 kA 1,5 kV
BD2M-50/240 Bipolar 275 V / 255 V 12,5 / 50 kA 20 kA 1,5 kV
For remote signaling consult reference.
Available for all types of land. TT, IT, TN-S and TN-C
Standards: IEC 61643-1, EN 61643-11 and UL 1449
Protector Tipo 1+2
PLUG-IN PROTECTION DEVICES
Reference Description Uc. Máx (F-N/N-T) Iimp (L-N) (F-N/N-T) In  Up
BD4-60/240 Four-pole 275 V / 255 V 7 / 15 kA 30 kA 1,5 / 1,8 kV
BD2-60/240 Bipolar 275 V / 255 V 7 / 15 kA 30 kA 1,5 / 1,8 kV
BV1-60/240 Unipolar 275 V 7 kA 30 kA 1,5 kV
For remote signaling consult reference.
Avaliable for all types of land. TT, IT, TN-S and TN-C
Standards: IEC 61643-1, EN 61643-11 and UL 1449
CARTRIDGE FOR PLUG-IN PROTECTION DEVICES
Reference Description Uc. Máx (F-N/N-T) Iimp (L-N) (F-N/N-T) In  Up
BD2-60/240 V Cartridge F-N 275 V 7 kA 30 kA 1,5 kV
BD2-60/240 D Cartridge N-T 275 V 15 kA 30 kA 1,8 kV
BD4-60/240 V Cartridge F-N 275 V 7 kA 30 kA 1,5 kV
BD4-60/240 D Cartridge N-T 255 V 15 kA 30 kA 1,8 kV

Type 2 surge protection devices are installed at the head of electrical installations and at secondary power panels. They protect electronic and electrical equipment against transient overvoltages of industrial, atmospheric, and maneuver origin.

PLUG-IN PROTECTION DEVICES
Reference Description Uc. Máx In I Máx   Up
BV1-40/240 Unipolar 275 V 20 kA 40 kA 1,2 kV
BD2-40/240 Bipolar 275 V / 255 V 20 kA 40 kA 1,2 / 1,5 kV
BD4-40/240 Four-pole 275 V / 255 V 20 kA 40 kA 1,2 / 1,5 kV
BV4M-40/240 Four-pole 275 V 20 kA 40 kA 1,2 kV
BV2M-40/240 Bipolar 255 V 20 kA 40 kA 1,2 kV
For remote signaling consult reference.
Available for all types of land. TT, IT, TN-S and TN-C
Standards: IEC 61643-1, EN 61643-11 and UL 1449
PLUG-ON PROTECTION DEVICES
Reference Description Uc. Máx In I Máx   Up
BV2-40/240 V Cartridge F-N 275 V 20 kA 40 kA 1,2 kV
BD2-40/240 D Cartridge N-T 275 V 20 kA 40 kA 1,2 kV
BV4M-40/240 Cartridge F-N / N-T 275 V 20 kA 40 kA 1,2 kV
BV2M-40/240 Cartridge F-N / N-T 275 V 20 kA 40 kA 1,2 kV

Type 2+3 surge protection devices are installed at the power supply of the final receivers and combine the characteristics of Type 2 and Type 3.

PLUG-IN PROTECTION DEVICES  
Reference Description Uc. Máx In I Máx   Up Uoc
BV1-20/240 Unipolar 275 V 10 kA 20 kA 1,1 kV 20 kV
BD2-20/240 Bipolar 275 V / 255 V 10 kA 20 kA 1,1 / 1,3 kV 20 kV
BD4-20/240 Four-pole 275 V / 255 V 10 kA 20 kA 1,1 / 1,3 kV 20 kV
BV2M-20/240 Bipolar 275 V 10 kA 20 kA 1,1 kV 20 kV
BV4M-20/240 Four-pole 255 V 10 kA 20 kA 1,1 kV 20 kV
For remote signaling consult reference.
Available for all types of land. TT, IT, TN-S and TN-C
Standards: IEC 61643-1, EN 61643-11 and UL 1449
CARTRIDGES FOR PLUG-IN PROTECTION DEVICES  
Reference Description Uc. Máx In I Máx   Up Uoc
BD2-20/240 V Cartridge F-N 275 V 10 kA 20 kA 1,1 kV 20 kV
BD4-20/240 V Cartridge F-N 275 V 10 kA 20 kA 1,1 kV 20 kV
BD2M-20/240 V Cartridge F-N / N-T 275 V 10 kA 20 kA 1,1 kV 20 kV
BV4M-20/240 V Cartridge F-N / N-T 275 V 10 kA 20 kA 1,1 kV 20 kV
BD2-20/240 D Cartridge N-T 255 V 10 kA 20 kA 1,3 kV 20 kV
BD4-20/240 D Cartridge N-T 255 V 10 kA 20 kV 1,3 kV 20 kV

Overvoltage protection devices for protection equipment that work in direct current. They protect photovoltaic equipment against transient overvoltages of atmospheric origin and maneuver.

PLUG-IN PROTECTION DEVICES
Reference Description Ucpv PV In I Máx   Up
BF3-40/600 Tripolar 620 Vcc 20 kA 40 kA 2,0 kV
BF3-40/1000 Tripolar 1060 Vcc 20 kA 40 kA 3,6 kV
BF3-40/1500 Tripolar 1520 Vcc 20 kA 40 kA 4,0 kV
For remote signaling consult reference.
Standards: IEC 61643-1, EN 61643-11 and UL 1449
CARTRIDGES FOR PLUG-IN PROTECTION DEVICES
Reference Description Ucpv PV In I Máx   Up
BF3-40/600 V Cartridge 620 Vcc 20 kA 40 kA 2,0 kV
BF3-40/1000 V Cartridge 1060 Vcc 20 kA 40 kA 3,6 kV
BF3-40/1500 V Cartridge 1520 Vcc 20 kA 40 kA 4,0 kV

Surge protection devices for data lines protect the electronic equipment of the communication network against any transient overvoltage induced on the data lines. These protectors must be installed as close as possible to the equipment to be protected.

PROTECTION DEVICES FOR DATA LINES  
Reference Descriptions Uc. Máx In I Máx   Up (L-L / L-T) IL
TD/5-B0 1 pair 6 Vcc 5 kA 10 kA 80/350 V 500 mA
TD/12-B0 1 pair 15 Vcc 5 kA 10 kA 150/350 V 500 mA
TD/24-B0 1 pair 28 Vcc 5 kA 10 kA 200/500 V 500 mA
TD/48-B0 1 pair 60 Vcc 5 kA 10 kA 250/500 V 500 mA
TD/110-A0 1 pair 180 Vcc 5 kA 10 kA 0,5 kV 500 mA
TD/250-A0 1 pair 275 Vcc 5 kA 10 kA 1/0,75 kV 500 mA
Standards: IEC 61643-1
PROTECTION DEVICES FOR TELEPHONE LINES, ADSL AND ETHERNET  
Reference Description Uc. Máx In

(L-L / L-T)

 I Máx 

(L-L / L-T)

  Up

(L-L / L-T)

 IL
TD/110-RJ11-4 For telephone line via RJ1 connector 180 Vcc 2 kA 5 kA 200/500 V 0,5 A
TD/5-RJ45-8-CAT 6 For Ethernet via RJ45 connector, Cat 6 6 Vcc 2,5 kA 5 kA 15/800 V 0,5 A
TD/5-RJ45-8-CAT 6-POE Ethernet RJ 45, Cat 6

Power Over Ethernet

 6 Vcc

(57 Vcc POE)

 2,5 kA 5 kA 25/600 V 0,5 A
Standards: IEC 61643-1

Surge protection devices for coaxial cables protect the electronic equipment associated with the coaxial installation against any type of transient overvoltage induced on the coaxial cables. These protectors must be installed as close as possible to the equipment to be protected.

PROTECTION DEVICES FOR COAXIAL CABLES
Reference Description Uc. Máx I Máx Impedacia  Up
CD-90-B-HH-75 Type BNC Female – Female 70 Vcc 20 kA 75 Ω 700 V
CD-250-B-HH-75 Type BNC Female – Female 200 Vcc 20 kA 75 Ω 700 V
CD-90-B-MH-75 Type BNC Male – Female 70 Vcc 20 kA 75 Ω 700 V
CD-250-B-MH-75 Type BNC Male – Female 200 Vcc 20 kA 75 Ω 700 V
CD-90-F-HH-75 Type F Female – Female 70 Vcc 20 kA 75 Ω 700 V
CD-250-F-HH-75 Type F Female – Female 200 Vcc 20 kA 75 Ω 700 V
CD-90-F-MH-75 Type F Male – Female 70 Vcc 20 kA 75 Ω 700 V
CD-250-F-MH-75 Type F Male – Female 200 Vcc 20 kA 75 Ω 700 V
Available in other types of connection and impedance.
Standards: IEC 61643-2
SPU · Unified protection systems

Unified protection systems, also known as SPUs, are made up of multiple redundant protection sets coordinated with each other and designed according to the criteria of maximum discharge capacity and minimum residual voltage. Its design allows the implementation of accessory modules, as well as its adaptation to the needs of each installation, giving priority to its safety and proper functioning.

The SPUs have been designed to ensure the protection of installations against overvoltages of atmospheric and industrial origin, MF/AM harmonics, and peaks associated with micro-interruptions. In addition, the electrical installation will be protected against overvoltages, power outages, and phase asymmetry by adding a PTR4 set. This set is programmable in time and voltage.

  • Large discharge capacity for 8/20 µs and 10/350 µs waveforms.
  • Residual values close to the voltage of the protected installation.
  • Frequency filtering.
  • There are 3 or 4 effective and self-coordinated protective sets, each one by itself.
  • Eliminates surges between phases, phase-ground, phase-neutral, and neutral-ground.
  • Response time of 0.025µs.
  • Microinterruptions in the order of milliseconds are eliminated in low power installations.
  • Repairable
MAIN CHARACTERISTICS TO DEFINE THE DIFFERENT RANGES OF SPU SERIES
SERIES 4D SERIES 2D SERIES 4S SERIES 2S SERIES 3F
Installation method Parallel Parallel Series Series Parallel
Rated voltage (V)(1) 230/240 230 230/240 230 400
Protection against industrial transient overvoltages 8/20 µs * * * * *
Protection against transient lightning surges 10/350 µs (2) * * * – –
Protection against permanent overvoltages (3) * * * – –
Undervoltages protection (3) * * * – –
Phase asymmetry protection (3) * * * – –
MF/AF harmonic protection * * * * *
(1) Available in other voltages on request.
(2) According to models.
(3) Requires the addition of the PTR4 kit.

Our protection systems have been designed to protect all types of electrical and electronic installations of any power, especially those that have sensitive electronic devices. With the installation of an SPU, installations are prevented from being affected by: overvoltages, micro-interruptions, harmonics, undervoltages, phase asymmetry, and electromagnetic compatibility.

Given that not all installations are the same, and to protect them effectively, it is necessary to adapt both to their characteristics and to the demands of our client, at MD we offer the possibility of modifying the features of our products. Therefore, any device developed by MD can:

  • Adjust to special supply voltages: 500 V, 690 V, etc.
  • Modify the IP degree in the installations that require it.
  • Increase the energy dissipation capacity in installations subjected to very energetic discharges.
  • Increase the frequency filtering capacity.
  • Adapt to any type of network: two-phase, three-phase are neutral, IT, TT, etc.
  • It incorporates acoustic alarms.
NOTE
If you need any SPD or SPU with different characteristics, contact us and our technical department will advise you on the most appropriate choice.
Railway protection

We are specialists in the design and manufacture of railway protection devices. Our devices are designed under the criteria of maximum reliability and robustness. We collaborate with engineering companies in the search for solutions to specific problems through the development of personalized devices. The most relevant protection devices designed and developed by MD are:

  • Protection of rectifier groups of substations against overvoltages.
  • Protection of electronic devices for auxiliary services against overvoltages and MF/AF harmonics.
  • Protection of interlocked cabinets against overvoltages, MF/AF harmonics, and overcurrents.
  • Protection of signaling circuits against overvoltages.
  • Polarized protection devices (DPPo).
  • interval downloaders.
  • Electrolytic corrosion protection devices.
  • Outdoor auto valves.
  • Internal auto valves with remote signaling

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