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2CTB803873R1200 ABB OVR T2-T3 N3 20-275 P QS Surge Protective Device

2CTB803873R1200 ABB OVR T2-T3 N3 20-275 P QS Surge Protective Device

ABB 2CTB803873R1200 OVR T2-T3 N3 20-275 P QS is a 3P+N pluggable QuickSafe Type 2 and Type 3 surge protective device for 230/400 V AC TT and TN-S networks with 20 kA maximum discharge current and replaceable protection cartridges.

SKU: 2CTB803873R1200MPN: 2CTB803873R1200
Price
List Price £294.37 ex VAT
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£294.37
Manufacturer Lead Time Estimated Delivery 10 weeks
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Why Choose the ABB OVR T2-T3 N3 20-275 P QS Surge Protective Device?

The ABB OVR T2-T3 N3 20-275 P QS 2CTB803873R1200 is a combined Type 2 and Type 3 surge protective device (SPD) designed for three-phase low-voltage electrical installations. Part of ABB's OVR QuickSafe range, its 3P+N configuration provides coordinated surge protection for TT and TN-S networks, helping protect distribution systems and sensitive downstream equipment against transient overvoltages.

Designed for 230/400 V AC systems, the OVR T2-T3 N3 20-275 P QS has a maximum continuous operating voltage Uc of 275 V AC. It provides a maximum discharge current Imax of 20 kA and a nominal discharge current In of 5 kA using an 8/20 µs waveform, together with a combination-wave open-circuit voltage Uoc of 6 kV.

ABB's QuickSafe (QS) technology combines pluggable construction with replaceable phase and neutral cartridges for straightforward servicing. The device provides an L-N voltage protection level Up of 0.9 kV and an N-PE protection level of 1.4 kV, while mechanical status indication allows the condition of each protection element to be checked locally.

Key Advantages

  • Combined Type 2 + Type 3 protection for distribution systems and sensitive downstream equipment.
  • 3P+N configuration designed for three-phase TT and TN-S electrical networks.
  • 20 kA maximum discharge current (Imax) for transient surge-current handling.
  • 0.9 kV L-N voltage protection level helps limit transient voltage reaching connected equipment.
  • QuickSafe pluggable construction enables individual protection cartridges to be replaced.
  • Mechanical status indicators provide straightforward local inspection of SPD condition.

Key Features

  • ABB OVR T2-T3 QuickSafe surge protection range.
  • Combined Type 2 + Type 3 / Class II + III SPD.
  • Four protected poles (3P+N).
  • 230/400 V AC nominal system voltage.
  • 275 V AC maximum continuous operating voltage Uc.
  • 20 kA maximum discharge current Imax.
  • 5 kA nominal discharge current In.
  • 6 kV combination-wave open-circuit voltage Uoc.
  • QuickSafe (QS) pluggable technology with replaceable phase and neutral cartridges.
  • Suitable for TT and TN-S low-voltage distribution systems.

Combined Type 2 and Type 3 Protection for Three-Phase Networks

Combined Type 2 and Type 3 SPDs provide distribution-level surge-current handling together with enhanced voltage limitation for sensitive downstream equipment. In three-phase TT and TN-S installations, the 3P+N configuration provides coordinated protection between the phase conductors, neutral and protective earth, helping reduce potentially damaging transient voltages throughout the installation.

The ABB OVR T2-T3 N3 20-275 P QS combines 20 kA Imax, 5 kA In and a 0.9 kV L-N Up with ABB QuickSafe technology. Replaceable phase and neutral cartridges, mechanical status indication and a compact DIN-rail format support efficient inspection and maintenance throughout the SPD's service life.

Typical Applications

  • 230/400 V AC three-phase TT electrical systems.
  • 230/400 V AC three-phase TN-S electrical systems.
  • Main and sub-distribution switchboards.
  • Commercial building electrical installations.
  • Industrial control and distribution panels.
  • Protection of automation and sensitive electronic equipment.
  • Installations requiring combined Type 2 and Type 3 surge protection.

Technical Specifications

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Impulse Current Iimp (kA) 2 kA
Series OVR T2-T3 QuickSafe
Order code 2CTB803873R1200
EAN 3660308520012
Product group Surge Protection Devices
Product type Combined Type 2 + Type 3 surge protective device
Arrester class II + III
Number of protected poles 4 (3P+N)
Compatible distribution systems TT / TN-S
Nominal AC system voltage 230/400 V AC
Rated voltage 400 V AC
Maximum continuous operating voltage Uc 275 V AC
DC voltage rating 350 V DC
Frequency 47–63 Hz
Maximum discharge current Imax (8/20 µs) 20 kA
Nominal discharge current In (8/20 µs) 5 kA
Impulse current Iimp (10/350 µs) 2 kA
Combination-wave open-circuit voltage Uoc 6 kV
Voltage protection level Up (L-N) 0.9 kV
Voltage protection level Up (N-PE) 1.4 kV
Overall voltage protection level 1.4 kV
Short-circuit withstand rating 100 kA
Total discharge current 80 kA
Ground residual current <10 µA
Response time <25 ns
Construction Pluggable
Technology QuickSafe (QS)
Status indication Mechanical indicator for each arrester
Phase replacement cartridge OVR T2-T3 20-275 C QS, 2CTB803876R1200
Neutral replacement cartridge OVR T2 N 80-275 C QS, 2CTB803876R0000
Maximum backup protection 125 A circuit breaker or gG/gL fuse
Solid conductor range 2.5–25 mm²
Stranded conductor range 2.5–16 mm²
Degree of protection IP20
Operating temperature −40 to +80 °C
Maximum altitude 2000 m
Fire resistance UL 94 V-0
Dimensions (H × W × D) 88 × 71.2 × 58 mm
Weight 480 g
Standards IEC 61643-11 / EN 61643-11

Frequently Asked Questions

What is the ABB OVR T2-T3 N3 20-275 P QS?

The ABB 2CTB803873R1200 is a 3P+N combined Type 2 and Type 3 surge protective device with QuickSafe pluggable construction, designed for 230/400 V AC TT and TN-S three-phase networks.

What are the discharge current ratings of the OVR T2-T3 N3 20-275 P QS?

The device has a maximum discharge current Imax of 20 kA and a nominal discharge current In of 5 kA, based on an 8/20 µs waveform.

What is the voltage protection level of 2CTB803873R1200?

The ABB 2CTB803873R1200 provides a voltage protection level Up of 0.9 kV between line and neutral and 1.4 kV between neutral and protective earth.

Can the cartridges in the ABB OVR T2-T3 N3 20-275 P QS be replaced?

Yes. The QuickSafe design is pluggable. The phase positions use the OVR T2-T3 20-275 C QS cartridge, order code 2CTB803876R1200, while the neutral position uses the OVR T2 N 80-275 C QS, order code 2CTB803876R0000.

Which electrical networks are suitable for the OVR T2-T3 N3 20-275 P QS?

The device is designed for compatible 230/400 V AC TT and TN-S three-phase systems and provides four-pole 3P+N surge protection.

Trusted QuickSafe Surge Protection from ABB

ABB OVR QuickSafe surge protective devices provide electrical designers, installers and maintenance professionals with coordinated protection against transient overvoltages, combining replaceable pluggable cartridges, clear status indication and robust surge-current performance for three-phase distribution systems.

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