Why Choose the ABB OVR T2 40-440s P QS Surge Protection Device?
The ABB OVR T2 40-440s P QS, order code 2CTB815704R4100, is a pluggable Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against transient overvoltages caused by indirect lightning and switching events. Part of the ABB OVR QuickSafe range, this single-pole SPD uses varistor technology and ABB's Safety Reserve concept for dependable protection and straightforward maintenance.
The OVR T2 40-440s P QS provides a 20 kA nominal discharge current (In) and a 40 kA maximum discharge current (Imax) with an 8/20 µs waveform. ABB specifies a 400 V AC nominal voltage, 440 V AC maximum continuous operating voltage (Uc) and a 2 kV voltage protection level (Up), making the device suitable for compatible TT, TN-C, TN-S and IT low-voltage networks.
The “s” Safety Reserve design incorporates an additional varistor stage so that basic surge protection can remain available after the primary protection stage reaches the end of its service life. QuickSafe technology, visual status indication and pluggable construction support safe, efficient servicing, while the replaceable cartridge design avoids the need to replace the complete SPD assembly during routine maintenance.
Key Advantages
- Type 2 surge protection for low-voltage power distribution installations.
- 40 kA maximum discharge current (Imax) with an 8/20 µs waveform.
- 20 kA nominal discharge current (In) with an 8/20 µs waveform.
- 2 kV voltage protection level (Up) helps limit transient voltage reaching downstream equipment.
- 440 V AC maximum continuous operating voltage (Uc).
- Safety Reserve technology maintains basic surge protection through an additional varistor stage at the end of the primary protection stage's service life.
- QuickSafe technology provides enhanced SPD disconnection safety.
- Compatible with TT, TN-C, TN-S and IT networks in the configurations specified by ABB.
- Pluggable construction enables straightforward replacement of the protection cartridge.
Key Features
- ABB OVR QuickSafe surge protection range.
- Type 2 / Class II surge protection device.
- Single-pole protection.
- 400 V AC nominal voltage.
- 440 V AC maximum continuous operating voltage.
- 20 kA nominal discharge current (8/20 µs).
- 40 kA maximum discharge current (8/20 µs).
- 2 kA impulse current (10/350 µs).
- 2 kV voltage protection level.
- Safety Reserve / reserve-varistor technology.
- Varistor protection technology.
- Integrated visual status indication.
- Pluggable protection cartridge.
- 100 kA rated service short-circuit breaking capacity.
- 35 mm DIN rail mounting.
- Designed and tested to IEC 61643-11 / EN 61643-11.
Type 2 Surge Protection with Safety Reserve Technology
Type 2 surge protection devices are designed to discharge transient currents associated with indirect lightning strikes and electrical switching events that produce induced or conducted overvoltages on low-voltage distribution networks. They are commonly installed in main distribution switchboards and subdistribution boards, with additional coordinated surge protection potentially required where sensitive equipment is remote from the primary SPD.
The ABB OVR T2 40-440s P QS combines a 40 kA maximum 8/20 µs discharge current with ABB's Safety Reserve technology. Instead of completely disconnecting surge protection when the primary varistor reaches the end of its service life, the reserve-varistor design maintains a basic level of protection until replacement can be carried out, while the pluggable OVR T2 40-440s C QS cartridge enables efficient servicing of the installed SPD.
Typical Applications
- 400 V AC low-voltage electrical installations.
- Compatible TT electrical distribution systems.
- Compatible TN-C electrical distribution systems.
- Compatible TN-S electrical distribution systems.
- Compatible IT electrical distribution systems.
- Main electrical distribution switchboards.
- Subdistribution boards.
- Commercial building electrical systems.
- Industrial low-voltage distribution installations.
- Protection against indirect lightning and switching-induced transient overvoltages.
