Surge Protection Devices - Specification

Surge Protection Devices (SPD):

Tested and comply to standard IEC61643-1: Surge protection of connected 240V/415V (LV) equipment.

Performance parameters tested to:

Maximum Continuous Operating Voltage shall be 280VAC = Uc (Line to Neutral voltage).
Voltage Protection Level (Up) shall not exceed 850V when tested to Class II at 5kA per IEC61643-11
Voltage Protection Level (Up) shall not exceed 800V when tested to Class III at 5kA, During this test the Uoc =10kV.
Uoc=10kV when tested to IEC61643-11
Tested to longwave 10/1000µs at 250A as per IEEE C62.41.2 and C62.45.

Components:

SPDs shall consist only of non degrading Silicon Avalanche Suppressor Diodes. The SPD power suppressors shall be replaceable and upgradeable to a higher rating value, without turning power off, tools or skills. Construction materials to be Listed or Recognised to IEC 61643.

Installation Practices:

For DIN SPD’s a 20A upstream circuit breaker must be installed for protection and isolation of the SPD.
Supply to the SPD may be via a circuit breaker or a fuse isolator combination.
Cabling to the SPD shall have the largest bending radius possible and with the minimum number of bends and shall be at minimum distance possible (< 1m). Cabling to the SPD shall be more than 6mm2 diameter.

Marking:

Should be consistent with IEC 61643-1.

Monitoring of SPD:

First local LED will show power is ON. Second local LED will show operational status. Relay for remote monitoring shall be incorporated. The relay shall be rated to operate to 3A 230VAC.

Standards:

IEC61643-1 (latest edition) Surge Protective Devices Connected To Low-Voltage Power Distribution Systems – Part 11: Performance Requirements And Testing Methods

IEEE C62.41 Recommended practice for surge voltages in LV AC power circuits.

IEEE C62.45 Guide on surge testing for equipment connected to LV AC power circuits.

Lightning protection of buildings and structures: To AS 1768 Lightning protection.

Surge arrestors for insulation protection: To AS 4070 Recommended practices for the protection of LV electrical installations and equipment in MEN systems from transient overvoltages, for the protection of cabling and equipment insulation in MEN installations from transient voltages exceeding 2500V.