Kaukora FIL-SPL, User Manual

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Menu 2.2.1 Max
Maximum current limit related to 0 - 5 A current transformers. Settable value:

Setting range 1.0 - 5.0 A

Default value 5.0 A
Note! The primary side current transformers must be installed near main switch or main fuses of the
property because total power consumption of the whole property is to be monitored.
The value to be used is dependent on conversion ratio of primary side current transformer and main fuses
of the property. Calculation:
𝑆𝑖𝑧𝑒 𝑜𝑓 𝑚𝑎𝑖𝑛 𝑓𝑢𝑠𝑒
𝐶𝑜𝑛𝑣𝑒𝑟𝑠𝑖𝑜𝑛 𝑟𝑎𝑡𝑖𝑜 𝑜𝑓 𝑝𝑟𝑖𝑚𝑎𝑟𝑦 𝑠𝑖𝑑𝑒 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 𝑡𝑟𝑎𝑛𝑠𝑓𝑜𝑟𝑚𝑒𝑟𝑠
= 𝑉𝑎𝑙𝑢𝑒 𝑡𝑜 𝑏𝑒 𝑢𝑠𝑒𝑑
Calculation example: Main fuses of the property 3 x 400 A, used primary side current transformers 500/5.
400
(
500
5 )
=
400
100
= 4
With this example, the value 4.0 should be set as maximum current limit.
Menu 2.2.2 Marginal
The current marginal determines how much below current limit the measured current must be for enabling
next power step. Setting correct value eliminates unnecessary enable/disable of power steps for achieving
longer lifetime of components. Settable value:

Setting range 0.1 - 1.0 A

Default 1.0 A
Note! The setting values are indicative as many issues affects to the accuracy, such as accuracy of used
current transformers.
The value to be used is dependent on lowest power step of used FIL-SPL, phase-to-neutral voltage and
conversion ratio of primary side current transformers. Calculation:
𝐿𝑜𝑤𝑒𝑠𝑡 𝑝𝑜𝑤𝑒𝑟 𝑠𝑡𝑒𝑝 [𝑊]
3 × 𝑃ℎ𝑎𝑠𝑒 𝑉𝑜𝑙𝑡𝑎𝑔𝑒 × 𝐶𝑜𝑛𝑣𝑒𝑟𝑠𝑖𝑜𝑛 𝑟𝑎𝑡𝑖𝑜 𝑜𝑓 𝑝𝑟𝑖𝑚𝑎𝑟𝑦 𝑠𝑖𝑑𝑒 𝑐𝑢𝑟𝑟𝑒𝑛𝑡 𝑡𝑟𝑎𝑛𝑠𝑓𝑜𝑟𝑚𝑒𝑟𝑠
= 𝑉𝑎𝑙𝑢𝑒 𝑡𝑜 𝑏𝑒 𝑢𝑠𝑒𝑑
Calculation example: Lowest power step 10 kW, phase-to-neutral voltage 230 V, used primary side current
transformers 500/5.
10000
3 × 230 × (
500
5 )
=
10000
3 × 230 × 100
=
10000
69000
= 0.145
With this example the value 0.2 should be set as a current marginal.