Recommended Upstream Protection and Cable Sizes – IEC

DANGER
hazard of electric shock, explosion, or arc flash An easily accessible breaker is required for upstream protection. Maximum fault current disconnection time: 46 seconds at 200% input. Failure to follow these instructions will result in death or serious injury.

NOTE: Overcurrent protection is to be provided by others.

Cable sizes in this manual are based on table B.52.12 and B.52.13 of IEC 60364-5-52 with the following assertions:

90 °C conductors
An ambient temperature of 30 °C
Use of copper or aluminum conductors
Installation method F4 for DC cables and installation method F5 for AC cables, corrected for single layer in perforated cable tray.

PE cables are sized in accordance with IEC 60364-5-54 table 54.2 Minimum cross-sectional area of protective conductors.

NOTE: Always consider the PE size according to the complete electrical installation. Minimum size of the PE conductor must comply with local safety regulations for high PE conductor current equipment.

If the ambient temperature is greater than 30 °C, larger conductors are to be selected in accordance with the correction factors of the IEC.

NOTE: The use of aluminum conductors can limit the number of parallel Lithium-ion battery cabinets. Contact Schneider Electric for more information.

NOTICE
Risk of equipment damage To ensure correct load sharing in bypass operation in a parallel system, the following recommendations apply: The bypass cables must be of the same length for all UPSs. The output cables must be of the same length for all UPSs. The input cables must be of the same length for all UPSs in a single mains system. Cable formation recommendations must be followed. The reactance of busbar layout in the bypass/input and output switchgear must be the same for all UPSs. If the above recommendations are not followed the result can be uneven load sharing in bypass and overload of individual UPSs. Failure to follow these instructions can result in equipment damage.

NOTICE

Risk of equipment damage

To ensure correct load sharing in bypass operation in a parallel system, the following recommendations apply:

The bypass cables must be of the same length for all UPSs.
The output cables must be of the same length for all UPSs.
The input cables must be of the same length for all UPSs in a single mains system.
Cable formation recommendations must be followed.
The reactance of busbar layout in the bypass/input and output switchgear must be the same for all UPSs.

If the above recommendations are not followed the result can be uneven load sharing in bypass and overload of individual UPSs.

Failure to follow these instructions can result in equipment damage.

NOTICE
Risk of unintentional device operation If a residual current-operated protective device (RCD-B) is used upstream as ground fault protection, then the RCD-B shall be sized to not trip on the leakage current of this product, which can be up to 200 mA. Failure to follow these instructions can result in equipment damage.

Upstream Protection for IEC and Minimum Prospective Phase-To-Earth Short Circuit at the UPS Input/Bypass Terminals

DANGER
Hazard of electric shock, explosion, or arc flash The upstream overcurrent protective device (and its settings) must be sized to ensure a disconnecting time within 0.2 seconds for a minimum prospective phase-to-earth short circuit current calculated or measured at the input/bypass terminals of the UPS. Failure to follow these instructions will result in death or serious injury.

If the upstream overcurrent protective device is a breaker with adjustable short time protection, then it is possible to adjust the short time protection current and short time delay (if present) to meet the requirement of 0.2 seconds for a calculated or measured phase-to-earth prospective short circuit current at the input/bypass terminals of the UPS.

Recommended Upstream Protection and Cable Sizes for 1250 kW UPS

NOTE: For a 1250 I/O cabinet, it is preferred to use flexible copper power cables with as small a diameter as possible. The number of power cables needed for this kW rating will make large and inflexible power cables more difficult to install.

	Maximum OCPD (A)				Cable size per phase (mm²) Copper / Aluminum				PE cable size (mm²) Copper / Aluminum
Voltage (V)	380	400	415	440	380	400	415	440	380	400	415	440
Input	2500 I_r=0.9	2500 I_r=0.9	2500 I_r=0.9	2500 I_r=0.9	5x240/ 6x300	5x240/ 6x300	5x240/ 6x300	5x240/ 6x300	3x240/ 3x300	3x240/ 3x300	3x240/ 3x300	3x240/ 3x300
Bypass	2000 I_r=0.98	2000 I_r=0.95	2000 I_r=0.9	2000 I_r=0.9	4x300/ 5x300	4x300/ 5x300	4x240/ 5x300	4x240/ 5x300	2x300/ 3x300	2x300/ 3x300	2x240/ 3x300	2x240/ 3x300
Output	2000 I_r=0.98	2000 I_r=0.95	2000 I_r=0.9	2000 I_r=0.9	4x300/ 5x300	4x300/ 5x300	4x240/ 5x300	4x240/ 5x300	2x300/ 3x300	2x300/ 3x300	2x240/ 3x300	2x240/ 3x300
Battery	4000	4000	4000	4000	6x300/ 7x300	6x300/ 7x300	6x300/ 7x300	6x300/ 7x300	3x300/ 4x300	3x300/ 4x300	3x300/ 4x300	3x300/ 4x300

Recommended Upstream Protection and Cable Sizes for 1500 kW UPS

	Maximum OCPD (A)				Cable size per phase (mm²) Copper / Aluminum				PE cable size (mm²) Copper / Aluminum
Voltage (V)	380	400	415	440	380	400	415	440	380	400	415	440
Input	3200Long-time setting (I_r) = 0.9.*	3200Long-time setting (I_r) = 0.9.*	3200Long-time setting (I_r) = 0.9.*	2500Long-time setting (I_r) = 1.0.*	7x240/ 9x240	7x240/ 9x240	7x240/ 9x240	6x240/ 8x240	4x240/ 5x240	4x240/ 5x240	4x240/ 5x240	3x240/ 4x240
Bypass	2500Long-time setting (I_r) = 0.95.*	2500Long-time setting (I_r) = 0.9.*	2500Long-time setting (I_r) = 0.9.*	2000Long-time setting (I_r) = 1.0.*	6x240/ 7x240	5x240/ 7x240	5x240/ 7x240	5x240/ 6x240	3x240/ 4x240	3x240/ 4x240	3x240/ 4x240	3x240/ 3x240
Output	2500Long-time setting (I_r) = 0.95.*	2500Long-time setting (I_r) = 0.9.*	2500Long-time setting (I_r) = 0.9.*	2000Long-time setting (I_r) = 1.0.*	6x240/ 7x240	5x240/ 7x240	5x240/ 7x240	5x240/ 6x240	3x240/ 4x240	3x240/ 4x240	3x240/ 4x240	3x240/ 3x240
Battery	4000	4000	4000	4000	8x240/ 10x240	8x240/ 10x240	8x240/ 10x240	8x240/ 10x240	4x240/ 5x240	4x240/ 5x240	4x240/ 5x240	4x240/ 5x240

Recommended Bolt and Lug Sizes for IEC

Cable size mm²	Bolt size	Cable lug type
16	M10 x 40 mm	TLK 16-10
25	M10 x 40 mm	TLK 25-10
35	M10 x 40 mm	TLK 35-10
50	M10 x 40 mm	TLK 50-10
70	M10 x 40 mm	TLK 70-10
95	M10 x 40 mm	TLK 95-10
120	M10 x 40 mm	TLK 120-10
150	M10 x 40 mm	TLK 150-10
185	M10 x 40 mm	TLK 185-10
240	M10 x 40 mm	TLK 240-10