APC 9000 Electrical parameters for selecting protective devices, Electrical parameters for Mains

Page 6

Characteristics

1.4 Electrical parameters for selecting protective devices

The parameters given in the table below can be used to determine the required rating of the source side protective circuit breaker on Mains 1 of a single-unit or modular UPS, a frequency converter, or a parallel UPS with SSC.

Important:

It is essential to choose the type of circuit breaker according to its breaking capacity and the prospective short-circuit current at its place of installation.

Note:

For Mains 1 power supply voltages of 380, 400 and 415 V, the Mains 1 current is the same because it is a function of the DC voltage.

Electrical parameters for Mains 1

rated

Mains 1 current

 

 

 

inverter

 

 

 

 

rated current In for unit:

 

for 25 %

for 50 %

output

 

 

 

overload (3)

overload (3)

in kVA

with battery at start

without battery (2)

 

 

 

 

 

 

of charge cycle (1)

 

 

 

 

 

 

 

 

800

1555

1329

1819

2183

 

 

 

 

 

900

1555

1329

1819

2183

 

 

 

 

 

(1)the rated Mains 1 currents (In) have been determined for a rated phase-to-phase voltage of 380 V to 415 V, a battery with a

15 minute backup time (206 cells at 2 V per cell, i.e. 412 V) and at the beginning of its recharge cycle, and full rated load with a power factor of 0.9.

(2)the rated Mains 1 currents (In) have been determined for a minimum float charging voltage of 423 V and full rated load with a power factor of 0.9.

(3)the Mains 1 currents given for an overload of 25 % or 50 % are maximum values. They have been determined for a battery drawing the minimum float charging voltage and a load power factor of 0.9. When choosing the circuit breaker rating, use the "rated current" column and check that the circuit breaker tripping curves are compatible with the values in the overload columns.

The parameters given in the table below can be used to determine the required rating of the source side protective circuit breaker on the Mains 2 line for a single-unit or modular UPS.

Important:

It is essential to choose the type of circuit breaker according to its breaking capacity and the prospective short-circuit current at its place of installation.

This choice must also be made so as to protect the static switch semiconductors and ensure discrimination with respect to the UPS output fuses (refer to "appendix" chapter).

For an installation with a Static Switch Cubicle, the Mains 2 currents indicated in the table must be multipled by the number of parallel-connected rectifier-inverter cubicles required to supply the load power (i.e. without taking redundant rectifier- inverter units into account).

Remark:

If the installation includes a transformer on the Mains 2 input, allow for the inrush current caused by magnetization of the transformer windings.

Electrical parameters for Mains 2 (415 V)

rated

Mains 2 current (1)

 

 

inverter

 

 

 

rated current In

for 25 %

for 50 %

output

 

overload

overload

in kVA

 

 

 

 

 

 

 

 

800

1155

1444

1733

 

 

 

 

900

1299

1624

1949

 

 

 

 

(1)the Mains 2 currents have been determined for a rated phase-to-phase voltage of 415V, a load power factor of 0.9 and for full rated load as well as overloads of 25 % or 50 %. When choosing the circuit breaker rating, use the "rated curent" column and check that the circuit breaker tripping curves are compatible with the data in the overload columns.

For a Mains 2 voltage of 380 V, multiply the currents indicated in this table by 1.09.

For a Mains 2 voltage of 400 V, use the table in another language version of this manual.

34006451EN/AC - Page 6

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Contents Installation manual Mgetm GalaxyTM34006451EN/AC Contents Characteristics Characteristics common to all cubiclesCharacteristics of Static Switch Cubicles Static Switch CubicleCharacteristics of rectifier-inverter cubicles Rectifier-inverter cubicleElectrical parameters for Mains 2 415 Electrical parameters for selecting protective devicesElectrical parameters for Mains Rated Mains 1 current InverterElectrical parameters for determining cable cross-sections Parameters for single-unit UPS cablesInstallation with parallel frequency converters Installation with parallel UPSs with a centralised SSCNF C 15-100 authorizes a maximum of 4 cables per phase Maintenance Bypass cubicle Mains Inverter Mains 1 mains Load Side clearances provided by the spacing uprights Rear HandingPositioning the cubicles FrontCubicle footpads Rear Floor loads figureCubicle layout on false floor or normal floor figures 6, 7 Connection via the bottomLayout for a single-unit UPS with one battery cubicle Rear Power circuit wiring diagrams Diagram for a frequency converter with batteriesSpecial case Diagram for a frequency converter without batteries Example of a 2 parallel UPS rectifier-inverters with SSCModular UPS cubicle External maintenance bypass cubicle Cubicle mounting and connection Mounting of the left and right cubiclesInternal connections between cubicles XMGD05XFGD06 Left cubicle of single-unit or parallel UPS with SSC Connection of power circuitsGeneral Cross-section AAXR9 Right cubicle of single-unit UPSXR1 XR8 XR2 XR5 XR3 XR6 XR4 XR7XR2 XR5 Right cubicle of a parallel UPS with SSCFront Rear XR3 XR6 XR4 XR7Connection of auxiliary circuits on the remote relay board XR1 XR2 XR3 XR4Connections between Apoz boards Connection to battery circuit breaker QF1Emergency shutdown Connections between rectifier-inverter cubiclesXM XM XM XM Connections between Misi boards modular UPSs MisiUPS Misi Acpz board of the Static Switch Cubicle XR8 XR9 XR5 XR6 XR7Connection of the battery Temperature Monitor optional ConnectionsXR2 XR1 Temperature Monitor installation in a battery room Temperature Monitor baseDimensions of the Temperature Monitor 75 x 75 x 21 mm Final installation steps Connection of the LED remote indications unitMains 2 line protection Rated inverter output kVA Maximum permissible currentQ4S Cubicle mountingLeft cubicle XF1-XF2 XM1-XM2Right cubicle of a 2000 kVA Static Switch Front viewLeft cubicle of a 2000 kVA Static Switch FrontRear Front view Rectifier-inverter cubicle 120 to 1200 kVA Static Switch CubiclesDetails of earthing connections in the various cubicles Inverter InputKVA Static Switch Cubicles Tele-Monitor unitComz 34006451EN/AC 34006451EN/AC 34006451EN/AC 34006451EN/AC