Salicru SLC TWIN PRO Series, User Manual

5

SALICRU

• 

If 

the instructions are not in total or partial and in 

special referred to the safety, do not carry on with 

the installation or commissioning tasks

, because there 

could be a 

risk on your safety or on the other/s persons,

being able to make 

serious injuries even the death

, also it 

can 

cause damages to the equipment and/or to the loads 

and installation

.

• 

The local electrical regulations and the different re-

strictions of the client's site, they can invalidate some 

recommendations included in the manuals. When discrepan-

cies exist, the user has to comply the local regulations.

• 

The equipments provided with power cord with plug 

and outlets, can be connected and used by personnel 

without any kind of experience.
The equipments with power blocks have 

to be installed by 

qualified personnel

 and it can be used by personnel with 

not specific training, just with only help of this manual.
A person is defined as 

qualified

, if it has experience of as-

sembling, commissioning and perfect control operating of 

the equipment, if he has the requirements to do the job and 

if has read and understand all the things described in this 

manual, in particular the safety indications. Such preparation 

is considered only valid if it is certified by our 

S.T.S.

.

• 

Place the equipment the closest to the power supply and 

loads to be supplied, leaving an easy access if it were needed 

an urgent disconnection.
In the hardwired equipments and due to the impossibility of 

fast disconnection, a diconnection device (switch) with easy 

access and close to the equipment will be installed.

• 

Warning labels should be placed on all primary power 

switches installed in places away from the equipment to alert 

the electrical maintenance personnel of the presence of a 

UPS in the circuit 
The label will bear the following text or an equivalent one:

Before working in this circuit.

• 

Isolate the Uninterruptible Power System (UPS).

• 

Check the voltage between all terminals including the 

protective earth.

Risk of voltage feedback from UPS.

1.2.3.1.  General safety warnings.

• 

All connections and disconnections of the cables from the 

equipment, including the control ones, will be done with no 

power supply and the switches on rest, position «O» or «Off».

• 

Shutdown the equipment completely by switching «Off» the 

button of the control panel first. Next disconnect the cable 

from the wall outlet for equipments up to standard 3 kVA or by 

switching «Off» the input circuit breaker of the installation and 

disconnect the power supply cables in models of the 3 kVA B1 

or higher power rate.

 The indiscriminate manoeuvring of the switches may 

involve production losses and/or equipment dam-

ages. Consult the documentation before doing any action 

• 

Pay special attention to the labelling of the equipment 

that warns about the «Electrical shock hazard». Inside 

the equipment there are dangerous voltages, never open the 

enclosure, the access has to be done by qualified staff. In 

case of maintenance or fault, consult to the closest (

S.T.S.

).

• 

Cross cable sections used to supply the equipment and loads, 

will be according to the nominal current stated in the nameplate 

label of the equipment, and respecting the Low Voltage Electro-

technical Regulations or standards of the country.
Use approved cables only

• 

Protection Earth cable of the UPS drives the leakage 

current of the load devices. An isolated earth cable has 

to be installed as part of the circuit that supplies the equip-

ment. Cross cable section and its features will be same as 

the power supply cables, but with green colour with or without 

the yellow strip.
All outlets of the UPS has an earth bonding, duly connected 

and those equipments with power blocks there is an exclusive 

terminal for the load earth connection. When an outgoing dis-

tribution is done, i.e power strips, it is essential that they have 

an earth terminal connected to each one of them.
It is essential that the cables that supplies the loads have the 

earth connection cable. 

The protection earth must be connected to the frame 

or metallic chassis of any electrical equipment (in our 

case to the UPS, battery cabinet or case and loads), assuring 

that it is done before connecting the input voltage.
Check the quality and availability of the earth, it has to be 

between the defined parameters by the local or national 

regulations.

• 

For the smallest devices (the ones connected with the fore-

seen power cord with plug), the user has to check the wall 

outlet corresponds with the type of supplied plug, with earth 

duly installed and connected to the local protection earth.

• 

During the normal UPS operation, in equipments up to 

3kVA the power cord cable can't be disconnected 

from wall outlet, because the protection earth of the own UPS 

would be disconnected and also the earth from the loads 

connected to the output.
For this reason, the general protection earth cable of the 

building or switchgear panel that supplies the UPS will not 

be disconnected.

• 

In small equipments (the ones connected with the foreseen 

power cord with plug), check that the sum of the leakage currents 

of the UPS and connected load/s do not exceed over 3,5mA.

• 

The installation will have input protections sized to the cur-

rents of the equipment and stated in the nameplate label 

(RCD devices type B and circuit breakers with C character-

istic or any other equivalent one).
For equipments with three phase input, and connected to 

an IT distribution system, the protection will be four poles in 

order to break the three phases and neutral in the same ma-

noeuvring.
Overload conditions are considered as a nonpermanent an 

exceptional operating mode, so these currents will not be 

kept in mind when sizing the protections.

• 

Do not overload the UPS by connecting loads with inrush 
consumptions at its output, like laser printers.

• 

For those installations with redundant equipments or sepa-

rate Bypass line, there will only be a common RCD of 300 to 

500 mA at the head of the installation for both lines.

• 

Output protection will be done with a circuit breaker of C char-

acteristic or an equivalent one.
It is recommended to distribute the output power, into four 

lines as minimum. Each one of them will have a protection 

circuit breaker sized to the quarter of the nominal power. 

This kind of outgoing distributions will allow that any fault in 

any device connected to the equipment, that makes a short-

circuit, will affect to the line with the faulty device only. An 

uninterruptible power supply will be guaranteed to the rest of 

connected loads, due to the protection tripping of the affected 

line by the short-circuit only.