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IT SYSTEMS ( ISOLATED SYSTEMS )
CUSTOMIZED SOLUTIONS TO HOSPITAL APPLICATIONS
IT Systems are distribution systems which are preferred less compared to Grounded Systems at Industrial Institutions. The main reason for this is to maintain the installation integrity. But due to the electrical security that it provides, IT Systems are preferred to be used at the supply of the critical divisions in the Institutions. The main difference that discriminates IT systems from Grounded Systems (PN or PP) is the non-presence of the Institution Grounding. This is obtained by isolation transformer and each load that is connected to this distribution system has its own individual grounding. These systems are mainly used in the supply of the rooms like surgery rooms at the hospitals.
IT Systems:
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The System Content
Isolation Transformer, Isolation, Load & Temperature Monitoring Device, Alarm Announcer
The System Application Area
It is installed to surgery rooms or to a location close to Nurse room.
Benefits
The isolation status is followed up continuously which secures the system. (IEC60364-7-710:2002-11, section 413.1.5). Consequently any deformation on the isolation resistor can be determined immediately and alarm signal is sent.
The energy blackout does not happen and the system operation continuity is assured.
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IT Systems Cover 4 Main Demands
-In the event of first isolation failure, energy blackout does not happen. The security equipment controls the system continuously therefore the energy blackout is prevented.
-The Medical Devices continue their normal operations.
-Fault Currents are reduced to non-critical levels which means the leakage current that is present within the room is reduced from mA levels to µA levels.
-A possible inconvenience in the surgery room is prevented where energy is reserved and blackout does not happen.
Isolation Transformer: Isolation Transformers are the main devices of Isolated Systems. With the help of isolation transformer, the supplied room is isolated from the Grounded System. Consequently the leakage current within the room is reduced from mA levels to µA levels. Besides there is also one advantage that is; in case of initial Phase-Ground short circuit, there shall be no blackout.
The hospital isolation transformers that supply the mission-critical locations should have the following important electrical features ;
-The nominal power of the transformer should be maximum 10 kVA.
-It should be Single Phase. In case of it being 3 Phase then the L-L Voltage should be 250 VAC.
-The Short Circuit Voltage should comply the Uk < % 3 condition.
-No Load Condition Current should comply the Io < % 3 condition.
-The Initial Current value should be less then 8In.
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Isolation, Load & Temperature Monitoring Device ( ILT-107-V.4)
ILT-107-V.4 is a multi-functional device produced for electrical control at Isolation Systems. The following parameters can be observed with
ILT-107-V.4 at IT Systems ;
- Isolation Resistor ( 50.500k? ) of the IT System which is Single Phase or max 3Phase ,
- Isolation Resistor of the 24 V AC IT System ( 1 or 2Phase OP Lamps) (100.500k?),
- The Load Current of the Single or Multi Phase Isolation Transformer having max. 10 kVA power ( 5.50 A),
- Transformer Temperature.
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Alarm Announcer ( BMTI4)
This device is used for management and remote monitoring of
the IT Systems used in the medical areas.
This device also has disinfected cover surface.
Alarm Announcer can be connected in serial to Isolation
Monitoring Device that is installed to IT System Distribution
Panel so that it is capable to communicate with Isolation
Monitoring Device.
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PRODUCTS
UPS
