CPS Clinical Power Supply

According to DIN VDE 0100-710 (November 2002)

A maximum of safety for patients due to CPS-MEDISAFE for AC voltage load (230 Volt)

General information

For the protection of the patients it is indespensable to employ a clinical power supply in operating rooms and also in rooms for medical use.

In the case of outage or an interruption of the general power supply, the alternative power supply is operable in an unimpeachable way. An operating time of three hours (one hour if a generator exists) has to be warranted by the connected battery system.

The part 0100-710 “Construction of low voltage systems, requirements for branches, rooms and systems with specific character – rooms for medical use“ of the DIN VDE appoints the opening of the outgoing line fuses during the battery system is working. This feature differs the CPS-MEDISAFE-Unit from other UPS-Units for computer systems.

Modes of the static CPS-MEDISAFE-Units

There are two modes of the static CPS-Units which can be used in according to the requirements of the consumer.

• Stand-by operation with an electronical switch

During the stand-by operation the rectifier feeds the inverter with idling current. In the case of outage the CPS-MEDISAFE-Unit will be connected by a switch nearly without any interruption (<10 ms).

• Permanent operation (online)

During the permanent operation the inverter feeds the rectifier with full load current so that there is no interruption in the supply-unit in the case of outage.

• Charger with a isolating transformer
• Battery-system
• Static inverter or rotating inverter (it depends on the requirements)with an electronical switch
  
• DC Earth-fault monitoring
• Detection system and exerciser MEDISAFE
• Journalising via printer (optional)
• Bus-system-connection (optional)
• New visualisation via Ethernet (optional)

The CPS-MEDISAFE-Unit feeds the external annunciator panel with 24V DC or alternatively controlled by a BUS-system. The detector contact is carried via terminals.

The charging device

The charging device in the CPS-MEDISAFE-Unit operates in accordance with an IU-characteristic to DIN 41773. This design compensates variation of mains voltage from ±10% changing of frequency from ±4%. The output voltage is kept constant to ±1 %.

The continuous charging voltage ensures that the battery is fully charged and will not be damaged.

The charging device is well determined so that the amount of electricity taken during a case of need is recharged within 6 hours.

Technical data

Main connection: D 400 V ±10%, N, PE
Frequency: 50 Hz ±4%
Degree of radio interference: EN 55014
Noise level: max. 60 dB (A) (Measured by far 1 m and half size of the unit)
Permitted temperature range: -5°C up to +40°C
Nominal direct voltage: 220 V, optional 110 V (performance-related)
Charging rectifier: in accordance with IU-characteristic (DIN 41773)

Quantity of battery cells

Lead accumulators (Lead-acid or valve regulated lead-acid batteries): 54/55 or 108/110 or 192 Cells

NiCd-accumulators: 90 or 180 Cells

Technical Data

Maximum allowance of input voltage: +20% / -15%
Control response time for the tolerance limit: ±2% in 10 ms
Static output voltage: monophase 230 V ±1 %, three-phase 400 V ±1 %
Wave form of the output voltage: sinusoidal
Distortion factor: less 3 %
Frequency: 50 Hz ±0,01 %
Sector of power factor: 0,8 inductive up to 1
Degree of efficiency: 88 - 93% according to capacity
Degree of radio interference: EN 55014
Current limiting: The units are short-circuit proofed.
Overload performance: 1,25-fold for 15 min
Short-circuit current: depending on there leasing fuse <500 ms

Detection system and exerciser MEDISAFE

The electronic detection system and exerciser MEDISAFE performs all necessary monitoring and function tests. Disturbances are collected in the detector memory.

All results e.g. battery voltage or the current of the unit are shown in the display at the front door of the unit.

The memory can be read out with an intern or extern printer. If there is no print-out required it is possible to leaf through the memory aback or to notice the wanted happening in the display by entering the date. The memory contains > 2000 entries.

During the function and the capacity test of the ZSV-MEDISAFE-Unit the taken energy of the batteries is inducted back into the supply network system in a cost-saving way.

Detection system and exerciser MEDISAFE

Technical Data / Digital display of:

The LED`s in the Display provide detailed information about the topical condition of the unit:

• Network monitoring
• Load in the net
• Rectifier charge
• Battery circuit disturbed
• Rectifier discharge
• Function test / capacity test
• Rectifier disturbance
• Inverter disturbance
• Loading in the inverter
• Revision “On“