Medical
Developed for power supply of the medical equipment and the organization of transformation of a TN-S network to an IT network (the mode of the isolated neutral) with continuous monitoring of isolation of a network and parameters of the transformer.
Distinctive features:
IT networks are obligatory to application for:
Unlike transformers of common industrial application with reloading ability of 10%, the medical dividing transformers have to maintain; an overload in 60% within an hour; without damage to isolation (IEC 61558-2-15 "Safety of the power transformers and other power equipment. Section 2-15. Special requirements to power transformers of medical institutions")
Note: the IEC standard is "import" and is optional to execution in the territory of Russia.
The shielding winding
This requirement reduces probability of breakdown of isolation between primary and secondary networks in case of failure of the transformer and significantly reduces the leak currents caused by "parasitic" capacity between windings. The dividing transformer with the shielding winding is the filter of high-frequency hindrances that is very positive affects operation of the equipment.
Increased requirements to isolation resistance
Test tension between windings and windings and the case - 4150 V.
System of restriction of starting current
Starting current of the ordinary transformer makes from 5 to 8 times working current that can cause operation of machine guns of protection standard execution from a power line and to influence work the third-party equipment, initiating a short-term failure of tension power supply.
Deviation of output tension idling and under loading no more than 5% from input.
Monitoring system of current and temperature of windings of the transformer
Thanks to measurement of these parameters the personnel receives the quick information on a network overload also carries out necessary actions (for example, disconnects not used loadings).
Isolation monitoring system
The monitoring system with an advancing warns about deterioration of isolation and about excess of admissible parameters of work. The service personnel has time for check of the equipment, won't come its final yet damage.
Post of remote control of the transformer (PDK)
Provides visual control of parameters of a network and a condition of the dividing transformer in a zone of work of the personnel.
Note: according to GOST P 50571.28 - 2007 in chains before and after the dividing transformer have to be applied; machine guns with level protection against an overload allowing a transformer overload for 60% in current of hour or machine guns without thermal rastsepitel.
Rated power of medical transformers has to be in limits of 0,5 - 10 kVA.
Protection degree: IP20; IP54.
Basis of the medical transformer is dividing the transformer providing galvanic division of loading and power line. Three-phase models have three single-phase transformers, included according to the scheme "Star".
Medical dividing transformers have a number of the specific qualities, characteristic for the medical equipment, which are ordered by the corresponding medical standards.
TR series transformers – ххххМ represent the finished design with transformers, automatic machines for an entrance and an exit, system isolation control, control of temperature of the transformer and current of loading.
Have an exit for connection of a post of remote control PDK–02;
Transformers are carried out with the shielding winding and the device decrease in starting current. Contain the additional isolated tire for organizations of functional grounding (FE).
Keep working capacity at overloads to 60% within an hour.
Warranty period – 3 years from the date of sale.
Distinctive features:
- The increased load ability
- Existence of the shielding winding
- System of restriction of starting current
- Deviation of output tension idling and under loading no more than 5% from input.
- Monitoring system of current and temperature of windings of the transformer
- The monitoring system of isolation of the transformer and the connected network
- Natural ventilation of transformers
- High level of isolation of windings
- Exit of connection of a post of remote control (to 4 posts of maximum concentration limit from one transformer)
- Low noisiness.
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MEDICAL DIVIDING
TRANSFORMERS THE SINGLE-PHASE |
MEDICAL DIVIDING
TRANSFORMERS THREE-PHASE |
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- power supply of the medical equipment and life support systems the medical institutions located "in a zone of an environment of the patient" in rooms gr.2.
- power supply of the mobile or transported medical installations at connection to a stationary electric network.
- power supply of stationary objects of medical appointment at their power supply from air-lines with tension to 1 kV executed uninsulated wires.
The medical transformer conforms to standards and possesses such qualities, as:
The increased load abilityUnlike transformers of common industrial application with reloading ability of 10%, the medical dividing transformers have to maintain; an overload in 60% within an hour; without damage to isolation (IEC 61558-2-15 "Safety of the power transformers and other power equipment. Section 2-15. Special requirements to power transformers of medical institutions")
Note: the IEC standard is "import" and is optional to execution in the territory of Russia.
The shielding winding
This requirement reduces probability of breakdown of isolation between primary and secondary networks in case of failure of the transformer and significantly reduces the leak currents caused by "parasitic" capacity between windings. The dividing transformer with the shielding winding is the filter of high-frequency hindrances that is very positive affects operation of the equipment.
Increased requirements to isolation resistance
Test tension between windings and windings and the case - 4150 V.
System of restriction of starting current
Starting current of the ordinary transformer makes from 5 to 8 times working current that can cause operation of machine guns of protection standard execution from a power line and to influence work the third-party equipment, initiating a short-term failure of tension power supply.
Deviation of output tension idling and under loading no more than 5% from input.
Monitoring system of current and temperature of windings of the transformer
Thanks to measurement of these parameters the personnel receives the quick information on a network overload also carries out necessary actions (for example, disconnects not used loadings).
Isolation monitoring system
The monitoring system with an advancing warns about deterioration of isolation and about excess of admissible parameters of work. The service personnel has time for check of the equipment, won't come its final yet damage.
Post of remote control of the transformer (PDK)
Provides visual control of parameters of a network and a condition of the dividing transformer in a zone of work of the personnel.
Note: according to GOST P 50571.28 - 2007 in chains before and after the dividing transformer have to be applied; machine guns with level protection against an overload allowing a transformer overload for 60% in current of hour or machine guns without thermal rastsepitel.
Rated power of medical transformers has to be in limits of 0,5 - 10 kVA.
Design of system
Medical dividing transformers represent floor blocks. Case elements are made of metal and painted wearproof polymeric covering. Color – gray RAL 7035.Protection degree: IP20; IP54.
Basis of the medical transformer is dividing the transformer providing galvanic division of loading and power line. Three-phase models have three single-phase transformers, included according to the scheme "Star".
Medical dividing transformers have a number of the specific qualities, characteristic for the medical equipment, which are ordered by the corresponding medical standards.
TR series transformers – ххххМ represent the finished design with transformers, automatic machines for an entrance and an exit, system isolation control, control of temperature of the transformer and current of loading.
Have an exit for connection of a post of remote control PDK–02;
Transformers are carried out with the shielding winding and the device decrease in starting current. Contain the additional isolated tire for organizations of functional grounding (FE).
Keep working capacity at overloads to 60% within an hour.
Warranty period – 3 years from the date of sale.
Circuit executions of transformers