Part Number

Rating VA (max watts)

L

 (mm)

W

(mm)

H

(mm)

Weight

kg

(inc GST)

MT 240-500

500

280

150

140

5.5

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MT 240-1000

1000

300

230

146

10

Buy Now

MT 240-2000

2000

300

230

146

16

Buy Now

•   Primary voltage 240V at 50Hz

•          Secondary voltage 240V

•          Input IEC receptable

•          Output: IEC receptable or Australian flush mounted plug

•          Designed to IEC 601-1, AS/NZS 3200.1.1 and AS3200.1

•          Low magnetic stray field high efficiency

•          Low weight

•          Low no load losses

•          Supplied with multiple IEC outlets if required

•          Other voltages available

•          Tested to IEC601-1 for special low leakage currents

•          All earthing tested to check the grounding to case

•          All units have a thermal cutout on the input side

•          Fuses on input side.

•          Soft start circuitry included

• Click for latest Medical Transformer Specification Sheet

  Prices below

  Tortech has vast experience of designing toroidal transformers to meet the requirements of IEC 601 and UL 544.

  The most important aspects of designing a transformer to UL 544 requirements are construction, leakage current, and abnormal operation as defined in UL 544 sections 19, 27, and 41, respectively. Unless the customer dictates otherwise, we use construction called out in paragraphs 19.4C or E of UL 544. These are for patient-care equipment. Paragraph C is satisfied by using a grounded copper shield between primaries and secondaries in combination with a thermal protection device. Often, our customers prefer this type of construction because the copper shield is considered a failsafe protection against electrical shock. However, this approach adds cost and may be unnecessary.

  A more economical approach is construction per paragraph E, which is satisfied by using a thermal protection device in combination with three layers of insulating material, of which any combination of two layers are capable of withstanding a 3,500 volt 60 HZ dielectric test potential for one minute.

  LEAKAGE CURRENT

  Leakage current is that current which can be conducted through the patient's body if the protective ground to the wall power cord is broken. Toroidal transformers can contribute leakage current through two paths: from primary to secondary, and from primary to mounting surface. Drawing on years of experience, our engineers can design toroidal transformers and mounting techniques that will minimize the transformer's contribution to system leakage. However, the equipment designer must also account for other components within the system that will contribute leakage current such as power cords, switches, line filters, and fuse holders.

  Tortech can measure leakage current with a tester constructed to the circuit in UL 544 figure 24.1 and section 27.5, at the customer''s request.

  ABNORMAL OPERATION

  Section 34 of UL 544 describes tests to which the transformer will be subjected in order to confirm that abnormal operation (which the system may encounter in actual service) will not present a shock or fire hazard to the patient or operator. Equipment designers should investigate the possible abnormal tests UL may perform on their particular system, then contact Tortech engineers for assistance in creating the transformer specifications. Working together with our engineers as a team, designers can be assured of accurate, functional transformers without multiple iterations, thereby cutting development costs.

  

  MEDICAL TRANSFORMERS CLOSED ISOLATED TRANSFORMERS specifications

  EN0

  Part Number	Rating VA	L  (mm)	W (mm)	H (mm)	Weight kg
  MT 240-500	500	280	150	140	5.5
  MT 240-1000	1000	300	230	146	10
  MT 240-2000	2000	300	230	146	16

   

   

   

    

  •          Primary voltage 240V at 50Hz

  •          Secondary voltage 240V

  •          Input IEC receptable

  •          Output: IEC receptable or Australian flush mounted plug

  •          Designed to IEC 601-1, AS/NZS 3200.1.1 and AS3200.1

  •          Low magnetic stray field high efficiency

  •          Low weight

  •          Low no load losses

  •          Supplied with multiple IEC outlets if required

  •          Other voltages available

  •          Tested to IEC601-1 for special low leakage currents

  •          All earthing tested to check the grounding to case

  •          All units have a thermal cutout on the input side

  •          Fuses on input side.

  •          Soft start circuitry included

  25 August 2008 11:15 AM