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LEAK CURRENT HiTESTER ST5540

Updated:2025-03-13

Brand: HIOKI
Model: ST5540
Description: The ST5540 consists of measurement networks that simulate the human body and a high-frequency volt meter, and is also capable of switching power supply polarities and making measurements under simulat
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Product Details

LEAK CURRENT HiTESTER ST5540 Description：

Orientation Pack Brochure

To ensure the safe use of electrical products, electrical safety tests such as insulation resistance, withstand voltage, ground resistance, and leakage current must always be conducted. Hioki Leakage Current Testers comply with laws and standards regarding medical electrical equipment as well as non-medical electrical equipment, and can be used to measure leakage current in all types of electrical products from computers to medical equipment.

The ST5540 consists of measurement networks that simulate the human body and a high-frequency volt meter, and is also capable of switching power supply polarities and making measurements under simulated single fault conditions in equipment under test.

Leak Current Measurement - Essential to Electrical Safety

The ST5540 series features an improved measuring method and dramatically faster cycle times thanks to its uninterrupted polarity switching capability. The new devices support rated currents of up to 20A, making it more than ideal for use with products built to new standards.

Leak Current Testing of Medical Electrical Devices

In order to prevent the danger of electric shock, electrical devices use power supplies that are isolated from parts of the device that may come into contact with the body. However, it is impossible to achieve infinite insulation resistance. Some leak current always exists, and its magnitude changes as the insulation degrades over time. The LEAK CURRENT HiTESTER ST5540/ST5541 provides an easy-to-operate solution for measuring leak current in electrical devices, making it eminently suitable for use in an extensive array of applications, ranging from production lines to equipment maintenance and inspections.

Key Features

Compliance with IEC 60601-1:2005 Ed 3.0, JIS T 0601-1:2012 for medical-use electrical devices and essential to electrical safety (*1)

Compliance with Electrical Appliances and Materials Safety Act, JIS, IEC, and UL standards for general-use electrical devices

Uninterrupted polarity switching function dramatically reduces cycle time

Support for rated currents up to 20 A gives the instrument more than adequate capability for testing products designed to comply with new standards

Communications functionality and external I/O support allow automatic testing on production lines

Basic specifications

Measurement methods	Measurement of voltage drop across body simulated resistance points, Calculation and display of current values, True rms measurement, Measurement unit floats relative to instrument ground.
Measurement modes	Leak current measurement, voltage measurement, safety conductor current measurement
Standards compliance (NW: Body simulated resistance)	[NW-A] ? Electrical Appliances and Materials Safety Act [NW-B1] ? Medical electrical equipment: IEC 60601-1:1988+ A1:1993+ A2:1995, JIS T 0601-1:1999 [NW-B2] ? Medical electrical equipment: IEC 60601-1:2005+ A1:2012, JIS T 0601-1:2012 and complement 1:2014, IEC 62353 [NW-C] ? Measurement of touch current and protective conductor current: IEC 60990:2016 ? Electrical equipment for measurement, control, and laboratory use: IEC 61010-1:2010+ A1:2016 ? Information technology equipment: IEC60950-1:2005+ A1:2009+ A2:2013 ? Audio, video and similar electronic apparatus: IEC 60065:2014 ? Personnel Protection Systems for EV: UL 2231-1:2012 (Amended 2016), UL-2231-2:2012 (Amended 2016) [NW-D] ? For UL: UL 1492:1996 (Amended 2013) [NW-G] ? Electrical equipment for measurement, control, and laboratory use; current measurement circuits in damp conditions: IEC 61010-1:2010+ A1:2016
Leak current measurement	Ground leak current, 3 types of contact current, 7 types of patient leak current, patient measurement current, 4 types of total patient leak current, free current measurement, 3 types of enclosure leak current
Measurement current	DC, AC (true rms, 0.1 Hz to 1 MHz), AC+DC (true rms, 0.1 Hz to 1 MHz), AC peak (15 Hz to 1 MHz)
Measurement ranges	DC / AC / AC+DC mode: 50.00 mA/ 5.000 mA/ 500.0 μA/ 50.00 μA AC peak mode: 75.0 mA/ 10.00 mA/ 1.000 mA/ 500.0 μA
Measurement accuracy (current measurement)	DC measurement: ±2.0% rdg. ±6 dgt. (typ.) AC / AC+DC measurement: ±2.0% rdg. ±6 dgt. (15 Hz to 100 kHz, typ.) AC peak measurement: ±2.0% rdg. ±6 dgt. (15 Hz to 10 kHz, typ.)
Interfaces	External I/O, medical device relay output, USB 1.1 (communications), RS-232C
Functionality	110% voltage application, automatic test, data storage for 100 target devices, clock, data backup, printed output (optional), etc.
Power supply	100/120/220/240 V AC (specify at time of order), 50/60 Hz, 30 VA rated power
Target device power supply input	100 to 250 V AC, 50/60 Hz Rated current input from terminal block: 20 A
Target device power supply output	Output from terminal block: 20 A Output from outlet: 15 A
Dimensions and mass	320 mm (12.60 in)W × 110 mm (4.33 in)H × 253 mm (9.96 in)D, 4.5 kg (158.7 oz)
Included accessories	Test lead L2200 (for ST5540, Red ×2, Black ×1) ×1 set, Enclosure probe 9195 ×1, Power cord ×3, Spare fuse for measurement line ×1, Instruction manual ×1, CD-ROM ×1

ST5540, ST5541 List of functions (Network)

Item	ST5540	ST5541
Network A (Electrical Appliances and Materials Safety Act)	○	○
Network B (Medical-use electrical devices)	○	-
Network C (IEC 60990)	○	○
Network D (UL)	○	○
Network E (General-purpose 1)	○	○
Network F (General-purpose 2)	○	○
Network G (IEC 61010-1)	○	○

List of functions (Major functions)

Item	ST5540	ST5541
Power on polarity switching function	○	○
Rated current 20 A	○	○
Function for checking for blown fuses	○	○
Frequency band switching	○	-
110% voltage output terminal (T3 terminal)	○	-
S10, S12, S13, E terminal	○	-

List of functions (Testing leakage current mode)

Item	ST5540	ST5541
Earth leakage current	○	○
Touch current	○	○
Patient auxiliary current	○	-
Patient leakage current	○	-
Total patient leakage current	○	-
Free current	○	○
Enclosure - Earth leakage current	○	○
Enclosure - Enclosure leakage current	○	○
Enclosure - Line leakage current	○	○
Patient leakage current I	○	-
Patient leakage current II	○	-
Patient leakage current III	○	-