Leak Current Measurement, an Essential Part of Electrical Safety
(for electrical devices)
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 ST5541 provides support for standard-compliant networks (excluding medical-use electrical devices).
| ST5541 | For electrical devices |
|---|
There are various standards in place concerning networks (body simulated resistance), and a standard-compliant network is required in order to make measurements.
ST5541 provides standard support for standard-compliant networks (excluding medical-use electrical devices).
Combination of Instruments for Leak Current Testing and Safety Conductor Testing
The following are key parts of any safety inspection of electrical equipment:
•Leak current test: Measure with the ST5540 and ST5541.
•Safety conductor test (also known as a ground line resistance test or ground conductor test): Measure with the 3157.
The 3157 can also be used for conducting measurements under the JIS T 1022:2006 safety standard for hospital electrical equipment.
There are various standards in place concerning networks (body simulated resistance), and a standard-compliant network is required in order to make measurements.
ST5541 provides standard support for standard-compliant networks (excluding medical-use electrical devices).
Combination of Instruments for Leak Current Testing and Safety Conductor Testing
The following are key parts of any safety inspection of electrical equipment:
•Leak current test: Measure with the ST5540 and ST5541.
•Safety conductor test (also known as a ground line resistance test or ground conductor test): Measure with the 3157.
The 3157 can also be used for conducting measurements under the JIS T 1022:2006 safety standard for hospital electrical equipment.
There are various standards in place concerning networks (body simulated resistance), and a standard-compliant network is required in order to make measurements.
ST5541 provides standard support for standard-compliant networks (excluding medical-use electrical devices).
Combination of Instruments for Leak Current Testing and Safety Conductor Testing
The following are key parts of any safety inspection of electrical equipment:
•Leak current test: Measure with the ST5540 and ST5541.
•Safety conductor test (also known as a ground line resistance test or ground conductor test): Measure with the 3157.
The 3157 can also be used for conducting measurements under the JIS T 1022:2006 safety standard for hospital electrical equipment.
| 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-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, free current measurement, 3 types of enclosure leak current | |||||
| Measurement current | DC, AC (true rms, 15 Hz to 1 MHz), AC+DC (true rms, 15 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, USB 1.1 (communications), RS-232C | |||||
| Functionality | 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 (Red ×1, Black ×1) ×1 set, Enclosure probe 9195 ×1, Power cord ×3, Spare fuse for measurement line ×1, Instruction manual ×1, CD-ROM ×1 | |||||
| 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) | ○ | ○ | ||||
| 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 | ○ | - | ||||
| 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 | ○ | - | ||||
