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  1. farmer2

    EMC Test Lab in Shanghi

    Has anyone had EMC tests per 2004/108/EC performed by SGS-CSTC in Shanghi? The tests are on low voltage DC motors and under the machinery directive they do not have to be tested by a notified body lab. This lab is not a notified body. Any comments?
  2. farmer2

    Motor Brush Noise

    Followup: The motors passed tests by reducing the metal content of brushes in most of the motors while a couple required capacitors between the armature and ground. Two different cap sizes were used. A .047 microfarad and 1 microfarad. Thanks to all for your help.
  3. farmer2

    CE Declaration From a Non-European Company

    Has anyone heard of a requirement that a CE self-declaration be signed only by a European company?
  4. farmer2

    E-Stop for Hydraulic Powered Equipment

    Can someone describe the E-Stop for a hydraulic circuit required by the EN standard. For operation, the equipment will have either a manual control valve or solenoid operated control valve.
  5. farmer2

    Motor Brush Noise

    The emc test lab measures emissions in units of dB micro volts per meter. The emissions on a motor, tested at an emc lab, were slightly over the max. in the 40-45 mhz frequency range. A .047 micro farad capacitor was added from the field to ground and had no effect on emc emissions. The motor...
  6. farmer2

    Motor Brush Noise

    I want to compare 24 volt DC motor brush noise between several motors in order to determine which brush material or capacitor addition gives the lowest EMC emissions? What instrument could be used for this instead of having to send each motor to an EMC test lab? Once the motor with the lowest...
  7. farmer2

    is there any rotatng machine standard for IP66 protection in IEC

    IEC 529 describes the degrees of protection and how to test.
  8. farmer2

    Emergency Shutdown Switch per IEC 60947-5-1

    The solenoids control the motor rotation direction. The IN solenoid runs the winch in, the OUT solenoid runs the winch out. If power is lost for any reason, a brake mechanically stops movement. If the E-stop is between the rocker switch and the shutdown solenoid, then if it de-energises, the...
  9. farmer2

    Emergency Shutdown Switch per IEC 60947-5-1

    Thanks, ScottyUK. There are 2 solenoids to operate the motor-one solenoid to run clockwise and one to run CCW. They are operated by a two-push button (hold to run) remote pendant. Between the battery and the solenoid assy is the emergency shutdown solenoid, which is operated by a rocker switch...
  10. farmer2

    Emergency Shutdown Switch per IEC 60947-5-1

    Thanks, ScottyUK. What you say makes sense. Looks like we would want to use the stay-put, either pull to release or the button release. If I understand the spring return, it is momentary, so the stop solenoid would not stay open. Would the pull to release be the best choice? This looks like...
  11. farmer2

    Emergency Shutdown Switch per IEC 60947-5-1

    Thanks ScottyUK and dpc, We currently have two types of emergency shutdowns. One is as you describe: it is a NC solenoid (separate from the winch operating solenoids) in the + cable and a toggle switch is used to open the solenoid to shutdown power to the main solenoid. The problem is with this...
  12. farmer2

    Emergency Shutdown Switch per IEC 60947-5-1

    I am looking for a push-button operated emergency shutdown switch for use at up to 400 amps, 12V DC and up to 200 amps, 24V DC for winches per an EN standard. These are full-load amps for the winches. At stall torque the motor may draw 50% higher current which I assume should be the max. switch...
  13. farmer2

    Does anyone have EN 60204-32:1998?

    I now have the emergency stop info. Thanks.
  14. farmer2

    Does anyone have EN 60204-32:1998?

    Ussuri, How large is the section on emergency stops? Thanks,
  15. farmer2

    Actuator type?

    Having worked in the winch industry for many years, I would not recommend using the 3000 lb 12v remote controlled winch as suggested. Even though the rating is sufficient and the lift is a short distance, winches are not for hoisting and this type winch is typically mfg in China, with an...
  16. farmer2

    Does anyone have EN 60204-32:1998?

    Ussuri, Thanks very much! You are a great help. I am consulting with a company on winches to meet a new winch standard, EN 14492-1:2006. In the body this std, says winches to meet En 60204-32:1998, 4.4.2. I notice this section says must meet EN 50081 and 50082-2 emission and immunity...
  17. farmer2

    Mechanical Aptitude Test

    Thanks for a lot of good ideas. The DTS test looks good but I wonder how long it would take the average person to complete.
  18. farmer2

    Does anyone have EN 60204-32:1998?

    I need to know what sect. 4.4.2 says. The product of interest is winches. Could someone give me a brief description of what this section covers so I can decide if it is worth buying the entire standard. The standard costs almost $400.
  19. farmer2

    Mechanical Aptitude Test

    Thanks to all for replies. CoreBlimeyLimey, The equipment is for a tree service, which has truck mounted man lifts, saws, tools, etc. So we are talking mechanical, hydraulic and I assume light electric troubleshooting. The applicant hired would also work in the field supervising job foremen.
  20. farmer2

    EN 61000-6-2 and -6-4 EMC Test Stds

    Does anyone know if these stds specify the test points or duty cycle test? Have a product with both 12v and 24v DC motors and wondered if they need to be tested at maximum load rating, no load or some other load? Also, any way to determine before test whether a 12v or 24v motor is worst case...

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