Chapter 1 Safety Information and Precautions
Shenzhen Hpmont Technology Co., Ltd.
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HD3N Series User Manual V1.1
Check the insulation of the motor
For the first time using the motor or after long time storage, it needs check the insulation of the motor.
Worse insulation can cause damage to HD3N.
Note:
Use a 500V Mega-Ohm-Meter to test and the insulation resistance must be higher than 5Mohm.
Load and negative torque
For the occasion to boost load and the like, negative torque often occurs. Consider setting proper
parameters of the braking unit if HD3N is prone to overcurrent or overvoltage fault trip.
Requirement for leakage current protector RCD
Since the device generates high leakage current which goes through the protective grounding
conductor, please install B type leakage current protector RCD on one side of the power supply.
For the selection of RCD, users need to consider the possible problems of ground leakage current in
both transient status and steady status at start and during running. It is recommended to choose
either special RCD that can suppress the higher harmonics, or general RCD that has more aftercurrent.
Warning for ground mass leakage current
The device generates mass leakage current, so users need to confirm the reliable grounding before
connect to the power supply. The grounding should comply with the local relative IEC standard.
1.3
About HD3N
No capacitor or varistor on the output side
Since HD3N output is PWM wave, it is strictly forbidden to connect capacitor for improving the power
factor or varistor for lightning protection to the output terminals so as to avoid HD3N fault trip or
component damage.
Contactors and circuit breakers connected to the output of HD3N
If circuit breaker or contactor needs to be connected between HD3N and the motor, be sure to operate
these circuit breakers or contactor when HD3N has no output, so as to avoid any damage to HD3N.
Running voltage
HD3N is prohibited to be used beyond the specified range of running voltage. If needed, please use
the suitable voltage regulation device to change the voltage.
Capacitor energy storage
When the AC power supply is cut off, capacitor of HD3N sustains deadly power for a while. So to
disassemble HD3N that is powered, please cut off the AC power supply for more than 10 minutes,
confirm the internal charge indicator is off and the voltage between (+) and (-) of the main circuit
terminals is below 36V.
Generally, the internal circuit enables the capacitor to discharge. However, the discharging may fail in
some exceptions. In these cases, users need to consult Hpmont or our regional distributor.
