Parker TPDM - Protective Earth Connections; Requirements for UL Compliance; Solid-State Motor Overload Protection; Solid-State Short-Circuit Protection

Parker Hannifin Manufacturing Srl user’s manual TPDM
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4.7 Protective Earth connections
It is necessary to minimize the length of the individual cables to be grounded. For this reason we
recommend that a grounding bar is be placed as close as possible to the frequency converters.
Length (m) Width (mm)
Thickness
(mm)
0.5
20
6
1
40
6
1.5
50
6
The grounding bar must be made of low inductance copper and must be mounted on electrical
cabinet back-plat. The table shows the minimum dimensions vs. length.
To connect the converter to the grounding bar use either one cable with a minimum section of 10
mm
2
, or two cables with the same section as power supply cables.
Use copper grounding cables.
4.8 Requirements for UL Compliance
4.8.1 Solid-State Motor Overload Protection
These devices provide Class 10 motor overload protection. The maximum internal overload
protection level (current limit) is peak output current for 2 seconds (refer to chapter “Start-up” to
setup and adjustment).
An external motor overload protective device must be provided by the installer where the motor has a
full-load ampere rating of less than 50% of the drive output rating; or when the function is disabled.
4.8.2 Solid-State Short-Circuit Protection
These devices are provided with Solid-State Short-Circuit (output) Protection. Branch circuit
protection requirements must be in accordance with the latest edition of the National Electrical Code
NEC/NFPA-70.
4.8.3 Protective earth
The (motor) protective earth (PE) has to be wired to the Protective Earth connection on the PSUP
module only (Protective Earth Connections), in accordance with the NEC NFPA 70. The TPDM
provides Motor Functional Earth connection only. Two supply protective earth connections are
required for Europe one located on the PSUP and the other located on the TPDM.
TPDM
PSU