Monarch NICE7000, User Manual

Page: 38 / 237

NICE7000 User Manual 3 Mechanical and Electrical Installation
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Description of Main Circuit Terminals
Table 3-1 Description of main circuit terminals
Terminal Name Description
R, S, T
Three-phase power input
terminals
Provide three-phase power supply.
(+), (-)
Positive and negative
terminals of DC bus Connect the external braking unit and energy feedback
unit for models of 37 kW and above.
(+), BR (P)
Terminals for connecting
regen. resistor
Connect the regen. resistor for models of below 37 kW.
Connect the DC reactor for models of 37 kW and
above.
At delivery, the (+) and P terminals are shorted with the
jumper bar. If you need not connect the DC reactor, do
not remove the jumper bar.
U, V, W
Controller output
terminals
Connect the three-phase motor.
PE Grounding terminal Must be grounded.
L1, N EPS interface
It is the interface for the inverted 220 V power supply to
the drive control board when the 48 VDC EPS is used.
Precautions about wiring of the main circuit terminals are as follows:
•
Select the regen. resistor according to the recommended values in the regen. resistor
selection table.
•
The circuit on the output side must not be short-circuited or grounded.
•
U, V, W cables of the controller must run through the grounding metal pipe and be laid
separately or vertically with the control circuit signal cable.
•
If the motor cable is too long, electrical resonance will be generated due to the impact
of distributed capacitance, thus damaging the motor insulation or generating higher
leakage current, causing the controller to trip in overcurrent protection.
•
The requirements for the PE conductor are as follows:
- The grounding terminal of the main circuit must be tied to ground reliably, with the
grounding resistance smaller than 0.1 Ω.
- The impedance of the PE conductor/cable must be able to bear the probable maximum
short-circuit current when a fault occurs.
- Use a yellow/green cable as the PE conductor.
- Select the size of the PE conductor according to the following table.
Cross-sectional Area of a Phase
Conductor (S)
Min. Cross-sectional Area of
Protective Conductor (Sp)
S ≤ 16 mm
2
S
16 mm
2
< S ≤ 35 mm
2
16 mm
2
35 mm
2
< S S/2