External Suppressor Resistor; Table 4-17 Quantum Mp Frame 1 Drive Scr I; Table 4-18 Recommended External Suppressor Resistors - Emerson Quantum MP QMP45A4 User Manual

Safety Product Mechanical
Information Information Installation
4.9.2 Alternative fusing
Please refer to section 12.2.1 Fuses on page 150.

Table 4-17 Quantum MP frame 1 drive SCR I

semiconductor fusing
Model
Auxiliary
QMP45A4(R)
QMP75A4(R)
QMP155A4(R)
QMP210A4(R)
4.9.3 Internal auxiliary fuses
The internal auxiliary fuses provide protection to the field controller. The
fuses can rupture if there is a fault in the field circuit. The user should
check the internal auxiliary fuses if the drive is tripping field loss (FdL)
and the field controller is enabled.
Isolate the power before removing the auxiliary fuses.
WARNING
Figure 4-9 Removing the internal auxiliary fuses (size 1 shown)
Insert the screwdriver into the groove as shown above and lever
downwards to remove the fuse cover. Refer to section 4.9.1 for fuse types.
4.10

External suppressor resistor

The Quantum MP range of drives provide internal suppression of the
voltage overshoots created by commutation of the SCRs in the power
stage during the operation of the product. The internal suppression is
suitable for typical applications using recommended line reactors as
defined in section 4.4 Line reactors on page 37. The Quantum MP
drives provide the facility to allow for extra suppression for applications
at the boundaries of the drive's operating area. Applications which may
require an external suppression resistor to be installed have some or all
the following characteristics:
1. Supplies rated ≥10kA with less than the recommend line reactance.
2. High line-to-line voltage
42
Electrical Getting Basic
Installation Started parameters
2
t rating for
2 2
SCR I t (A s)
400
3600
15000
80000
Running the SMARTCARD
Optimization
Motor Operation
The recommended external suppressor resistor selections are shown in
Table 4-18.

Table 4-18 Recommended external suppressor resistors

Model
QMP45A4(R)
QMP75A4(R)
QMP155A4(R)
QMP210A4(R)
QMP350A4(R)
QMP400A4(R)
QMP550A4(R)
QMP700A4(R)
The following diagram shows the location of the external suppressor
resistor terminals above the L1 and L2 terminals:
Figure 4-10 Location of external suppressor resistor terminals,
Size 1
www.emersonct.com
Onboard Advanced Technical
PLC Parameters Data
Power Voltage
Resistance
rating rating
k Ω
W
8.2 150 1100
4.1 300 1100
To external suppression resistor
Quantum MP User Guide
UL
Diagnostics
Information
Isolation
voltage
V Vrms
2500
2500
Issue: A3