External Suppressor Resistor; Figure 4-9 Removing The Internal Field Fuses; Table 4-16 Mentor Mp Size 1 Drive Thyristor I; Table 4-17 Mentor Mp Size 2 Drive Thyristor I - Emerson MP25A4 User Manual

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Information information Installation

Table 4-16 Mentor MP size 1 drive thyristor I

semiconductor fusing
Model
Field fuses
MP25A4 MP25A5
MP45A4 MP45A5
MP75A4 MP75A5
MP25A4(R) MP25A5(R)
MP45A4(R) MP45A5(R)
MP75A4(R) MP75A5(R)
MP105A4 MP105A5
MP155A4 MP155A5
MP210A4 MP210A5
MP105A4(R) MP105A5(R)
MP155A4(R) MP155A5(R)
MP210A4(R) MP210A5(R)

Table 4-17 Mentor MP size 2 drive thyristor I

semiconductor fusing
Model
Field fuses
MP350A4(R) MP420A4(R)
MP350A6(R) MP470A5(R)
MP700A4(R) MP825A4(R)
MP700A6(R) MP825A5(R)
MP1200A4(R) MP1200A5(R)
MP1850A4(R) MP1850A5(R)
4.6.3 Internal field fuses
The internal field 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 field fuses if the drive is tripping field loss (FdL) and
the field controller is enabled.
Isolate the power before removing the internal field fuses.
WARNING

Figure 4-9 Removing the internal field fuses

Insert a flat-head screwdriver into the groove as shown above and lever
downwards to remove the fuse cover. Refer to section 4.6.1 Ferraz
Shawmut fuses on page 40 for fuse types.
44
Electrical Getting Basic
installation started parameters
2
t rating for
2 2
Thyristor I t (A s)
400
1030
3600
15000
1030
3600
15000
80000
2
t ratings for
Thyristor I
2
(A
400
MP550A4(R) 320000
MP470A6(R) 281000
MP900A4(R) 1050000
MP825A6(R) 1200000
MP1200A6(R)
2720000
MP1850A6(R)
www.controltechniques.com
Running the SMARTCARD
Optimization
motor operation
4.7

External suppressor resistor

The Mentor MP range of drives provide internal suppression of the
voltage overshoots created by commutation of the thyristors 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 Mentor 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
The recommended external suppressor resistor selections are shown in
Table 4-18.

Table 4-18 Recommended external suppressor resistors

Model
MP25A4(R)
MP45A4(R)
MP75A4(R)
2
t
MP105A4(R)
s)
MP155A4(R)
MP210A4(R)
MP25A5(R)
MP45A5(R)
MP75A5(R)
MP105A5(R)
MP155A5(R)
MP210A5(R)
MP350A4(R)
MP420A4(R)
MP550A4(R)
MP700A4(R)
MP825A4(R)
MP900A4(R)
MP1200A4(R)
MP1850A4(R)
MP350A5(R)
MP350A6(R)
MP470A5(R)
MP470A6(R)
MP700A5(R)
MP700A6(R)
MP825A5(R)
MP825A6(R)
MP1200A5(R)
MP1200A6(R)
MP1850A5(R)
MP1850A6(R)
The following diagram shows the location of the external suppressor
resistor terminals above the L1 and L2 terminals:
Onboard Advanced Technical
PLC parameters data
Power Voltage
Resistance
rating rating
kΩ W
8.2 150 1100
15 150 1400
4.1 300 1100
8.6 300 1600
Mentor MP User Guide
UL
Diagnostics
information
Isolation
voltage
V Vrms
2500
2500
2500
2500
Issue: 3