Spmc / U Input Current, Fuse And Cable Ratings; Emc (Electromagnetic Compatibility); Main Ac Supply Contactor; Motor Winding Voltage - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
Table 6-5 SPMC / U input current, fuse and cable ratings
Typical Maximum
input input
Model
current current
A
SPMC1402 339
SPMC2402 2 x 308 2 x 312
SPMU1401 207
SPMU1402 339
SPMU2402 2 x 339
SPMC1601 192
SPMC2601 2 x 170 2 x 173
SPMU1601 192
SPMU2601 2 x 170 2 x 173
The recommended cable sizes above are only a guide. Refer to local
wiring regulations for the correct size of cables. In some cases a larger
cable is required to avoid excessive voltage drop.
N
NOTE
The recommended cable sizes above are only a guide. The mounting
and grouping of cables affects their current-carrying capacity, in some
cases smaller cables may be acceptable but in other cases a larger
cable is required to avoid excessive temperature or voltage drop. Refer
to local wiring regulations for the correct size of cables.
Fuses
The AC supply to the drive must be fitted with suitable
protection against overload and short-circuits. Failure to
observe this requirement will cause risk of fire.
WARNING
A fuse or other protection must be included in all live connections to the
AC supply.
An MCB (miniature circuit breaker) or MCCB (moulded-case circuit-
breaker) with type C may be used in place of fuses on Unidrive SP sizes
1 to 3 under the following conditions:
• The fault-clearing capacity must be sufficient for the installation
• For frame sizes 2 and 3, the drive must be mounted in an enclosure
which meets the requirements for a fire enclosure.
Fuse types
The fuse voltage rating must be suitable for the drive supply voltage.
Ground connections
The drive must be connected to the system ground of the AC supply.
The ground wiring must conform to local regulations and codes of
practice.
6.3.1

Main AC supply contactor

The recommended AC supply contactor type for sizes 1 to 6 is AC1.
6.3.2

Motor winding voltage

Refer to the guidelines given in section 4.7.2 of the Unidrive SP User
Guide. The DC bus voltage in a regen system with a 400V supply is
usually 700V, which corresponds to an AC supply voltage of 519V.
Unless the motor cable is less than 10m long it is recommended that
either an inverter-grade motor should be used or else output chokes
should be fitted to protect the motor from the effect of the fast-rising
output voltage pulses.
6.3.3 Use of residual current device (RCD)
There are three common types of ELCB / RCD:
1. AC - detects AC fault currents
2. A - detects AC and pulsating DC fault currents (provided the DC
current reaches zero at least once every half cycle)
Unidrive SP Regen Installation Guide
Issue Number: 2
System Mechanical
design installation
Semi-conductor fuse
Typical
in series with HRC fuse
DC
HRC IEC
current
class gG UL
A Adc
class J
344 379 540
2 x 345 450
210 222 250
344 379 540
609 2 x 379 450
195 209 250
2 x 185 250
195 209 250
2 x 185 250
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Electrical Getting
Optimisation
installation started
AC input
Semi-
2
conductor
mm
IEC class aR
400 2 x 120
400 2 x 120
315 2 x 70
400 2 x 120
400 2 x 120
250 2 x 70
250 2 x 70
250 2 x 70
250 2 x 70
3. B - detects AC, pulsating DC and smooth DC fault currents
• Type AC should never be used with drives.
• Type A can only be used with single phase drives
• Type B must be used with three phase drives
Only type B ELCB / RCD are suitable for use with 3-phase
inverter drives.
WARNING
6.4

EMC (Electromagnetic compatibility)

The requirements for EMC are divided into three levels in the following
three sections:
Section 6.5.2, General requirements for all applications, to ensure
reliable operation of the drive and minimise the risk of disturbing nearby
equipment. The immunity standards specified in section 11 will be met,
but no specific emission standards. Note also the special requirements
given in Surge immunity of control circuits - long cables and connections
outside a building in the EMC section of the Unidrive SP User Guide for
increased surge immunity of control circuits where control wiring is
extended.
Section 6.5.3, Requirements for meeting the EMC standard for
power drive systems, IEC61800-3 (EN61800-3).
Section 6.5.4, Requirements for meeting the generic emission
standards for the industrial environment, IEC61000-6-4, EN61000-6-4,
EN50081-2.
The recommendations of section 6.5.2 will usually be sufficient to avoid
causing disturbance to adjacent equipment of industrial quality. If
particularly sensitive equipment is to be used nearby, or in a non-
industrial environment, then the recommendations of section 6.5.3 or
section 6.5.4 should be followed to give reduced radio-frequency
emission.
In order to ensure the installation meets the various emission standards
described in:
• The EMC data sheet available from the supplier of the drive
• The Declaration of Conformity at the front of this manual
• Chapter 10 Technical data
...the correct external EMC filter must be used and all of the guidelines in
section 6.5.2 General requirements for EMC and section
6.5.4 Compliance with generic emission standards must be followed.
Technical Component
Parameters
data sizing
Cable sizes
DC output
2
AWG AWG
mm
2 x 4/0 2 x 120 2 x 4/0
2 x 4/0 2 x 120 2 x 4/0
2 x 2/0 2 x 70 2 x 2/0
2 x 4/0 2 x 120 2 x 4/0
2 x 4/0 2 x 120 2 x 4/0
2 x 2/0 2 x 120 2 x 4/0
2 x 2/0 2 x 120 2 x 4/0
2 x 2/0 2 x 120 2 x 4/0
2 x 2/0 2 x 120 2 x 4/0
Diagnostics
77