Zero-Phase Reactor; Installing Fuses On The Input Side; Attachment For External Heatsink; Noise Filter Installation - YASKAWA J1000 Technical Manual

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Zero-Phase Reactor

A zero-phase reactor can be used to reduce the noise on the input and output sides of the drive.
A – Power supply
B – MCCB
C – Zero-phase reactor on input side
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Installing Fuses on the Input Side

Always install input fuses to the input side of the as a protective measure against damage caused by a short circuit.
Refer to Factory Recommended Drive Branch Circuit Protection on page 243
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Attachment for External Heatsink

An external attachment can be used to project the heatsink outside of an enclosure to ensure that there is sufficient air circulation
around the heatsink. This installation method still requires a certain amount of airflow over the drive case.
Current Derating Due to Ambient Temperature on page 186
for more information.
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Noise Filter Installation

This drive has undergone testing in conformance with IEC61800-5-1: 2007 and is in compliance with low voltage directives.
Refer to EMC Guidelines Compliance on page 236
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Installing a Motor Thermal Overload (oL) Relay on the Drive Output

Motor thermal overload relays protect the motor by disconnecting power lines to the motor due to a motor overload condition.
Install a motor thermal overload relay between the drive and motor:
• When operating multiple motors on a single AC drive.
• When using a power line bypass to operate the motor directly from the power line.
It is not necessary to install a motor thermal overload relay when operating a single motor from a single AC drive. The AC
drive has UL recognized electronic motor overload protection built into the drive software.
Note: Disable the motor protection function (L1-0 1 = "0") when using an external motor thermal overload relay. The relay should shut off main
power on the input side of the main circuit when triggered.
n General Precautions when Using Thermal Overload Relays
The following application precautions should be considered when using motor thermal overload relays on the output of AC
drives in order to prevent nuisance trips or overheat of the motor at low speeds:
• Low speed motor operation
• Use of multiple motors on a single AC drive
• Motor cable length
• Nuisance tripping resulting from high AC drive carrier frequency
Low Speed Operation and Motor Thermal oL Relays
Generally, thermal relays are applied on general-purpose motors. When general-purpose motors are driven by AC drives, the
motor current is approximately 5 ~ 10% greater than if driven by the commercial power supply. In addition, the cooling capacity
of a motor with a shaft-driven fan decreases when operating at low speeds. Even if the load current is within the motor rated
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
D
C
B
A
R/L1 U/T1
S/L2 V/T2
T/L3 W/T3
Figure 8.10 Zero-Phase Reactor
for information on selecting a noise filter.
http://nicontrols.com
8.4 Installing Peripheral Devices
Close-up of V/T2-phase wiring
E
1st pass
2nd pass
F
3rd pass
4th pass
Pass each wire (U/T1, V/T2, W/T3)
through the core 4 times.
D – Drive
E – Zero-phase reactor on output side
F – Motor
for details on input fuse selection.
if derating is required. Contact a Yaskawa sales representative
Refer to Output
8
171