2-17
H
Wiring on the Input Side of the Main Circuit
D
Installing a Molded-case Circuit Breaker
Always connect the power input terminals (R/L1, S/L2, and T/L3) and power supply via a molded case
circuit breaker (MCCB) suitable to the Inverter.
•
Install one MCCB for every Inverter used.
•
Choose an appropriate MCCB capacity according to the
Circuit breaker capacity
column in the table
on the previous page.
•
For the MCCB’s time characteristics, be sure to consider the Inverter’s overload protection (one min-
ute at 150% of the rated output current).
•
If the MCCB is to be used in common among multiple Inverters, or other devices, set up a sequence
such that the power supply will be turned off by a fault output, as shown in the following diagram.
3-phase/Single-phase
200 V AC
3-phase 400 V AC
Power
supply
Inverter
Fault output
(NC)
D
Installing a Ground Fault Interrupter
Inverter outputs use high-speed switching, so high-frequency leakage current is generated.
In general, a leakage current of approximately 100 mA will occur for each Inverter (when the power
cable is 1 m) and approximately 5 mA for each additional meter of power cable.
Therefore, at the power supply input area, use a special-purpose breaker for Inverters, which detects
only the leakage current in the frequency range that is hazardous to humans and excludes high-fre-
quency leakage current.
•
For the special-purpose breaker for Inverters, choose a ground fault interrupter with a sensitivity am-
perage of at least 10 mA per Inverter.
•
When using a general leakage breaker, choose a ground fault interrupter with a sensitivity amperage
of 200 mA or more per Inverter and with an operating time of 0.1 s or more.
D
Installing a Magnetic Contactor
If the power supply of the main circuit is to be shut off because of the sequence, a magnetic contactor
can be used instead of a molded-case circuit breaker.
When a magnetic contactor is installed on the primary side of the main circuit to stop a load forcibly,
however, the regenerative braking does not work and the load coasts to a stop.
Design
Chapter 2
Summary of Contents for SYSDRIVE 3G3JV-A4002
Page 1: ...USER S MANUAL SYSDRIVE 3G3JV Compact Simplified Inverters Cat No I528 E1 04...
Page 3: ...USER S MANUAL Compact Simplified Inverter SYSDRIVE 3G3JVSERIES...
Page 16: ......
Page 20: ...Chapter 1 Overview 1 1 Function 1 2 Nomenclature 1...
Page 26: ...Chapter 2 Design 2 1 Installation 2 2 Wiring 2...
Page 57: ...Chapter 3 Preparing for Operation and Monitoring 3 1 Nomenclature 3 2 Outline of Operation 3...
Page 65: ...Chapter 4 Test Run 4 1 Procedure for Test Run 4 2 Operation Example 4...
Page 216: ...Chapter 10 List of Parameters 10...
Page 229: ...Chapter 11 Using the Inverter for a Motor 11...