Mitsubishi Electric FR-E540 Instruction Manual Page 47
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INSTALLATION AND WIRING
36
(
2
)
Line-to-line leakage currents
Harmonics of leakage currents flowing in static capacities between the inverter output cables might operate
the external thermal relay unnecessarily. When the wiring length is long (50m (164.04feet) or more) for the
400V class small-capacity model (7.5kW (10HP) or less), the external thermal relay is likely to operate
unnecessarily because the ratio of the leakage current to the rated motor current increases.
•
••
•
Line-to-Line Leakage Current Data Example (200V class)
Leakage Current (mA)
Motor Capacity
(kW (HP))
Rated Motor
Current (A)
Wiring length 50m
(164.04feet)
Wiring length 100m
(328.08feet)
0.4 (1/2) 1.8 310 500
0.75 (1) 3.2 340 530
1.5 (2) 5.8 370 560
2.2 (3) 8.1 400 590
3.7 (5) 12.8 440 630
5.5 (7.5) 19.4 490 680
7.5 (10) 25.6 535 725
Motor: SF-JR 4P
Carrier frequency: 14.5kHz
Cable used: 2mm
2
4-core
cable
*The leakage current of the 400V class will be approximately twice that of the 200V class.
IM
NFB
Line-to-Line Leakage Current Path
Power
supply
Inverter
Thermal relay
Line static capacitances
Motor
#
##
#
Countermeasures
•
Use the electronic overcurrent protection (Pr. 9) of the inverter.
•
Decrease the carrier frequency. Note that motor noise increases. Selection of Soft-PWM (Pr. 240) will
make it unoffending.
To ensure that the motor is protected against line-to-line leakage currents, it is recommended to use a
temperature sensor to directly detect motor temperature.
2.3.5 Inverter-driven 400V class motor
In the PWM type inverter, a surge voltage attributable to wiring constants is generated at the motor terminals.
Especially for a 400V class motor, the surge voltage may deteriorate the insulation. When the 400V class
motor is driven by the inverter, consider the following measures:
•
••
•
Measures
It is recommended to take either of the following measures:
(1) Rectifying the motor insulation
For the 400V class motor, use an insulation-rectified motor. Specifically,
1) Specify the “400V class inverter-driven, insulation-rectified motor”.
2) For the dedicated motor such as the constant-torque motor and low-vibration motor, use the “inverter-
driven, dedicated motor”.
(2) Suppressing the surge voltage on the inverter side
On the secondary side of the inverter, connect the optional surge voltage suppression filter (FR-ASF-H).
2
- FR-F520-0.75K to 55K 1
- FR-F540-0.75K to 55K(-EC) 1
- FR-F520-11K to 55K-NA 1
- FR-F540-11K to 55K-NA 1
- SAFETY INSTRUCTIONS 3
- 1. Electric Shock Prevention 3
- 2. Fire Prevention 3
- 3. Injury Prevention 3
- 4. Additional instructions 4
- (2) Wiring 4
- (3) Trial run 4
- (4) Operation 4
- (5) Emergency stop 5
- (7) Disposing of the inverter 5
- (8) General instructions 5
- CONTENTS 6
- Contents 6
- 6 SPECIFICATIONS 184 9
- 7 OPTIONS 192 9
- APPENDICES 195 9
- CHAPTER 1 10
- 1.1 Pre-Operation Information 11
- 1.2 Basic Configuration 12
- 1.3 Structure 13
- Front cover 14
- Inverter 14
- INSTALLATION AND WIRING 17
- 2.1 Installation 18
- 2.2 Wiring 20
- Notes on Grounding 24
- EC version 30
- NA and Japanese version 30
- Twin contact 38
- Low-level signal contacts 38
- 2.3 Other wiring 39
- 2.3.6 Peripheral devices 48
- 2.3.9 Earthing (EC version) 53
- CHAPTER 3 54
- OPERATION/CONTROL 54
- 3.1 Pre-Operation Information 55
- 3.1.2 Power on 57
- 3.2 Operation Panel 58
- 3.2.3 Monitoring 59
- 3.2.4 Frequency setting 59
- 3.2.6 Operation mode 61
- 3.2.7 Help mode 61
- 3.2.8 Copy mode 63
- 3.3.1 Parameter checking 64
- Simple mode parameter 65
- 3.3.2 Main parameter settings 66
- 3.4 Operation 68
- CONTROL PANEL 69
- 3.4.3 PU operation mode 70
- 3.4.4 Combined operation mode 71
- CHAPTER 4 72
- PARAMETERS 72
- 4 PARAMETERS 73
- 4.1 Parameter List 73
- Output frequency (Hz) 81
- Output voltage 81
- (Pr. 52 to Pr. 54, Pr. 158) 99
- With alarm 100
- PARAMETERS 101
- 4.2.29 Applied motor (Pr. 71) 110
- 4.2.31 Voltage input (Pr. 73) 112
- (Pr. 75) 113
- Time (Minute) 131
- Minute (Second) 131
- (Pr. 135 to Pr. 139) 140
- Set time (s) 149
- Overload status (OL output) 149
- OL output signal 149
- (Pr. 170, Pr. 171) 151
- Pr. 516 Pr. 504 163
- Pr. 502 + Pr. 503 163
- (Pr. 902 to Pr. 905) 170
- MON EXT PU 172
- PROTECTIVE FUNCTIONS 176
- 5 PROTECTIVE FUNCTIONS 177
- 5.1 Errors (Alarms) 177
- (2) Minor fault 184
- (3) Warnings 184
- 5.1.4 Alarm code output 187
- 5.1.5 Resetting the inverter 187
- 5.2 Troubleshooting 188
- 5.3.2 Check items 190
- 5.3.3 Periodic inspection 190
- 5.3.5 Pressure test 191
- <Preparation> 193
- <Checking method> 193
- Fan cover 194
- Fan connectors 194
- <Example: FR-F540-5.5K> 194
- 5.3.8 Inverter replacement 195
- CHAPTER 6 198
- SPECIFICATIONS 198
- 6 SPECIFICATIONS 199
- 6.1 Standard Specifications 199
- 6.1.2 Common specifications 201
- 95 (3.74) 203
- CHAPTER 7 207
- 7 OPTIONS 208
- 7.1 Option List 208
- • Inboard options 210
- APPENDICES 211
- Appendix 1 Data Code List 212
- REVISIONS 217
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