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Chapter 3: Wiring
Firmware – S2011 and S3012
Revision: 1 (9/98) 12 © Saftronics, Inc.
§ Installation of Surge Suppressor
For inductive loads (magnetic contactors, magnetic relays, magnetic valves, solenoids, magnetic brakes, etc.)
connected near the Inverter, use a surge suppressor simultaneously.
§ Prohibition of Installation of Phase Advancing Capacitor
If a Phase Advancing Capacitor or Surge Suppressor is connected in order to improve the power factor, it may
become overheated and damaged by Inverter high harmonic components. Also, the Inverter may malfunction
because of overcurrent.
3.2.2 Wiring Precautions for Main Circuit Output
§ Connection of Terminal Block and Load
Connect output Terminals T1, T2, and T3 (U, V, and W) to motor lead wires T1, T2, and T3 (U, V, and W). Verify
that the motor rotates in the forward direction (CCW: counterclockwise when viewed from the motor load side) with
the forward RUN command. If the motor rotation is incorrect, exchange any two of output Terminals T1, T2, and T3
(U, V, and W).
§ Strict Prohibition of Connection of Input Power Supply to Output Terminals
Never connect the input power supply to output Terminals T1, T2, and T3 (U, V, and W).
§ Strict Prohibition of Short Circuiting or Grounding of Output Circuit
Never touch the output circuit directly or put the output line in contact with the Inverter case. Otherwise, it may cause
an electrical shock or grounding. In addition, never short-circuit the output line.
§ Prohibition of Connection of Phase Advancing Capacitor or LC/RC Noise Filter
Never connect a Phase Advancing Capacitor or LC/RC noise filter to the output circuit.
§ Avoidance of Installation of Magnetic Starter
Do not connect a Magnetic Starter or MC to the output circuit. If the load is connected while the Inverter is running,
the Inverter overcurrent protective circuit operates because of inrush current.
§ Installation of Thermal Overload Relay
An electronic overload protective function is incorporated into the Inverter. However, connect a Thermal Overload
Relay when driving several motors with one Inverter or when using a multi-pole motor. When using a Thermal
Overload Relay, set Inverter constant n033 to 0 (motor overload protection selection: no protection). Additionally, for
Thermal Overload Relay at 50Hz, set the same rated current value as that described on the motor nameplate, or at
60Hz 1.1 times larger than the rated current value described on the motor nameplate.
§ Wiring Distance between Inverter and Motor
If the total wiring distance between Inverter and motor is excessively long and the Inverter carrier frequency (main
transistor switching frequency) is high, harmonic leakage current from the cable will adversely affect the Inverter and
peripheral devices.
If the wiring distance between Inverter and motor is long, reduce the Inverter carrier frequency as described below.
Carrier frequency can be set by constant n050.
Table 2 Wiring Distance between Inverter and Motor
Wiring Distance between Inverter and Motor
Up to 164ft
(50m)
Up to 328ft
(100m)
More than 328ft
(100m)
Carrier Frequency
(Set value of constant n050)
15kHz or less
(6)
10kHz or less
(4)
5kHz or less
(2)
3.2.3 Grounding
• Ground resistance
• 200 V class: 100 Ω or less, 400 V class: 10 Ω or less
• Never ground the Inverter in common with welding machines, motors, or other large-current electrical equipment.
Run all the ground wires in a conduit separate from wires for large-current electrical equipment.
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- TECHNICAL MANUAL 1
- General Precautions 3
- § Receiving 4
- § Installation 4
- § Wiring 4
- § Operation 5
- Table of Contents 7
- Receiving 9
- § Nameplate Data 10
- § Model Designation 10
- § Specification Designation 11
- Chapter 1: Receiving 12
- Installation 13
- CAUTION 14
- 2.4 Clearances 16
- FP5/GP5 17
- 3.1 Connection Diagram 18
- WARNING 19
- Chapter 3: Wiring 21
- 200V Class 23
- 400V Class 24
- FP5/GP54185 to FP5/GP54300 24
- 3.4 Wiring Inspection 30
- Operation 31
- 4.1 Operation Mode Selection 33
- 4.2 Test Run Checkpoints 34
- 4.4 Test Run 35
- Chapter 4: Operation 37
- Simple Data Setting 39
- 5.2 LED Description 40
- 34 © Saftronics, Inc 42
- Programming Features 43
- 6.2 V/f Pattern Setting 44
- 6.2.1. Preset V/f Pattern 45
- 6.3.3. Operating at Low Speed 47
- 6.3.9 Torque Detection 51
- § Speed Search Command 53
- § Coast to Stop (n004 = 1) 56
- Timer Function (Setting: 20) 60
- § Loop Test (Setting: 26) 61
- 6.6 Adjusting Motor Torque 64
- § Motor Rated Current (n032) 65
- 6.8 PID Control 66
- 6.9 Energy Saving Control 67
- 6.10 MEMOBUS Control 68
- MEMOBUS Slave Address (n106) 69
- 62 © Saftronics, Inc 70
- Maintenance and Inspection 71
- Troubleshooting 73
- Chapter 8: Troubleshooting 74
- Specifications 79
- 9.1 Standard Specifications 80
- Chapter 9: Specifications 81
- Dimensions 83
- 10.1 Dimensions 84
- Chapter 10: Dimensions 85
- Typical Connection Diagram 87
- 11.1 Braking Resistor Unit 88
- 82 © Saftronics, Inc 90
- Constant List 91
- 12.1 Constant List 92
- Chapter 12: Constant List 93
- Firmware – S2011 and S3012 100
- 94 © Saftronics, Inc 102
- REV 1 (9/98) 108
- P/N 027-2042 108
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