Wiring Diagram Book - Schneider Electric

More documents

Recommendations

Info

Examples of Control Circuits 2- and 3-Wire Control Elementary <strong>Diagram</strong>s 6 Low Voltage Release and Low Voltage Protection are the basic control circuits encountered in motor control applications. The simplest schemes are shown below. Other variations shown in this section may appear more complicated, but can always be resolved into these two basic schemes. Note: The control circuits shown in this section may not include overcurrent protective devices required by applicable electrical codes. See page 11 for examples of control circuit overcurrent protective devices and their use. Low Voltage Release: 2-Wire Control FIG. 1 L1 L2 FIG. 2 1 3 Low voltage release is a 2-wire control scheme using a maintained contact pilot device in series with the starter coil. This scheme is used when a starter is required to function automatically without the attention of an operator. If a power failure occurs while the contacts of the pilot device are closed, the starter will drop out. When power is restored, the starter will automatically pickup through the closed contacts of the pilot device. The term “2-wire” control is derived from the fact that in the basic circuit, only two wires are required to connect the pilot device to the starter. 2-Wire Control: Maintained Contact Hand-OFF-Auto Selector Switch A Hand-Off-Auto selector switch is used on 2-wire control applications where it is desirable to operate the starter manually as well as automatically. The starter coil is manually energized when the switch is turned to the Hand position and is automatically energized by the pilot device when the switch is in the Auto position. M PILOT DEVICE SUCH AS LIMIT SWITCH, PRESSURE SWITCH, ETC. FIG. 3 L1 L2 FIG. 4 A1 I A2 I HAND OFF AUTO A1 3A M OL 1A 2A A2 2-WIRE CONTROL DEVICE Low Voltage Protection: 3-Wire Control L1 L2 OL START M 1 STOP 2 3 M Low voltage protection is a 3-wire control scheme using momentary contact push buttons or similar pilot devices to energize the starter coil. This scheme is designed to prevent the unexpected starting of motors, which could result in injury to machine operators or damage to the driven machinery. The starter is energized by pressing the Start button. An auxiliary holding circuit contact on the starter forms a parallel circuit around the Start button contacts, holding the starter in after the button is released. If a power failure occurs, the starter will drop out and will open the holding circuit contact. When power is restored, the Start button must be operated again before the motor will restart. The term “3-wire” control is derived from the fact that in the basic circuit, at least three wires are required to connect the pilot devices to the starter. 3-Wire Control: Momentary Contact Multiple Push Button Station When a motor must be started and stopped from more than one location, any number of Start and Stop push buttons may be wired together. It is also possible to use only one Start-Stop station and have several Stop buttons at different locations to serve as an emergency stop. OL L1 START L2 1 STOP STOP STOP START 2 START M 3 M OL
3-Wire Control: Pilot Light Indicates when Motor is Running FIG. 1 FIG. 2 L1 L2 1 A pilot light can be wired in parallel with the starter coil to indicate when the starter is energized, indicating the motor is running. 3-Wire Control: Push-to-Test Pilot Light Indicates when Motor is Running FIG. 3 L1 L2 FIG. 4 1 STOP 2 START 3 When the Motor Running pilot light is not lit, there may be doubt as to whether the circuit is open or whether the pilot light bulb is burned out. To test the bulb, push the color cap of the Pushto-Test pilot light. 3-Wire Control: Fused Control Circuit Transformer FIG. 5 L1 L2 FIG. 6 FU1 FU2 STOP STOP 2 As an operator safety precaution, a step-down transformer can be used to provide a control circuit voltage lower than line voltage. The diagram above shows one way to provide overcurrent protection for control circuits. M START 3 START M M TEST M R M M OL OL R OL GROUND (If used) 3-Wire Control: Pilot Light Indicates when Motor is Stopped L1 L2 1 STOP M 2 START 3 M A pilot light may be required to indicate when the motor is stopped. This can be implemented by wiring a normally-closed auxiliary contact on the starter in series with the pilot light, as shown above. When the starter is deenergized, the pilot light illuminates. When the starter picks up, the auxiliary contact opens, turning off the light. 3-Wire Control: Illuminated Push Button Indicates when Motor is Running The illuminated push button combines a Start button and pilot light in one unit. Pressing the pilot light lens operates the Start contacts. Space is saved by using a two-unit push button station instead of three. 3-Wire Control: Fused Control Circuit Transformer and Control Relay L1 A starter coil with a high VA rating may require a control transformer of considerable size. A control relay and a transformer with a low VA rating can be connected so the normally-open relay contact controls the starter coil on the primary or line side. Square D Size 5 Combination Starter Form F4T starters use this scheme. M OL L1 L2 1 STOP 2 START* 3 M OL STOP Examples of Control Circuits 3-Wire Control Elementary <strong>Diagram</strong>s M R * * Pushing on pilot light operates Start contacts. CR START M M CR G OL GROUND (If used) L2 7
Page 1 and 2: F U 3 F U 1 L1 L2 460 V F U 2 L3 H1
Page 3 and 4: Standard Elementary Diagram Symbols
Page 9: Terminology A wiring diagram shows,
Page 13 and 14: 3-Wire Control: Reversing Starter M
Page 15 and 16: 3-Wire Control: Fusing in 1 Line On
Page 17 and 18: ® AC Manual Starters and Manual Mo
Page 19 and 20: Drum Switches: Class 2601 FIG. 1 HA
Page 21 and 22: ® FIG. 1 FIG. 2 Reversing DC Start
Page 23 and 24: FIG. 1 ® Full-Voltage Squirrel Cag
Page 25 and 26: FIG. 1 ® Medium Voltage Motor Cont
Page 27 and 28: FIG. 1 ® Medium Voltage Motor Cont
Page 29 and 30: FIG. 1 ® Full-Voltage, Non-Reversi
Page 31 and 32: ® FIG. 1 FIG. 2 Load Detector Rela
Page 33 and 34: FIG. 1 FIG. 2 ® 10 A Control Relay
Page 35 and 36: ® Control Relays: CA2 and CA3 FIG.
Page 37 and 38: ® Power Terminals Coil Terminals F
Page 39 and 40: FIG. 4 FIG. 1 FPO 31-2 120% ® Type
Page 41 and 42: FIG. 1 ® Size 6, 3-Pole Contactor
Page 43 and 44: FIG. 1 ® Size 7, 3-Pole Contactor
Page 45 and 46: ® 3- and 4-Pole Contactors: LC1 an
Page 47 and 48: FIG. 1 FIG. 2 FIG. 3 ® 1-Pole, 1-P
Page 49 and 50: FIG. 1 ® 3-Pole, 3-Phase Magnetic
Page 51 and 52: FIG. 1 FIG. 2 FIG. 3 ® 3-Pole, 3-P
Page 53 and 54: FIG. 1 ® 3-Pole, 3-Phase Magnetic
Page 55 and 56: FIG. 1 LD1 Off A1 A2 ® 1 L1 Contac
Page 57 and 58: FIG. 1 LD4 A1 A2 1 3 5 L1 L2 L3 T1
Page 59 and 60: ® Integral 18 FIG. 1 1 3 5 FIG. 2
Page 61 and 62:
FIG. 1 FIG. 2 FIG. 3 LA1 - LB034 LA
Page 63 and 64:
FIG. 1 FIG. 2 START STOP ® Type S
Page 65 and 66:
FIG. 1 ® L1 L2 L3 Reduced Voltage
Page 67 and 68:
® FIG. 1 FIG. 2 Wye-Delta Type Red
Page 69 and 70:
® 3-Phase Primary-Resistor Reduced
Page 71 and 72:
® FIG. 1 FIG. 2 L1 L2 L3 L1 L2 L3
Page 73 and 74:
® Solid State Reduced Voltage Cont
Page 75 and 76:
FIG. 1 FIG. 2 FIG. 3 ® Reversing S
Page 77 and 78:
FIG. 1 FIG. 2 FIG. 3 ® Starters fo
Page 79 and 80:
® Form R1 Form R2 FIG. 1 FIG. 2 FP
Page 81 and 82:
® Multispeed Motor Connections: 3-
Page 83 and 84:
® Load Connections for AC Lighting
Page 85 and 86:
FIG. 5 ® AC Lighting Contactors an
Page 87 and 88:
FIG. 1 FIG. 3 FIG. 5 FIG. 6 FIG. 7
Page 89 and 90:
XS Tubular Inductive Proximity NAMU
Page 91 and 92:
® Photoelectric Sensors XUM, XUH,
Page 93 and 94:
® XUV Photoelectric Sensors w/ Sep
Page 95 and 96:
FIG. 1 FIG. 2 FIG. 3 ® Limit Switc
Page 97 and 98:
® Pressure and Temperature Switche
Page 99 and 100:
® Pneumatic Timing Relays: Class 9
Page 101 and 102:
FIG. 1 FIG. 2 3 2 ® Solid State In
Page 103 and 104:
Table 6 Enclosures for Non-Hazardou
Page 105 and 106:
® Conductor Ampacity and Conduit T
Page 107 and 108:
Table 13 Electrical formulas for Am
Page 109:
From single products to complete sy
show all

Wiring Diagram Book - Schneider Electric

Create successful ePaper yourself

Delete template?

Save as template?