Baldor 22H series, Инструкция по установке и эксплуатации

Страница: 29 / 140

Section 1
General Information
3-18 Receiving & Installation MN722
“EK” suffix
Note: “EK” Controls are input phase sensitive. Be sure all connections are correct.
Caution: Do not use power factor correction capacitors at the input power
lines to the 22H Line Regen control. Installing power factor
correction capacitors may damage the control.
The AC power and motor connections are shown in Figure 3-5. Overloads are not
required. The 22H control has an electronic I
2 t motor overload protection. If motor
overloads are desired, they should be sized according to the manufacturers specifications
and installed between the motor and the T1, T2 and T3 terminals of the control.
Caution: Do not connect AC power to the Motor terminals T1, T2 and T3.
Connecting AC power to these terminals may result in damage to
the control.
Caution: Baldor recommends not using “Grounded Leg Delta” transformer
power leads that may create ground loops and degrade system
performance. Instead, we recommend using a four wire Wye.
1. Connect the incoming AC power wires from the protection devices to terminals
A1, B1 and C1 of the 3% line reactor.
2. Connect A2, B2 and C2 3% line reactor terminals to the L1, L2 and L3 of the
boost regulator.
3. Connect X1, X2 and X3 boost regulator terminals to X1, X2 and X3 of the control.
4. * Connect earth ground to the “ ” of the control. Be sure to comply with local codes.
5. Connect boost regulator terminals L1A, L2A and L3A to Filter terminals J1-1,
J1-2 and J1-3.
6. Connect filter terminals J2-1, J2-2 and J2-3 to control terminals L1A, L2A and L3A.
7. Connect the three phase power leads of the AC motor to terminals T1, T2, and
T3 of the control.
8. * Connect motor ground wire to the “ ” of the control. Be sure to comply with
all applicable codes.
* Grounding by using conduit or panel connection is not adequate. A separate
conductor of the proper size must be used as a ground conductor.
Notes (for Figure 3-5):
1. See “Protective Devices” described previously in this section.
2. Shield wires inside a metal conduit.
3. Metal conduit should be used to shield output wires (between control and motor).
Connect conduits so the use of Load Reactor or RC Device does not interrupt EMI/RFI
shielding.
4. 3% Line Reactor is required at input.
5. See Load Reactors in this section.
6. A motor circuit contactor is recommended to provide a positive disconnect and prevent
motor rotation which could pose a safety hazard. Connect the M-Contactor as shown.
The contactor should open the enable input at J1-8 at least 20 msec before the main
M-contacts open to prevent arcing at contacts. This greatly increases contactor life and
allows use of IEC rated contactors.