YASKAWA CPCR-MR08C Bulletin page 36

3 5 1 Noise Treatment (Fig 3 20) (Cont'd) 3 5 2 Power Line Protection
(2) Grounding Method Servopack CPCR-MR08C to-MR99C are the line
operation type using the commercial power line.
• Motor frame grounding To protect the power line from grounding or contact
accidents or the system from a fire, it is necessary
When the motor is at the machine side and
to use molded-case circuit breakers (MCCB) or
dv
grounded through the frame, Cf _ current fuses depending on the number of Servopacks to
be used (Table 3.6).
flows from the PWM power through the floating
capacity of the motor. To prevent this effect The fuses contained in Servopack are to protect
of current, the motor frame is directly grounded, the DC circuit, but not to protect the power line.
• Servopack SG 0 V Quick-melting fuses cannot be used. Servopack
CPCR-MR[_-]C has the capacity-input type power
Noise may remain in the input signal line, so and so quick-melting fuses may be blown at the
make sure to ground SG 0 V (terminal (_). time of power input.
The terminals (_ , (_) , and (j_)are connected
to nowhere into Servopack. These terminals
must be grounded outside. When motor wiring Table 3 6 Power Capacity and MCCB or Fuse
is contained in metal conduits, the conduits and
boxes must be grounded. SERVOPACK Power Capacity Current Capacity per
Type CPCR- per SERVOPACK MCCB or Fuse
The above grounding uses one-point ground-
ing. For wiring,see Par. 4.2.2. MR 08C 16kVA 5A
MR15C 3.0kVA 9A
(3) Grounding when Multiple Servopacks are used
MR22C 40 kVA 12A
When Servoapck types CPCR-MR[7 C are housed
in the same control panel, ground them as shown 37 kW 69 kVA 20 A
inFig. 3.21. MR 55C
5.hkW 9kVA 26A
6kW 10kVA 26A
FSERVOPACK 2OR11_ 75kW 13kVA 35A
MR75C
CPCR-MR[TC i., I
E(E1_" MR 99C 99kW 17kVA 50A
_ ONE POINT
2 OR11 _ GROUNDING
SERVOPACK , X/IN PANEL
CPCR-MR[]C E (E1)_"
y q
3 5 3 Driving Motor with Cooling Fan and Motor
SERVOPACK 2 OR 11_K_ / __ GROUNDING
with Separate Excitation
CPCR-MR[]C E (EI)_" • The cooling fan comes attached to Cup motor
/
type UGCMFM-75FB, Hi-Cup motor type UGHMFM-
Fig 3. 21 Grounding when Multiple 60, industrial DC motor type GEELM-K, and
SERVOPACKs are used
Minertia motor type UGMMKR-2AA, respectively.
For the cooling fan specifications (power require-
ment, number of phases, thermal overload relay
(4) Others type forprotection, connectionmethod, and air
flow), see the individual motor specifications and
• For an effective action due to R. F. I., use make correct connection.
three-phase insulation transformer for the power
supply (for types CPCR-MR08C to -MR99C). Make the sequence so that the motor-drive
main circuit is cut off when the fan-protecting
• For preventing noise from the speed reference thermal overload relay operates.
circuit, use an isolator.
Minertia motor type UGMMKR-2AA requires a
Example: V/V Isolator M3000B Type made by field power supply in addition to Servopack.
M. T. T. Co. Our company offers the fieldpower unit NPSA-
TM-20(RH)YI for type UGMMKR-2AA. For
details, contact your Yaskawa representative.
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