TOSHIBA
*Molded case
Ampacity
Inverter
circuit breaker (FLA x 1.25)
**Typical cable size (AWG)
(MCCB)
Amp
Main power
230Vac and
Frequency
Other
Type form
rating
(A)
and
460Vac control
command input,
signal
(A)
motor load
power source
frequency meter,
circuits
ammeter
P2-4600
125
106
#2
P2-4750
175
132
#1/0
P2-410HP
200
171
#2/0
P2-412HP
225
214
#4/0
P2-415HP
300
251
*** 2 (#2/0)
P2-420HP
350
330
*** 2 (#4/0)
#14
3-core shield cable
#18
(speed reference)
P2-425HP
400
416
*** 2 (#2/0)
2-core shield cable
#20
P2-430HP
600
496
*** 2 (#350)
P2-440KB
600
628
*** 2 (#350)
P2-450KB
800
785
**** 3 (#300)
P2-460KB
1000
941
**** 3 (#400)
P2-470KB
1200
1099
**** 3 (#500)
*
The Molded Case Circuit Breaker (MCCB) or Magnetic Circuit Protector (MCP) should
be coordinated with the available short circuit current. The standard units are rated for
output short circuit faults of 10,000A (60 - 200 HP), 18,000A (201 - 400 HP), 30,000A
(401 - 600 HP) and 42,000A (601 - 900 HP) according to the UL 508C "Power
Conversion Equipment", Table 58.1 or CSA Standard C22.2 No.14-M1987 "Industrial
Control Equipment" Table 24. The selection of breakers for this table is in accordance
with 1990 NEC Article 430. The selection of these breakers takes into consideration
motor starting at the low end of the output voltage specifications but does not consider
the use of high efficiency motors.
*
For multiple motor applications, the magnetic only MCP should be replaced by a thermal
magnetic MCCB. The MCCB should be sized according to 1.25 X (largest motor Full
Load Amps) + (sum of all other motor Full Load Amps) to meet National Electric Code
(NEC) or Canadian Electrical Code (CEC) requirements. An individual overload relay
must be provided for each motor in multiple motor applications.
**
Wire sizing is based upon NEC table 310-16 or CEC Table 2 using 75° C cable, an
ambient of 30° C, cable runs for less than 500 FT., and copper wiring for not more than
three conductors in raceway or conduit or earth (directly buried)(except as noted above).
The customer should consult the NEC or CEC wire Tables for his own particular
application and wire sizing.
4.0
Wiring
4.1
Selection of Main Circuit Wiring Equipment and
Standard Cable Sizes
4 - 1
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