Section 1
General Information

3-8 Receiving & Installation MN722

Protection Devices Be sure a suitable input power protection device is installed. Use the recommended

circuit breaker or fuses listed in Table 3-5 and 3-6. Input and output wire size is based on

the use of copper conductor wire rated at 75 °C. The table is specified for NEMA B

motors.

Circuit Breaker: 3 phase, thermal magnetic.
Equal to GE type THQ or TEB for 230 VAC or
GE type TED for 460 VAC
Fast Action Fuses: 230 VAC, Buss KTN
460 VAC, Buss KTS to 600A (KTU 601 - 1200A)
Very Fast Action: 230 VAC, Buss JJN
460 VAC, Buss JJS
Time Delay Fuses: 230 VAC, Buss FRN
460 VAC, Buss FRS to 600A (KLU 601 - 1200A)
Power Disconnect

A power disconnect should be installed between the input power service and the control

for a fail safe method to disconnect power. The control will remain in a powered-up

condition until all input power is removed from the control and the internal bus voltage is

depleted.

Internal Fuses

Table 3-4 Internal Fuses
Control
Size
Zero Crossing
(Input Interface
Board)
Filter Fuses
(Filter Board) Control
Transformer Soft Start
Transformer Fan Control
Transformer
Size Rating Type Rating Type Rating Type Rating Type Rating Type
C+ 3/10 A
500VAC
FLQ-
3/10 or
Equiv.
5A
500VAC FNQ-5 or
Equiv. 3.2A
250VAC
MDA-
3 2/10 or
Equiv.
D+ 3/10 A
500VAC
FLQ-
3/10 or
Equiv.
5A
500VAC FNQ-5 or
Equiv. 3.2A
250VAC
MDA-
3 2/10 or
Equiv.
D3/10 A
500VAC
FLQ-
3/10 or
Equiv.
10A
600VAC KTK-10
or Equiv. 3.2A
250VAC
MDA-
3 2/10 or
Equiv.
E3/10 A
500VAC
FLQ-
3/10 or
Equiv.
10A
600VAC KTK-10
or Equiv. 3.2A
250VAC
MDA-
3 2/10 or
Equiv.
1/2 A
250VAC ABC 1/2
or Equiv.
F3A
600VAC ATM-3
or Equiv. 3A
500VAC KTK-3 or
Equiv. 3A
600VAC KTK-3 or
Equiv. 3A
600VAC KTK-3 or
Equiv.
G+ 250HP 50A
600VAC JJS or
Equiv. 31/2 A
500VAC
FNQ-
31/2 or
Equiv.
4A
500VAC FNQ-4 or
Equiv. 3A
500VAC FNQ-3 or
Equiv.
G+300HP 50A
600VAC JJS or
Equiv. 31/2 A
500VAC
FNQ-
31/2 or
Equiv.
4A
500VAC FNQ-4 or
Equiv. 3A
500VAC FNQ-3 or
Equiv.
G+350HP 60A
600VAC JJS or
Equiv. 31/2 A
500VAC
FNQ-
31/2 or
Equiv.
4A
500VAC FNQ-4 or
Equiv. 3A
500VAC FNQ-3 or
Equiv.
G+400HP 70A
600VAC JJS or
Equiv. 31/2 A
500VAC
FNQ-
31/2 or
Equiv.
4A
500VAC FNQ-4 or
Equiv. 3A
500VAC FNQ-3 or
Equiv.
G+450HP 70A
600VAC JJS or
Equiv. 31/2 A
500VAC
FNQ-
31/2 or
Equiv.
4A
500VAC FNQ-4 or
Equiv. 3A
500VAC FNQ-3 or
Equiv.

Not applicable.