Miller Bobcat 225 Owner's Manual page 60

11-8. Power Required To Start Motor
Motor Start G
Code
KVA/HP 6.3
11-9. How Much Power Can Generator Supply?
OM-286503 Page 56
4
AC MOTOR
1
VOLTS 230 AMPS
3
CODE M Hz
HP 1/4 PHASE
Single-Phase Induction Motor Starting Requirements
H J
7.1 8.0
1
2
1 Motor Start Code
2 Running Amperage
3 Motor HP
4 Motor Voltage
2
2.5
Step 1: Find code and use table to find kVA/
60
HP. If code is not listed, multiply running am-
1 perage by six to find starting amperage.
Step 2: Find Motor HP and Volts.
Step 3: Determine starting amperage (see
example).
Welder/generator amperage output must be
at least twice the motor's running amperage.
(kVA/HP x HP x 1000) / Volts = Starting
Amperage
Example: Calculate starting amperage re-
quired for a 230 V, 1/4 HP motor with a motor
start code of M.
Volts = 230, HP = 1/4, kVA/HP = 11.2
(11.2 x 1/4 x 1000) / 230 = 12.2A
Starting the motor requires 12.2 amperes.
K L
9.0 10.0 11.2
1 Limit Load To 90% Of Generator Output
Always start non-resistive (motor) loads in
order from largest to smallest, and add resis-
tive loads last.
2 5 Second Rule
If motor does not start within 5 seconds, turn
off power to prevent motor damage. Motor
requires more power than generator can
supply.
M N
12.5 14.0
P