The difference between 15A and 15B is that. 15B is with aviation potentiometer material.
Universal 15 Amp 1/2 wave self excitedDip-SwitchProgmmable avr
Voltage regulation Less than ± 1%;220 / 440VAC programmable input
Rugged compact design;Starting tension mechanized on ramp;With protection under frequency roll
EMI Suppression;15Amp high capacity integrated fuse

Voltage: 220 / 400VAC 1 Phase 2 of
Power input voltage: 180-240VAC 1 Phase 2 of
Output voltage: Max 90 at 240VAC input
Current: Continuous 6A, intermittent 12A for 10 secs
Resistance: Min.10 ohm, maximum 100ohm
Build voltage-: Residual voltage in terminal avr more than the 5VAC
Voltage regulation: Less than ± 0. 5% with 4% engine
Operating temperature: - 40 Celsius to + 65 Celsius
Storage Temperature: - 40 Celsius to + 85 Celsius
External volts Adjutment: ± 7% with 1k ohm 1 watt trimmer
EMI suppression: Internal electromagnetic filtering interference
Power dissipation unit: Max. 8 watt
Often protection: 60Hz system preset knee point to 57Hz / 50Hz system preset knee point to 47Hz
Colour:Black
Material:plastic

Package Contents:
2 * Generator accessories