Output Test Bank Switch(es), S11 & S13
A spst, toggle switch provides a means of bypassing the plug interlock relay when supplying
power to a load bank or to an aircraft not equipped with 28 VDC feed back. GPU-4090
models have (1) switch as standard and a 2nd is included with the optional 2nd 400 Hz output
cable. All other GPU-4000 models have (2) test bank switches as standard.
(5)