No. 50502. 



Direct Current Experimental Switchboards with two Circuits for Equal Currents. 



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50 500. 1 : 10. 



50 502. 1 : 10. 



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50,500. Experimental Switchboard with 2 Circuits, Type F 2 , Wall Pattern (Figure), for 

 connecting up to 110 volts Direct Current, for taking currents of 0.04 20 amps, and 

 pressures of 0.4 110 volts in each of the two circuits, with air-damped measuring in- 

 struments of 120 mm scale-diameter and two Double Switch Contact Eheostats with 

 21 steps ................................... 26. 0.0- 



The switchboard contains in each circuit: 2 fuses; 1 main switch; 1 ammeter; 1 switch for the 

 shunt for obtaining division of potential; 1 24-ohm Rheostat variable in 21 stages and for 5 20 amps. 

 max. load; 1 Double Switch Lever with 21 contacts; 1 plug box with plug and 4 m flexible; 2 terminals 

 for connecting the board to the network. In addition there are for the two circuits in common: 1 volt- 

 meter and 1 voltmeter switch for 4 circuits. 



50,501. Travelling Type Experimental Switchboard with 2 Circuits, Type F s (cf. F i g. 50.472), 

 resting on stout castors; apparatus and instruments exactly as in No. 50,500. . . . 



28.10.0- 



Direct Current Experimental Switchboards with 2 Circuits of different Current- density, 



with Standard Type Instruments. 



50.50:.'. Experimental Switchboard, Type Gi, Wall Pattern (Figure), with 2 circuits for 

 currents of different strength, for connecting up to 110 160 volts Direct Current. 1 and 

 for taking currents of 0.03 30 amps, and pressures of 0.03 110 (or 160) volts from 

 one circuit, and currents of 0.01 5 amps, and pressures of 0.3 110 (or 160) volts from 

 the other circuit, with Standard Instruments and two Double Switch Contacts with 

 30 and 21 stages respectively 36. 0. 



In ordering, please state pressure of network. If this is not given, the voltmeter is supplied for 



125 volts. 



Weight, net, about 120 kg; gross, about 175 kg. Packing for land transport 1. 2. 



The switchboard contains for the 30 ampere circuit: 2 fuses: 1 main switch; 1 dead-beat standard 

 ammeter: 1 switch for the shunt for obtaining division of potential; 1 36-ohm Rheostat variable in 



Cl. 4739, 5330. 



