124 



Experimental Switchboards and Experimental Resistances. 



50507. 1:12. 



50 508. 1 : 8. 



I 



> 







Q 



Experimental Switchboards for two kinds of Current. 



s. (I. 



50.505. Experimental Switchboard (Wall Pattern), with 1 Circuit, arranged for Direct and 

 Alternating Current, for connecting up to 120 volts working pressure and for taking 

 currents up to 30 amperes 29.0.0 



The switchboard contains: 1 36-ohm Rheostat, variable in 30 stages and for a max. load of 

 5 30 amps.; 1 Double Switch Lever with 30 contacts; 2 fuses; 1 main switch (quick break); 1 hot- 

 wire ammeter with 2 ranges ; 1 ammeter switch ; 1 hot-wire voltmeter with 2 ranges ; 1 voltmeter switch ; 

 1 switch for the shunt; 1 switch for connecting the board to a direct or alternating current supply 

 at will; 1 plug box with plug and 4 m flexible; 4 terminals for connecting to the supply circuit. 



50.506. - The preceding, for working pressures to 220 volts with a current of 20 amps. 32. 0. 



cr 

 



5 

 g_ 



e-^ 

 JSI 



O 



$ 



3 







3 

 v; 



50,507. Travelling Type Experimental Switchboard, with 1 Circuit, arranged for Direct and 

 Alternating Current, Figure, for connecting to working pressures of up to 230 volts, 

 and for taking currents of up to 30 amperes from the network 40. o. 



The switchboard contains: 1 36-ohm Rheostat, variable in 30 stages and for a max. load of 

 30 amps.; 1 Double Switch Lever with 30 contacts; 2 fuses; 1 2-pole main switch; 1 hot-wire volt- 

 meter for direct and alternating current with 2 ranges 130 and 260 volts; 1 hot-wire ammeter 

 for direct and alternating current with two ranges 0.5 5 and 5 50 amps.; 1 voltmeter switch; 

 1 switch for the shunt; 1 plug box with plug and 4 m flexible. 



When the switchboard is used for direct and alternating current two plug boxes should be fitted 

 at each point of connection Each 0. 



1. 6 



50,508. Experimental Switchboard (Wall Pattern), for Alternating or Triphase Current, with 

 1 triphase Circuit, Figure, for connecting up to a working pressure of 110 volts, 

 and for taking currents of 4 -10 amps, from the network 24. 0. o 



The switchboard contains: 1 Rheostat of 3 x 15 ohms, variable in 12 stages, for a max. load of 

 10 amps.; 1 3-pole switch; 3 fuses; 1 ammeter and 1 voltmeter, air-damped, of 120 mm scale-diameter; 



1 voltmeter switch; 2 plug boxes with plugs, for alternating or 3-phase current and 4 m flexible; 



2 terminals for the A. C. supply main and 3 terminals for the 3-phase supply. 



Cl. 3221, 3222 



