Product/Service

Secondary Unit Substations

Source: Circuit Breaker Sales Co.
Our vast knowledge of switchgear combined with our transformer capabilities allows us to provide secondary unit subs
Circuit Breaker Sales Co.owledge of switchgear combined with our transformer capabilities allows us to provide secondary unit subs.

We can provide a completely tested system from incoming primary switch, to the transformer, down to the low voltage gear.

Our typical secondary sub is:

  • Primary - 2400 volts to 34,500 volts fused load break switch
    GE, Westinghouse-Cutler-Hammer-Siemens
  • Transformer - oil or dry, 34,500 volt primary down to a secondary of either 4160 volts or 480 volts
  • Secondary - 4160, 2400 or 480 V switchgear

Low Voltage
ANSI Metal Enclosed, Group Mounted, Individually Mounted
GE, Westinghouse-Cutler-Hammer, Siemens, ABB, Square D
Category Item Low Range High Range
Primary Switch Type Fused Load Breaker Vacuum Gear
. . Single Switch Duplex-Key Locked Switch
Transformer Insulation Dry Type Oil Filled
. Rating 500kVA 10MVA
LV Switchgear Type Switchboard Switchgear
. Voltage 208 Volts 600 Volts
. Current 400 Amps 5000 Amps
. Interrupting Capacity 22 kAIC 200 kAIC
. Trip Ratings Long Time, Instantaneous (LI) Long Time, Short Time, Instantaneous and Ground Fault (LSIG)
. Auxiliaries 1 no/1 nc 4 no/4 nc
. Shunt Trips (list voltage) All ranges All ranges
. Undervoltages (list voltage) All ranges All ranges
. Fuses (limiters) 800 Amps 4000 Amps
. Bus Systems 800 Amps 6000 Amps
. Drawout Systems Fixed mounted Drawout mounted
. Housing Indoor Outdoor


Let us provide you with a budgetary price on your electrical needs.
Simply indicate your voltage, current, testing standard, if any (ANSI, UL, etc), breaker versus fuse preference and we will respond with one or more options if applicable.

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