Electric load restriction unit

An electrical mechanism for reducing the secondary load of an overloaded primary electrical power supply comprising:

• a primary electrical power supply circuit connected to a source of alternating current, the frequency of which is reduced when the said primary circuit is overloaded,
• a plurality of secondary electrical circuits each connected to the primary circuit by an individual circuit breaker,
• a solenoid fitted with a contact arm actuated by an electrical coil, and fitted with a contact engaged by the contact arm only when the coil is energized,
• electrical switching means responsive to electrical line frequency, which energizes the solenoid coil when the connected line frequency falls below a pre-selected valve,
• said contact being individually electrically connected to the load side of an individual secondary load circuit, and
• said contact arm connected to an electrical ground connection, such that
• energization of the solenoid coil by the frequency responsive switching means causes an initial increase in the secondary load circuit connected to the contact to cause the circuit breaker of said secondary circuit to open and interrupt all current flow to the said secondary circuit, so as to reduce the load of the primary electrical power supply circuit.