System to monitor a switchgear having a main bus, a plurality of feeder circuits (42a, 42b, 42c, 42d) and an input circuit, characterized in that the system comprises: a plurality of nodes (N1, N2, N3), wherein one is an electrical connection point between said main bus and said input circuit and the other ones (N2, N3) are electrical connection points between said main bus and said plurality of feeder circuits; a plurality of temperature sensors, each associated with a respective one of said plurality of nodes and coupled to the main bus at the respective one of said plurality of nodes, configured to measure the temperature of the respective one of said plurality of nodes; an input current sensor positioned to measure the current supplied to said main bus by said input circuit; a plurality of output current sensors, each positioned in a respective one of said plurality of feeder circuits, configured to measure the current (i2, i3, i5, i6) flowing through said plurality of feeder circuits; a processor configured to: receive an electrical configuration that defines the relative locations and electrical connections between said main bus, said feeder circuits, said input circuits and said plurality of nodes; determine the current flow through one of said plurality of nodes by subtracting the measured current flow (i2, i3) through each said feeder circuit upstream from said node from the measured current supplied by said input circuit; determine, from said determined current flow through one of said plurality of nodes, an expected temperature tolerance range at said node; determine an alarm condition if the measured temperature at said node as measured by said associated temperature sensor is outside said expected temperature tolerance range at said node. a plurality of nodes (N1, N2, N3), wherein one is an electrical connection point between said main bus and said input circuit and the other ones (N2, N3) are electrical connection points between said main bus and said plurality of feeder circuits; a plurality of temperature sensors, each associated with a respective one of said plurality of nodes and coupled to the main bus at the respective one of said plurality of nodes, configured to measure the temperature of the respective one of said plurality of nodes; an input current sensor positioned to measure the current supplied to said main bus by said input circuit; a plurality of output current sensors, each positioned in a respective one of said plurality of feeder circuits, configured to measure the current (i2, i3, i5, i6) flowing through said plurality of feeder circuits; a processor configured to: receive an electrical configuration that defines the relative locations and electrical connections between said main bus, said feeder circuits, said input circuits and said plurality of nodes; determine the current flow through one of said plurality of nodes by subtracting the measured current flow (i2, i3) through each said feeder circuit upstream from said node from the measured current supplied by said input circuit; determine, from said determined current flow through one of said plurality of nodes, an expected temperature tolerance range at said node; determine an alarm condition if the measured temperature at said node as measured by said associated temperature sensor is outside said expected temperature tolerance range at said node. receive an electrical configuration that defines the relative locations and electrical connections between said main bus, said feeder circuits, said input circuits and said plurality of nodes; determine the current flow through one of said plurality of nodes by subtracting the measured current flow (i2, i3) through each said feeder circuit upstream from said node from the measured current supplied by said input circuit; determine, from said determined current flow through one of said plurality of nodes, an expected temperature tolerance range at said node; determine an alarm condition if the measured temperature at said node as measured by said associated temperature sensor is outside said expected temperature tolerance range at said node.