Page 519 - Handbook of Electrical Engineering

510 HANDBOOK OF ELECTRICAL ENGINEERING

I
I Current in amperes.
IAC or Iac Alternating current.
IALA International Association of Lighthouse Authorities.
ICI Imperial Chemical Industries plc (UK).
IDC or Idc Direct current.
IDMT Inverse definite minimum time.
IEC International Electrotechnical Commission.
IEE The Institution of Electrical Engineers of UK.
IEEE The Institute of Electronic and Electrical Engineers of USA.
I/O Input or output signals or quantity.
IMO International Maritime Organisation.
IMCS Integrated motor control system.
IMS Information management system.
inst. Instantaneous quantity.
int. Intermittent quantity.
IP Institute of Petroleum (UK) and its publications.
IP Ingress protection code, see IEC60529.
IR Insulation resistance.
IS Intrinsically safe signal, circuit or equipment.
Is/In or IS/IN Ratio of starting current to running current.
ISO International Standards Organisation.

J

J Energy in joules or newton-metres.
2
J Current density, amps/mm .
K

kA Kilo-amperes.
KEMA Short circuit testing authority in The Netherlands.
kg Kilogram.
km Length in kilometres.
kpm Kilometres per hour.
kV or Ku Kilo-volts.
kVA Kilo-volt-amperes.
kVAr Reactive kilo-volt-amperes.
kW Kilowatts.

L

L Electrical inductance in henries.
L Line or local control operation.
LAN Local area network.
lbs Weight of a substance in pounds.
LDS Low density foam.