ib amp Secondary current in phase B
Secondary current in phase C
Secondary current in phase N (measured)
in2 amp Secondary current in N (derived)
io amp Secondary zero phase sequence current
i1 amp Secondary +ve phase sequence current
i2 amp Secondary -ve phase sequence current
True-rms secondary current in phase A
True-rms secondary current in phase B
Irms C amp True-rms secondary current in phase C
BOC count
Breaker operation counter
(Count of total breaker operations-
local & relay tripping)
TC count
(Count of number of trips issued by relay)
BOT millisecond
Breaker operating time
(Breaker contact opening time for the latest
trip)
2.4.2 MEASUREMENT 2 Submenu
Parameter Unit Description
Thermal State % Thermal state of motor
Load Current %
value of load current (maximum value of
three phases)
Time to Th Trip second Time to Thermal Trip
Nb of Th Trip count Counter for number of Thermal trip
Last Start Time second Last start time
Counter for number of motor hot start
allowed
Nb Cold St Allow count
Counter for number of motor cold start
allowed
Time to Next st second Time before permitted start
Counter for number of starts
Counter for number of Emergency starts
Motor Run Time hour Total motor running hours
In the event of a fault, the type of the fault and fault current are displayed on LCD. The IED measures
the fault current and stores it in the non-volatile memory.
2.5 Opto Inputs
The device supports 6 numbers of opto-inputs. The use of these opto-inputs depends on the
application. There are a number of settings associated with the opto-inputs.
The relays have programmable opto-isolated logic inputs, which can be assigned to any available
function which are identified as Opto I/P 1 to Opto I/P 6. These inputs are used to acquire status of
external field signals such as CB close, CB open or can be programmed for function such as external
reset, External trigger to DR. by using P50 Configurator as well as relay user interface. On the user
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