nVent.com/RAYCHEM
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37RAYCHEM-OM-EU2032-NGCUIT3EX-EN-2203
This entry is used to create a contactor inspection maintenance schedule. Enter the number of times that contactors can be cycled
on/off before inspection and testing is desired. The NGC-UIT3 tracks the accumulated number of on/off switches for each contactor
and generates an alarm message to advise that contactor maintenance is due.
Range: 1–2,000,000
Default: 500,000
This window configures the Digital Inputs (if available) for a Circuit.
Fig. 3.18 Setup | Inputs window
This window is initially displayed with the empty boxes for Device Address and Input Number. If an “Auxiliary Contact” is available for
the Circuit output device (an optional set of contacts on a mechanical contactor or from an auxiliary relay in parallel with the heater
circuit) then this window allows those contacts to be associated with the circuit for power monitoring purposes. If the NGC-UIT
has attempted to turn a contactor ON, and the contactor fails to energize the circuit, then this digital input can be used to detect
the abnormal situation. Selecting Device Address and Input Number provide numerical input windows and lists of available input
locations. There is not default association of Input Number so Circuit 1 can be monitored from a set of relay contacts connected to DI
53-1 as in this example.
This window is initially displayed with the empty boxes for Device Address and Input Number. If the Branch Circuit Breaker for this
Circuit is equipped with “bell alarm contacts” that change state when the circuit breaker has tripped, then those contacts can be
monitored by the NGC-UIT. If the branch circuit breaker trips for high current or high ground fault, then the abnormal condition will
be detected by the UIT and displayed as an alarm condition. Selecting Device Address and Input Number provide numerical input
windows and lists of available input locations. There is not default association of Input Number so circuit breaker providing power to
Circuit 1 can be monitored by connecting its bell alarm contacts to DI 50-2 as in this example.
Pushing this button allows the user to define the relay condition that signals the alarm condition.
This window is initially displayed with the empty boxes for Device Address and Input Number. The Alarm text will show “User Alarm”.
The user can link a digital input to this user alarm. The user can define per circuit a user definable alarm text. In case the Digital Input
goes into alarm state (“Open” or “closed” depending upon the Alarm State selection) the alarm text will appear in the alarm summary.
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